LT1999-50

LT1999-10/LT1999-20/ LT1999-50 High Voltage, Bidirectional Current Sense Amplifier Features nn Buffered Output with 3 Gain Options: 10V/V, 20V/V, 50V/V nn Gain Accuracy: 0.5% Max nn Input Common Mode Voltage Range: –5V to 80V nn AC CMRR > 80dB at 100kHz nn Input Offset Voltage: 1.5mV Max nn –3dB Bandwidth: 2MHz nn Smooth, Continuous Operation Over Entire Common Mode Range nn 4kV HBM Tolerant and 1kV CDM Tolerant nn Low Power Shutdown <10µA nn –55°C to 150°C Operating Temperature Range nn 8-Lead MSOP and 8-Lead SO (Narrow) Packages nn 8-Lead MSOP Pinout Option Engineered for FMEA Applications nn High Side or Low Side Current Sensing nn H-Bridge Motor Control nn Solenoid Current Sense nn High Voltage Data Acquisition nn PWM Control Loops nn Fuse/MOSFET Monitoring Description The LT®1999 is a high speed precision current sense amplifier, designed to monitor bidirectional currents over a wide common mode range. The LT1999 is offered in three gain options: 10V/V, 20V/V, and 50V/V. The LT1999 senses current via an external resistive shunt and generates an output voltage, indicating both magnitude and direction of the sensed current. The output voltage is referenced halfway between the supply voltage and ground, or an external voltage can be used to set the reference level. With a 2MHz bandwidth and a common mode input range of –5V to 80V, the LT1999 is suitable for monitoring currents in H-Bridge motor controls, switching power supplies, solenoid currents, and battery charge curr...