TA31275FN/ TA31275FNG
03-01-23
1
TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA31275FN, TA31275FNG
AM/FM RF/IF Detector IC for Low Power Wireless System
The TA31275FN is an RF/IF detector IC for AM/FM radio.
The IC incorporates an RF amp, 2-level comparator, and local 8
circuit
Features
RF frequency: 240 to 450 MHz (multiplication is used)
100 to 450 MHz (multiplication is not used)
IF frequency: 10.7 MHz
Operating voltage range: 2.4 to 5.5 V
Current dissipation: 5.8 mA (FM)/5.4 mA (AM)
(except current at oscillator circuit)
Current dissipation at BS: 0 A (typ.)
Small package: 24-pin SSOP (0.65 mm pitch)
Block Diagram
Weight: 0.09 g (typ.)
12
4
3
5
6
7
8
10
11
13
21
22
20
19
18
17
16
15
14
SAW
RSSI
AM/FM
Comparator
8
RSSI REF
AM/FM MIX
IN
GND1
RF-
DEC
CHARGE
RF-
IN
DATA
GND2
BS
IF-IN
MIX
OUT
LoBS V
CC1
OSC-
IN
BPF
RF-
OUT
23
24
2
1
AF
OUT
LPF
OUT
LPF
IN
Detector
QUAD
V
CC2
IF-
DEC
V
CC
-
Lo
9
TA31275FN/ TA31275FNG
03-01-23
2
Pin Description
(the values of resistor and capacitor in the internal equivalent circuit are typical.)
Pin No.
Pin Name
Function
Internal Equivalent Circuit
1
OSC IN
Local oscillator input pin.
2 V
CC-Lo
Local' power supply pin
3 LOBS
Lo switch pin.
H:
8 circuit pin.
L: Through pass
4 MIX
OUT
Mixer output pin.
The output impedance of the pin is typically
330
.
5 V
CC1
Power supply pin 1.
6
IF IN
IF amp input pin.
7 IF
DEC
IF amp input pin.
Used as a bias coupling pin.
8
GND2
GND pin 2.
9
BS
Battery saving pin.
2 pF
1
15 k
5 k
5 k
15 k
5 k
70 k
3
245
4
6
7
170
170
3 k
40 k
9
TA31275FN/ TA31275FNG
03-01-23
3
Pin No.
Pin Name
Function
Internal Equivalent Circuit
10 QUAD
Phase-shift input terminal for the FSK
Demodulator.
Connect to the discriminator or LC.
11 V
CC2
Power supply pin 2.
12 DATA
FM/AM waveform shaping output pin.
Open collector output.
Connect a pull-up resistor.
13
RF IN
RF signal input pin.
14
RF DEC
Emitter pin for internal transistor.
16
RF OUT
RF amp output pin.
15 CHARGE
Control terminal for quick charge circuit.
To use the quick charge circuit, attach a
capacitor.
17
GND1
GND pin 1.
18
MIX IN
Mixer input pin.
19 AM/FM
Changeover switch for ASK/FSK.
Hi: AM
Lo: FM
10
500
1 k
1 pF
8 k
8 k
2 k
12
16
14
13
3 k
10 k
100 k
5 k
500
15
18
2.4 k
500
300 k
19
TA31275FN/ TA31275FNG
03-01-23
4
Pin No.
Pin Name
Function
Internal Equivalent Circuit
20 REF
Threshold input terminal for 2-level FM/AM
comparator.
21
RSSI
RSSI output pin.
22
AFOUT
Output terminal for FM demodulator.
23
LPF IN
FM/AM LPF input pin.
24
LPF OUT
FM/AM LPF output pin.
Equivalent circuits are given to help understand design of the external circuits to be connected. They do not
accurately represent the internal circuits.
24
23
20
500
5.5 k
100 k
100 k
DATA
COMP
33 k
22
30 k
21
30 k
23
5.5 k
24
500
TA31275FN/ TA31275FNG
03-01-23
5
Functions
1. Waveform Shaper Circuit (comparator)
The output data (pin 12) are inverted.
2. RSSI
Function
DC potential corresponding to the input level of IF IN (pin 6) is output to RSSI (pin 21). Output to RSSI
(pin 21) is converted to a voltage by the internal resistance. Thus, connecting external resistance R to pin
21 varies the gradient of the RSSI output as shown below. Note that due to the displacement of
temperature coefficients between external resistor R and the internal IC resistor IC resistor, the
temperature characteristic of the RSSI output may change. Also, the maximum RSSI value should be V
CC
- 1 V or less, because AM doesn't correct movement Filter AMP when voltage of RSSI high.
Figure 1
Figure 2
3. V
CC
Pin and GND Pin
Use the same voltage supply for V
CC
- Lo (2 pin) and V
CC1
(5 pin) and V
CC2
(11 pin) (or connect them).
Also, use the same voltage supply source for GND1 (17 pin) and GND2 (8 pin) (or connect them).
4. Local Oscillator Circuit
The local oscillator circuit is external-input-only. The device incorporates no transistor for oscillation.
Input to pin 1 at a level from 95 to 105dB
V.
Adjust the values of constants C107 and C108 shown in the application circuit diagram so that the input
level will become approximately 100dB
V.
By switching the Lo switch (LOBS), the frequency set by the external circuit can be used as-is without
using the
8 circuit.
Lo Switch (LOBS)
H
L
Local oscillation
status
8 circuit in operation
8 circuit halted/through pass
5. RF Amp Current Adjustment
The RF amp current dissipation can be regulated by varying resistor R as shown in the figure below.
When R
= 1 k, the current dissipation is approximately 600 A.
Figure 3
14
R
RF DEC
IF input level
After R is
connected
30 k
21
R
TA31275FN/ TA31275FNG
03-01-23
6
6. Battery-Saving (BS) Function and Lo Switch LOBS Function
The IC incorporates a battery-saving function and a Lo switch function. These function offer the
following selection.
FM Mode (FM/AM pin: L)
BS Pin/LOBS Pin
Circuit Status in the IC
IC Current
Dissipation
(at no signal)
H/H
Circuits in operation:
8 circuit
Mixer
RF amp
Comparator
IF amp
Detector circuit
RSSI
Comparator capacitor charger circuit
5.8 mA (typ.)
H/L
8 circuit only halted, Frequency set by External circuit can be
used as-is.
3.5 mA (typ.)
L/H
8 circuit only in operation
2.6 mA (typ.)
L/L All
circuits
0 mA (typ.)
AM Mode (FM/AM pin: H)
BS Pin/LOBS Pin
Circuit Status in the IC
IC Current
Dissipation
(at no signal)
H/H
Circuits in operation:
8 circuit
Mixer
RF amp
Comparator
IF amp
RSSI
Comparator capacitor charger circuit
5.4 mA (typ.)
H/L
8 circuit only halted, Frequency set by External circuit can be
used as-is.
3.1 mA (typ.)
L/H
8 circuit only in operation
2.6 mA (typ.)
L/L All
circuits
0 mA (typ.)
TA31275FN/ TA31275FNG
03-01-23
7
7. RF Amp Gain 2
RF amp gain 2 (G
v (RF) 2
) is a reference value calculated as follows. Measure G
RF
in the following figure.
G
v (RF) 2
is calculated as follows:
G
v (RF) 2
= G
RF
- G
v (MIX)
Figure 4
8. IF
Amp
Gain
The intended value is 75dB.
9. Waveform-Shaping Output Duty Cycle
The specified range of electrical characteristics is only available for single-tone.
10. Local Frequency Range (after multiplying frequency by 8)
When the multiplier circuit is used, the local frequency will be in the range 250.7 MHz to 439.3 MHz.
11. Treatment of FM Terminal when Using AM
When using AM, it is not necessary to treat the QUAD pin (pin 10). Leave it open or connected to an FM
external circuit. To use the bit rate filter, connect the RSSI pin (pin 21) to the bit rate filter through a
resistor. The AF-OUT pin (pin 22) should be left open.
Figure 5
Figure 6
Using AM causes current to flow through the AM/FM pin (pin 19). Ground the AM/FM pin (pin 19) or
connect it to the BS pin (pin 9).
R9
R8
AF
OUT
RSSI
Bit rate filter for FM
C18
C17
22
21
27 nH
1000 pF
4
6
18
16
13
33 nH
0.01
F
SG
50dB
V
G
RF
6 pF
6 pF
1 k
1000 pF
0.01
F
21
22
R9
AF
OUT
RSSI
Bit rate filter for AM
36 k
C18
TA31275FN/ TA31275FNG
03-01-23
8
12. Control Terminal for Quick Charge Circuit (CHARGE)
CHARGE (15 pin) is control terminal for quick charge circuit. REF (20 pin) control terminal for quick
charge a given period by time constant of internal resistance and outside capacitance. Enabling the
CHARGE pin requires an external capacitor. In normal operation, connect a capacitor having the same
capacitance as that of the capacitor connected to the REF pin (pin 20).
If the connected external capacitor (C11) is 0.1
F, the quick charge time is 7 ms (typically).
13. Bit Rate Filter for FM
The current FM bit rate filter is used as a tertiary filter.
If the filter is to be used at a rate other than 1200 bps, please change the filter constant.
Quadratic Filter (NRZ)
R10
R9
R8
C20
C19
C18
1200 bps
68 k
68
k
68
k
0.01
F
560 pF
3300 pF
2400 bps
68 k
68
k
68
k
4700 pF
270 pF
1500 pF
4800 bps
68 k
68
k
68
k
2200 pF
150 pF
680 pF
14. Bit Rate Filter for AM
The current AM bit rate filter is used as a quadratic filter.
If the filter is to be used at a rate other than 1200 bps, please change the filter constant.
Quadratic Filter (NRZ)
(the bit rate filter time constant takes into account the internal resistance RSSI (30 k
))
R
R10
C20
C19
1200 bps
36 k
68
k
4700 pF
1500 pF
2400 bps
36 k
68
k
2200 pF
680 pF
4800 bps
36 k
68
k
1000 pF
390 pF
When the filter constants shown below are used, it is not necessary to set the R constant value.
R
R10
C20
C19
1200 bps
30
k
6800 pF
2200 pF
2400 bps
30
k
3300 pF
1500 pF
4800 bps
30
k
1800 pF
820 pF
In addition, the current AM bit rate filter can be used as a tertiary filter.
If the filter is to be used at a rate other than 1200 bps, please change the filter constant.
TA31275FN/ TA31275FNG
03-01-23
9
Quadratic Filter (NRZ)
(the bit rate filter time constant takes into account the internal resistance RSSI (30 k
))
R R9 R10 C20 C19 C18
1200 bps
36 k
68
k
68
k
0.01
F
560 pF
3300 pF
2400 bps
36 k
68
k
68
k
4700 pF
270 pF
1500 pF
4800 bps
36 k
68
k
68
k
2200 pF
150 pF
680 pF
When the filter constants shown below are used, it is not necessary to set the R constant value.
R R9 R10 C20 C19 C18
1200 bps
30 k
30
k
0.033
F
2200 pF
8200 pF
2400 bps
30 k
30
k
0.015
F
1000 pF
3900 pF
4800 bps
30 k
30
k
6800 pF
470 pF
1800 pF
For the cutoff frequency of the bit rate filter, specify a sufficiently high value for the bit rate to be used.
Specifying a relatively high cutoff frequency for the bit rate filter enables a low capacitor to be used at
the REF pin, therefore making the pulse rise quickly.
When AM is used, the internal resistance of RSSI is used. So, take the output resistance into account
when specifying a cutoff frequency.
TA31275FN/ TA31275FNG
03-01-23
10
Cautions for Designing Circuit Board Patterns
Observe the following cautions when designing circuit patterns for this product.
Local Oscillator Circuit (pin 1)
Isolate the local oscillator circuit block sufficiently from the RF amp block.
Isolate the local oscillator circuit block securely so that its output will not get in the IF input, IF filter, or
mixer input.
Do not place the local oscillator circuit block too close to the ceramic filter.
Subdivide the ground pattern for the local oscillator circuit block, and connect the subdivisions with thin
lines.
Mixer Output Block (pin 4) to IF Input Block (pin 6)
Isolate the input and output patterns of the IF filter securely from each other.
Demodulator Circuit Block (pin 10)
Isolate the demodulator circuit block sufficiently from the IF input block (pin 6).
Do not place the LC too close to the IC device.
Data Output Block (pin 12)
Isolate the data output block sufficiently from the IF input block (pin 6).
Isolate the output pattern of the data output block from other circuits as much as possible, so any noise from
a stage subsequent to the output will not affect them.
RF Amp Circuit Block
(1)
Preventing RF amp oscillation
Do not place the patterns connected to pins 13 and 14 too close to each other.
Isolate the patterns connected to the input block (pin 13) and output block (pin 16) from each other.
Make the RF input signal line relatively thin.
Place a relatively wide ground pattern between the RF-IN pin (pin 13) and RF-DEC pin (pin 14).
Connect the RF-OUT pin (pin 16) and MIX-IN pin (pin 18) with the shortest possible pattern.
(2)
Attaining a sufficient gain
To attain a sufficient RF amp gain, select an optimum value for the input matching circuit block
(pin 13) according to the board circuit pattern.
IC Mounting Area
Provide a ground pattern under the IC device, and prepare relatively many through holes.
TA31275FN/ TA31275FNG
03-01-23
11
Maximum Ratings
(unless otherwise specified, Ta
=
25C. the voltage is with reference to the ground level.)
Characteristics Symbol
Rating
Unit
Supply voltage
V
CC
6 V
Power dissipation
P
D
780
mW
Operating temperature range
T
opr
-
40 to 85
C
Storage temperature range
T
stg
-
55 to 150
C
The maximum ratings must not be exceeded at any time. Do not operate the device under conditions outside the
above ratings.
Operable Range
(unless otherwise specified, Ta
=
25C. the voltage is with reference to the ground level.)
Characteristics Symbol
Test
Circuit
Test Condition
Min
Typ.
Max
Unit
Operating voltage range
V
CC
2.4 5.0 5.5 V
RF operating frequency 1
f
RF1
When frequency multiplication
is used
240
450
MHz
RF operating frequency 2
f
RF2
When frequency multiplication
is not used
100
450
MHz
Local frequency
f
LO
When frequency multiplication
is used (
8)
250.7
439.3
MHz
Operating ranges indicate the conditions for which the device is intended to be functional even with the electrical
changes.
Electrical Characteristics
(unless otherwise specified: Ta
=
25C, V
CC
=
5 V,
fin (RF)
=
fin (MIX)
=
314.9 MHz, fin (IF)
=
10.7 MHz)
Characteristics Symbol
Test
Circuit
Test Condition
Min
Typ.
Max
Unit
Current dissipation at battery saving
I
cco
3
BS
=
"L", LOBS
=
"L"
0 5
A
RF amp gain 1
G
v (RF) 1
1
(5)
The input and output
impedances are 50
.
-
9.0
-
6.0
-
3.0
dB
Mixer conversion gain
G
v (MIX)
17 21 25 dB
RSSI output voltage 1
V
RSSI1
V
in (IF)
=
35dB
VEMF
0.05 0.25 0.45
V
RSSI output voltage 2
V
RSSI2
V
in (IF)
=
65dB
VEMF
0.8 1.05 1.3 V
RSSI output voltage 3
V
RSSI3
V
in (IF)
=
100dB
VEMF
1.6 1.95 2.3 V
RSSI output resistance
R
RSSI
22 30 38 k
Comparator input resistance
R
COMP
75 100 125
k
Data output voltage (L level)
V
DATAL
1
(3) I
DATAL
=
500
A
0.4 V
Data output leakage current (H level)
I
DATAH
1
(4)
2
A
BS pin H-level input voltage
V
BSH
2.2
5.5 V
BS pin L-level input voltage
V
BSL
0
0.2 V
LOBS pin H-level input voltage
V
LOBSH
2.2
5.5 V
LOBS pin L-level input voltage
V
LOBSL
0
0.2 V
TA31275FN/ TA31275FNG
03-01-23
12
FM Mode
(Ta
=
25C, V
CC
=
5.0 V, fin (RF)
=
fin (MIX)
=
314.9 MHz, fin (IF)
=
10.7 MHz,
dev
=
20 kHz, fmod
=
600 Hz (single wave))
Characteristics Symbol
Test
Circuit
Test Condition
Min
Typ.
Max
Unit
Quiescent current consumption
(for FM)
I
ccqfm
2
(1)
BS/LOBS/FMAM
=
"H/H/L"
Fin (Lo)
=
40.7 MHz
4.3 5.8 7.3 mA
Demodulated output level
Vod
V
in (IF)
=
80dB
VEMF
30 40 55
mVrms
Waveform shaping duty ratio
DRfm 1
(2)
V
in (IF)
=
80dB
VEMF
For single tone
45 50 55 %
AM Mode
(Ta
=
25C, V
CC
=
5.0 V, fin (RF)
=
fin (MIX)
=
314.9 MHz, fin (IF)
=
10.7 MHz,
AM
=
90%, fmod
=
600 Hz (square wave))
Characteristics Symbol
Test
Circuit
Test Condition
Min
Typ.
Max
Unit
Quiescent current consumption
(for AM)
I
ccqam
2
(2)
BS/LOBS/FMAM
=
"H/H/H"
Fin (Lo)
=
40.7 MHz
4.0 5.4 6.8 mA
Reference characteristic data
DRam 1
(2)
V
in (IF)
=
80dB
VEMF
For single tone
45 50 55 %
Reference Characteristic Data
*
Characteristics Symbol
Test
Circuit
Test Condition
Typ.
Unit
IF amp input resistance
R
(IF) IN
330
RF amp gain 2
G
v (RF) 2
31
dB
RF amp input resistance
R
(RF)
IN
1.2 k
RF amp input capacitance
C
(RF)
IN
2.0 pF
RF amp output capacitance
C
(RF)
OUT
2.0 pF
Mixer input resistance
R
(MIX)
IN
1.5 k
Mixer input capacitance
C
(MIX)
IN
1.5 pF
Mixer output resistance
R
(MIX)
OUT
330
Mixer intercept point
IP3
96 dB
V
*
:
These characteristic data values are listed just for reference purposes. They are not guaranteed values.
Reference Characteristic Data
(FM mode)
*
Characteristics Symbol
Test
Circuit
Test Condition
Typ.
Unit
Limiting sensitivity
Vi (LIM)
IF input
35
dB
V
EMF
Signal-to-noise ratio 1
S/N1 1
(8) V
in (IF)
=
40dB
VEMF
40 dB
Signal-to-noise ratio 2
S/N2
1 (8)
V
in (IF)
=
80dB
VEMF
57 dB
*
:
These characteristic data values are listed just for reference purposes. They are not guaranteed values.
TA31275FN/ TA31275FNG
03-01-23
13
Typical Test Circuit
(FSK)
Test Circuit 1
(1) V
RSSI
(2)
D
R
(3) V
DATAL
(4)
I
DATAH
23
20
2.5 V
V
V
3.0 V
12
V
CC
I
=
V/100
10
3
V
100 k
SG
6
21
V
62
0.01
F
1000 pF
12
V
CC
V
R
=
10 k
23
20
2.5 V
V
V
3.0 V
Detector
12
4
3
5
6
7
8
10
11
13
21
22
20
19
18
17
16
15
14
RSSI
AM/FM
Comparator
8
RSSI REF
AM/FM MIX
IN
GND1
RF
DEC
CHARGE RF
IN
DATA
GND2
BS
IF
IN
MIX
OUT
LOBS
V
CC1
OSC
IN
100 k
0.1
F
0.01
F
0.01
F
560 pF
68 k
68 k
3300 pF
68 k
1 k
1000 pF
27nH
1 k
V
CC
BPF
V
CC
DATA
R4
C6
C3
V
CC
C20
C19
R10
R9
R8
C18
L4
R6
1000 pF
R5
C10
C9
V
CC
RF
OUT
6 pF
1000 pF
C13
0.01
F
C12
V
CC
V
CC
23
24
2
1
C17
C15 0.1
F
1000 pF
AF
OUT
LPF
OUT
LPF
IN
Detector
QUAD V
CC2
IF
DEC
R3
4.7 k
0.1
F
C14
0.1
F
C2
0.1
F
V
CC
C22
C11
>
=
C15
9
V
CC
0.01
F
0.1
F
C7
10
F
SG
6
12
51
0.01
F
100 k
V
CC
TA31275FN/ TA31275FNG
03-01-23
14
(5) G
v (RF) 1
(6)
G
v (MIX)
(7) G
v (MIX)
vs
V
LO
(8)
S/N1,
2
Test Circuit 2
I
ccqfm
I
ccqam
Test Circuit 3
I
cco
SG
1
4
51
0.01
F
0.01
F
6
18
SG
51
1000 pF
SG
13
16
51
1000 pF
51 k
1000 pF
SG
13
4
51
1000 pF
0.01
F
6
SG
1
24
51
0.01
F
13
SG
51
1000 pF
Buff
8
SG
1 k
V
CC
1
2
3
9
5
11
A
17
14
51
0.01
F
19
8
1 k
V
CC
14
2
5
16
A
17
9
8
SG
1 k
V
CC
1
2
3
9
5
11
A
14
17
51
0.01
F
19
TA31275FN/ TA31275FNG
03-01-23
15
Reference Data
(This is characteristics data when it used evaluation boards. This is not
guarantee on condition that it is stating except electrical characteristics.)
Quiescent Current Consumption
Supply Voltage Characteristics
Supply voltage V
CC
(V)
Quiescen
t curr
ent consump
t
ion
I
CC
(mA)
RF Amp Conversion Gain
Supply Voltage Characteristics
Supply voltage V
CC
(V)
RF amp
conve
r
si
on
gain
(dB)
RF Amp Frequency Characteristics
RF IN input frequency f (RF) in (MHz)
RF amp
conve
r
si
on
gain
(dB)
VCC
=
5 V
V (RF) in
=
50dB
V
<Meas point>
RFOUT at spectrum
analyzer
*
Input/output impedance
=
50
-
10
100
-
2
300
500 1000
-
7
-
5
-
3
-
4
-
6
-
8
-
9
DEC (R5)
=
750
DEC (R5)
=
1 k
Quiescent Current Consumption
Supply Voltage Characteristics FM Mode
Supply voltage V
CC
(V)
Quiescen
t curr
ent consump
t
ion
I
CCqfm
(
m
A
)
Quiescent Current Consumption
Supply Voltage Characteristics AM Mode
Supply voltage V
CC
(V)
Quiescen
t curr
ent consump
t
ion
I
CCqam
(
m
A
)
S Curve Characteristics (IF IN)
Detuning frequency (kHz)
S curve ou
tpu
t
volt
age
(V)
0
-
600
2.5
-
400
-
200
200
400
600
0.5
1.5
2
1
VCC
=
5 V
f (IF) in
=
10.7 MHz
+
f
V (IF) in
=
50dB
VEMF
<Meas point>
AFOUT at multi meter
110C
25C
-
40C
0
-
40C
110C
0
2
4
8
6
5
3
1
0
1
2
3
4
5
6
25C
7
f (Lo) in
=
40.7 MHz
V (Lo) in
=
100dB
VEMF
*
No switching pin current is
included.
110C
0
2
4
8
6
5
3
1
0
1
2
3
4
5
6
25C
-
40C
7
f (Lo) in
=
40.7 MHz
V (Lo) in
=
100dB
VEMF
*
No switching pin current is
included.
-
50
1
0
2
3
4
5
6
-
25
-
15
-
5
-
10
-
20
-
30
-
35
-
45
f (RF) in
=
314.9 MHz
V (RF) in
=
50dB
VEMF
<Meas point>
RFOUT at spectrum analyzer
*
Input/output impedance
=
50
110C
25C
-
40C
-
40
f (Lo) in
=
40.7 MHz
V (Lo) in
=
100dB
V
*
No switching pin
current is
included.
0
2
4
7
6
5
3
1
0
BS
1
2
3
4
5
6
Multiplication only
Multiplication off
AM_ALL
FM_ALL
TA31275FN/ TA31275FNG
03-01-23
16
Reference Data
(This is characteristics data when it used evaluation boards. This is not
guarantee on condition that it is stating except electrical characteristics.)
VCC
=
5 V
f (IF) in
=
10.7 MHz
Dev
=
20 kHz
fmod
=
600 Hz
<Meas point>
FILOUT at audio
analyzer
-
70
-
20
10
0 20
60
100
120
-
10
-
20
-
30
-
40
-
50
40 80
N
S
+
N
AMR
0
-
60
S/N Characteristics (IF input) in the
FM Mode
IF IN input level V (IF) in (dB
VEMF)
S
+
N,
N
(dB)
S/N Characteristics (IF input) in the
AM Mode
IF IN input level V (IF) in (dB
VEMF)
S
+
N,
N
(dB)
-
90
-
20
10
0 20
60
100
120
-
10
-
20
-
40
-
60
-
80
40
80
S
+
N
N
VCC
=
5 V
f (IF) in
=
10.7 MHz
AM
=
90%
fmod
=
600 Hz
<Meas point>
FILOUT at audio
analyzer
0
-
30
-
50
-
70
S/N Characteristics (MIX input) in the AM
Mode when Multiplication is Used
MIX IN input level V (MIX) in (dB
VEMF)
S
+
N,
N
(dB)
RSSI Output Voltage Characteristics
(IF, MIX, and RF inputs)
Input level Vin (dB
VEMF)
RSS
I
o
u
tpu
t
vol
t
ag
e
VRSSI
(V)
RSSI Output Voltage Characteristics
(MIX inputs)
MIX IN input level V (MIX) in (dB
VEMF)
RSS
I
o
u
tpu
t
vol
t
ag
e
VRSSI
(V)
S/N Characteristics (MIX input) in the AM
Mode when Multiplication is Used
MIX IN input level V (MIX) in (dB
VEMF)
S
+
N,
N
(dB)
0
-
20
2.5
0 20
60 80
120
0.5
1.5
2
1
f (RF) in
=
f (MIX) in
=
314.9 MHz/VCC
=
5 V
f (IF) in
=
10.7 MHz
f (Lo) in
=
40.7/304.2 MHz
V (Lo) in
=
100dB
V
<Meas point>
RSSI at multi meter
IF IN
MIXIN
(multiplication
is not used)
MIXIN
(multiplication
is used)
40 100
RF IN
0
-
20
2.5
0 20
60 80
120
0.5
1.5
2
1
VCC
=
5 V
f (MIX) in
=
314.9 MHz
f (Lo) in
=
40.7 MHz
V (Lo) in
=
100dB
V
LOBS
=
H
<Meas point>
RSSI at multi meter
-
40C
110C
40 100
25C
N
S
+
N
VCC
=
5 V
f (MIX) in
=
314.9 MHz
f (Lo) in
=
304.2 MHz
V (Lo) in
=
100dB
V
AM
=
90%
fmod
=
600 Hz
(rectangular wave)
LOBS
=
"H"
<Meas point>
FILOUT at audio
analyzer
-
90
-
20
10
0 20
60
100
120
-
10
-
20
-
40
-
60
-
80
40 80
0
-
30
-
50
-
70
110C
110C
-
70
-
20
10
0 20
60
100
120
-
20
-
30
-
40
-
50
40 80
-
40C
0
-
60
VCC
=
5 V
f (MIX) in
=
314.9 MHz
f (Lo) in
=
40.7 MHz
f (Lo) in
=
100dB
V
Dev
=
20 kHz
fmod
=
600 Hz
LOBS
=
"H"
<Meas point>
FILOUT at audio
analyzer
25C
110C
25C
-
40C
25C
-
40C
TA31275FN/ TA31275FNG
03-01-23
17
Reference Data
(This is characteristics data when it used evaluation boards. This is not
guarantee on condition that it is stating except electrical characteristics.)
-
40C
-
25
-
600
5
-
400
-
200 600
0
-
5
-
10
-
15
-
20
0 400
VCC
=
5 V
f (IF) in
=
50dB
VEMF
f (IF) in
=
10.7 MHz
+
f
Dev
=
20 kHz
fmod
=
600 Hz
<Meas point>
FILOUT at audio analyzer
110C
25C
200
-
30
50
30
60 70
90
110 120
20
10
0
-
10
-
20
80 100
VCC
=
5 V
f (MIX) in
=
314.9 MHz
V (MIX) in
=
60dB
V
f (Lo) in
=
40.7 MHz
<Meas point>
MIXOUT at spectrum
analyzer
*
Terminated with the IF
input impedance
Multiplication
is used
Multiplication
is not used
-
50
-
30
-
10
30
10
0
-
20
-
40
1 2 3 4 5 6
20
f (MIX) in
=
314.9 MHz
V (MIX)
=
60dB
V
f (Lo) in
=
40.7 MHz
V (Lo) in
=
100dB
V
LOBS
=
"H"
<Meas point>
MIXOUT at spectrum
analyzer
*
Terminated with the
IF input impedance
110C
-
40C
25C
8
100
24
300
500 1000
18
22
20
16
12
VCC
=
5 V
V (MIX) in
=
60dB
V
V (Lo) in
=
100dB
V
LOBS
=
"L" (direct input)
<Meas point>
MIXOUT at spectrum
analyzer
*
Terminated with the IF
input impedance
110C
-
40C
25C
14
10
Mixer Conversion Gain Frequency
Characteristics
MIX IN input frequency f (MIX) in (MHz)
M
i
xer
con
v
er
sion
g
a
in G
V
(M
IX)
(d
B)
Mixer Conversion Gain
Local Input Level Characteristics
Local input level V (L
o
) in (dB
V)
M
i
xer
con
v
er
sion
g
a
in G
V
(M
IX)
(d
B)
Mixer Conversion Gain
Supply Voltage Characteristics
Local input level V (L
o
) in (dB
V)
M
i
xer
con
v
er
sion
g
a
in G
V
(
d
B
)
Mixer Conversion Gain
Local Input Level Characteristics
Local input level V (L
o
) in (dB
V)
M
i
xer
con
v
er
sion
g
a
in G
V
(M
IX)
(d
B)
-
40
50
30
60 70
90
110 120
20
10
-
10
-
20
-
30
80 100
VCC
=
5 V
f (MIX) in
=
314.9 MHz
V (MIX) in
=
60dB
V
f (Lo) in
=
40.7 MHz
LOBS
=
"H"
<Meas point>
MIXOUT at spectrum
analyzer
*
Terminated with the
IF input impedance
110C
25C
0
-
40C
Detuning Characteristics
Detuning frequency (kHz)
Atte
nuation leve
l
(
d
B)
Mixer Intercept Point
0
40
160
60 80
120
120
80
60
40
20
100
VCC
=
5 V
f (MIX) in
=
314.9 MHz
f (Lo) in
=
40.7 MHz
V (Lo) in
=
100dB
V
fmod
=
600 Hz
<Meas point>
MIXOUT at spectrum
analyzer
Desired wave
Interference
wave
140
100
Mixer outp
u
t
le
vel
V (MIX)
ou
t
(d
B
V)
TA31275FN/ TA31275FNG
03-01-23
18
Reference Data
(This is characteristics data when it used evaluation boards. This is not
guarantee on condition that it is stating except electrical characteristics.)
Demodulation Distortion Characteristics
Detuning frequency (IF IN) (kHz)
Demodula
t
ion
di
sto
r
tion
(dB)
-
40
-
600
-
15
-
400 0 400
600
-
20
-
25
-
30
-
35
-
200 200
VCC
=
5 V
f (IF) in
=
10.7 MHz
Vin
=
50dB
V
Dev
=
20 kHz
AM/FM
=
"L"
<Meas point>
FILOUT at audio analyzer
*
The FILOUT output signal
is measured with a noise
meter after amplified.
Supply voltage V
CC
(V)
W
a
ve
form shap
ing outpu
t
d
u
ty ratio
DR
(%)
Waveform Shaping Duty Ratio
Supply Voltage Characteristics FM Mode
Supply voltage V
CC
(V)
Demodula
t
ion
ou
tp
ut
(m
V
r
ms)
Demodulation Output
Supply Voltage Characteristics (FM)
110C
34
1
54
2 3
5 6
50
46
42
40
4
f (IF) in
=
10.7 MHz
V (IF) in
=
50dB
VEMF
Dev
=
20 kHz
fmod
=
600 Hz
<Meas point>
DATA at oscilloscope
36
44
48
52
-
40C
25C
38
110C
0
1
45
2 3
5 6
35
25
15
10
4
f (IF) in
=
10.7 MHz
V (IF) in
=
50dB
VEMF
Dev
=
20 kHz
fmod
=
600 Hz
<Meas point>
FILOUT at audio analyzer
5
20
30
40
25C
-
40C
TA31275FN/ TA31275FNG
03-01-23
19
Reference Data
(with a broadband ceramic filter (280 k) used)
12-dB SINAD Sensitivity Characteristics
FM Modulation
12-dB SINAD sensitivity
Supply Voltage Characteristics
S/N and AMR RF Input Characteristics
(Dev
=
20 k)
FM modulation Dev (kHz)
Supply voltage V
CC
(V)
RF IN input level V (RF) in (dB
VEMF)
12-dB SI
NA
D sen
s
i
t
ivi
t
y
(
dB
VEM
F
)
12-dB SI
NA
D sen
s
i
t
ivi
t
y
(
dB
VEM
F
)
S
+
N,
AMR
(dB)
0 20 40
80
100
60
-
7
2
0
-
2
-
4
-
5
VCC
=
5 V
f (RF) in
=
314.9 MHz
fmod
=
600 Hz
f (Lo) in
=
40.7 MHz
V (Lo) in
=
100dB
V
LOBS
=
"H"
No SAW filter
<Meas point>
FILOUT at audio
analyzer
-
6
-
3
-
1
1
Sensitivity Detuning Characteristics
(AM and FM modulation)
RF IN input frequency f (RF) in (MHz)
12-dB SI
NA
D sen
s
i
t
ivi
t
y
(
dB
VEM
F
)
S/N and AMR RF Input Characteristics
(Dev
=
40 k)
RF IN input level V (RF) in (dB
VEMF)
S
+
N,
AMR
(dB)
S Curve Supply Voltage Characteristics
RF IN input frequency f (RF) in (MHz)
AFOUT
p
i
n
volt
age
(
V
)
30dB
VMF
0
314.4
2.5
314.55 314.7
315 315.15
315.45
0.5
1.5
2
1
VCC
=
5 V
fmod
=
600 Hz
f (Lo) in
=
40.7 MHz
V (Lo) in
=
100dB
V
LOBS
=
"H"
No SAW filter
<Meas point>
FILOUT at multi meter
0dB
VMF
314.85
315.3
40dB
VMF
20dB
VMF
10dB
VMF
-
1.5
3
2
1
0
-
0.5
VCC
=
5 V
Dev
=
20 kHz
fmod
=
600 Hz
f (Lo) in
=
40.7 MHz
V (Lo) in
=
100dB
V
LOBS
=
"H"
No SAW filter
<Meas point>
FILOUT at audio
analyzer
-
1
0.5
1.5
2.5
1 2 3
5 6
4
-
70
-
20
10
0 20
60
100
120
-
10
-
20
-
30
-
40
-
50
40 80
N
S
+
N
AMR
0
-
60
VCC
=
5 V
f (RF) in
=
314.9 MHz
fmod
=
600 Hz
f (Lo) in
=
40.7 MHz
V (Lo) in
=
100dB
V
LOBS
=
"H"
No SAW filter
<Meas point>
FILOUT at audio analyzer
-
70
-
20
10
0 20
60
100
120
-
10
-
20
-
30
-
40
-
50
40 80
N
S
+
N
AMR
0
-
60
VCC
=
5 V
f (RF) in
=
314.9 MHz
fmod
=
600 Hz
f (Lo) in
=
40.7 MHz
V (Lo) in
=
100dB
V
LOBS
=
"H"
No SAW filter
<Meas point>
FILOUT at audio analyzer
Dev
=
80 k
Dev
=
20 k
-
10
314.6
10
314.7
314.8
314.9 315
315.2
0
4
8
6
2
-
2
-
4
-
8
AM
VCC
=
5 V
f (RF) in
=
314.9
MHz
fmod
=
600 Hz
f (Lo) in
=
40.7
MHz
V (Lo) in
=
100dB
V
LOBS
=
"H"
No SAW filter
<Meas point>
FILOUT at audio
analyzer
315.1
-
6
Dev
=
40 k
Dev
=
60 k
TA31275FN/ TA31275FNG
03-01-23
20
Reference Data
(with a broadband ceramic filter (280 k) used)
Reference Data
(with a narrowband ceramic filter (150 k) used)
-
5
1.5 4.5
5.5
-
2
-
2.5
-
3.5
-
4.5
2.5
-
1
-
0.5
-
1.5
-
3
-
4
3.5
VCC
=
5 V
f (RF) in
=
314.9 MHz
Dev
=
20 kHz
fmod
=
600 Hz
f (Lo) in
=
40.7 MHz
V (Lo) in
=
100dB
V
LOBS
=
"H"
No SAW filter
<Meas point>
FILOUT at audio analyzer
0
Demodulation Output
Supply Voltage Characteristics
Waveform Shaping Output Duty Ratio
Supply Voltage Characteristics
12-dB SINAD Sensitivity
FM Modulation Characteristics
12-dB SINAD Sensitivity
Frequency Characteristics (AM and FM)
12-dB SINAD Sensitivity
Supply Voltage Characteristics
S Curve Supply Voltage Characteristics
Supply voltage V
CC
(V)
Supply voltage V
CC
(V)
FM modulation (kHz)
RF IN input frequency f (RF) in (MHz)
Supply voltage V
CC
(V)
RF IN input frequency f (RF) in (MHz)
W
a
ve
form shap
ing outpu
t
d
u
ty ratio
DR
(%)
Demodula
t
ion
ou
tp
ut V
o
d
(m
V
r
ms)
12-dB SI
NA
D sen
s
i
t
ivi
t
y
(
dB
VEM
F
)
12-dB SI
NA
D sen
s
i
t
ivi
t
y
(
dB
VEM
F
)
AFOUT
p
i
n
volt
age
(
V
)
12-dB SI
NA
D sen
s
i
t
ivi
t
y
(
dB
VEM
F
)
0
1
140
2 3
5 6
100
80
60
40
4
Dev
=
20 kHz
120
20
Dev
=
40 kHz
Dev
=
60 kHz
VCC
=
5 V
f (RF) in
=
314.9 MHz
fmod
=
600 Hz
f (Lo) in
=
40.7 MHz
V (Lo) in
=
100dB
V
LOBS
=
"H"
No SAW filter
<Meas point>
FILOUT at mult meter
40
0
60
1 3 5
6
56
52
48
46
4
VCC
=
5 V
f (RF) in
=
314.9 MHz
fmod
=
600 Hz
f (Lo) in
=
40.7 MHz
V (Lo) in
=
100dB
V
LOBS
=
"H"
No SAW filter
<Meas point>
DATA at oscilloscope
42
50
54
58
Dev
=
40 k
44
2
Dev
=
20 k
-
7
0
-
1
1 3 5
6
-
3
-
5
4
VCC
=
5 V
f (RF) in
=
314.9 MHz
fmod
=
600 Hz
f (Lo) in
=
40.7 MHz
V (Lo) in
=
100dB
V
LOBS
=
"H"
SAW FILTER
No SAW filter
-
4
-
2
-
6
2
-
10
314.7
10
314.75 314.8
315 315.1
2
0
-
4
-
8
314.9
6
Dev
=
40 kHz
Dev
=
20 kHz
AM
8
4
-
2
-
6
314.85
314.95 315.05
VCC
=
5 V
f (RF) in
=
314.9 MHz
fmod
=
600 Hz
f (Lo) in
=
40.7 MHz
V (Lo) in
=
100dB
V
LOBS
=
"H"
SAW FILTER
No SAW filter
<Meas point>
FILOUT at audio
analyzer
30dB
VEMF
40dB
VEMF
0
314.4
2.5
314.55 314.7
315 315.15
315.45
0.5
1.5
2
1
VCC
=
5 V
fmod
=
600 Hz
f (Lo) in
=
40.7 MHz
V (Lo) in
=
100dB
V
LOBS
=
"H"
No SAW filter
<Meas point>
FILOUT at multi meter
50dB
VEMF
314.85
315.3
20dB
VEMF
10dB
VEMF
0dB
VEMF
TA31275FN/ TA31275FNG
03-01-23
21
Reference Data
(with a narrowband ceramic filter (150 k) used)
S/N and AMR RF Input Characteristics
(Dev
=
20 k)
S/N and AMR RF Input Characteristics
(Dev
=
40 k)
Waveform Shaping Output Duty Ratio
Supply Voltage Characteristics
RF IN input level V (RF) in (dB
VEMF)
RF IN input level V (RF) in (dB
VEMF)
S
+
N,
N,
AMR
(dB)
S
+
N,
N,
AMR
(dB)
W
a
ve
form shap
ing outpu
t
d
u
ty ratio
DR
(%)
Supply voltage V
CC
(V)
AMR
-
70
-
20
10
0 20
60
100
120
-
10
-
20
-
30
-
40
-
50
40 80
N
S
+
N
0
-
60
VCC
=
5 V
f (RF) in
=
314.9 MHz
fmod
=
600 Hz
f (Lo) in
=
40.7 MHz
V (Lo) in
=
100dB
V
LOBS
=
"H"
No SAW filter
<Meas point>
FILOUT at audio
analyzer
AMR
-
60
-
20
10
0 20
60
100
120
-
10
-
20
-
30
-
40
-
50
40 80
N
S
+
N
0
VCC
=
5 V
f (RF) in
=
314.9 MHz
fmod
=
600 Hz
f (Lo) in
=
40.7 MHz
V (Lo) in
=
100dB
V
LOBS
=
"H"
No SAW filter
<Meas point>
FILOUT at audio
analyzer
Dev
=
20
40
1
60
2 3 4 5 6
50
54
58
56
52
48
46
42
VCC
=
5 V
f (RF) in
=
314.9 MHz
V (RF) in
=
20dB
V
fmod
=
600 Hz
f (Lo) in
=
40.7 MHz
V (Lo) in
=
100dB
V
LOBS
=
"H"
No SAW filter
<Meas point>
DATA at oscilloscope
Dev
=
40
44
TA31275FN/ TA31275FNG
03-01-23
22
Application Circuit
(FSK)
CF: SFELA10M7FA00-B0 (Murata Mfg. Co., Ltd.)--broadband (280 k)
SFELA10M7JAA0-B0 (Murata Mfg. Co., Ltd.)--narrowband (150 k)
LC: P-5DJ (Sumida Corporation)
V
CC
0.01
F
10 pF
120 k
3.6 k
33 k
10
F
10 pF
R100
56 pF
C109
C107
R101
47 pF
C103
C108
C106
C101
C100
R102
0.1
F
X1
12
4
3
5
6
7
8
10
11
13
21
22
20
19
18
17
16
15
14
SAW
RSSI
AM/FM
Comparator
8
RSSI
REF
AM/FM MIX
IN
GND1
RF
DEC
CHARGE
RF
IN
DATA
GND2
BS
IF
IN
MIX
OUT
LOBS
V
CC1
OSC
IN
100 k
0.1
F
0.01
F
0.01
F
560 pF
68 k
68 k
3300 pF
68 k
1 k
33 nH
1000 pF
27 nH
1 k
V
CC
BPF
V
CC
DATA
R4
C6
C3
V
CC
C20
C19
R10
R9
R8
C18
L4
R6
1000 pF
R5
C10
C9
6 pF
RF IN
V
CC
RF
OUT
6 pF
1000 pF
C13
0.01
F
C12
V
CC
V
CC
23
24
2
1
C17
C15
0.1
F
1000 pF
AF
OUT
LPF
OUT
LPF
IN
Detector
QUAD V
CC2
IF
DEC
C2
0.1
F
V
CC
V
CC
Lo
C22
C8
L5
C11
>
=
C15
40.7 MHz
9
V
CC
0.1
F
C7
Detector
R3
4.7 k
0.1
F
C5
TA31275FN/ TA31275FNG
03-01-23
23
Application Circuit
(ASK)
CF: SFELA10M7FA00-B0 (Murata Mfg. Co., Ltd.)--broadband (280 k)
SFELA10M7JAA0-B0 (Murata Mfg. Co., Ltd.)--narrowband (150 k)
V
CC
0.01
F
40.7 MHz
10 pF
120 k
3.6 k
33 k
10
F
10 pF
R100
56 pF
C109
C107
R101
47 pF
C103
C108
C106
C101
C100
0.1
F
X1
12
4
3
5
6
7
8
9
10
11
13
21
22
20
19
18
17
16
15
14
SAW
RSSI
AM/FM
Comparator
8
RSSI REF
AM/FM
MIX
IN
GND1
RF
DEC
CHARGE RF
IN
DATA
GND2
BS
IF
IN
MIX
OUT
LOBS
V
CC1
OSC
IN
100 k
0.1
F
0.01
F
0.01
F
560 pF
68 k
3300 pF
1 k
33 nH
1000 pF
27 nH
1 k
V
CC
BPF
V
CC
DATA
R4
C6
C3
V
CC
C20
C19
R10
C18
L4
R6
R5
C10
C9
6 pF
RF IN
V
CC
RF
OUT
6 pF
1000 pF
C13
0.01
F
C12
V
CC
23
24
2
C15
0.1
F
AF
OUT
LPF
OUT
LPF
IN
Detector
QUAD V
CC2
IF
DEC
C7
10
F
C2
0.1
F
V
CC
V
CC
V
CC
Lo
C8
L5
C11(
>
=
C15)
R9
68 k
36 k
0.1
F
To pin 9
To pin 19
1
Mi
TA31275FN/ TA31275FNG
03-01-23
24
Package Dimensions
Weight: 0.09 g (typ.)
TA31275FN/ TA31275FNG
03-01-23
25
TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor
devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical
stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of
safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of
such TOSHIBA products could cause loss of human life, bodily injury or damage to property.
In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as
set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and
conditions set forth in the "Handling Guide for Semiconductor Devices," or "TOSHIBA Semiconductor Reliability
Handbook" etc..
The TOSHIBA products listed in this document are intended for usage in general electronics applications
(computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances,
etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires
extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or
bodily injury ("Unintended Usage"). Unintended Usage include atomic energy control instruments, airplane or
spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments,
medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this
document shall be made at the customer's own risk.
The products described in this document are subject to the foreign exchange and foreign trade laws.
The information contained herein is presented only as a guide for the applications of our products. No
responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other
rights of the third parties which may result from its use. No license is granted by implication or otherwise under
any intellectual property or other rights of TOSHIBA CORPORATION or others.
The information contained herein is subject to change without notice.
000707EBA
RESTRICTIONS ON PRODUCT USE
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