Two amps in one make current sense more flexible

Novel high-side current sense amplifier is ideal for bidirectional operation and provides exceptional flexibility via gain programmability for each current sense direction.

The LTC6104 from Linear Technology is a novel high-side current sense amplifier comprising two complete amplifiers with a combined single bipolar output.

The dual amplifier topology is ideal for bidirectional operation and provides exceptional flexibility via gain programmability for each current sense direction.

Separate amplifiers allow monitoring of a single current sense resistor, or separate sense resistors.

Typical applications for the LTC6104 include battery charging circuitry, H-bridge driver circuits and servo controls.

The LTC6104 has outstanding performance: maximum input bias current is 170nA and maximum input offset voltage is +/-450uV.

This precision performance allows the part to resolve tiny currents and operate over a wide dynamic range.

The LTC6104 can withstand voltages up to 70V, a valuable feature when power supply failures or catastrophic load changes can lead to voltage flyback conditions.

With a response time under 1us, the LTC6104 is ideal for automatic power shutdown under fault conditions.

Gain is set with three external resistors and since the gain resistors are the primary determinants of accuracy, use of precision resistors provides for accuracy better than 1%.

"The LTC6104 continues Linear Technology's leadership in high performance current sense amplifiers", says Mike Kultgen, Design Manager for Linear Technology.

"The LTC6104 addresses a wide array of applications, both straightforward and unique".

The LTC6104 is in full production, with prices starting at US $1.38 each in 1000-piece quantities.

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