CS3011
CS3012
Precision Low Voltage Amplifier; DC to 1 kHz
Features
Description
Low Offset: 10 µV Max
Low Drift: 0.05 µV/°C Max
Low Noise
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).
– 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
Pin Configurations
Rail-to-Rail Output Swing
750 µA Supply Current
Slew rate: 2 V/µs
CS3011
Applications
Thermocouple/Thermopile Amplifiers
Load Cell and Bridge Transducer Amplifiers
Precision Instrumentation
Battery-Powered Systems
PWDN
1
-In
2
-
+In
3
+
V-
4
CS3012
8 DNC
Out A 1
7 V+
-In A 2
6 Output
5 DNC
7 Out B
B
+ -
V- 4
6 -In B
5 +In B
8-lead SOIC
CS3011
100
nV/√Hz
A
- +
+In A 3
8-lead SOIC
Noise vs. Frequency (Measured)
8 V+
Dexter Research
Thermopile ST60
R2
64.9k
10
1
0.001
R1
100
0.010
0.1
1
Frequency (Hz)
Advanced Product Information
Cirrus Logic, Inc.
http://www.cirrus.com
C1
0.015µ
µF
10
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.
Copyright Cirrus Logic, Inc. 2002
(All Rights Reserved)
OCT ‘02
DS597PP1
1
CS3011
CS3012
1.
CHARACTERISTICS AND SPECIFICATIONS
1.1 ELECTRICAL CHARACTERISTICS
V+ = +5 V, V- = 0V, VCM = 2.5 V (Note 1)
CS3011/CS3012
Parameter
Min
Typ
Max
Unit
-
±10
µV
±0.01
±0.05
µV/ºC
Input Offset Voltage
(Note 2)
•
-
Average Input Offset Drift
(Note 2)
•
-
Long Term Input Offset Voltage Stability
(Note 3)
TA = 25º C
-
±50
±100
±1000
pA
-
±100
±200
±2000
pA
Input Noise Voltage Density RS = 100 Ω, f0 = 1 Hz
RS = 100 Ω, f0 = 1 kHz
-
12
12
nV/ Hz
nV/ Hz
Input Noise Voltage
-
250
nVp-p
Input Noise Current Density f0 = 1 Hz
-
2
pA Hz
Input Noise Current
-
40
pAp-p
-0.1
-
Input Bias Current
•
Input Offset Current
TA = 25º C
•
0.1 to 10 Hz
0.1 to 10 Hz
Input Common Mode Voltage Range
Common Mode Rejection Ratio (dc)
•
(Note 4)
Power Supply Rejection Ratio
Large Signal Voltage Gain RL = 2 kΩ to V+/2
Output Voltage Swing
RL = 2 kΩ to V+/2
RL = 100 kΩ to V+/2
Slew Rate
(Note 5)
(V+)-1.25
V
•
115
120
-
dB
•
120
136
-
dB
•
200
300
-
dB
•
+4.7
+4.99
-
V
V
2
-
V/µs
-
600
-
µs
0.75
1.0
15
mA
µA
9
12
ms
RL = 2 k, 100 pF
Overload Recovery Time
Supply Current per Amplifier
PWDN active (CS3011 Only)
•
•
-
(Note 6)
PWDN Threshold
(Note 6)
•
(V+) -1.0
Start-up Time
(Note 7)
•
-
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 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 input has an internal pullup resistor to V+ of approximately 800 kΩ 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. Startup time applies to when supply voltage is applied or when PDWN is released.
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CS3011
CS3012
1.2
ABSOLUTE MAXIMUM RATINGS
Parameter
Supply Voltage
Min
Max
Unit
6.8
V
V- -0.3
V+ +0.3
V
-65
+150
ºC
[(V+) - (V-)]
Input Voltage
Storage Temperature Range
Typ
2. ORDERING INFORMATION
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.
3. AVAILABILITY
Samples: November 1, 2002
Production: December 1, 2002
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CS3011
CS3012
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 information describes products that are in development and subject to development changes. Cirrus Logic, Inc. and its subsidiaries ("Cirrus") believe that the information 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
information as the basis for manufacture or sale of any items, or for infringement of patents or other rights of third parties. This document is the property of Cirrus
and by furnishing this information, Cirrus grants no license, express or implied under any patents, mask work rights, copyrights, trademarks, trade secrets or
other intellectual property rights. Cirrus owns the copyrights of the information contained herein and gives consent for copies to be made of the information only
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PROPERTY OR ENVIRONMENTAL DAMAGE ("CRITICAL APPLICATIONS"). CIRRUS PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF CIRRUS PRODUCTS
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