Cirrus Logic CS3012-IS, CS3011-IS Datasheet
CS3011
CS3012
Precision Low Voltage Amplifier; DC to 1 kHz
Features
Low Offset: 10 µVMax
Low Drift: 0.05 µV/°C Max
Low Noise
–12nV/√Hz @1.0Hz
– 0.1 to 10 Hz = 250 nVp-p
– 1/f corner @ 0.08 Hz
Open-Loop Voltage Gain
– 1000 Trillion Typ
– 10 Billion Min
Rail-to-Rail Output Swing
750 µA Supply Current
Slew rate: 2 V/µs
Applications
Thermocouple/Thermopile Amplifiers
Load Cell and Bridge Transducer Amplifiers
Precision Instrumentation
Battery-Powered Systems
Description
The CS3011 single amplifier and the CS3012 dual amplifier are designed for precision amplification of low
level signals and are ideally suited to 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 temperature. The devices also exhibit excellent CMRR and PSRR. The
common mode input range includes the negative supply
rail. The amplifiers operate with any total supply voltage
from 2.7 V to 6.7 V (±1.35 V to ±3.35 V).
Pin Configurations
PWDN
-In
+In
CS3011
1
2
3
4
V-
8-lead SOIC
DNC
8
-
+
7
6
5
V+
Output
DNC
Out A
-In A
+In A
CS3012
1
2
3
V-
4
8-lead SOIC
8
V+
A
+
-
7
Out B
B
6
+
-In B
-
5
+In B
Noise vs. Frequency (Measured)
100
10
1
0.001 0.010 0.1 1 10
Frequency (Hz)
Advanced Product Information
Cirrus Logic, Inc.
http://www.cirrus.com
CS3011
Dexter Research
Thermopile ST60
R1
100
Thermopile Amplifier with a Gain of 650 V/V
This document contains advanced information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
CopyrightCirrus Logic, Inc. 2002
(All Rights Reserved)
R2
64.9k
C1
0.015µµµµF
DS597PP1
OCT ‘02
1
1. CHARACTERISTICS AND SPECIFICATIONS
1.1 ELECTRICAL CHARACTERISTICS
CS3011
CS3012
V+=+5V,V-=0V,VCM=2.5V
(Note 1)
CS3011/CS3012
Parameter
UnitMin Typ Max
Input Offset Voltage (Note 2) • --±10 µV
Average Input Offset Drift (Note 2) • -±0.01±0.05 µV/ºC
Long Term Input Offset Voltage Stability (Note 3)
Input Bias Current T
=25ºC
A
•
Input Offset Current T
=25ºC
A
•
Input Noise Voltage Density R
= 100 Ω,f0=1Hz
S
R
= 100 Ω,f0=1kHz
S
Input Noise Voltage 0.1 to 10 Hz - 250 nV
Input Noise Current Density f0=1Hz - 2
Input Noise Current 0.1 to 10 Hz - 40 pA
- ±50 ±100
±1000
- ±100 ±200
±2000
-
-
12
12
pA
pA
nV/ Hz
nV/ Hz
p-p
pA Hz
p-p
Input Common Mode Voltage Range • -0.1 - (V+)-1.25 V
Common Mode Rejection Ratio (dc) (Note 4) • 115 120 - dB
Power Supply Rejection Ratio • 120 136 - dB
Large Signal Voltage Gain R
Output Voltage Swing R
Slew Rate R
=2kΩ to V+/2 (Note 5) • 200 300 - dB
L
=2kΩ to V+/2
L
R
= 100 kΩ to V+/2
L
= 2 k, 100 pF 2 - V/µs
L
• +4.7 +4.99
-V
V
Overload Recovery Time - 600 - µs
Supply Current per Amplifier
PWDN
PWDN
Threshold (Note 6)
active (CS3011 Only) (Note 6)••
• (V+) -1.0
-0.751.015mA
µA
Start-up Time (Note 7) • -912 ms
Notes: 1. Symbol “•” denotes specification applies over -40 to +85
2. This parameter is guaranteed by design and laboratory characterization. Thermocouple effects prohibit
accurate measurement of these parameters in automatic test systems.
3. 1000-hour life test data @ 125 °C indicates randomly distributed variation approximately equal to
measurement repeatability of 1 µV.
4. Measured within the specified common mode range limits.
5. Guaranteed within the output limits of (V+ -0.3 V) to (V- +0.3 V). Tested with proprietary production test
method.
6. PWDN
current consumption when PWDN
input has an internal pullup resistor to V+ of approximately 800 kΩ and is the major source of
is pulled low.
7. The device has a controlled start-up behavior due to its complex open loop gain characteristics. Startup time applies to when supply voltage is applied or when PDWN
2
° C.
is released.
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