LT1999HMS8-20#TRPBF

Instrumentation, Op Amps, Buffer Amps Overview

The LT1999HMS8-20#TRPBF is a high-speed, bidirectional current sense amplifier manufactured by Analog Devices Inc. It features a fixed gain of 20V/V and operates from an independent 5V supply with a typical quiescent current of 1.55mA. The device supports a wide common mode input range from –5V to 80V and provides a buffered voltage output referenced to the REF pin. Key electrical specifications include a 2MHz bandwidth, a maximum input offset voltage of 1.5mV, and a shutdown mode drawing less than 10µA. It is housed in an 8-lead MSOP package and is rated for operation over the extended temperature range of –40°C to 125°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Bidirectional current monitoring via external resistive shunt
• Wide common mode input range extending from negative voltages to 80V
• Integrated low power shutdown capability
• High immunity to electromagnetic interference and ESD events

Instrumentation, Op Amps, Buffer Amps Applications

• H-Bridge motor control systems
• Switching power supply current monitoring
• Solenoid current sensing
• Battery charge current measurement

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify that the specific suffix #TRPBF corresponds to the tape and reel packaging format required for automated assembly processes. Confirm the H-grade designation aligns with the necessary operating temperature range of –40°C to 125°C for the target application environment. Ensure compatibility with the 8-lead MSOP footprint during PCB layout verification.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when a fixed 20V/V gain is appropriate for the signal conditioning requirements. Consider the 2MHz bandwidth for applications requiring fast transient response. Evaluate the –5V to 80V common mode range against the system's highest potential voltage levels. Verify that the 5V supply constraint fits within the available power rails.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the LT1999 family of high-voltage current sense amplifiers, which includes variants with gains of 10V/V and 50V/V. The 'H' suffix denotes the industrial extended temperature grade, while 'MS8' specifies the 8-lead Mini-SOP package type. The '#TRPBF' suffix indicates lead-free finish and tape-and-reel delivery.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

LT1999HMS8-10#TRPBF (10V/V Gain)

Instrumentation, Op Amps, Buffer Amps FAQ

How does the SHDN pin function?

Pulling the SHDN pin below 0.5V activates the low-power shutdown mode. Leaving it floating allows an internal pull-up to maintain active operation.

What determines the output reference level?

The output is level-shifted relative to the voltage present on the REF pin, which defaults to mid-supply but can be externally driven.