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1 / 30 page 1 5V, Rail-Rail I/O, Zero-Drift, Programmable Gain Instrumentation Amplifiers ISL28533, ISL28534, ISL28535, ISL28633, ISL28634, ISL28635 The ISL28533, ISL28534, ISL28535, ISL28633, ISL28634, and ISL28635 are 5V Zero-Drift Rail-to-Rail Input/Output Programmable Gain Instrumentation Amplifiers (PGIA). These instrumentation amplifiers feature low offset, low noise, low gain error and high CMRR. They are ideal for high precision applications over the wide industrial temperature range. These Instrumentation Amplifiers are designed with a unique 2-bit, 3-state logic interface that allows up to 9 selectable gain settings. The ISL2853x single-ended output includes and additional uncommitted zero-drift amplifier, useful to buffer the REF input or used as a precision amplifier. The ISL2863x differential output amplifier includes a reference pin to set the common mode output voltage to interface with differential input ADCs. Applications • Pressure and strain gauge transducers •Weight scales •Flow sensors • Biometric: ECG/blood glucose • Temperature sensors • Test and measurement • Data acquisition systems • Low ohmic current sense Features • Ultra high precision front end amplifier • Zero drift instrumentation amplifier • Pin selectable 9 gain settings: G = 1 to 1,000 • Rail-to-Rail input/output • Single ended output (ISL28533, ISL28534, ISL28535) • Differential output (ISL28633, ISL28634, ISL28635) • RFI filtered inputs improve EMI rejection • Single supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5V to 5.5V • Dual supply . . . . . . . . . . . . . . . . . . . . . . . . . ±1.25V to ±2.75V • Low input offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5µV, Max • Low input offset drift . . . . . . . . . . . . . . . . . . . . . 50nV/°C, Max • High CMRR . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138dB, G = 100 • Low gain error. . . . . . . . . . . . . . . . . . . . . <0.4%, All Gains, Max • Gain bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3MHz • Input voltage noise (0.1Hz to 10Hz). . . . . . . . . . . . . . 0.4µVP-P • Operating temperature range. . . . . . . . . . . .-40°C to +125°C Related Literature • “DAQ on a Stick, Strain Gauge with ProgrammableChopper Stabilized IN-Amp” AN1853 • “ISL2853x_63xEV2Z User's Guide” AN1880 FIGURE 1. ISL2853x SINGLE-ENDED OUTPUT FIGURE 2. ISL2863x DIFFERENTIAL OUTPUT + - + - INA- A2 A1 INA+ + - + - REF OUTA A3 A4 RG RG 9 GAIN CONTROL G0 G1 IN+ IN- OUT VA- VA+ 20kΩ 20kΩ 20kΩ 20kΩ + - + - + - INA- A2 A1 INA+ OUTA- A3 RG RG G0 G1 + - OUTA+ REF A4 VA- VA+ 20kΩ 20kΩ 20kΩ 20kΩ 9 GAIN CONTROL 1MΩ 1MΩ November 22, 2013 FN8364.1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2013. All Rights Reserved Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. |
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