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Details, datasheet, quote on part number:SA578D
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Datasheet text preview:
RF COMMUNICATIONS PRODUCTS
SA578 Unity gain level programmable low power compandor
Product specification Replaces data of 1993 December 15 IC17 Data Handbook 1997 Nov 07
Philips Semiconductors
Philips Semiconductors
Product specification
Unity gain level programmable low power compandor
SA578
DESCRIPTION
The SA578 is a unity gain level programmable compandor designed for low power applications. The SA578 is internally configured as an expandor and a compressor to minimize external component count. The summing amplifiers of the SA578 have 600 drive capability and the inverting input of the compressor amplifier is accessible through Pin 9 for summing multiple external signals. Power Down/Mute function is active low and requires an open collector output logic configuration at Pin 8. If Power Down/Mute is not needed, Pin 8 should be left open. When the part is muted, supply current drops to 170mA at 3.6V.
PIN CONFIGURATION
D Package
GCELLIN RECTIN EXPCAP EXPOUT 1 2 3 4 16 15 14 13 12 11 V CC COMPCAP2 COMPIN COMPCAP1 RECTIN GCELLIN
VREF 5 IREF GND PWRDN/ MUTE 6 7 8
FEATURES
· Operating voltage range: 1.8V to 7V · Low power consumption (1.4mA @ 3.6V) · 0dB level programmable · Over 90dB of dynamic range · Wide input/output swing capability · Low external component count · SA578 meets cellular radio specifications · ESD hardened · Power Down mode (ICC = 170µA @ 3.6V) · Mute function · Multiple external summing capability · 600 drive capability
(10mVRMS to 1.0VRMS)
10 COMP OUT 9 SUM NODE
SR00719
Figure 1. Pin Configuration
APPLICATIONS
· High performance portable communications · Cellular radio · Cordless telephone · Consumer audio · Wireless microphones · Modems · Electric organs · Hearing aids · Automatic level control (ALC)
ORDERING INFORMATION
DESCRIPTION 16-Pin Plastic Small Outline (SO) TEMPERATURE RANGE 40 to +85°C ORDER CODE SA578D DWG # SOT109-1
ABSOLUTE MAXIMUM RATINGS
SYMBOL VCC TA TSTG JA Supply voltage Operating ambient temperature range Storage temperature range Thermal impedance SO PARAMETER RATING SA578 8 40 to +85 65 to +150 125 UNITS V
°C °C °C/W
1997 Nov 07
2
853-1537 18660
Philips Semiconductors
Product specification
Unity gain level programmable low power compandor
SA578
BLOCK DIAGRAM and TEST AND APPLICATION CIRCUIT
10k EXPIN C1 + 10µF R1* RECTIFIER RECTIN EXPCAP + C2 2.2µF C3 + EXPOUT 10µF VREF C4 + 10µF 10k 5k COMPCAP2 GAINCELL 10k
1
G
16
V CC
2
30k 30k 10k
15
C7
+
C8 2.2µF
3
EXPANDOR
14
+ 10µF COMPCAP1 COMPIN
4
10k 8.6k RECTIFIER
13
+ C6 2.2µF
5
VREF BANDGAP 10k V CC WRDN GND PMUTE COMPRESSOR G GAINCELL
12
RECTIN R3*
6
R2*
IREF
11
GCELLIN + C5 10µF
7
GND
10
R4 10k
+ C9 + 10µF
COMPOUT
PWRDN/ MUTE *R1, R2 and R3 are 1% resistors.
8
9
SUMIN C10 10µF
SR00720
Figure 2. Block Diagram and Test and Application Circuit
1997 Nov 07
3
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