CS3011

CS3011 CS3012 Precision Low Voltage Amplifier; DC to 1 kHz Features Low Offset: 10 µV Max Low Drift: 0.05 µV/°C Max Low Noise – 12 nV/√Hz @ 1.0 Hz – 0.1 to 10 Hz = 250 nVp-p – 1/f corner @ 0.08 Hz Description 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). Open-Loop Voltage Gain – 1000 Trillion Typ – 10 Billion Min Rail-to-Rail Output Swing 750 µA Supply Current Slew rate: 2 V/µs Pin Configurations CS3011 PWDN -In +In V1 2 3 4 + 8 DNC 7 V+ 6 Output 5 DNC Out A 1 -In A 2 +In A 3 V- 4 A -+ +B CS3012 8 V+ 7 Out B 6 -In B 5 +In B Applications Thermocouple/Thermopile Amplifiers Load Cell and Bridge Transducer Amplifiers Precision Instrumentation Battery-Powered Systems 8-lead SOIC 8-lead SOIC Noise vs. Frequency (Measured) 100 nV/√Hz CS3011 Dexter Research Thermopile ST60 R2 64.9k 10 1 0.001 R1 100 C1 0.015µF 0.010 0.1 Frequency (Hz) 1 10 Thermopile Amplifier with a Gain of 650 V/V Advanced Product Information Cirrus Logic, Inc. http://www.cirrus.com 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 Input Offset Voltage Average Input Offset Drift Long Term Input Offset Voltage Stability Input Bias Current Input Offset Current Input Noise Voltage Density RS = 100 Ω, f0 = 1 Hz RS = 100 Ω, f0 = 1 kHz Input Noise Voltage Input Noise Current 0.1 to 10 Hz 0.1 to 10 Hz • (Note 4) (Note 5) • • • • Input Noise Current Density f0 = 1 Hz Input Common Mode Voltage Range Common Mode Rejection Ratio (dc) 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 Overload Recovery Time Supply Current per Amplifier PWDN active (CS3011 Only) PWDN Threshold Start-up Time (Note 6) (Note 6) (Note 7) • • • • RL = 2 k, 100 pF (V+) -1.0 9 12 ms TA = 25º C • TA = 25º C • -0.1 115 120 200 +4.7 12 12 250 2 40 120 136 300 +4.99 2 600 0.75 (V+)-1.25 1.0 15 ±100 (Note 2) (Note 2) • • Min Typ ±0.01 (Note 3) ±50 ±100 ±1000 ±200 ±2000 pA pA nV/ Hz nV/ Hz Max ±10 ±0.05 Unit µV µV/ºC nVp-p pA Hz pAp-p V dB dB dB V V V/µs µs mA µA 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. 2 CS3011 CS3012 1.2 ABSOLUTE MAXIMUM RATINGS Parameter Supply Voltage Input Voltage Storage Temperature Range [(V+) - (V-)] V- -0.3 -65 Min Typ Max 6.8 V+ +0.3 +150 Unit V V ºC 2. ORDERING INFORMATION Part # CS3011-IS CS3012-IS Temperature Range -40 °C to +85 °C -40 °C to +85 °C Package Description 8-lead SOIC 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 3 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 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. 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