LT1990AHS8#TRPBF

Instrumentation, Op Amps, Buffer Amps Overview

The LT1990AHS8#TRPBF is a micropower precision difference amplifier manufactured by Analog Devices Inc. It features pin-selectable gains of 1 or 10 and operates with a wide supply range from 2.7V to 36V. The device supports a high common mode voltage range, reaching ±250V on split supplies and an 85V window on single 5V supplies. It includes input protection against transients up to ±350V and differential voltages up to ±500V. Key electrical specifications include a maximum gain error of 0.28%, a minimum common mode rejection ratio of 70dB, and a maximum supply current of 120µA.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Pin-strapped selectable gain configuration for unity or ten-fold amplification
• High common mode input voltage capability exceeding standard supply rails
• Integrated fault protection for inputs against high voltage transients
• Micropower operation suitable for battery-powered instrumentation

Instrumentation, Op Amps, Buffer Amps Applications

• Battery cell voltage monitoring in multi-cell series configurations
• High-side and low-side current sensing using shunt resistors
• Signal acquisition in electrically noisy industrial environments
• Level sensing and isolation interfaces requiring high input impedance

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix 'HS8' corresponds to the required industrial temperature grade and SOIC-8 package variant. Confirm that the '#TRPBF' designation indicates lead-free tape and reel packaging compatible with automated surface mount assembly processes. Ensure the selected part number matches the exact gain and performance requirements defined in the design specifications.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when applications demand precise signal extraction from high common mode voltages without external resistor networks. The LT1990A variant offers tighter gain error specifications compared to standard versions. Consider the rail-to-rail output swing for maximizing dynamic range in low voltage single-supply systems. Evaluate the trade-off between the fixed internal gain options and the need for intermediate gain values.

Instrumentation, Op Amps, Buffer Amps Part Context

This device belongs to the LT1990 family of high voltage difference amplifiers designed for precision measurement tasks. The LT1990A sub-series provides enhanced accuracy metrics over the base LT1990 model. The HS8 suffix denotes the specific operating temperature range and plastic small outline package format used for surface mounting.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

LT1990AHSD#TRPBF (Quad Flat No-Lead Package)

Instrumentation, Op Amps, Buffer Amps FAQ

How is the gain of the LT1990 configured?

The gain is set via pins 5 and 8. Leaving these pins open results in a gain of 1. Connecting both pins to the reference input sets the gain to 10.

What is the maximum differential input voltage the device can withstand?

The inputs are protected against differential voltages up to ±500V, allowing safe operation even if large potential differences exist between the input terminals.