LT1991HDD#TRPBF

Instrumentation, Op Amps, Buffer Amps Overview

The LT1991HDD#TRPBF is a precision programmable gain amplifier in a 10-lead DFN package. It integrates an op amp with matched internal resistors for gains of 1, 3, and 9. The H-grade variant operates from -40°C to +125°C. It supports single or split supplies from 2.7V to 36V. Key electrical parameters include a 560kHz gain bandwidth product, 100µA supply current, and rail-to-rail output swing.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Integrates precision matched SiChrome resistors for high common-mode rejection
• Configurable as difference, inverting, or noninverting amplifiers
• Rail-to-rail output capability minimizes signal loss near supply rails

Instrumentation, Op Amps, Buffer Amps Applications

• Handheld instrumentation
• Medical instrumentation
• Strain gauge amplifiers
• Differential to single-ended conversion

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific temperature grade suffix (H) matches the required operating range. Confirm the DD package designation corresponds to the 10-lead DFN form factor. Ensure the TRPBF suffix indicates tape and reel packaging for automated assembly processes.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when board space is limited and multiple gain configurations are needed without external resistor networks. The integrated matching eliminates calibration requirements for many applications. Verify input voltage ranges against the specific supply configuration used.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the LT1991 family of programmable gain amplifiers. It combines a precision operational amplifier with laser-trimmed internal resistors. The design simplifies circuit topology by reducing the number of external components required for standard amplifier configurations.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

LT1991CDD#TRPBF

Instrumentation, Op Amps, Buffer Amps FAQ

How is the gain configured?

Gain is set by connecting the P and M inputs (P1/P3/P9 and M1/M3/M9) to ground, floating, or feedback paths to utilize the internal 1x, 3x, and 9x resistor networks.

What is the maximum input voltage on P1/M1 pins?

The P1 and M1 inputs can withstand voltages up to ±60V, provided other constraints like supply voltage and output clipping are respected.