INA128

® INA1 28 INA1 29 INA1 28 INA1 INA128 INA129 29 Precision, Low Power INSTRUMENTATION AMPLIFIERS FEATURES q LOW OFFSET VOLTAGE: 50µV max q LOW DRIFT: 0.5µV/°C max q LOW INPUT BIAS CURRENT: 5nA max q HIGH CMR: 120dB min q INPUTS PROTECTED TO ±40V q WIDE SUPPLY RANGE: ±2.25 to ±18V q LOW QUIESCENT CURRENT: 700µA q 8-PIN PLASTIC DIP, SO-8 DESCRIPTION The INA128 and INA129 are low power, general purpose instrumentation amplifiers offering excellent accuracy. Their versatile 3-op amp design and small size make them ideal for a wide range of applications. Current-feedback input circuitry provides wide bandwidth even at high gain (200kHz at G = 100). A single external resistor sets any gain from 1 to 10,000. INA128 provides an industry standard gain equation; INA129’s gain equation is compatible with the AD620. The INA128/INA129 is laser trimmed for very low offset voltage (50µV), drift (0.5µV/°C) and high common-mode rejection (120dB at G ≥ 100). It operates with power supplies as low as ±2.25V, and quiescent current is only 700µA—ideal for battery operated systems. Internal input protection can withstand up to ±40V without damage. The INA128/INA129 is available in 8-pin plastic DIP, and SO-8 surface-mount packages, specified for the –40°C to +85°C temperature range. The INA128 is also available in dual configuration, the INA2128. V+ 7 INA128: G=1+ APPLICATIONS q BRIDGE AMPLIFIER q THERMOCOUPLE AMPLIFIER q RTD SENSOR AMPLIFIER q MEDICAL INSTRUMENTATION q DATA ACQUISITION...