Analog Devices Inc. LTC2055CMS8#TRPBF

Overview

LTC2055CMS8#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 drift, and rail-to-rail output swing across ±5 V or single 2.7–6 V supplies - enabling precision current sensing and thermocouple amplification in battery-powered instrumentation.

For engineers reviewing the LTC2055CMS8#TRPBF datasheet, LTC2055CMS8#TRPBF pinout, LTC2055CMS8#TRPBF application, or LTC2055CMS8#TRPBF equivalent, key selection criteria include guaranteed –40°C to 85°C operation, 130 μA per amplifier supply current, 500 kHz gain-bandwidth product, and compatibility with low-noise, high-DC-accuracy signal chains requiring <1.6 μV_P-P (0.01–10 Hz) noise performance.

Technical Context

The LTC2055CMS8#TRPBF implements auto-zeroing architecture with a 1 kHz internal clock to suppress DC offset and drift, achieving near-zero long-term drift without chopper modulation artifacts. Its input stage supports common-mode voltage 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 PSRR and CMRR, and rail-to-rail output swing into 5 kΩ loads - all while maintaining 1.6 μV_P-P (0.01–10 Hz) input-referred noise and 0.5 V/μs slew rate for stable closed-loop behavior in precision DC-coupled applications.

Key Specifications

Pinout & Package

Package: 8-lead plastic MSOP (MS8), 3.00 mm × 3.00 mm × 0.889 mm, 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 AD8629ARZ and LTC2055HVCMS8#TRPBF, the LTC2055CMS8#TRPBF offers optimal balance of dual-channel integration, guaranteed –40°C to 85°C performance, and lowest power (130 μA/amp) for space-constrained, battery-operated precision analog front-ends.

Availability

LTC2055CMS8#TRPBF is available at Aetrix Electronics and suitable for thermocouple amplification, electronic scales, medical instrumentation, low-side current sense, and high-resolution data acquisition requiring stable component supply across industrial temperature grades.

Supply support for LTC2055CMS8#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 acquired Linear Technology in 2017 and maintains its precision analog portfolio, including zero-drift op amps designed for metrology-grade accuracy and reliability.

The LTC2055CMS8#TRPBF belongs to Linear's zero-drift op amp family, engineered specifically for DC-accurate signal conditioning in instrumentation, industrial sensing, and medical diagnostics where long-term offset stability is non-negotiable.

FAQ

What is the maximum operating temperature range for the LTC2055CMS8#TRPBF?

The LTC2055CMS8#TRPBF is specified for operation from –40°C to +85°C (I-grade). This range is guaranteed per datasheet Electrical Characteristics tables and applies to all key DC parameters including input offset voltage, drift, and supply current. It does not support the extended –55°C to +150°C range offered by the MP-grade LTC2054MP variant.

Does the LTC2055CMS8#TRPBF require external capacitors for stability?

No, the LTC2055CMS8#TRPBF is unity-gain stable and does not require external compensation capacitors. Its internal architecture ensures phase margin >60° at unity gain. However, a 0.1 μF bypass capacitor between V+ and V– is recommended close to the pins to suppress high-frequency supply noise that could modulate the auto-zero clock feedthrough.

Can the LTC2055CMS8#TRPBF drive ADC inputs directly?

Yes, the LTC2055CMS8#TRPBF can directly drive SAR and sigma-delta ADC inputs due to its rail-to-rail output swing, low output impedance (<1 Ω typical), and 1.6 μV_P-P low-frequency noise. For 16-bit+ ADCs, use a small series resistor (10–50 Ω) and local 100 nF decoupling at the ADC input to prevent charge kickback errors.

What is the clock feedthrough level of the LTC2055CMS8#TRPBF at 1 kHz?

The LTC2055CMS8#TRPBF exhibits <0.2 μV_RMS input-referred clock feedthrough at 1 kHz - the frequency of its internal auto-zeroing clock. This residue appears as a narrow spectral spike and is suppressed by >40 dB using standard RC filtering or by placing a capacitor across the feedback resistor in inverting configurations.

Is the exposed pad on the MS8 package of the LTC2055CMS8#TRPBF required to be soldered?

The exposed pad on the LTC2055CMS8#TRPBF's MS8 package is internally connected to V– and may be left unsoldered, but Analog Devices recommends connecting it to the V– net via thermal vias for improved thermal dissipation and lower θ_JA (200°C/W vs >250°C/W without connection). No electrical functionality depends on this connection.