Datasheet

UNISONIC TECHNOLOGIES CO., LTD
USA575
Preliminary
LINEAR INTEGRATED CIRCUIT
LOW VOLTAGE COMPANDOR

DESCRIPTION
The UTC USA575 is a precision dual gain control circuit
designed for low voltage applications. The UTC USA575’s
channel 1 is an expandor, while channel 2 can be configured
either for expandor, compressor, or automatic level controller
(ALC) application.

FEATURES
* Operating voltage range from 3V to 7V
* Reference voltage of 100mVRMS=0dB
* 600Ω drive capability
* One dedicated summing op amp per channel and two extra
uncommitted op amps
* Single or split supply operation
* Wide input/output swing capability

ORDERING INFORMATION
Ordering Number
USA575G-R20-R

Package
SSOP-20
Packing
Tape Reel
MARKING
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USA575

Preliminary
PIN CONFIGURATION
+VIN1
1
20 VCC
-VIN1
2
19 +VIN2
VOUT
3
18 -VIN2
RECT. IN1
4
17 VOUT2
CRECT1
5
16 RECT.IN2
SUM OUT 1 6
COMP. IN1 7
VREF
8
GAIN CELL IN1 9
GND 10

LINEAR INTEGRATED CIRCUIT
15 CRECT2
14 SUM OUT2
13 COMP.IN2
12 SUM NODE 2
11 GAIN CELL IN2
PIN DESCRIPTION
PIN NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
PIN NAME
+VIN1
-VIN1
VOUT
RECT. IN1
CRECT1
SUM OUT1
COMP. IN1
VREF
GAIN CELL IN1
GND
GAIN CELL IN2
SUM NODE 2
COMP. IN2
SUM OUT2
CRECT2
RECT. IN2
VOUT2
-VIN2
+VIN2
VCC
DESCRIPTION
Non-Inverted Input 1
Inverted Input 1
Output
Rectifier 1 Input
External Capacitor Pinout for Rectifier 1
Summation Output 1
Compensator Pin
Voltage Reference
Variable Gain Cell Input 1
Ground
Variable Gain Cell Input 2
Summation Node 2
Compensator Pin
Summation Output 2
External Capacitor Pinout for Rectifier 2
Rectifier 2 Input
Output 2
Inverted Input 2
Non-Inverted Input 2
Positive Power Supply
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USA575

Preliminary
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
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USA575

Preliminary
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
Single Supply Voltage
VCC
-0.3 ~ 8
V
Voltage Applied to Any Other Pin
VIN
-0.3 ~ (VCC+0.3)
V
Operating Ambient Temperature Range
TA
-40 ~ +85
°C
Storage Temperature Range
TSTG
-65 ~ +150
°C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.

THERMAL DATA
PARAMETER
Junction to Ambient

SYMBOL
θJA
RATINGS
117
UNIT
°C/W
ELECTRICAL CHARACTERISTICS
(Typical values are at TA=25°C. Minimum and Maximum values are for the full operating temperature range:
-40~+85°C, except SSOP package is tested at +25°C only. VCC=5V, unless otherwise stated. Both channels are
tested in the expandor mode)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
FOR COMPANDOR, INCLUDING SUMMING AMPLIFIER
Supply Voltage (Note 1)
VCC
3
5
7
V
Supply Current
ICC
No Signal
3
4.2
5.5
mA
Reference Voltage (Note 2)
VREF
VCC=5V
2.4
2.5
2.6
V
Summing Amp Output Load
RL
10
kΩ
Total Harmonic Distortion
THD
1kHz,0dB BW=3.5kHz
0.12
1.5
%
Output Voltage Noise
ENO
BW=20kHz,RS=0Ω
6
30
µV
Unity Gain Level
0dB
1kHz
-1.5
1.5
dB
Output Voltage Offset
VOS
No Signal
-150
150
mV
Output DC Shift
No Signal to 0dB
-100
100
mV
Gain Cell Input=0dB, 1kHz
-1.0
1.0
dB
Rectifier Input=6dB, 1kHz
Tracking Error Relative to 0dB
Gain Cell Input=0dB, 1kHz
-1.0
1.0
dB
Rectifier Input=-30dB, 1kHz
Crosstalk
1kHz, 0dB, CREF=220µF
-80
-65
dB
FOR OPERATIONAL AMPLIFIER
Output Swing
VO
RL=10kΩ
VCC-0.4 VCC
V
Output Load
RL
1kHz
600
Ω
Input Common-Mode Range
CMR
0
VCC
V
Common-Mode Rejection Ratio
CMRR
60
80
dB
Input Bias Current
IB
VIN=0.5V~4.5V
-1
1
µA
Input Offset Voltage
VOS
3
mV
Open-Loop Gain
AVOL
RL=10kΩ
80
dB
Slew Rate
SR
Unity Gain
1
V/µs
Bandwidth
GBW
Unity Gain
3
MHz
Input Voltage Noise
ENI
BW=20kHz
2.5
µV
Power Supply Rejection Ratio
PSRR
1kHz, 250mV
60
dB
Notes: 1. Operation down to VCC=2V is possible, but performance is reduced.
2. Reference voltage, VREF, is typically at 1/2VCC.
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USA575

Preliminary
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUIT
30k
30k
1µF
VREF
8
12
∑
COMP IN
14
COMP OUT
13
10µF
10µF
10k
11
∆G
10k
16
3.8k
4.7µF
15
2.2µF
Figure 2. Typical Compressor Configuration
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USA575
Preliminary
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUIT

VCC-5V
C15
VREF
0.1µF
C14
1
R1
2
C1
C2
+
-
UTC USA575
C3
J1
10µF
4
OP AMP
EXP
IN
C5
7
10µF
8
VREF
C6
10µF
9
-
18
C11
J2
C13
∑
ALC
S1
4.7µF
C9
2.2µF
14
10k
VREF
10k
△G
C8
13
12
R6
30k
△G
GND
UNISONIC TECHNOLOGIES CO., LTD
COMP
15
∑
10k
C10
R11
16
COMP/
ALC
IN
C12
10µF
R10
17
10
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19
3.8k
6
R12
10k
47µF
+
3.8k
5
C4
2.2µF
20
OP AMP
R2
3
EXP
OUT
VCC
10k
10µF
R7
30k
COMP/
ALC
OUT
C7
1µF
11
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USA575
Preliminary
LINEAR INTEGRATED CIRCUIT
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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