LT1999IMS8-20F#TRPBF

Instrumentation, Op Amps, Buffer Amps Overview

The LT1999IMS8-20F#TRPBF is a high-speed precision current sense amplifier with a fixed gain of 20V/V. It monitors bidirectional currents over a common mode range of –5V to 80V using an external resistive shunt. The device features a 2MHz bandwidth, 3V/μs slew rate, and low power shutdown consuming less than 10μA. It operates from a 5V supply, drawing 1.55mA in active mode. The component includes an FMEA-engineered pinout option and is housed in an 8-lead MSOP package.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Bidirectional current sensing with smooth operation across the entire common mode voltage range
• High common mode rejection ratio exceeding 80dB at 100kHz for accurate signal processing
• Integrated shutdown mode significantly reduces power consumption for energy-efficient designs
• Robust input protection providing tolerance against electrostatic discharge events

Instrumentation, Op Amps, Buffer Amps Applications

• H-Bridge motor control systems
• Solenoid current monitoring
• Battery charge current measurement
• PWM control loops
• Fuse and MOSFET protection circuits

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix configuration matches the required temperature grade and pinout variant. Confirm that the FMEA-engineered pinout designation aligns with the target board layout requirements. Ensure the ordering information corresponds to the exact gain specification needed for the application circuit design.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this part when a fixed 20V/V gain is required for bidirectional current monitoring. Consider the wide common mode range if operating near or above the supply rail. Evaluate the shutdown feature if power conservation is critical during idle states. Verify thermal performance within the specified operating temperature range.

Instrumentation, Op Amps, Buffer Amps Part Context

This component belongs to the LT1999 family of high-voltage current sense amplifiers. The series offers multiple gain options including 10V/V and 50V/V variants. The IMS8 designation indicates the industrial temperature grade and MSOP package style. The 'F' suffix denotes the specific pinout engineered for failure mode effects analysis compliance.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

LT1999IMS8-10F#TRPBF

Instrumentation, Op Amps, Buffer Amps FAQ

How does the REF pin function?

The REF pin sets the output common mode level, typically biased to mid-supply via internal resistors, but can be overdriven by an external voltage source.

What is the purpose of the SHDN pin?

The SHDN pin enables a low-power shutdown mode when pulled low, reducing supply current to less than 10μA to minimize power consumption.