LTC2051IDD

Instrumentation, Op Amps, Buffer Amps Overview

The LTC2051IDD is a dual zero-drift operational amplifier manufactured by Linear Technology, housed in an 8-lead plastic DFN package measuring 3mm × 3mm. It operates from a single supply voltage ranging from 2.7V to ±5.5V with a typical supply current of 0.75mA per amplifier. The device features a maximum input offset voltage of 3μV and a maximum drift of 30nV/°C. It provides a typical open-loop gain of 140dB, PSRR and CMRR exceeding 130dB, and a gain-bandwidth product of 3MHz. The specified operating temperature range for this part number is –40°C to 85°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Utilizes autozeroing circuitry to achieve near-zero DC offset and drift across temperature and supply variations.
• Features rail-to-rail output capability capable of driving loads as low as 2kΩ to both supply rails.
• Supports extended common mode input range extending from the negative supply up to typically 1V below the positive supply.

Instrumentation, Op Amps, Buffer Amps Applications

• Thermocouple amplifiers
• Electronic scales
• Medical instrumentation
• Strain gauge amplifiers
• High resolution data acquisition

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix IDD against manufacturer documentation to confirm the –40°C to 85°C industrial temperature grade and DFN package type. Ensure compatibility with system power supplies within the 2.7V to ±5.5V range. Confirm that the 3mm × 3mm footprint aligns with PCB layout constraints and thermal requirements.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when ultralow offset voltage and drift are critical for precision signal conditioning. The dual configuration allows cost-effective implementation of differential stages or composite amplifier topologies. Consider the 3MHz bandwidth and 2V/μs slew rate for applications requiring moderate speed alongside high DC accuracy.

Instrumentation, Op Amps, Buffer Amps Part Context

The LTC2051 is part of a family of zero-drift operational amplifiers designed for space-constrained applications. It complements the quad-channel LTC2052 and offers performance comparable to larger packages while maintaining a small footprint. The device integrates internal sampling capacitors to eliminate external components for offset correction.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

LTC2051CMS8

Instrumentation, Op Amps, Buffer Amps FAQ

How does the LTC2051 handle clock feedthrough?

The device exhibits residue clock feedthrough of less than 1μV RMS input referred at 7.5kHz. Placing a capacitor across the feedback resistor can reduce this effect by limiting closed-loop bandwidth.

What is the behavior of the input bias current at elevated temperatures?

Above 70°C, leakage of ESD protection diodes increases input bias currents in the positive direction. Above 85°C, leakage current dominates, causing both input pins to draw current into the device.