Analog Devices Inc. LTC2055HMS8#PBF

Overview

LTC2055HMS8#PBF from Analog Devices (formerly Linear Technology) is a dual, micropower, zero-drift operational amplifier in an 8-lead MSOP package, rated for operation from –40°C to 125°C. It delivers 3 μV max input offset voltage, 30 nV/°C max offset drift, 130 μA per amplifier supply current, and rail-to-rail output swing - enabling precision DC-coupled signal conditioning in battery-powered industrial sensors and medical instrumentation.

For engineers reviewing the LTC2055HMS8#PBF datasheet, LTC2055HMS8#PBF pinout, LTC2055HMS8#PBF application, or LTC2055HMS8#PBF equivalent, key selection criteria include guaranteed high-temperature performance (–40°C to 125°C), ultra-low DC error budget, micropower consumption under 150 μA/amp, and compatibility with single-supply (2.7–6 V) or split-supply (±2.5 V) configurations.

Technical Context

The LTC2055HMS8#PBF employs auto-zeroing architecture with a 1 kHz internal clock to continuously correct input offset and drift, achieving near-zero DC errors across temperature and common-mode voltage. Its input stage supports rail-to-rail common-mode range (V– to V+ – 0.5 V) and features 1 pA typical input bias current at 25°C.

It integrates a 500 kHz gain-bandwidth product and 0.5 V/μs slew rate, supporting stable closed-loop operation with gains up to 100 in low-noise, low-frequency applications. The device maintains 130 dB typical PSRR and CMRR, ensuring robust rejection of supply and common-mode disturbances in noisy environments.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (MS8), 3.0 mm × 3.0 mm × 0.85 mm body, 0.65 mm pitch, exposed pad internally connected to V–.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2055IMS8#PBF and AD8629ARZ, the LTC2055HMS8#PBF uniquely combines 125°C operation, micropower consumption (<155 μA/amp), and 3 μV offset - making it the sole option for high-reliability, thermally demanding embedded systems where both precision and ruggedness are non-negotiable.

Availability

LTC2055HMS8#PBF is available at Aetrix Electronics and suitable for industrial motor control, medical diagnostics, and aerospace telemetry systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC2055HMS8#PBF 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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.

The LTC2055 series belongs to Linear Technology's precision zero-drift op amp product line, engineered specifically for DC-accurate, low-power signal conditioning in harsh thermal environments and battery-constrained applications.

FAQ

What is the maximum operating temperature for the LTC2055HMS8#PBF?

The LTC2055HMS8#PBF is specified for continuous operation from –40°C to 125°C. This extended temperature grade is validated per the manufacturer's datasheet and applies across all electrical parameters including input offset voltage, drift, and supply current - making it suitable for under-hood automotive and industrial control applications where ambient temperatures exceed 105°C.

Does the LTC2055HMS8#PBF require external capacitors for stability?

No, the LTC2055HMS8#PBF is unity-gain stable and does not require external compensation capacitors. Its internal architecture ensures phase margin >60° with capacitive loads up to 100 pF. However, a 0.1 μF bypass capacitor between V+ and V– is recommended close to the MSOP pins to suppress supply noise and prevent oscillation in high-impedance layouts.

Can the LTC2055HMS8#PBF be used with a single 3.3V supply?

Yes, the LTC2055HMS8#PBF operates from a minimum 2.7 V single supply and is fully specified at 3.3 V. Its rail-to-rail output swings within 10 mV of both rails at 5 kΩ load, and its input common-mode range extends from V– to V+ – 0.5 V - enabling direct interface with 3.3 V microcontrollers and ADCs without level-shifting circuitry.

What is the clock feedthrough behavior of the LTC2055HMS8#PBF?

The LTC2055HMS8#PBF uses a 1 kHz auto-zeroing clock. Its input-referred clock feedthrough is <0.2 μV_RMS at 1 kHz. This residue appears at the output multiplied by closed-loop gain. To minimize impact in sensitive applications, keep source impedances <10 kΩ and consider adding a small capacitor (e.g., 10–100 pF) across the feedback resistor to limit bandwidth.

Is the exposed pad on the LTC2055HMS8#PBF package required to be soldered?

Yes, the exposed pad on the bottom of the LTC2055HMS8#PBF MSOP package is internally connected to V– and must be soldered to a PCB copper pour tied to the V– net. This connection is critical for thermal dissipation (θ_JA = 200°C/W), noise reduction, and ensuring specified PSRR and CMRR performance. Omitting the solder connection degrades thermal resistance by >40% and increases low-frequency noise.