GL3361
1
Low Power Narrow Band FM IF
Description
The GL3361 is designed for use in FM dual conversion
communications equipment. This device contains an Os-
cillator, Mixer, Limiting Amplifier, Filter Amplifier and
Squelch circuitry.
Features
Operating Voltage : 2.0 ~ 8.0 V
Low Power Consumption (2.6mA typical @ Vcc=4.0Vdc)
Excellent Input Sensitivity (-3dB limiting=2.6 typical)
Minimum Number of External Parts Required
Full ESD Protection
Package Type : 16 DIP/SOP
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
OSC1
OSC2
MIXOUT
VCC
DEC1
DEC2
QUAD
LIMIN
MIXIN
GND
MUTE
SCAN
SQIN
FLTOUT
FLTIN
AFOUT
Pin Configurations
Block Diagram
The information in this document is subject to change without notice.
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Oscillator
Mixer
Squelch Trigger with Hysteresis
Filter
Amp
AF
Amp
Demodulator
Limiter
Amp
Crystal OSC
Mixer
output
Vcc
Limiter
input
Decoupling
Quad
coil
IF
input
GND
Mute
Scan
control
Squelch
input
Filter
output
Filter
input
Audio
output
-
+
GL3361
GL3361
2
Characteristics
Pin
Power Supply Voltage
Operating Supply Voltage Range
4
Operating Temperature Range
Storage Temperature Range
4
-
-
Symbol
Vcc(max)
Vcc
Ta
Tstg
Value
10
2.0 to 8.0
0 to +70
-65 to +150
Unit
Vdc
Vdc
Absolute Maximum Ratings
(Ta=25
, unless otherwise noted)
( Vcc=4.0Vdc, fo=10.7MHz,
f=
3kHz,fmod=1.0kHz,Ta=25
, unless otherwise noted )
Electrical Characteristics
* Notice : Absolute maximum ratings are values beyond which permanent damage to the device may occur.
Characteristics
Recovered Audio Output Voltage
Operating Current ( No signal )
Input Limiting Voltage
Total Harmonic Distortion
Drop Voltage AF Gain Loss
Detector Output Impedance
Filter Gain
Filter Output Voltage
Mute Function Low
Mute Function High
Scan Function Low
Scan Function High
Trigger Hysteresis
Mixer Conversion Gain
Mixer Input Resistance
Mixer Input Capacitance
Symbol
Icc_off
Icc_on
Test conditions
Squelch on ( V12=GND )
Squelch off ( V12=1V )
Spec.
2.0
2.5
3.5
4.2
5.2
6.2
Min
Typ
Max
Vout
Vin(lim)
Vin = 10mVrms
-3dB limiting
120
160
-
-
2.6
6.0
THD
Gv
Vcc = 4V -> 2V
-
0.86
-
-3.0
-0.6
-
Zout
Gflt
Vin = 0.3mVrms
-
550
-
40
50
-
Vflt
Rmute_L Squelch on ( V12 = GND )
0.5
0.7
0.9
-
45
-
Rmute_H
Vscan_L
Squelch off ( V12 = 1V )
Squelch off ( V12 = 1V )
-
11
-
-
0
0.4
Vscan_H
VTH
Squelch on ( V12 = GND )
Squelch on/off
3.0
3.8
-
-
50
-
Gmix
-
26
-
Ri
Ci
-
3.3
-
-
9.0
-
Units
mA
mA
rms
rms
%
dB
dB
Vdc
V
V
mV
dB
pF
GL3361
3
Test Circuit
Pin Descriptions
1
16
15
14
13
12
11
10
9
2
3
4
5
6
7
8
GL3361
20
k
Vcc
68pF
220
pF
10.245
MHz
FLT
0.1
0.1
0.1
Quad Coil
Mixer input
10.7MHz
0.01
51
Audio
Mute
Scan
Control
Squelch
SW
Input
10k
1.0
1.0
510
470k
8.2
k
0.01
Filter
Amp
Input
AF
Output
Filter
Amp
Output
C -
, unless noted
FLT - muRata Erie North America Type CFU455D2 or equivalent
Quadrature Coil - Toko America Type 7MC-8128Z or equivalent
No.
Symbol
Function
No.
Symbol
Function
1
OSC1
The base of the colpitts oscillator
9
AFOUT
Recovered audio output
2
OSC2
The emitter of the colpitts oscillator
10
FLTIN
Filter amplifier input
3
MIXOUT
Output of the Mixer
11
FLTOUT
Filter amplifier output
4
VCC
Supply voltage
12
SQIN
Squelch input
5
LIMIN
Input to the IF amplifier
13
SCAN
Scan control output
6
DEC1
IF decoupling
14
MUTE
Mute output
7
DEC2
IF decoupling
15
GND
Ground
8
QUAD
Quadrature tuning coil
16
MIXIN
Input of the Mixer
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