GL 6551
1
GL 6551
COMPANDER
Description
The GL6551 is a compander IC to expand
dynamic range at transmission/reception
systems and to improve the tone quality by
means of restricting noise. Two functions are
loaded on the IC, the one is the compressor
which has the 2/1 ratio of input/output ratio by
logarithm, and the expander which has the 1/w
ratio input/ output ratio by logarithm. The
GL6551equipped with input & filter Amp,
DATA IN OUT terminal. The GL6551 is well
suited for use in cellular radio MCA and handy
telephone set, radio communication systems.
Features
Low operating supply voltage.
Equipped with mute function and through function.
Equipped with compressor MIC Amp and Expander
INPUT Amp
Equipped with Filter Buffer Amp
Equipped with DATA IN OUT terminal.
Operation Voltage (2.4 ~ 7.0V)
Total gain (10~ 100dB)
Pin Configuration
Maximum Ratings
Parameter
symbol
Spec.
Unit
Remark
Supply Voltage
V
CC, MAX
10
V
Power Dissipation
P
D.MAX
350
mW
Storage Temperature
T
STG
-5 ~ 125
Operating Conditions
Parameter
symbol
Spec.
Unit
Remark
Operating Voltage
V
OP
2.4 ~ 7
V
Operating Temperature
T
OP
-30 ~ 70
COMP OUT
COMP RECT
COMP REF
FIL OUT
FIL IN
VCC
EXP OUT
DATA IN
C-ACF
EXP RECT
DATA OUT
COMP NF
EXP NF
COMP IN
GND
EXP IN
EXP REF
EXP MUTE
THROUGH
COMP MUTE
1
2
4
3
5
6
7
9
8
18
10
20
19
17
16
15
13
11
12
14
GL 6551
3
Electrical Characteristics Ta=25
, Vcc=3.0V, f=1kHz, R1=10k
SPEC.
PARAMETER
SYMBOL
MIN TYP MAX
UNIT
CONDITION
Current Dissipation
I
cc
- 4.0 6.5 mA No Signal
Threshold Voltage
Vth
0.9 1.15 1.30
V
11, 12, 13 Pin
Compressor
Input impedance
Zinc
90 120
- K
Input Reference Level
Vinc
8 12.5
17 mVrms Voc=30mVrms, Vin=0dB
Gain Deviation (1)
Gc1
-0.5
0 0.5
dB
Vin=-20dB
Gain Deviation (2)
Gc2
-1.0
0 1.0
dB
Vin=-40dB
Through ON OFF Diff.
Gtc
-1.5
0 1.5
dB
Vin=-0dB, Pin12=0V
T.H.D
THDc
- 0.5 1.0
%
Vin=0dB
Output Noise Voltage
Vnc
- 3.0 5.5 mVrms Rg=620
Mute Attenuation
Attc
60 80
-
dB
Vin=0dB, Pin11=0V
Limiting Voltage
Vlimc
1.15 1.35 1.5 Vp-p
Data Pin Voltage Gain
Gdata
-0.5
0 0.5
dB
Pin4=300mVrms
Data Pin Max. Output
VDmax
800 900
- mVrms THD=10% Point
Cross Talk
CTc
- -35 -30
dB
ExpVin=30mVrms, Rg=620
Buffer Amp (LPF)
Voltage Gain
Gb
-0.5
0 0.5
dB
Vin=300mVrms
Freq. Charact (1)
f1
-
-3
-
dB
Vin=300mVrms, f=3kHz
Freq. Charact (2)
f2
- -60
-
dB
Vin=300mVrms, f=30kHz
T.H.D.
THDb
- 0.02 0.1
%
Vin=300mVrms
Maximum Output Voltage VBmax
550 700
- mVrms THD=10% Point
Expander
Output Reference Volt.
Voe
110 130 160 mVrms Vin=300mVrms=0dB
Gain Deviation (1)
Ge1
-0.5
0 0.5 DB Vin=-10dB
Gain Deviation (2)
Ge2
-1.0
0 1.0 DB Vin=-20dB
Gain Deviation (3)
Ge3
-1.5
0 2.0 DB Vin=-30dB
Through ON OFF Diff.
Gte
-2.5
-1 0.5 DB Vin=0dB , Pin12=0V
T.H.D
THDe
- 0.5 1.5
%
Vin=0dB
Output Noise Voltage
Vne
- 10
30 uVrms Rg=620
Mute Attenuation
VEmax
60 80
- DB Vin=0dB, Pin13=0V
Maximum Output Voltage
Gi
700 800
- mVrms THD 10% Point
Input Amp Voltage Gain
VImax 14.5 15.5 16.5 DB Vin=0dB
Input Amp Max. Voltage
CTe
450 500
- mVrms THD=10% Point
Cross Talk
- -70 -60 DB CompVin=Vinc,Rg=620
Measured by Noise Filter (CCITT Recommandation P. 53)
GL 6551
4
NO
SYMBOL
FUNCTION
1
FILTER OUT Filter Amp Output Terminal.
2
FILTER IN
Filter Amp (+) Input Terminal.
Make a various kinds Filters.
3
COMP OUT Compressor Output Terminal.
4
DATA IN
Connected to (-) Input terminal of Compressor Output Amp
through resistor
Signal which is input to this terminal is output to COMP OUT
(Pin3). (not compress)
5
C-ACF
Coupling capacitor connect Terminal.
Determined Low cutoff frequency of Compressor block by capacitance.
6
COMP RECT
Rectifing Capacitor external connect Terminal.
Determined Recovery time and Attack time of Compressor by
Capacitance.
7
COMP NF
Input resistor and decoupling capacitor of Compressor Mic Amp
external connect Terminal. Determined Mic Amp Gain by resistor.
Max gain condition is not connect resistor.
8
COMP IN
Compressor Mic Amp (+) Input Terminal.
Same potential with COMP REF (Pin 9).
9
COMP REF Reference voltage of Compressor Internal Amp Output Terminal.
10
GND
Ground Terminal.
11 COMP MUTE
"L" state Compressor Output Mute.
Input signal of Data In terminal is output to COMP OUT (Pin3).
"H" state open.
12
THROUGH
"L"state Compressor and Expander Logalithm 1 (Constant Gain)
"H" state open.
13
EXP MUTE
"L" state = Expander Output is muting.
Data out to DATA OUT (Pin 17) Terminal.
"H" state open.
14
EXP REF
Reference voltage of Expander Internal Amp output Terminal.
15
EXP IN
Expander Input Amp (+) Input Terminal.
16
EXP NF
Expander Input Amp (-) Input Terminal.
17
DATA OUT Expander Input Amp Input Terminal.
18
EXP RECT
Rectifing capacitor external connect Terminal.
Determine Attack time and Recovery time of Expander by
Capacitance.
19
EXP OUT
Expander Output Terminal.
20
Vcc
Power Supply.
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