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GL 6551
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.
* 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
FIL OUT FIL IN COMP OUT DATA IN C-ACF COMP RECT COMP NF COMP IN COMP REF GND
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
VCC EXP OUT EXP RECT DATA OUT EXP NF EXP IN EXP REF EXP MUTE THROUGH COMP MUTE
Features
Maximum Ratings
Parameter Supply Voltage Power Dissipation Storage Temperature symbol VCC, MAX PD.MAX TSTG Spec. 10 350 -5 ~ 125 Unit V mW E Remark
Operating Conditions
Parameter Operating Voltage Operating Temperature symbol VOP TOP Spec. 2.4 ~ 7 -30 ~ 70 Unit V E Remark
1
Block Diagram
C-ACF
DATA IN
COMP IN
5
30K 30K 100K 15K 100K MUTE 100K
4
3
COMP NF
7 2
+ - +
3.3K
51K
COMP IN GAIN CELL SUM AMP To VREF IDC To VREF TH S/W 15K RECTIFIER 20K
8
+ +
FILTER IN
100K
MIC-AMP
To VREF
1
BUFFER AMP
FILTER OUT
Ith
COMPRESSOR EXPANDER
30K
2
20K GAIN CELL - + TH S/W SUM AMP To VREF Ith MUTE S/W CONTROL 10K RECTIFIER
COMP RECT
6
20
REGULATOR
VCC
EXP IN
15
9 14
COMP REF
+
EXP NF
16 17
EXP RECT
INPUTAMP
EXP REF
18
19
EXP OUT
11
12
13
COMP THROUGH EXP MUTE MUTE
10
GND
DATA RECT
GL 6551
GL 6551 Electrical Characteristics
PARAMETER Current Dissipation Threshold Voltage Compressor Input impedance Input Reference Level Gain Deviation (1) Gain Deviation (2) Through ON OFF Diff. T.H.D Output Noise Voltage Mute Attenuation Limiting Voltage Data Pin Voltage Gain Data Pin Max. Output Cross Talk Buffer Amp (LPF) Voltage Gain Freq. Charact (1) Freq. Charact (2) T.H.D. Maximum Output Voltage Expander Output Reference Volt. Gain Deviation (1) Gain Deviation (2) Gain Deviation (3) Through ON OFF Diff. T.H.D Output Noise Voltage Mute Attenuation Maximum Output Voltage Input Amp Voltage Gain Input Amp Max. Voltage Cross Talk
Ta=25 , Vcc=3.0V, f=1kHz, R1=10k E
SYMBOL Icc Vth Zinc Vinc Gc1 Gc2 Gtc THDc Vnc Attc Vlimc Gdata VDmax CTc Gb f1 f2 THDb VBmax Voe Ge1 Ge2 Ge3 Gte THDe Vne VEmax Gi VImax CTe SPEC. MIN TYP MAX - 4.0 6.5 0.9 1.15 1.30 90 120 8 12.5 -0.5 0 -1.0 0 -1.5 0 - 0.5 - 3.0 60 80 1.15 1.35 -0.5 0 800 900 - -35 -0.5 0 -3 - -60 - 0.02 550 700 110 130 -0.5 0 -1.0 0 -1.5 0 -2.5 -1 - 0.5 10 60 80 700 800 14.5 15.5 450 500 - -70 17 0.5 1.0 1.5 1.0 5.5 1.5 0.5 -30 0.5 0.1 UNIT mA V K mVrms dB dB dB % mVrms dB Vp-p dB mVrms dB dB dB dB % mVrms CONDITION No Signal 11, 12, 13 Pin
Voc=30mVrms, Vin=0dB Vin=-20dB Vin=-40dB Vin=-0dB, Pin12=0V Vin=0dB Rg=620 Vin=0dB, Pin11=0V Pin4=300mVrms THD=10% Point ExpVin=30mVrms,Rg=620 Vin=300mVrms Vin=300mVrms, f=3kHz Vin=300mVrms, f=30kHz Vin=300mVrms THD=10% Point
160 mVrms Vin=300mVrms=0dB 0.5 DB Vin=-10dB 1.0 DB Vin=-20dB 2.0 DB Vin=-30dB 0.5 DB Vin=0dB , Pin12=0V 1.5 % Vin=0dB 30 uVrms Rg=620 DB Vin=0dB, Pin13=0V - mVrms THD 10% Point 16.5 DB Vin=0dB - mVrms THD=10% Point -60 DB CompVin=Vinc,Rg=620
Measured by Noise Filter (CCITT Recommandation P. 53)
3
GL 6551
NO 1 2 3 4 SYMBOL FILTER OUT FILTER IN COMP OUT DATA IN Filter Amp Output Terminal. Filter Amp (+) Input Terminal. Make a various kinds Filters. Compressor Output Terminal. 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) Coupling capacitor connect Terminal. Determined Low cutoff frequency of Compressor block by capacitance. Rectifing Capacitor external connect Terminal. Determined Recovery time and Attack time of Compressor by Capacitance. 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. Compressor Mic Amp (+) Input Terminal. Same potential with COMP REF (Pin 9). Reference voltage of Compressor Internal Amp Output Terminal. Ground Terminal. "L" state - Compressor Output Mute. Input signal of Data In terminal is output to COMP OUT (Pin3). "H" state - open. "L"state - Compressor and Expander Logalithm 1 (Constant Gain) "H" state - open. "L" state = Expander Output is muting. Data out to DATA OUT (Pin 17) Terminal. "H" state - open. Reference voltage of Expander Internal Amp output Terminal. Expander Input Amp (+) Input Terminal. Expander Input Amp (-) Input Terminal. Expander Input Amp Input Terminal. Rectifing capacitor external connect Terminal. Determine Attack time and Recovery time of Expander by Capacitance. Expander Output Terminal. Power Supply. FUNCTION
5
C-ACF
6
COMP RECT
7 8 9 10 11 12 13 14 15 16 17 18 19 20
COMP NF COMP IN COMP REF GND COMP MUTE THROUGH EXP MUTE EXP REF EXP IN EXP NF DATA OUT EXP RECT EXP OUT Vcc
4
Application Circuit
DATA IN
i
100n
5 4
30K 100K 15K MUTE GAIN 20K 100K 100K 10K 10K
3
10K
470n 3.3K 51K 30K
100
7 + 2
1n
+ 47i
8
Comp IN
100K SUM AMP MIC-AMP
CELL To VREF
TH S/W
6.8n + 1i
+ -
AMP To VREF
IDC
To VREF
Ith RECTIFIER 15K
1
BUFFER AMP Filter OUT
COMPRESSOR EXPANDER
30K
Exp IN
5
20K GAIN CELL SUM
2.2i
6
20
REGULATOR + 4.7 i
VCC 9
V REF C + 4.7 i
1
10K
10K
15 +
TH S/W
6.8n
100K INPUTAMP RECTIFIER 10K Ith
10
1n
To VREF AMP MUTE 19
+ 2.2i + 1i COMP MUTE
16 AMP 17 18
S/W CONTROL
14
V REF B
To VREF (PIN 9) 1i
11
12
13
10
Exp MUTE
THROUGH DATA OUT Exp OUT
GL 6551

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