SA572 Datasheet, PDF (2/12 Pages) NXP Semiconductors – Programmable analog compandor

Philips Semiconductors
Programmable analog compandor
Product specification
SA572
DESCRIPTION
The SA572 is a dual-channel, high-performance gain control circuit
in which either channel may be used for dynamic range
compression or expansion. Each channel has a full-wave rectifier to
detect the average value of input signal, a linearized,
temperature-compensated variable gain cell (∆G) and a dynamic
time constant buffer. The buffer permits independent control of
dynamic attack and recovery time with minimum external
components and improved low frequency gain control ripple
distortion over previous compandors.
The SA572 is intended for noise reduction in high-performance
audio systems. It can also be used in a wide range of
communication systems and video recording applications.
FEATURES
• Independent control of attack and recovery time
• Improved low frequency gain control ripple
• Complementary gain compression and expansion with
external op amp
• Wide dynamic range—greater than 110dB
• Temperature-compensated gain control
• Low distortion gain cell
• Low noise—6µV typical
• Wide supply voltage range—6V-22V
• System level adjustable with external components
ORDERING INFORMATION
DESCRIPTION
16-Pin Plastic Small Outline (SOL)
16-Pin Plastic Dual In-Line Package (DIP)
ABSOLUTE MAXIMUM RATINGS
SYMBOL
PARAMETER
V_CC
Supply voltage
Operating temperature range
T_A
SA572
P_D
Power dissipation
PIN CONFIGURATION
D¹, N, Packages
TRACK TRIM A ¹
RECOV. CAP A ²
RECT. IN A ³
ATTACK CAP A ⁴
∆G OUT A ₅
THD TRIM A ⁶
∆G IN A ₇
GND ⁸
16 V_CC
15 TRACK TRIM B
14 _{RECOV. CAP B}
13 RECT. IN B
12 ATTACK CAP B
11 ^{∆G OUT B}
10 _{THD TRIM B}
9 ^{∆G IN B}
NOTE:
1. D package released in large SO (SOL) package only.
SR00694
Figure 1. Pin Configuration
APPLICATIONS
• Dynamic noise reduction system
• Voltage control amplifier
• Stereo expandor
• Automatic level control
• High-level limiter
• Low-level noise gate
• State variable filter
TEMPERATURE RANGE
–40 to +85°C
–40 to +85°C
ORDER CODE
SA572D
SA572N
DWG #
SOT162-1
SOT38-4
RATING
22
–40 to +85
500
UNIT
V_DC
°C
mW
1998 Nov 03
2
853-0813 20294