GL 6551 GL 6551 COMPANDER Pin Configuration 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) FIL OUT 1 20 VCC FIL IN 2 19 EXP OUT COMP OUT 3 18 EXP RECT DATA IN 4 17 DATA OUT C-ACF 5 16 EXP NF COMP RECT 6 15 EXP IN COMP NF 7 14 EXP REF COMP IN 8 13 EXP MUTE COMP REF 9 12 11 THROUGH GND 10 COMP MUTE Maximum Ratings Parameter symbol Spec. Unit VCC, MAX 10 V PD.MAX 350 mW TSTG -5 ~ 125 ¡ É symbol Spec. Unit Operating Voltage VOP 2.4 ~ 7 V Operating Temperature TOP -30 ~ 70 ¡ É Supply Voltage Power Dissipation Storage Temperature Remark Operating Conditions Parameter 1 Remark 2 15 16 EXP IN EXP NF 6 8 COMP IN + 51K 17 10K 15K EXP RECT 18 RECTIFIER TH S/W GAIN CELL RECTIFIER 20K 20K TH S/W GAIN CELL 15K DATA RECT INPUTAMP + Ith MIC-AMP 100K To VREF 3.3K SUM AMP + 30K To VREF Ith EXP OUT 19 MUTE SUM AMP + − 30K EXPANDER COMPRESSOR To VREF 30K To VREF 13 + 100K 3 GND 10 REGULATOR 1 2 14 9 20 BUFFER AMP COMP IN COMP THROUGH EXP MUTE MUTE 12 S/W CONTROL 11 IDC MUTE 100K 100K 4 5 + − COMP RECT 7 COMP NF DATA IN C-ACF EXP REF COMP REF VCC FILTER OUT FILTER IN GL 6551 Block Diagram GL 6551 Ta=25¡ ,É Vcc=3.0V, f=1kHz, R1=10kΩ Electrical Characteristics ∗ PARAMETER SYMBOL 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 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 UNIT mA V 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 17 0.5 1.0 1.5 1.0 5.5 1.5 0.5 -30 KΩ mVrms dB dB dB % mVrms dB Vp-p dB mVrms dB -0.5 0 -3 - -60 - 0.02 550 700 0.5 0.1 - dB dB dB % mVrms 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 Measured by Noise Filter (CCITT Recommandation P. 53) 3 CONDITION No Signal 11, 12, 13 Pin Voc=30mVrms, Vin=0dB∗ Vin=-20dB ∗ Vin=-40dB ∗ Vin=-0dB, Pin12=0V∗ Vin=0dB Rg=620Ω ∗ Vin=0dB, Pin11=0V ∗ Pin4=300mVrms THD=10% Point ExpVin=30mVrms,Rg=620Ω ∗ 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=620Ω ∗ DB Vin=0dB, Pin13=0V ∗ - mVrms THD 10% Point 16.5 DB Vin=0dB - mVrms THD=10% Point -60 DB CompVin=Vinc,Rg=620Ω ∗ GL 6551 NO SYMBOL FUNCTION 1 FILTER OUT 2 FILTER IN 3 COMP OUT 4 DATA IN 5 C-ACF 6 COMP RECT 7 COMP NF 8 COMP IN 9 COMP REF 10 GND 11 COMP MUTE 12 THROUGH 13 EXP MUTE 14 EXP REF 15 EXP IN Expander Input Amp (+) Input Terminal. 16 EXP NF Expander Input Amp (-) Input Terminal. 17 DATA OUT 18 EXP RECT 19 EXP OUT 20 Vcc 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. Rectifing capacitor external connect Terminal. Determine Attack time and Recovery time of Expander by Capacitance. Expander Output Terminal. Power Supply. 4 5 6.8n 10K To VREF (PIN 9) 100K 1µ 10 10K 100 1n 2.2¥ì + 47¥ì 16 15 6 8 7 + 51K 1¥ì 17 GAIN 20K TH S/W CELL GAIN CELL 10K 18 + 2.2¥ì RECTIFIER TH S/W 20K RECTIFIER 15K 15K DATA OUT AMP INPUTAMP + Ith MIC-AMP 100K To VREF 3.3K AMP SUM AMP 30K Ith To VREF MUTE COMP Exp OUT + 1¥ì 19 AMPMUTE SUM 30K EXPANDER To VREF 100K 100K 4 100K THROUGH 12 3 1 2 10 REGULATOR 14 9 20 BUFFER AMP Exp MUTE 13 S/W CONTROL 11 IDC MUTE COMPRESSOR To VREF 30K 5 100n + − Exp IN Comp IN 470n ¥ì DATA IN V REF B V REF C + 4.7 ¥ì + 4.7 ¥ì 1n 10K 6.8n VCC Filter OUT + 1¥ì 10K 10K GL 6551 Application Circuit