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Devices Ease Current Measurement Designs in Automotive, Motor Control and Power Management Applications


DALLAS - Texas Instruments Incorporated (TI) (NYSE: TXN) today introduced a pair of voltage-output, high-side current sense monitors with a wide common-mode input range of -16V to +80V. The INA270 and INA271 also feature a two-stage architecture to ease the design of circuits requiring additional filtering of the current signal. The devices are especially suited for current measurement applications in automotive, motor control, power management and battery charging. (See

In addition to solving the challenging problem of measuring small shunt drops residing at high common-mode voltages, filter networks can be included between the two stages of the INA270 and INA271 to preserve the buffered voltage output. As a result, no additional amplifiers are required when driving analog-to-digital converters or low impedance loads.

The extended common-mode inputs of the INA270 and INA271 cover the range from automotive battery reversals at -16V to beyond automotive transient overshoot requirements at +80V. All this is available while being powered by single-supply voltages from +2.7V to +18V.

The devices also feature high accuracy (3 percent maximum error over temperature), wide bandwidth (130kHz), low quiescent current (900uA maximum) and specification over a -40C to +125C temperature range. Two gains are available: the INA270 at a gain of 14 and the INA271 at a gain of 20. Additional applications for the INA270 and INA271 include telecommunications, notebook computers, welding equipment, and test and measurement.

Available Today

The INA270 and INA271 are available now from TI and its authorized distributors. The devices are available in SO-8 packages and are priced from $0.80 in 1,000-piece quantities (suggested resale pricing).

TI offers analog engineers a wide-ranging support infrastructure that includes training and seminars, design tools and utilities, technical documentation, evaluation modules, an online KnowledgeBase, a product information hotline and a comprehensive offering of samples that ship within 24 hours of request. For more information on TIís complete analog design support, and to download the latest Amplifier and Data Converter Selection Guide, visit


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