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Current sense amplifier withstands 44V voltage

Posted: 16 May 2007     Print Version  Bookmark and Share

Keywords:current sense amplifier  high-side sense amplifier  small differential 

Linear Technology has launched a low-cost, high-side current sense amplifier that offers a dynamic range of 2000:1 with only 250?V (max) of input offset voltage and a full-scale differential input of 500mV. Suitable for industrial and automotive applications such as power management, motion control and battery charging, the LT6106 can resolve small differential signals from common mode voltages up to 36V.

The input bias current is guaranteed to be no more than 40nA, essentially eliminating bias current as a source of error. For handling fault conditions, the new sense amplifier can withstand common mode voltages up to 44V and can respond to signal changes within 3.5?sec. The operating temperature range of -40?C to 125?C makes the LT6106 suitable for industrial and automotive applications such as power management, motion control and battery charging.

The LT6106 is versatile and simple to use. Two external resistors set the amplifier gain, providing control of gain accuracy and drift, power consumption, response time and I/O impedance. The product's SOT-23 package is pin-compatible with the company's LTC6101 and LTC6101HV, providing designers with interchangeable current sense amplifiers for inputs up to 36-, 60- or 100V.

"The performance and low cost of the LT6106 enables wider adoption of current sense in industrial and automotive applications," says Mike Kultgen, design manager for Linear Technology.

The LT6106 is in full production, with prices starting at 82 each in 1,000-piece quantities.

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