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Current sense amp touts 'exceptional' flexibility

Posted: 15 Feb 2007 ?? ?Print Version ?Bookmark and Share

Keywords:current sense amplifier? amplifier? current sensor? Linear? power management?

Linear Technology Corp. has announced a high-side current sense amplifier composed of two complete amplifiers with a combined single bipolar output. The LTC6104's dual amplifier topology is suitable for bidirectional operation and promises 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: input bias current is 170nA max and input offset voltage is 450?V max. This precision performance allows the part to resolve tiny currents and operate over a wide dynamic range. The device can withstand voltages up to 70V, a valuable feature when power supply failures or catastrophic load changes can lead to voltage fly-back conditions. With a response time under 1?s, the LTC6104 is suitable 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 one per cent.

The LTC6104 is in full production, with prices starting at $1.38 each in 1,000-piece quantities.

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Related Datasheets
Part Number Description Category
? LTC6104 High Voltage, High Side, Bi-Directional Current Sense Amplifier Circuit and Heat Protection Devices



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