Analog Devices Inc. LTC1992-5IMS8#TRPBF

Overview

LTC1992-5IMS8#TRPBF from Analog Devices (formerly Linear Technology) is a fixed-gain, fully differential amplifier with precise 5× 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, and maintains ±0.3% max gain error over –40°C to 85°C - ideal for precision single-ended-to-differential conversion in data acquisition front-ends.

For engineers reviewing the LTC1992-5IMS8#TRPBF datasheet, LTC1992-5IMS8#TRPBF pinout, LTC1992-5IMS8#TRPBF application, or LTC1992-5IMS8#TRPBF equivalent, key selection criteria include its 5× fixed gain accuracy, 4 MHz GBW at VS = ±5V, CLOAD stability up to 10,000 pF, low 1 mA max supply current, and MSOP-8 package compatibility with space-constrained signal conditioning layouts.

Technical Context

The LTC1992-5IMS8#TRPBF implements a fully differential architecture with separate internal common-mode feedback to ensure balanced +OUT/–OUT phase response and suppress second-order harmonics. Its VOCM pin directly sets output common-mode level independently of input common-mode range, enabling seamless level shifting between systems with mismatched supply domains.

It features precision on-chip resistors for stable 5× differential gain (±0.1% typical gain error), supports rail-to-rail inputs from (–VS – 0.1V) to (+VS – 1.3V), and maintains DC-coupled performance with <2.5 mV max differential input offset voltage across temperature. The amplifier remains stable without external compensation for capacitive loads up to 10,000 pF.

Key Specifications

Pinout & Package

Package: 8-lead plastic MSOP (3 mm × 3 mm, 0.65 mm pitch), rated for –40°C to 85°C operating temperature.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD8138ARMZ and THS4561IRGET, the LTC1992-5IMS8#TRPBF uniquely integrates precision 5× gain, VOCM control, and rail-to-rail operation in a low-power MSOP-8 package - making it optimal for DC-coupled, space-constrained industrial and medical signal conditioning where gain accuracy and level-shifting flexibility are mandatory.

Availability

LTC1992-5IMS8#TRPBF is available at Aetrix Electronics and suitable for industrial process monitoring, medical biosignal acquisition, and high-precision data acquisition systems requiring stable component supply, extended temperature support (–40°C to 85°C), and long-term BOM continuity.

Supply support for LTC1992-5IMS8#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 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 applications demanding accurate gain, excellent output balance, and robust capacitive-load drive without external compensation.

FAQ

What is the guaranteed gain accuracy of the LTC1992-5IMS8#TRPBF over temperature?

The LTC1992-5IMS8#TRPBF guarantees ±0.3% maximum differential gain error over the full operating temperature range of –40°C to 85°C. This specification is achieved using laser-trimmed on-chip thin-film resistors and applies to all units in the I-grade (industrial) temperature range, ensuring consistent performance in harsh environments without system-level calibration.

Can the LTC1992-5IMS8#TRPBF operate from a single 3.3V supply?

Yes, the LTC1992-5IMS8#TRPBF is fully specified for single-supply operation down to 2.7V. At 3.3V, it maintains rail-to-rail input common-mode range (–0.1V to 2.0V), ±10 mA output drive, and 5× gain accuracy. Output swing reaches within 200 mV of each rail under 10 mA load, delivering >2.9 V_P-P differential output - sufficient for driving most 3.3V-domain differential ADCs.

How does the VOCM pin function in the LTC1992-5IMS8#TRPBF?

The VOCM pin on the LTC1992-5IMS8#TRPBF directly sets the output common-mode voltage (VOUTCM = (+VOUT + –VOUT)/2) independently of the input common-mode voltage. Applying a voltage between (–VS + 0.5V) and (+VS – 1.3V) to VOCM forces the outputs to center at that level - enabling seamless interfacing to ADCs with fixed VCM requirements (e.g., 1.25V or 2.5V) regardless of input signal's DC offset.

Is the LTC1992-5IMS8#TRPBF stable with large capacitive loads?

Yes, the LTC1992-5IMS8#TRPBF is internally compensated and remains unity-gain stable with capacitive loads up to 10,000 pF. This eliminates the need for external series isolation resistors when driving ADC inputs (typically 10–50 pF) or long PCB traces, preserving signal integrity and phase matching between +OUT and –OUT without degrading settling time or increasing THD.

What is the input resistance seen at the +IN and –IN pins of the LTC1992-5IMS8#TRPBF?

The LTC1992-5IMS8#TRPBF presents a differential input resistance of approximately 45 kΩ (22.5 kΩ per input pin to ground) due to its internal resistor network configured for G = 5. This value is consistent across temperature and matches the datasheet specification for the LTC1992-5 variant - important for calculating loading effects when interfacing with high-impedance sources like piezoelectric sensors or passive filters.