Document Outline
- FEATURES
- APPLICATIONS
- GENERAL DESCRIPTION
- QUICK REFERENCE DATA
- ORDERING INFORMATION
- BLOCK DIAGRAM AND APPLICATION CIRCUIT
- PINNING
- LIMITING VALUES
- DC CHARACTERISTICS
- AC CHARACTERISTICS
- TEST AND APPLICATION INFORMATION
- PACKAGE OUTLINE
- SOLDERING
- DEFINITIONS
- LIFE SUPPORT APPLICATIONS
DATA SHEET
Product specification
Supersedes data of January 1991
File under Integrated Circuits, IC01
1996 May 14
INTEGRATED CIRCUITS
TDA7088T
FM receiver circuit for battery
supply
1996 May 14
2
Philips Semiconductors
Product specification
FM receiver circuit for battery supply
TDA7088T
FEATURES
Equipped with all stages of a mono receiver from
antenna to audio output
Mute circuit
Search tuning with a single varicap diode
Mechanical tuning with integrating AFC
AM application supported
Power supply polarity protection
Power supply voltage down to 1.8 V.
APPLICATIONS
Mechanical tuning; this is possible with or without
integrating AFC circuit
Electrical tuning; this is realized by one directional
(band-up) search tuning facility, including RESET to the
lower-band limit.
GENERAL DESCRIPTION
The TDA7088T is a bipolar integrated circuit for use in
mono portable and pocket radios. It is used when a
minimum of peripheral components (of small dimensions
and low costs) is important. The circuit contains a
frequency-locked-loop (FLL) system with an Intermediate
Frequency (IF) of about 70 kHz. Selectivity is achieved by
active RC-filters. De-tuning related to the IF and too weak
input signals is suppressed by the mute circuit.
QUICK REFERENCE DATA
ORDERING INFORMATION
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
V
P
supply voltage
1.8
3
5
V
I
P
supply current
4.2
5.2
6.6
mA
f
iRF
radio input frequency
0.5
-
110
MHz
V
i(rms)
RF sensitivity input voltage
(RMS value)
V
oAF
=
-
3 dB; V
oAF
= 0 dB
at V
i
= 1 mV; mute off
-
3
6
V
signal handling
f =
75 kHz; THD < 10%
100
200
-
mV
V
o(rms)
audio output signal (RMS
value)
R
L
= 22 k
60
85
120
mV
T
amb
operating ambient temperature
-
10
-
+70
C
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
TDA7088T
SO16
plastic small outline package; 16 leads; body width 3.9 mm
SOT109-1
1996 May 14
3
Philips Semiconductors
Product specification
FM receiver circuit for battery supply
TDA7088T
BLOCK DIAGRAM AND APPLICATION CIRCUIT
handbook, full pagewidth
MEH089
MIXER
TD
A7088T
VCO
14
16
1
2
3
15
r
un
13
10
9
8
7
6
AF
V2
L1
reset
&
+
+
R
MUTE
SEARCH
TUNING
S
ALLP
ASS
FIL
TER
10 k
5.6
k
2.2 k
2.2 k
6 k
5.4 k
6 k
DEMODULATOR
22 nF
LOOP FILTER
AF
V2
V3
-
1
5 k
22 k
1.8 nF
0.1
F
0.1
F
0.1
F
680
pF
10 nF
3 V
BB910
78
nH
70
nH
82
pF
+
1
68
pF
220 pF
3.3 nF
3.9 nF
IF
LIMITER
180 pF
330 pF
470 pF
V1
V2
11
12
5
4
V
P
V
P
V
P
V
oAF
Fig.1 Block diagram and application circuit for search tuning.
V1, V2 and V3 are internal voltages.
1996 May 14
4
Philips Semiconductors
Product specification
FM receiver circuit for battery supply
TDA7088T
PINNING
SYMBOL
PIN
DESCRIPTION
MUTE
1
mute output
V
oAF
2
audio frequency output signal
LOOP
3
AF loop filter
V
P
4
+3 V supply voltage
OSC
5
oscillator resonant circuit
IFFB
6
IF feedback
C
LP1
7
low-pass capacitor of 1 dB amplifier
V
oIF
8
IF output to external coupling
capacitor (high-pass)
V
iIF
9
IF input to limiter amplifier
C
LP2
10
low-pass capacitor of IF limiter
amplifier
V
iRF
11
radio frequency input
V
iRF
12
radio frequency input
C
LIM
13
limiter offset voltage capacitor
GND
14
ground (0 V)
C
AP
15
all-pass filter capacitor/input for
search tuning
TUNE
16
electrical tuning/AFC output
Fig.2 Pin configuration.
handbook, halfpage
TDA7088T
MGE664
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
MUTE
VoAF
LOOP
VP
OSC
IFFB
CLP1
VoIF
TUNE
CAP
GND
CLIM
ViRF
ViRF
CLP2
ViIF
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
Note
1. There is no special ESD protection circuit built-in; ESD data on request.
SYMBOL
PARAMETER
MIN.
MAX.
UNIT
V
P
supply voltage
0
5
V
T
stg
storage temperature
-
55
+150
C
T
amb
operating ambient temperature
-
10
+70
C
V
es
electrostatic handling; note 1
-
-
-
1996 May 14
5
Philips Semiconductors
Product specification
FM receiver circuit for battery supply
TDA7088T
DC CHARACTERISTICS
V
P
= 3 V; T
amb
= 25
C; unless otherwise specified.
AC CHARACTERISTICS
V
P
= 3 V; T
amb
= 25
C; f
iRF
= 96 MHz modulated with f
mod
= 1 kHz and
22.5 kHz deviation; V
i
= 400
V (measured as
EMF; R
S
= 75
) and measurements taken in Fig.4; unless otherwise specified.
SYMBOL
PARAMETER
MIN.
TYP.
MAX.
UNIT
V
P
supply voltage (pin 4)
1.8
3
5
V
I
P
supply current (pin 4)
4.2
5.2
6.6
mA
V
1
DC voltage on pin 1
2.50
2.55
2.60
V
V
3
DC voltage on pin 3
2.64
2.69
2.74
V
V
6, 7
DC voltage on pins 6 and 7
2.38
2.44
2.50
V
V
8
DC voltage on pin 8
1.60
1.67
1.74
V
V
9, 10, 13
DC voltage on pins 9, 10 and 13
2.42
2.47
2.52
V
V
11, 12
DC voltage on pins 11 and 12
0.91
0.94
0.98
V
V
15
DC voltage on pin 15
2.06
2.12
2.18
V
I
2
AF output current on pin 2
45
60
80
A
I
5
oscillator current on pin 5
275
375
500
A
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
V
i(rms)
RF sensitivity input voltage
(RMS value)
V
oAF
=
-
3 dB; V
oAF
= 0 dB
at V
i
= 1 mV; see Fig.3
mute off
-
3
6
V
mute on
3
6
12
V
-
5
10
V
signal handling
f =
75 kHz; THD < 10%
100
200
-
mV
signal plus noise-to-noise ratio
see Fig.3
52
56
-
dB
THD
total harmonic distortion
f =
22.5 kHz
-
1
1.4
%
f =
75 kHz
-
2.4
3.3
%
AM
AM suppression
FM: 1 kHz;
75 kHz;
AM: 1 kHz; m = 0.8
47
52
-
dB
RR
1000
ripple rejection
100 mV RMS ripple on V
P
;
f = 1 kHz
7
10
-
dB
V
o(rms)
audio output signal (RMS value) R
L
= 22 k
60
85
120
mV
Search tuning (with BB910 and C
16
= 0.1
F) see Fig.1
V
16
minimum output voltage on
pin 16
limiting point
-
V
P
-
1.85
-
V
V/
t
tuning steepness
voltage at pin 16
95
210
420
mV/s
f
osc
/
t
oscillator steepness
1.25
2.83
5.6
MHz/s
I
AFC
/
V
3
AFC steepness
voltage at pin 3
4.75
9.5
19
S
S
N
+
N
--------------
26 dB
=
S
N
+
N
--------------
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