Cirrus Logic CS3002 - Manual

Copyright  Cirrus Logic, Inc. 2012
(All Rights Reserved)
Cirrus Logic, Inc.
http://www.cirrus.com
CS3002
Precision Low-voltage Amplifier; DC to 2kHz
Features & Description
• Low Offset: 10 V Max
• Low Drift: 0.05 V/°C Max
• Low Noise
- 6nV/ @ 0.5Hz
- 0.1 to 10Hz = 125 nVpp
- 1/f corner @ 0.08Hz
• Open-loop Voltage Gain
- 300dB Typical
- 200dB Minimum
• Rail-to-rail Output Swing
• Slew Rate: 5V/
s
Applications
• Thermocouple/Thermopile Amplifiers
• Load Cell and Bridge Transducer Amplifiers
• Precision Instrumentation
• Battery-powered Systems
Description
The CS3002 dual amplifier is designed for precision am-
plification of low-level signals and is ideally suited for
applications that require very high closed-loop gains.
These amplifiers achieve excellent offset stability, super-
high open-loop gain, and low noise over time and tem-
perature. The devices also exhibit excellent CMRR and
PSRR. The common mode input range includes the neg-
ative supply rail. The amplifiers operate with any total
supply voltage from 2.7V to 6.7V (±1.35V to ±3.35V).
Pin Configuration
Hz
Out A
-In A
+In A
V-
V+
Out B
-In B
+In B
A
B
-
-
+
+
1
2
3
4
8
7
6
5
CS3002
8-lead SOIC
Noise vs. Frequency (Measured)
1
10
100
0.001 0.01 0.1 1 10
Frequency (Hz)
nV
/√
Hz
CS3002
R1
100
R2
64.9k
C2
0.015 F
Dexter Research
Thermophile 1M
DEC ‘12
DS490F10