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Cirrus Logic, Inc.

http://www.cirrus.com

CS3004

Precision Low-voltage Amplifier

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 am-

plification 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 sup-

ply rails. The amplifiers operate with any supply voltage

from 2.7 V to 5 V (±1.35 V to ±2.50 V).

Pin Configuration

CS3004

8-Lead SOIC

(Top View)

Out A

-In A

+In A

V-

V+

Out B

-In B

+In B

100

1000

0.01 0.1 1 10

Frequency (Hz)

-200

-150

-100

-50

100

150

200

012345678910

Time (sec)

Noise vs. Frequency (Measured) 0.01 Hz to 10 Hz Noise Performance

JUL ‘09

DS719F2

Summary of content (10 pages)

PAGE 1
CS3004 Precision Low-voltage Amplifier Features & Description  Description Low Offset: 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). – 10 μV Max.  Low Drift: – 0.05 μV/°C Max.
PAGE 2
CS3004 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 .............................................................
PAGE 3
CS3004 1. CHARACTERISTICS AND SPECIFICATIONS 1.1 5 V Electrical Characteristics V+ = +5 V, ±5%; V- = 0V; VCM = 2.5 V; Unless otherwise noted, TA = 25º C (See Note 1). Parameter Min Typ Max Unit Input Offset Voltage (Note 2) • - ±2 ±10 µV Average Input Offset Drift (Note 2) • - ±0.01 ±0.05 µV/ºC • - ±170 - ±250 ±1.5 pA nA • - ±340 - ±500 ±3.
PAGE 4
CS3004 1.2 3 V Electrical Characteristics V+ = +3 V, ±10%; V- = 0V; VCM = 2.5 V; Unless otherwise noted, TA = 25º C (See Note 5). Min Typ Max Unit Input Offset Voltage Parameter (Note 6) • - ±2 ±10 µV Average Input Offset Drift (Note 6) • - ±0.01 ±0.05 µV/ºC • - ±110 - ±150 ±1.0 pA nA • - ±220 - ±300 ±2.0 pA nA RS = 100 Ω, f0 = 1 Hz RS = 100 Ω, f0 = 1 kHz - 17 17 - nV/ Hz nV/ Hz 0.1 to 10 Hz - 350 - nVp-p f0 = 1 Hz - 100 - fA/ Hz 0.1 to 10 Hz - 1.
PAGE 5
CS3004 1.3 Absolute Maximum Ratings Supply Voltage Parameter Min Typ Max Unit [(V+) – (V-)] 2.7 - 5.5 V (V-) – 0.3 - (V+) + 0.3 V -65 - +150 ºC Input Voltage Storage Temperature Range 2. TYPICAL PERFORMANCE PLOTS 1000 200 150 100 100 50 0 -50 10 -100 -150 1 0.01 0.1 1 -200 10 0 Frequency (Hz) 1 1 10 100 1k 3 4 5 6 7 8 9 10 Time (sec) Figure 1. Noise vs Frequency (Measured) 180 160 140 120 100 80 60 40 20 0 -20 0.001 0.01 0.1 2 10k 100k 1M Figure 2. 0.
PAGE 6
CS3004 Typical Performance Plots (Cont.) V+ V+ -50 -50 +125°C -40°C -150 +25°C -200 +200 -40°C +150 +25°C +125°C +100 +25°C -200 +200 -40°C +150 +25°C +125°C +50 0 1 2 3 Output Current (mA) 4 Figure 7. Voltage Swing vs. Output Current (2.7 V) 6 -40°C -150 +100 +50 V– +125°C -100 Output Voltage (mV) Output Voltage (mV) -100 5 V– 0 1 2 3 Output Current (mA) 4 5 Figure 8. Voltage Swing vs.
PAGE 7
CS3004 3. PACKAGE DRAWINGS 8L SOIC (150 MIL BODY) PACKAGE DRAWING E H 1 b c D SEATING PLANE ∝ A L e DIM A A1 B C D E e H L ∝ A1 MIN 0.053 0.004 0.013 0.007 0.189 0.150 0.040 0.228 0.016 0° INCHES MAX 0.069 0.010 0.020 0.010 0.197 0.157 0.060 0.244 0.050 8° MILLIMETERS MIN MAX 1.35 1.75 0.10 0.25 0.33 0.51 0.19 0.25 4.80 5.00 3.80 4.00 1.02 1.52 5.80 6.20 0.40 1.
PAGE 8
CS3004 4. ORDERING INFORMATION Part # Temperature Range Package Description CS3004-FSZ -40 °C to +125 °C 8-lead SOIC, Lead Free 5. ENVIRONMENTAL, MANUFACTURING, & HANDLING INFORMATION Model Number Peak Reflow Temp MSL Rating* Max Floor Life CS3004-FSZ 260 °C 2 365 Days * MSL (Moisture Sensitivity Level) as specified by IPC/JEDEC J-STD-020.
PAGE 9
CS3004 6. REVISION HISTORY Revision Date PP4 FEB 2007 First public release. F1 AUG 2007 Updated to “Final” per QPL process. F2 JUL 2009 Removed lead-containing SOIC & QFN packages from ordering information.
PAGE 10
CS3004 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 IMPORTANT NOTICE 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).