LT1787IMS8#TR

Instrumentation, Op Amps, Buffer Amps Overview

The LT1787IMS8#TR is a micropower precision high-side current sense amplifier manufactured by Analog Devices Inc. It operates from a total supply voltage of 2.5V to 36V and features a fixed gain of 8 V/V. The device provides bidirectional current sensing with an input offset voltage of 40µV (typical) and a maximum of 125µV in the MSOP package. It delivers greater than 12-bit dynamic range, drawing only 60µA of operating current. The part includes input noise filtering capabilities and is available in an 8-lead MSOP package.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Monitors bidirectional currents via an external sense resistor
• Provides unidirectional or bidirectional output options
• Features user-selectable external sense resistor for optimized dynamic range
• Includes provisions for input noise filtering

Instrumentation, Op Amps, Buffer Amps Applications

• Battery monitoring
• Power monitoring
• Portable phones
• Cellular phones
• Portable test/measurement systems

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix #TR indicates tape and reel packaging when ordering. Confirm the IMS8 designation corresponds to the industrial temperature grade (-40°C to 85°C) and the MSOP package style. Ensure compatibility with the required supply voltage range of 2.5V to 36V for the standard LT1787 variant.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component for applications requiring precise high-side current monitoring with low power consumption. The fixed internal gain simplifies design compared to programmable alternatives. Consider the 40µV typical input offset voltage for high-resolution requirements. Verify that the 36V maximum supply voltage meets system constraints, as higher voltages require the LT1787HV variant.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the LT1787 family of micropower precision current sense amplifiers. It is designed for monitoring current into or out of batteries and other elements. The series offers both standard and high-voltage versions, packaged in 8-lead SO and MSOP formats. It is intended for use in portable and battery-operated systems where power efficiency and accuracy are critical.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

LT1787IMS8#PBF is the lead-free tube version of the same electrical specification.

Instrumentation, Op Amps, Buffer Amps FAQ

How is bidirectional current sensing achieved?

Bidirectional sensing is achieved by connecting the VBIAS pin to an external bias voltage or ground, allowing the VOUT signal to swing above or below VBIAS depending on the direction of current flow through the sense resistor.

What is the purpose of the FIL+ and FIL- pins?

The FIL+ and FIL- pins allow for input noise filtering. Connecting a capacitor between these pins creates a single-pole low-pass filter to eliminate aliasing errors from fast current ripple or transients.