Cirrus Logic CS3014 User Manual
7/29/09
CS3014
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
Noise vs. Frequency (Measured)
0.01 Hz to 10 Hz Noise Performance
1
10
100
1000
0.01 0.1 1 10
Frequency (Hz)
-300
-200
-100
0
100
200
300
012345678910
Time (sec)
CS3014
Low-power / Low-voltage Precision Amplifier
Features & Description
Low Offset:
–10 μV Typ.
Low Drift:
–0.05 μV/°C Max.
Low Noise:
– 22 nV/√Hz
Open-loop Voltage Gain:
– 135 dB Typ.
Rail-to-Rail Inputs
Rail-to-Rail Output Swing
– to within 20 mV of supply voltage
1.0 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 Configurations
Cirrus Logic, Inc.
http://www.cirrus.com
Copyright Cirrus Logic, Inc. 2009
(All Rights Reserved)
JUL ‘09
DS711F2
7/29/09
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 ................................................................................. 6
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
CS3014
2 DS711F2
7/29/09
nV/ Hz
nV/ Hz
fA/ Hz
CS3014
1. CHARACTERISTICS AND SPECIFICATIONS
1.1 5 V Electrical Characteristics
V+ = +5 V,
Input Offset Voltage (Note 2) • -±10±20µV
Average Input Offset Drift (Note 2) • -±0.01±0.05µV/ºC
Input Bias Current
Input Offset Current
Input Noise Voltage Density R
Input Noise Volt age 0.1 to 10 Hz - 460 - 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) • 105 120 - dB
Power Supply Rejection Ratio • 100 120 - dB
Large Signal Voltage Gain
(Note 3)R
Output Voltage Swing R
(Note 4)R
Slew Rate R
Overload Recovery Time - 40 - µs
Supply Current • - 1.0 1.25 mA
Oscillator Frequency - 125 - kHz
Input Capacitance Differential
Common Mode
±5%;
V- = 0V; VCM = 2.5 V; Unless otherwise noted,
Parameter Min Typ Max Unit
= 100 Ω, f0 = 1 Hz
S
R
= 100 Ω, f0 = 1 kHz
S
= 2 kΩ to V+/2 •
L
= 2 kΩ to V+/2
L
= 100 kΩ to V+/2
L
L
TA = 25º C (See Note 1).
-
•
-
-
•
-
-
-
-
112
• (V+ – 200)
(V+ – 20)
±170
-
±340
-
22
22
145
135
-
-
±250
±1.5
±500
±3.0
-
-
-
-
(V- + 200)
(V- + 20)
pA
nA
pA
nA
p-p
p-p
dB
dB
mV
mV
= 2 k, 100 pF - 0.25 - V/µs
-
-
1.5
10
-
-
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.
DS711F2 3
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