Analog Devices Inc. LTC1992-5IMS8#PBF

Overview

LTC1992-5IMS8#PBF 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 - used in precision single-ended-to-differential conversion for ADC drivers in industrial data acquisition systems.

For engineers reviewing the LTC1992-5IMS8#PBF datasheet, LTC1992-5IMS8#PBF pinout, LTC1992-5IMS8#PBF application, or LTC1992-5IMS8#PBF equivalent, key selection criteria include guaranteed 5× gain accuracy, VOCM-adjustable common-mode level, C_LOAD-stable operation up to 10,000pF, low 1mA max supply current, and MSOP-8 package compatibility with space-constrained signal chain layouts.

Technical Context

The LTC1992-5IMS8#PBF implements a fully differential architecture with separate internal common-mode feedback for phase-balanced outputs and reduced second-order harmonics. Its precision on-chip resistor network sets the fixed 5× differential gain, eliminating external gain-setting components while ensuring ±0.3% max gain error across temperature.

It supports rail-to-rail input common-mode range (–V_S to +V_S – 1.3V) and rail-to-rail output swing, with VOCM pin enabling independent setting of output common-mode voltage regardless of input common-mode level - critical for interfacing with differential-input ADCs requiring specific reference-centered output levels.

Key Specifications

Pinout & Package

8-Lead Plastic MSOP (MS8) package, 3mm × 3mm, 0.65mm pitch, exposed pad optional for thermal enhancement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD8138ARZ and LTC6409IUD#PBF, the LTC1992-5IMS8#PBF uniquely combines factory-trimmed 5× gain, VOCM-adjustable common mode, and 1mA max quiescent current - making it optimal for precision, low-power, DC-coupled differential signal conditioning where gain accuracy and interface flexibility are prioritized over ultra-high speed.

Availability

LTC1992-5IMS8#PBF is available at Aetrix Electronics and suitable for industrial data acquisition, medical instrumentation, and portable test equipment requiring stable component supply, extended temperature operation (–40°C to 85°C), and lead-free compliance.

Supply support for LTC1992-5IMS8#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 Analog Devices (originally Linear Technology) to address precision, low-power, fully differential signal conditioning needs - specifically targeting high-resolution ADC driver, sensor interface, and level-shifting applications where gain accuracy, common-mode control, and rail-to-rail operation are critical.

FAQ

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

The LTC1992-5IMS8#PBF guarantees ±0.3% maximum differential gain error across the full operating temperature range of –40°C to 85°C. This specification is achieved via laser-trimmed on-chip resistors and is explicitly validated per the datasheet's Electrical Characteristics table for the I-grade (industrial) version. The LTC1992-5IMS8#PBF does not require external gain-setting components to maintain this accuracy.

Can the LTC1992-5IMS8#PBF operate from a single 2.7V supply?

Yes, the LTC1992-5IMS8#PBF is fully specified for single-supply operation down to 2.7V. At this voltage, it maintains rail-to-rail input common-mode range (–V_S to +V_S – 1.3V), rail-to-rail output swing, and 1mA maximum supply current. The LTC1992-5IMS8#PBF also supports dual supplies up to ±5V, offering design flexibility across low-voltage and bipolar signal chain architectures.

What is the function of the VMID pin on the LTC1992-5IMS8#PBF?

The VMID pin on the LTC1992-5IMS8#PBF provides a buffered internal mid-supply reference voltage - typically 2.44V to 2.56V when +VS = 2.7V to 5V and –VS = 0V. It is not an input or control pin but a low-impedance output usable for biasing external circuitry (e.g., comparator references or sensor excitation). The LTC1992-5IMS8#PBF datasheet specifies VMID accuracy and load regulation under defined conditions.

Does the LTC1992-5IMS8#PBF require external compensation for stability?

No, the LTC1992-5IMS8#PBF is internally compensated and stable for all capacitive loads up to 10,000pF without external components. This is confirmed in the datasheet's Features section and Electrical Characteristics (C_LOAD stability specification). The LTC1992-5IMS8#PBF eliminates the need for series isolation resistors or external compensation networks - simplifying layout and improving reliability in high-capacitance routing scenarios.

How does the VOCM pin affect output common-mode voltage in the LTC1992-5IMS8#PBF?

The VOCM pin on the LTC1992-5IMS8#PBF directly sets the output common-mode voltage (V_OUTCM = (+V_OUT + –V_OUT)/2) independently of the input common-mode voltage. When a voltage is applied to VOCM, the LTC1992-5IMS8#PBF forces the average of its differential outputs to match that voltage - enabling precise level shifting for ADC interface matching. The LTC1992-5IMS8#PBF supports VOCM input from (–V_S + 0.5V) to (+V_S – 1.3V) with ±12mV max common-mode offset error.