Analog Devices Inc. LTC1992-2HMS8#PBF

Overview

LTC1992-2HMS8#PBF from Analog Devices (formerly Linear Technology) is a fixed-gain, fully differential amplifier with precise 2× differential gain, rail-to-rail input/output operation, and independent VOCM-controlled output common-mode voltage. It operates from 2.7V single supply to ±5V dual supply, delivers ±10mA output current, supports capacitive loads up to 10,000pF, and is rated for –40°C to +125°C industrial/automotive environments - ideal for precision ADC driver and single-ended-to-differential conversion in data acquisition systems.

For engineers reviewing the LTC1992-2HMS8#PBF datasheet, LTC1992-2HMS8#PBF pinout, LTC1992-2HMS8#PBF application, or LTC1992-2HMS8#PBF equivalent, key selection criteria include guaranteed ±0.3% max gain error over temperature, 2 V/V fixed gain accuracy, 4 MHz gain-bandwidth product, low 45 nV/√Hz input noise, and MSOP-8 package compatibility with high-density PCB layouts.

Technical Context

The LTC1992-2HMS8#PBF implements a fully differential architecture with separate internal common-mode feedback to ensure balanced output phase and reduced second-order harmonics. Its VOCM pin enables independent setting of output common-mode level regardless of input common-mode range, enabling seamless level shifting between mixed-supply domains.

It features precision on-chip resistors for stable 2× differential gain, rail-to-rail input operation from (–VS – 0.1V) to (+VS – 1.3V), and rail-to-rail outputs capable of sourcing/sinking ≥10mA. The device maintains stability with capacitive loads up to 10,000pF and exhibits ≤±0.3% gain error across –40°C to +125°C.

Key Specifications

Pinout & Package

Package: 8-Lead Plastic MSOP (3mm × 3mm, 0.65mm pitch), thermally enhanced for high-reliability operation at junction temperatures up to 150°C.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar differential amplifier applications.

Compared with AD8138ARMZ and THS4561IRGET, the LTC1992-2HMS8#PBF uniquely combines guaranteed ±0.3% gain error over –40°C to +125°C, integrated 2× gain resistors, and VOCM-based level shifting - making it the preferred choice for precision, temperature-stable, DC-coupled differential signal conditioning.

Availability

LTC1992-2HMS8#PBF is available at Aetrix Electronics and suitable for precision ADC driver, single-ended-to-differential conversion, and high-temperature level-shifting applications requiring stable component supply and long-term obsolescence management.

Supply support for LTC1992-2HMS8#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.

The LTC1992 family was designed by Linear Technology (acquired by ADI in 2017) specifically for precision, low-power, fully differential signal conditioning - targeting high-resolution data acquisition, sensor interfaces, and mixed-signal system interconnects where gain accuracy, noise, and temperature stability are critical.

FAQ

What is the maximum capacitive load the LTC1992-2HMS8#PBF can drive while remaining stable?

The LTC1992-2HMS8#PBF is specified stable for all capacitive loads up to 10,000pF without external compensation. This capability allows direct connection to high-input-capacitance ADCs (e.g., SAR or sigma-delta types) and long PCB traces without requiring series isolation resistors or complex compensation networks - a key advantage over many general-purpose op-amps that require careful layout or external components for stability.

Does the LTC1992-2HMS8#PBF support single-supply operation, and what is the minimum supply voltage?

Yes, the LTC1992-2HMS8#PBF supports true single-supply operation down to 2.7V. Its rail-to-rail input and output stages enable full signal swing from near ground to within ~100mV of the positive rail, making it suitable for low-voltage portable instrumentation and battery-powered sensor nodes. At 2.7V supply, it delivers ≥2.29V output high and ≤0.20V output low into 10mA load.

How does the VOCM pin function in the LTC1992-2HMS8#PBF, and why is it important?

The VOCM pin in the LTC1992-2HMS8#PBF sets the output common-mode voltage independently of the input common-mode level - enabling precise level shifting between mismatched signal domains (e.g., 0–2.5V single-ended to ±2.5V differential). This eliminates the need for AC coupling or external bias networks, preserves DC accuracy, and simplifies interface design with ADCs requiring specific VCM references such as 0V, 1.25V, or 2.5V.

What is the guaranteed gain accuracy of the LTC1992-2HMS8#PBF over temperature, and how is it achieved?

The LTC1992-2HMS8#PBF guarantees ±0.3% maximum differential gain error over the full –40°C to +125°C operating range. This accuracy is achieved using laser-trimmed, on-chip thin-film resistors integrated into the feedback network - eliminating drift and mismatch issues associated with discrete resistor solutions and ensuring consistent performance across harsh thermal environments without calibration.

Is the LTC1992-2HMS8#PBF pin-compatible with other members of the LTC1992 family, such as the LTC1992-1HMS8#PBF or LTC1992-5HMS8#PBF?

Yes, all LTC1992-xHMS8#PBF variants (including LTC1992-1HMS8#PBF, LTC1992-2HMS8#PBF, LTC1992-5HMS8#PBF, and LTC1992-10HMS8#PBF) share identical 8-pin MSOP packaging and pinout. This allows drop-in replacement across gain options during prototyping or production - enabling design flexibility and simplified BOM management while maintaining identical layout, thermal, and routing constraints.