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GL3361
GL3361
Low Power Narrow Band FM IF
Description
The GL3361 is designed for use in FM dual conversion
communications equipment. This device contains an Oscillator, 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§Å typical)
• Minimum Number of External Parts Required
• Full ESD Protection
• Package Type : 16 DIP/SOP
Block Diagram
IF
input GND Mute
16 15 14
Scan
control
13 12 11 10 9
Squelch
input
Pin Configurations
VCC
1
2
3
4
5
6
7
8
Filter
input
Audio
output
OSC1
OSC2
MIXOUT
LIMIN
DEC1
DEC2
QUAD
Filter
output
16
15
14
13
12
11
10
9
MIXIN
GND
MUTE
SCAN
SQIN
FLTOUT
FLTIN
AFOUT
-
Filter
Amp
+
Oscillator
1
Crystal OSC
Squelch Trigger with Hysteresis
Mixer
2 3 4 5
Mixer
output
Vcc Limiter
input
Limiter
Amp
6
Decoupling
The information in this document is subject to change without notice.
1
Demodulator
7
Amp
AF
8
Quad
coil
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Absolute Maximum Ratings (Ta=25¡É, unless otherwise noted)
Characteristics Pin
Symbol
Value
GL3361
Unit
Power Supply Voltage
Operating Supply Voltage Range
Operating Temperature Range
Storage Temperature Range
* Notice : Absolute maximum ratings are values beyond which permanent damage to the device may occur.
4
4
-
-
Vcc(max)
Vcc
Ta
Tstg
10
2.0 to 8.0
0 to +70
-65 to +150
Electrical Characteristics
( Vcc=4.0Vdc, fo=10.7MHz,¡âf=¡¾3kHz,fmod=1.0kHz,Ta=25¡É, unless otherwise noted )
Spec.
Characteristics
Operating Current ( No signal )
Recovered Audio Output Voltage
Input Limiting Voltage
Total Harmonic Distortion
Drop Voltage AF Gain Loss
Symbol
Icc_off
Icc_on
Vout
Vin(lim)
THD
¡âGv Vcc = 4V -> 2V
Test conditions
Squelch on ( V12=GND )
Squelch off ( V12=1V )
Vin = 10mVrms
-3dB limiting
Min Typ Max
2.0 2.5 3.5
4.2 5.2 6.2
120 160 -
- 2.6 6.0
- 0.86 -
-3.0 -0.6 -
Vdc
Vdc
¡É
¡É
Units
mA
mA
§Ærms
§Årms
%
dB
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
Zout
Gflt Vin = 0.3mVrms
Vflt
Rmute_L Squelch on ( V12 = GND )
Rmute_H
Vscan_L
Vscan_H
VTH
Gmix - 26 -
Ri
Ci
Squelch off ( V12 = 1V )
Squelch off ( V12 = 1V )
Squelch on ( V12 = GND )
Squelch on/off
- 550 -
40 50 -
0.5 0.7 0.9
- 45 -
- 11 -
- 0 0.4
3.0 3.8 -
- 50 -
- 3.3 -
- 9.0 -
2
§Ù
dB
Vdc
§Ù
§Û
V
V
mV
dB
§Ú
pF
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Pin Descriptions
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
Test Circuit
Mixer input
10.7MHz
Audio
Mute
Scan
Control
Squelch
SW
Input
Filter
Amp
Output
Filter
Amp
Input
AF
Output
GL3361
Vcc
51
0.01
10k
470k
1.0
1.0
510
16 15 14 13 12 11 10 9
GL3361
1
10.245MHz
68pF
2 3
220pF
FLT
4
5
6
0.1
7
0.1
0.01
8.2k
8
20k
Quad Coil
0.1
C - §Þ, unless noted
FLT - muRata Erie North America Type CFU455D2 or equivalent
Quadrature Coil - Toko America Type 7MC-8128Z or equivalent
3
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Application Circuit
GL3361
Vcc
RF input
51
0.01
16 15 14
10
SCAN
control
13
12
4.7
0.1
11
0.001
470k
100k
18k
1.0k
4.7k
0.047
AUDIO
output
10k
10
3.3k
0.001
9
3.3k6.8k
0.022
22k
1
68pF
10.245MHz
GL3361
2 3 4 5 6 7 8
220pF
FLT
0.1
FLT - muRata Erie North America Type CFU455D2 or equivalent
Quadrature Coil - Toko America Type 7MC-8128Z or equivalent
Units : R =§Ù
4
0.1
C = §Þ, unless noted
20k
Quad Coil
0.1
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