Cirrus Logic CS3004 User Manual
Precision Low-voltage Amplifier
CS3004
8-Lead SOIC
(Top View)
Out A
-In A
+In A
V-
V+
Out B
-In B
+In B
A
B
-
-
+
+
1
2
3
4
8
7
6
5
1
10
100
1000
0.01 0.1 1 10
Frequency (Hz)
-200
-150
-100
-50
0
50
100
150
200
012345678910
Time (sec)
Noise vs. Frequency (Measured) 0.01 Hz to 10 Hz Noise Performance
CS3004
Features & Description
Low Offset:
–10 μV Max.
Low Drift:
–0.05 μV/°C Max.
Low Noise:
– 17 nV/√Hz
Open-loop Voltage Gain:
– 150 dB Typ.
Rail-to-Rail Inputs
Rail-to-Rail Output Swing
– to within 10 mV of supply voltage
2.1 mA Supply Current
Slew rate:
–0.25 V/μs
Applications
Thermocouple/Thermopile Amplifiers
Load Cell and Bridge Transducer Amplifiers
Precision Instrumentation
Battery-powered Systems
Description
The CS3004 dual amplifier is designed for precision amplification of low-level signals. These amplifiers achieve
excellent offset stability, high open loop gain, and low
noise. The devices also exhibit excellent CMRR and
PSRR. The common mode input range includes the supply rails. The amplifiers operate with any supply voltage
from 2.7 V to 5 V (±1.35 V to ±2.50 V).
Pin Configuration
Cirrus Logic, Inc.
http://www.cirrus.com
Copyright Cirrus Logic, Inc. 2009
(All Rights Reserved)
JUL ‘09
DS719F2
TABLE OF CONTENTS
1. CHARACTERISTICS AND SPECIFICATIONS ............................................. 3
1.1 5 V Electrical Characteristics ................................................................... 3
1.2 3 V Electrical Characteristics ................................................................... 4
1.3 Absolute Maximum Ratings ..................................................................... 5
2. TYPICAL PERFORMANCE PLOTS .............................................................. 5
3. PACKAGE DRAWINGS ................................................................................. 7
4. ORDERING INFORMATION .......................................................................... 8
5. ENVIRONMENTAL, MANUFACTURING, & HANDLING INFORMATION ... 8
6. REVISION HISTORY .................................................................................... 9
LIST OF FIGURES
Figure 1. Noise vs Frequency (Measured) .................................................................................5
Figure 2. 0.01 Hz to 10 Hz Noise ................................................................................................5
Figure 3. Gain & Phase vs. Frequency (2.7 V)............................................................................5
Figure 4. Gain & Phase vs. Frequency (5 V) ..............................................................................5
Figure 5. Supply Current vs. Supply Voltage ..............................................................................5
Figure 6. Supply Current vs. Temperature .................................................................................5
Figure 7. Voltage Swing vs. Output Current (2.7 V) ...................................................................6
Figure 8. Voltage Swing vs. Output Current (5 V) .......................................................................6
CS3004
2 DS719F2
CS3004
nV/ Hz
nV/ Hz
fA/ Hz
1. CHARACTERISTICS AND SPECIFICATIONS
1.1 5 V Electrical Characteristics
V+ = +5 V, ±5%; V- = 0V; VCM = 2.5 V; Unless otherwise noted,
Parameter Min Typ Max Unit
Input Offset Voltage (Note 2) • -±2±10µV
Average Input Offset Drift (Note 2) • - ±0.01 ±0.05 µV/ºC
Input Bias Current
Input Offset Current
Input Noise Voltage Density R
= 100 Ω, f0 = 1 Hz
S
R
= 100 Ω, f0 = 1 kHz
S
Input Noise Voltage 0.1 to 10 Hz - 350 - nV
Input Noise Current Density f0 = 1 Hz - 100 -
Input Noise Current 0.1 to 10 Hz - 1.9 pA
Input Voltage Range (Note 2) • V- - V+ V
Common Mode Rejection Ratio (dc) • 110 120 - dB
Power Supply Rejection Ratio • 110 130 - dB
Large Signal Voltage Gain
(Note 3)R
Output Voltage Swing R
(Note 4)R
Slew Rate R
= 2 kΩ to V+/2 •
L
= 2 kΩ to V+/2
L
= 100 kΩ to V+/2
L
= 2 k, 100 pF 0.25 - V/µs
L
Overload Recovery Time - 25 - µs
Supply Current • -2.02.5mA
Oscillator Frequency - 150 - kHz
Input Capacitance Differential
Common Mode
TA = 25º C (See Note 1).
-
•
-
-
•
-
±170
±340
-
-
-
120
• (V+ – 100)
(V+ – 10)
-
-
-
-
17
17
150
150
-
-
1.5
10
±250
±1.5
±500
±3.0
-
-
-
-
(V- + 100 )
(V- + 10)
-
-
pA
nA
pA
nA
p-p
p-p
dB
dB
mV
mV
pF
pF
Notes: 1. Symbol “•” denotes specification applies over -40 to +125
° C.
2. This parameter is guaranteed by design and/or laboratory characterization.
3. Guaranteed within the output limits of (V+ – 0.2 V) to (V- + 0.2 V).
4. Specifies the worst case drive voltage relative to the supply rail under stated load conditions.
DS719F2 3
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