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Current sense amplifier weathers harsh environments

Posted: 09 Jun 2008 ?? ?Print Version ?Bookmark and Share

Keywords:current? amplifier sense? automotive?

Linear Technology has introduced the military-plastic-grade (MP-grade) LT6107, a high-side current sense amplifier that operates over the temperature range of -55C to 150C. As a MP-grade device, the LT6107 is guaranteed and tested across the specified temperature range and is intended to meet the demands of automotive, military, industrial, and other harsh environment applications.

The LT6107 operates with common mode voltages up to 36V. The offset voltage is guaranteed to be less than 400?V over temperature and the LT6107 can accept a full-scale differential input of 500mV, resulting in a minimum dynamic range of 1250:1. Over the full operating temperature range, input bias current is guaranteed to be no more than 130nA, essentially eliminating bias current as a source of error, said Linear. For handling fault conditions, the LT6107 can withstand common mode voltages up to 44V and can respond to sudden signal changes within 3.5?s.

Simple to use, two external resistors set the amplifier gain, providing control of gain accuracy and drift, power consumption, response time and input/output impedance. The LT6107 is also pin-compatible with Linear's LT6106, LTC6101 and LTC6101HV, providing interchangeable current sense amplifiers with specific performance advantages.

Price starts at $2.35 each in quantities of 1,000. The device is now in full production.

- Gina Roos

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