SA578 Datasheet, PDF (2/7 Pages) NXP Semiconductors – Unity gain level programmable low power compandor

Philips Semiconductors
Unity gain level programmable low power compandor
Product specification
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 600Ω 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.
FEATURES
• Operating voltage range: 1.8V to 7V
• Low power consumption (1.4mA @ 3.6V)
• 0dB level programmable
(10mV_RMS to 1.0V_RMS)
• Over 90dB of dynamic range
• Wide input/output swing capability
• Low external component count
• SA578 meets cellular radio specifications
• ESD hardened
• Power Down mode (I_CC = 170µA @ 3.6V)
• Mute function
• Multiple external summing capability
• 600Ω drive capability
PIN CONFIGURATION
D Package
GCELL_IN 1
RECT_IN ²
EXP_CAP ³
EXP_OUT ⁴
V_REF 5
I_REF ⁶
GND 7
PWRDN/
MUTE
8
16 _VCC
15 COMP_CAP2
14 COMP_IN
13 COMP_CAP1
12 _RECTIN
11 GCELL_IN
10 _COMPOUT
9 SUM NODE
Figure 1. Pin Configuration
SR00719
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
V_CC
T_A
T_STG
θ_JA
PARAMETER
Supply voltage
Operating ambient temperature range
Storage temperature range
Thermal impedance
SO
RATING
SA578
8
–40 to +85
–65 to +150
125
UNITS
V
°C
°C
°C/W
1997 Nov 07
2
853-1537 18660