The LTC6104 from Linear Technology is a unique high-side current sense amplifier that’s composed of two complete amplifiers with a combined single bipolar output. The dual amplifier topology is ideal for bi-directional 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 amplifier’s input bias current is 170nA (max.) and input offset voltage is ±450uV (max.). It 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 1us, the LTC6104 is ideal for automatic power shutdown under fault conditions.
Linear Technology Corporation, www.linear.com
Illustrations:
Figure 1
