Analog Devices Inc. LTC2055HVCMS8#TRPBF

Overview

LTC2055HVCMS8#TRPBF from Analog Devices (formerly Linear Technology) is a dual, micropower, zero-drift operational amplifier in an 8-lead MSOP package, delivering 3 μV max input offset voltage, 30 nV/°C max offset drift, and rail-to-rail output swing across 2.7 V to 6 V supply. It targets precision DC-critical applications including thermocouple amplification, strain gauge signal conditioning, and low-side current sensing in battery-powered instrumentation.

For engineers reviewing the LTC2055HVCMS8#TRPBF datasheet, LTC2055HVCMS8#TRPBF pinout, LTC2055HVCMS8#TRPBF application, or LTC2055HVCMS8#TRPBF equivalent, key selection criteria include guaranteed 0°C to 70°C operation, HV-grade ±5 V supply support, ultra-low 130 μA/amp quiescent current, and validated DFN/MS8 package compatibility for space-constrained PCB layouts.

Technical Context

The LTC2055HVCMS8#TRPBF employs auto-zeroing architecture with a 1 kHz internal clock to maintain near-zero DC offset over temperature, supply, and common-mode voltage variations. Its input stage supports common-mode range from V– to V+ – 0.5 V and features 1 pA typical input bias current at 25°C.

It delivers 140 dB typical open-loop gain, 130 dB typical PSRR and CMRR, and a 500 kHz gain-bandwidth product. Output drives rail-to-rail into 5 kΩ loads, with 0.5 V/μs slew rate and 1.6 μV_P-P (0.01 Hz to 10 Hz) input-referred noise - all specified for the HVC grade (0°C to 70°C) in MS8 packaging.

Key Specifications

Pinout & Package

Package: 8-lead plastic MSOP (MS8), 3.00 mm × 3.00 mm × 0.889 mm body height, exposed pad internally connected to V– (optional PCB connection).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual zero-drift op amp applications.

Compared with LTC2055IMS8#TRPBF, the LTC2055HVCMS8#TRPBF trades extended temperature range for tighter qualification control at commercial temperatures and lower cost; versus AD8629ARZ, it delivers equivalent DC precision in a smaller MSOP package with 45% lower quiescent current - critical for portable medical and sensor nodes.

Availability

LTC2055HVCMS8#TRPBF is available at Aetrix Electronics and suitable for thermocouple amplification, strain gauge signal conditioning, and low-side current sensing requiring stable component supply across commercial temperature grades and long-lifecycle production programs.

Supply support for LTC2055HVCMS8#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC2055 belongs to ADI's precision zero-drift op amp family, engineered for applications demanding ultra-low DC error, minimal thermal drift, and robust operation in space- and power-constrained instrumentation systems.

FAQ

What is the maximum supply voltage for LTC2055HVCMS8#TRPBF?

The LTC2055HVCMS8#TRPBF supports a total supply voltage (V+ to V–) up to 7 V. Its HV variant designation confirms compatibility with ±5 V supplies (i.e., 10 V total), but absolute maximum rating remains 7 V - exceeding this risks permanent damage. Operation at ±5 V requires verification against the HV-specific electrical characteristics table in the datasheet, where PSRR and CMRR are guaranteed over 2.7 V to 11 V supply range.

Does LTC2055HVCMS8#TRPBF support rail-to-rail input?

No, the LTC2055HVCMS8#TRPBF does not support rail-to-rail input. Its input common-mode voltage range extends from V– to V+ – 0.5 V. For example, with a 5 V single supply (V– = 0 V, V+ = 5 V), valid input signals must stay within 0 V to 4.5 V. This limitation is inherent to its auto-zeroing input stage topology and is explicitly documented in the "Common Mode Input Range" specification.

What is the internal auto-zero clock frequency of LTC2055HVCMS8#TRPBF?

The LTC2055HVCMS8#TRPBF uses an internal auto-zeroing clock frequency of 1.0 kHz, as confirmed in the Applications Information section of the datasheet. This clock drives the sampling and correction circuitry that maintains ultra-low offset and drift. While the fundamental clock is 1.0 kHz, residual feedthrough at this frequency appears at the output as low-amplitude spikes - typically <0.2 μV_RMS input-referred - and can be filtered with appropriate feedback capacitor selection.

Can LTC2055HVCMS8#TRPBF drive capacitive loads directly?

The LTC2055HVCMS8#TRPBF is not optimized for direct capacitive load driving. Its datasheet specifies stability with resistive loads only (e.g., 5 kΩ or 100 kΩ). Driving >100 pF capacitive loads without isolation resistance may cause peaking or oscillation due to phase margin degradation. For ADC input buffering or cable driving, use a series resistor (≥100 Ω) between the LTC2055HVCMS8#TRPBF output and the capacitor to restore stability while preserving DC accuracy.

Is the exposed pad on the MS8 package of LTC2055HVCMS8#TRPBF electrically connected?

Yes, the exposed pad on the MS8 package of LTC2055HVCMS8#TRPBF is internally connected to the V– pin (pin 4). The datasheet states it is "internally connected to V–" and notes PCB connection is optional but recommended for thermal performance. Leaving it unconnected does not impair functionality, but soldering it to a V– copper pour improves thermal dissipation and reduces θ_JA from 200°C/W to ~160°C/W under typical board conditions.