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GL3361
GL3361
Low Power Narrow Band FM IF
Description
Pin Configurations
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.
OSC1 1
OSC2 2
Features
• Operating Voltage : 2.0 ~ 8.0 V
MIXOUT 3
• Low Power Consumption (2.6mA typical @ Vcc=4.0Vdc) VCC 4
• Excellent Input Sensitivity (-3dB limiting=2.6§ Åtypical) LIMIN 5
• Minimum Number of External Parts Required
• Full ESD Protection
DEC1 6
• Package Type : 16 DIP/SOP
DEC2 7
QUAD 8
16 MIXIN
15 GND
14 MUTE
13 SCAN
12 SQIN
11 FLTOUT
10 FLTIN
9 AFOUT
Block Diagram
IF
input
16
GND
15
Mute
14
Scan Squelch Filter
control input output
13 12 11
Filter
input
10
Audio
output
9
Squelch Trigger with Hysteresis
Filter
Amp
-
+
Demodulator
Mixer
Limiter
Amp
Oscillator
12
Crystal OSC
3
Mixer
output
4
Vcc
5
Limiter
input
67
Decoupling
8
Quad
coil
The information in this document is subject to change without notice.
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GL3361
Absolute Maximum Ratings (Ta=25¡ É, unless otherwise noted)
Characteristics
Pin Symbol
Value
Unit
Power Supply Voltage
4 Vcc(max)
10
Vdc
Operating Supply Voltage Range
4 Vcc
2.0 to 8.0
Vdc
Operating Temperature Range
- Ta
0 to +70
¡É
Storage Temperature Range
- Tstg
-65 to +150
¡É
* Notice : Absolute maximum ratings are values beyond which permanent damage to the device may occur.
Electrical Characteristics
( Vcc=4.0Vdc, fo=10.7MHz,¡ âf=¡ ¾3kHz,fmod=1.0kHz,Ta=25¡ É, unless otherwise noted )
Characteristics
Symbol
Test conditions
Spec.
Units
Min Typ Max
Icc_off Squelch on ( V12=GND ) 2.0 2.5 3.5 mA
Operating Current ( No signal )
Icc_on Squelch off ( V12=1V ) 4.2 5.2 6.2 mA
Recovered Audio Output Voltage Vout
Vin = 10mVrms
120 160
- § Ærms
Input Limiting Voltage
Vin(lim)
-3dB limiting
- 2.6 6.0 § Årms
Total Harmonic Distortion
Drop Voltage AF Gain Loss
Detector Output Impedance
THD
¡ âGv
Zout
Vcc = 4V -> 2V
- 0.86 -
%
-3.0 -0.6 - dB
- 550 - § Ù
Filter Gain
Gflt
Vin = 0.3mVrms
40 50
- dB
Filter Output Voltage
Vflt
0.5 0.7 0.9 Vdc
Mute Function Low
Mute Function High
Rmute_L Squelch on ( V12 = GND ) - 45 - § Ù
Rmute_H Squelch off ( V12 = 1V )
-
11
- §Û
Scan Function Low
Vscan_L Squelch off ( V12 = 1V )
-
0 0.4 V
Scan Function High
Vscan_H Squelch on ( V12 = GND ) 3.0 3.8 - V
Trigger Hysteresis
VTH
Squelch on/off
- 50 - mV
Mixer Conversion Gain
Mixer Input Resistance
Gmix
Ri
- 26 - dB
- 3.3 - § Ú
Mixer Input Capacitance
Ci
- 9.0 - pF
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GL3361
Pin Descriptions
No. Symbol
1 OSC1
2 OSC2
3 MIXOUT
4 VCC
5 LIMIN
6 DEC1
7 DEC2
8 QUAD
Function
The base of the colpitts oscillator
The emitter of the colpitts oscillator
Output of the Mixer
Supply voltage
Input to the IF amplifier
IF decoupling
IF decoupling
Quadrature tuning coil
No. Symbol
9 AFOUT
10 FLTIN
11 FLTOUT
12 SQIN
13 SCAN
14 MUTE
15 GND
16 MIXIN
Function
Recovered audio output
Filter amplifier input
Filter amplifier output
Squelch input
Scan control output
Mute output
Ground
Input of the Mixer
Test Circuit
Mixer input
10.7MHz
51
Audio
Mute
Scan
Control
Squelch
SW
Input
Filter
Amp
Output
Filter
Amp
Input
AF
Output
10k 0.01
470k
16 15 14 13 12 11 10
9
GL3361
12345678
68pF
Vcc
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
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Application Circuit
Vcc
SCAN
control
GL3361
RF input
51
0.001
4.7k
3.3k
6.8k 3.3k
470k
16 15 14 13 12 11 10
9
GL3361
AUDIO
output
12345678
68pF
Quad Coil
0.1
FLT - muRata Erie North America Type CFU455D2 or equivalent
Quadrature Coil - Toko America Type 7MC-8128Z or equivalent
Units : R =§ Ù
C = § Þ, unless noted
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