LT1997HDF-3#PBF

Instrumentation, Op Amps, Buffer Amps Overview

The LT1997HDF-3#PBF is a precision, wide voltage range gain selectable amplifier combining an op amp with highly matched resistors in a 14-lead DFN package. It operates from 3.3V to 50V supplies with 350µA supply current and features rail-to-rail output. The device achieves gains from –13 to +14 with 0.006% accuracy at Gain = 1. Key electrical parameters include a 60µV maximum input offset voltage, 1.1MHz bandwidth at Gain = 1, and >91dB DC CMRR. It supports shutdown mode drawing 20µA and functions within a –40°C to 125°C temperature range.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Integrates precision operational amplifier with highly matched internal resistors for accurate amplification without external components
• Configurable as difference, inverting, or noninverting amplifier with pin-selectable gains
• Supports high common mode voltage ranges up to ±160V on specific input pins
• Includes low-power shutdown capability to minimize energy consumption during idle periods

Instrumentation, Op Amps, Buffer Amps Applications

• High side or low side current sensing
• Bidirectional wide common mode range current sensing
• High voltage to low voltage level translation
• Industrial data-acquisition front-ends
• Differential to single-ended conversion

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the H-grade suffix indicates the extended industrial temperature range of –40°C to 125°C. Confirm the DF package designation corresponds to the 14-lead (4mm × 4mm) plastic DFN form factor. Ensure RoHS compliance by checking for the PBF suffix. Cross-reference the part marking code 19973 with the specific datasheet revision to guarantee functional equivalence and parameter adherence.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when board space is limited and external resistor matching is undesirable. The H-grade variant is required for applications operating above 85°C. Verify that the internal resistor power dissipation limits are not exceeded under maximum common mode voltages. Consider the Over-The-Top operation region if input voltages exceed standard supply rails but remain within absolute maximum ratings.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the LT1997-3 family of precision amplifiers. It shares functionality with the I-grade version but offers extended temperature performance. The DFN package provides a compact footprint compared to the MSOP alternative. The device replaces discrete resistor networks and isolation circuits in signal conditioning paths.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

LT1997IDF-3#PBF: Lower temperature grade (-40°C to 85°C). LT1997IMS-3#PBF: Different MSOP package. LT1997HMS-3#PBF: Same temperature grade but different MSOP package.