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SA572DR2

P1-P3P4-P6P7-P9P10-P12
© Semiconductor Components Industries, LLC, 2006
March, 2006 − Rev. 2
1 Publication Order Number:
SA572/D
SA572
Programmable Analog
Compandor
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 110 dB
• Temperature-Compensated Gain Control
• Low Distortion Gain Cell
• Low Noise − 6.0 V Typical
• Wide Supply Voltage Range − 6.0 V-22 V
• System Level Adjustable with External Components
• Pb−Free Packages are Available*
Applications
• Dynamic Noise Reduction System
• Voltage Control Amplifier
• Stereo Expandor
• Automatic Level Control
• High-Level Limiter
• Low-Level Noise Gate
• State Variable Filter
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques Reference
Manual, SOLDERRM/D.
http://onsemi.com
See detailed ordering and shipping information in the package
dimensions section on page 10 of this data sheet.
ORDERING INFORMATION
PIN CONNECTIONS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
16
15
D, N, DTB Packages*
TRACK TRIM A
RECOV. CAP A
RECT. IN A
ATTACK CAP A
THD TRIM A
GND
G OUT A
G IN A
TRACK TRIM B
RECOV. CAP B
RECT. IN B
ATTACK CAP B
THD TRIM B
G OUT B
G IN B
V
CC
*D package released in large SO (SOL) package only.
PDIP−16
N SUFFIX
CASE 648
16
1
16
SOIC−16 WB
D SUFFIX
CASE 751G
1
MARKING DIAGRAMS
16
1
SA572D
AWLYYWWG
16
1
SA572N
AWLYYWWG
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
G or G = Pb−Free Package
16
1
SA
572
ALYW G
G
TSSOP−16
DTB SUFFIX
CASE 948F
16
1
http://onsemi.com
(Note: Microdot may be in either location)
SA572
http://onsemi.com
2
(7,9)
(6,10)
(3,13)
(16)
(8) (4,12) (2,14)
(1,15)
(5,11)
GAIN CELL
RECTIFIER
P.S.
BUFFER
270
500
Ω
Ω
G
−
+
−
+
Figure 1. Block Diagram
6.8k
10k
10k
R
1
PIN FUNCTION DESCRIPTION
Pin Symbol Description
1 TRACK TRIM A Tracking Trim A
2 RECOV. CAP A Recovery Capacitor A
3 RECT. IN A Rectifier A Input
4 ATTACK CAP A Attack Capacitor A
5 G OUT A Variable Gain Cell A Output
6 THD TRIM A Total Harmonic Distortion Trim A
7 G IN A Variable Gain Cell A Input
8 GND Ground
9 G IN B Variable Gain Cell B Input
10 THD TRIM B Total Harmonic Distortion Trim B
11 G OUT B Variable Gain Cell B Output
12 ATTACK CAP B Attack Capacitor B
13 RECT. IN B Rectifier B Input
14 RECOV. CAP B Recovery Capacitor B
15 TRACK TRIM B Tracking Trim B
16 V
CC
Positive Power Supply
SA572
http://onsemi.com
3
MAXIMUM RATINGS
Rating Symbol Value Unit
Supply Voltage V
CC
22 V
DC
Operating Temperature Range T
A
−40 to +85 °C
Operating Junction Temperature T
J
150 °C
Power Dissipation P
D
500 mW
Thermal Resistance, Junction−to−Ambient N Package
D Package
DTB Package
R
JA
75
105
133
°C/W
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
DC ELECTRICAL CHARACTERISTICS Standard test conditions, V
CC
= 15 V, T
A
= 25°C; Expandor mode (see Test Circuit). Input
signals at unity gain level (0 dB) = 100 mV
RMS
at 1.0 kHz; V
1
= V
2
; R
2
= 3.3 k; R
3
= 17.3 k unless otherwise noted.
Characteristic Symbol Test Conditions Min Typ Max Unit
Supply Voltage V
CC
− 6.0 − 22 V
DC
Supply Current I
CC
No Signal − − 6.3 mA
Internal Voltage Reference V
R
− 2.3 2.5 2.7 V
DC
Total Harmonic Distortion (Untrimmed)
Total Harmonic Distortion (Trimmed)
Total Harmonic Distortion (Trimmed)
THD
THD
THD
1.0 kHz, C
A
= 1.0 F
1.0 kHz, C
R
= 10 F
100 Hz
−
−
−
0.2
0.05
0.25
1.0
−
−
%
%
%
No Signal Output Noise Input to V
1
and V
2
grounded (20−20 kHz)
− 6.0 25 V
DC Level Shift (Untrimmed) Input change from no
signal to 100 mV
RMS
− "20 "50 mV
Unity Gain Level − −1.5 0 +1.5 dB
Large-Signal Distortion V
1
= V
2
= 400 mV − 0.7 3.0 %
Tracking Error
(Measured relative to value at unity gain) =
[V
O
−V
O
(unity gain)] dB−V
2
dB
Rectifier Input
V
2
= +6.0 dB, V
1
= 0 dB
V
2
= −30 dB, V
1
= 0 dB
−
−
"0.2
"0.5 −2.5, +1.6
dB
dB
Channel Crosstalk 200 mV
RMS
into
channel A, measured
output on channel B
60 − − dB
Power Supply Rejection Ratio PSRR 120 Hz − 70 − dB
Figure 2. Test Circuit
BUFFER
RECTIFIER
NE5234
+15V
−15V
(7,9)
(2,14)
(4,12)
(5,11)
(6,10)
(8)
(1,15)
(16)
(3,13)
G
V
1
V
2
V
0
270pF
2.2k
1%
2.2F
22F
2.2F
22F
0.1F
1F
2.2F
5
C
R
= 10F
R
3
1%
R
2
100
+
+
+
+
−
6.8k
3.3k
82k
1k
17.3k
C
A
= 1F
P1-P3P4-P6P7-P9P10-P12

SA572DR2

Mfr. #:
Buy SA572DR2
Manufacturer:
ON Semiconductor
Description:
Audio Amplifiers Dual Channel Hi Perf
Lifecycle:
New from this manufacturer.
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