LT1994MPDD#TRPBF

Instrumentation, Op Amps, Buffer Amps Overview

The LT1994MPDD#TRPBF is a low noise, low distortion fully differential input/output amplifier optimized for single-supply operation. It features a wide supply range from 2.375V to 12.6V and draws 13.3mA of supply current. The device offers a gain-bandwidth product of 70MHz and a slew rate of 65V/μs. It provides rail-to-rail output swing with an output current capability of up to 85mA. The part includes a hardware shutdown feature reducing consumption to 225μA and operates within a temperature range of –55°C to 125°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Fully differential input and output architecture with adjustable output common mode voltage
• Low noise performance with 3nV/√Hz input referred voltage noise density
• Hardware shutdown pin for significant power reduction in standby states
• Rail-to-rail output swing capability on supplies as low as 2.375V

Instrumentation, Op Amps, Buffer Amps Applications

• Driving differential input single-supply analog-to-digital converters (ADCs)
• Single-ended to differential signal conversion with common mode level shifting
• Differential amplification with common mode translation
• Low voltage, low noise differential signal processing

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific MP grade designation ensures the extended operating temperature range of –55°C to 125°C is required for the application environment. Confirm the DD package variant matches the PCB footprint requirements. Ensure the TRPBF suffix indicates tape and reel packaging compatible with automated assembly processes. Cross-reference the manufacturer's latest documentation for any potential lead-free finish or marking changes.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when high precision and low distortion are critical for interfacing ground-referenced signals to differential ADCs. The internal common mode feedback path ensures accurate output phase balancing. Consider the 70MHz gain-bandwidth product for high-frequency applications. Verify that the 85mA output drive capability meets the load requirements without excessive heat dissipation in the DFN package.

Instrumentation, Op Amps, Buffer Amps Part Context

This component belongs to the LT1994 family of fully differential amplifiers designed for high-speed data acquisition systems. The MP grade specifically denotes the military-grade temperature extension compared to standard industrial or commercial variants. It serves as a bridge between single-ended sources and differential receivers, eliminating the need for external transformer-based solutions.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

LT1994HDD#TRPBF

Instrumentation, Op Amps, Buffer Amps FAQ

How does the VOCM pin function?

The VOCM pin sets the output common mode voltage level independently of the input common mode voltage. It can be overdriven by an external reference or left floating to utilize an internal resistive divider at mid-supply.

What is the effect of resistor mismatch on performance?

Mismatch in the feedback resistor pairs causes common-mode to differential conversion. Using resistors with tighter tolerances, such as 0.1%, improves common-mode rejection ratio significantly.