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CS3001-ISZ

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
http://www.cirrus.com
Copyright Cirrus Logic, Inc. 2009
(All Rights Reserved)
CS3001
CS3002
Precision Low-voltage Amplifier; DC to 2 kHz
Features & Description
Low Offset: 10 μV Max
Low Drift: 0.05 μV/°C Max
Low Noise
–6 nV/√Hz @ 0.5 Hz
– 0.1 to 10 Hz = 125 nVp-p
– 1/f corner @ 0.08 Hz
Open-loop Voltage Gain
– 300 dB Typical
– 200 dB Minimum
Rail-to-rail Output Swing
Slew Rate: 5 V/μs
Applications
Thermocouple/Thermopile Amplifiers
Load Cell and Bridge Transducer Amplifiers
Precision Instrumentation
Battery-powered Systems
Description
The CS3001 single amplifier and the CS3002 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-
NC
V+
Output
NC
1
2
3
4
8
7
6
5
-
+
Out A
-In A
+In A
V-
V+
Out B
-In B
+In B
A
B
-
-
+
+
1
2
3
4
8
7
6
5
CS3001
8-lead SOIC
CS3002
8-lead SOIC
Noise vs. Frequency (Measured)
1
10
100
0.001 0.01 0.1 1 10
Frequency (Hz)
nV/√Hz
CS3001
R1
100
R2
64.9k
C1
0.015μF
Dexter Research
Thermopile 1M
Thermopile Amplifier with a Gain of 650 V/V
JUL ‘09
DS490F9
CS3001
CS3002
2 DS490F9
TABLE OF CONTENTS
1. CHARACTERISTICS AND SPECIFICATIONS .............................................. 3
ELECTRICAL CHARACTERISTICS...................................................................3
ABSOLUTE MAXIMUM RATINGS .....................................................................4
2. TYPICAL PERFORMANCE PLOTS .............................................................. 4
3. CS3001/CS3002 OVERVIEW ......................................................................... 8
3.1 Open-loop Gain and Phase Response .................................................................8
3.2 Open-loop Gain and Stability Compensation .......................................................9
3.2.1 Discussion ...................................................................................................9
3.2.2 Gain Calculations Summary and Recommendations ...............................12
3.3 Powerdown (PDWN) ..........................................................................................12
3.4 Applications ........................................................................................................12
4. PACKAGE DRAWING .................................................................................. 14
5. ORDERING INFORMATION ........................................................................ 15
6. ENVIRONMENTAL, MANUFACTURING, & HANDLING INFORMATION .. 15
7. REVISION HISTORY ................................................................................... 16
LIST OF FIGURES
Figure 1. Noise vs. Frequency (Measured) ........................................................................4
Figure 2. 0.01 Hz to 10 Hz Noise .......................................................................................4
Figure 3. Supply Current vs. Temperature, 3001 ...............................................................4
Figure 4. Noise vs. Frequency ...........................................................................................4
Figure 5. Offset Voltage Stability (DC to 3.2 Hz) ...............................................................4
Figure 6. Supply Current vs. Temperature, 3002 ...............................................................4
Figure 7. Supply Current vs. Voltage, 3001 .......................................................................5
Figure 8. Supply Current vs. Voltage, 3002 .......................................................................5
Figure 9. Open-loop Gain and Phase vs. Frequency .........................................................5
Figure 10. Open-loop Gain and Phase vs. Frequency (Expanded) ...................................6
Figure 11. Input Bias Current vs. Supply Voltage (CS3002) ..............................................6
Figure 12. Input Bias Current vs. Common Mode Voltage ................................................7
Figure 13. Voltage Swing vs. Output Current (2.7 V) .........................................................7
Figure 14. Voltage Swing vs. Output Current (5 V) ............................................................7
Figure 15. CS3001/CS3002 Open-loop Gain and Phase Response .................................8
Figure 16. Non-inverting Gain Configuration .....................................................................9
Figure 17. Non-inverting Gain Configuration with Compensation ....................................10
Figure 18. Loop Gain Plot: Unity Gain and with Pole-zero Compensation ......................11
Figure 19. Thermopile Amplifier with a Gain of 650 V/V ..................................................13
Figure 20. Load Cell Bridge Amplifier and A/D Converter ...............................................13
CS3001
CS3002
DS490F9 3
1. CHARACTERISTICS AND SPECIFICATIONS
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 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 active low.
7. The device has a controlled start-up behavior due to its complex open loop gain characteristics. Start-
up time applies when supply voltage is applied or when PDWN
is released.
Parameter
CS3001/CS3002
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
A
= 25º C
•
-
-
±100
-
-
±1000
pA
pA
Input Offset Current T
A
= 25º C
•
-
-
±200
-
-
±2000
pA
pA
Input Noise Voltage Density R
S
= 100 Ω, f
0
= 1 Hz
R
S
= 100 Ω, f
0
= 1 kHz
-
-
6
6
Input Noise Voltage 0.1 to 10 Hz - 125 nV
p-p
Input Noise Current Density f
0
= 1 Hz - 100
Input Noise Current 0.1 to 10 Hz - 1.9 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 kΩ to V+/2 (Note 5) • 200 300 - dB
Output Voltage Swing R
L
= 2 kΩ to V+/2
R
L
= 100 kΩ to V+/2
• +4.7 -
+4.99
-V
V
Slew Rate R
L
= 2 k, 100 pF 5 - V/µs
Overload Recovery Time - 100 - µs
Supply Current CS3001
CS3002
PWDN
active (CS3001 Only) (Note 6)
•
•
•
-
-
2.1
3.6
2.8
4.8
15
mA
mA
µA
PWDN
Threshold (Note 6)
• (V+) -1.0 - - V
Start-up Time (Note 7) • -912 ms
fA/ Hz
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

CS3001-ISZ

Mfr. #:
Buy CS3001-ISZ
Manufacturer:
Cirrus Logic
Description:
Precision Amplifiers Low-Noise Op Amp Single 2.1mA
Lifecycle:
New from this manufacturer.
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