SA571 Datasheet, PDF (2/11 Pages) NXP Semiconductors – Compandor

Philips Semiconductors
Compandor
Product specification
SA571
DESCRIPTION
The SA571 is a versatile low cost dual gain control circuit in which
either channel may be used as a dynamic range compressor or
expandor. Each channel has a full-wave rectifier to detect the
average value of the signal, a linerarized temperature-compensated
variable gain cell, and an operational amplifier.
The SA571 is well suited for use in cellular radio and radio
communications systems, modems, telephone, and satellite
broadcast/receive audio systems.
FEATURES
• Complete compressor and expandor in one IChip
• Temperature compensated
• Greater than 110dB dynamic range
• Operates down to 6VDC
• System levels adjustable with external components
• Distortion may be trimmed out
• Dynamic noise reduction systems
• Voltage-controlled amplifier
ORDERING INFORMATION
DESCRIPTION
16-Pin Plastic Small Outline Large (SOL)
16-Pin Plastic Dual In-Line Package (DIP)
PIN CONFIGURATION
D, and N Packages¹
RECT CAP 1 ¹
RECT IN 1 ²
AG CELL IN 1 ³
GND ⁴
INV. IN 1 ⁵
RES. R₃ 1 6
OUTPUT 1 7
THD TRIM 1 8
16 RECT CAP 2
15 RECT IN 2
14 AG CELL IN 2
13 V_CC
12 INV. IN 2
11 RES. R₃ 2
10 OUTPUT 2
9 THD TRIM 2
TOP VIEW
NOTE:
1. SOL - Released in Large SO Package Only.
Figure 1. Pin Configuration
SR00675
APPLICATIONS
• Cellular radio
• High level limiter
• Low level expandor—noise gate
• Dynamic filters
• CD Player
TEMPERATURE RANGE
-40 to +85°C
-40 to +85°C
ORDER CODE
SA571D
SA571N
DWG #
SOT162-1
SOT38-4
BLOCK DIAGRAM
∆G IN
RECT IN
THD TRIM
R2 20k
VARIABLE
GAIN
R1 10k
RECTIFIER
R3
INVERTER IN
R3 20k
–
V_REF
R4 30k 1.8V
+
RECT CAP
Figure 2. Block Diagram
OUTPUT
SR00676
1997 Aug 14
2
853-0812 18285