NE571 Philipss, NE571 Datasheet - Page 2

• Manufacturer Part Number: NE571
• Description: Compandor
• Manufacturer: Philipss

Philips Semiconductors
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
ORDERING INFORMATION
BLOCK DIAGRAM
1997 Aug 14
16-Pin Plastic Small Outline Large (SOL)
16-Pin Plastic Dual In-Line Package (DIP)
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
Compandor
DESCRIPTION
RECT IN
G IN
R2 20k
R1 10k
THD TRIM
Figure 2. Block Diagram
VARIABLE
RECTIFIER
GAIN
RECT CAP
2
R3
PIN CONFIGURATION
APPLICATIONS
TEMPERATURE RANGE
Cellular radio
High level limiter
Low level expandor—noise gate
Dynamic filters
CD Player
R3 20k
R4 30k 1.8V
NOTE:
1. SOL - Released in Large SO Package Only.
-40 to +85 C
-40 to +85 C
V
REF
INVERTER IN
AG CELL IN 1
RECT CAP 1
THD TRIM 1
OUTPUT 1
RECT IN 1
RES. R
INV. IN 1
–
+
Figure 1. Pin Configuration
GND
3
1
D, and N Packages
1
2
3
4
5
6
7
8
TOP VIEW
ORDER CODE
OUTPUT
SA571D
SA571N
16
15
14
13
12
11
10
9
1
RECT CAP 2
AG CELL IN 2
V
INV. IN 2
RES. R
OUTPUT 2
THD TRIM 2
RECT IN 2
CC
Product specification
3
853-0812 18285
2
SA571
SOT162-1
SOT38-4
DWG #
SR00675
SR00676