Advanced Product Information
This document contains advanced information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
1
Copyright
Cirrus Logic, Inc. 2002
(All Rights Reserved)
Cirrus Logic, Inc.
http://www.cirrus.com
CS3011
CS3012
Precision Low Voltage Amplifier; DC to 1 kHz
Features
Low Offset: 10
V Max
Low Drift: 0.05
V/C Max
Low Noise
12 nV/
Hz @ 1.0 Hz
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
A Supply Current
Slew rate: 2 V/
s
Applications
Thermocouple/Thermopile Amplifiers
Load Cell and Bridge Transducer Amplifiers
Precision Instrumentation
Battery-Powered Systems
Description
The CS3011 single amplifier and the CS3012 dual am-
plifier 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 de-
vices 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
V-
DNC
V+
Output
DNC
1
2
3
4
8
7
6
5
-
+
CS3011
8-lead SOIC
Out A
-In A
+In A
V-
V+
Out B
-In B
+In B
1
2
3
4
8
7
6
5
A
B
-
-
+
+
CS3012
8-lead SOIC
CS3011
R1
100
R2
64.9k
C1
0.015
F
Dexter Research
Thermopile ST60
Thermopile Amplifier with a Gain of 650 V/V
1
10
100
0.001
0.010
0.1
1
10
Frequency (Hz)
nV
/
Hz
Noise vs. Frequency (Measured)
OCT `02
DS597PP1
CS3011
CS3012
2
1.
CHARACTERISTICS AND SPECIFICATIONS
1.1 ELECTRICAL CHARACTERISTICS
V+ = +5 V, V- = 0V, VCM = 2.5 V (Note 1)
Notes: 1. Symbol "" denotes specification applies over -40 to +85
C.
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 V.
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 input has an internal pullup resistor to V+ of approximately 800 k
and is the major source of
current consumption when PWDN is pulled low.
7. The device has a controlled start-up behavior due to its complex open loop gain characteristics. Start-
up time applies to when supply voltage is applied or when PDWN is released.
Parameter
CS3011/CS3012
Unit
Min
Typ
Max
Input Offset Voltage
(
Note 2
)
-
-
10
V
Average Input Offset Drift
(
Note 2
)
-
0.01
0.05
V/C
Long Term Input Offset Voltage Stability
(Note 3)
Input Bias Current
T
A
= 25 C
-
50
100
1000
pA
Input Offset Current
T
A
= 25 C
-
100
200
2000
pA
Input Noise Voltage Density R
S
= 100
, f
0
= 1 Hz
R
S
= 100
, f
0
= 1 kHz
-
-
12
12
Input Noise Voltage
0.1 to 10 Hz
-
250
nV
p-p
Input Noise Current Density f
0
= 1 Hz
-
2
Input Noise Current
0.1 to 10 Hz
-
40
pA
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
L
= 2 k
to V+/2
(
Note 5
)
200
300
-
dB
Output Voltage Swing
R
L
= 2 k
to V+/2
R
L
= 100 k
to V+/2
+4.7
-
+4.99
-
V
V
Slew Rate
R
L
= 2 k, 100 pF
2
-
V/s
Overload Recovery Time
-
600
-
s
Supply Current per Amplifier
PWDN active (CS3011 Only)
(
Note 6
)
-
0.75
1.0
15
mA
A
PWDN Threshold
(
Note 6
)
(V+) -1.0
Start-up Time
(
Note 7
)
-
9
12
ms
nV/ Hz
nV/ Hz
pA Hz
CS3011
CS3012
3
1.2
ABSOLUTE MAXIMUM RATINGS
2. ORDERING INFORMATION
3. AVAILABILITY
Samples: November 1, 2002
Production: December 1, 2002
Parameter
Min
Typ
Max
Unit
Supply Voltage
[(V+) - (V-)]
6.8
V
Input Voltage
V- -0.3
V+ +0.3
V
Storage Temperature Range
-65
+150
C
Part #
Temperature Range
Package Description
CS3011-IS
-40 C to +85 C
8-lead SOIC
CS3012-IS
-40 C to +85 C
8-lead SOIC
Note: Add the letter R to the Part # to order reels, 2000 pieces per reel.
CS3011
CS3012
4
Contacting Cirrus Logic Support
For all product questions and inquiries contact a Cirrus Logic Sales Representative.
To find one nearest you go to <http://www.cirrus.com/corporate/contacts/sales.cfm>
IMPORTANT NOTICE
"Preliminary" product information describes products that are in production, but for which full characterization data is not yet available. "Advance" product infor-
mation describes products that are in development and subject to development changes. Cirrus Logic, Inc. and its subsidiaries ("Cirrus") believe that the infor-
mation contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided "AS IS" without warranty
of any kind (express or implied). Customers are advised to obtain the latest version of relevant information to verify, before placing orders, that information being
relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those
pertaining to warranty, patent infringement, and limitation of liability. No responsibility is assumed by Cirrus for the use of this information, including use of this
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terial and controlled under the "Foreign Exchange and Foreign Trade Law" is to be exported or taken out of Japan. An export license and/or quota needs to be
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