Analog Devices Inc. LT1211CS8#TRPBF

Overview

LT1211CS8#TRPBF from Analog Devices (formerly Linear Technology) is a dual, single-supply precision operational amplifier featuring 14MHz gain-bandwidth product, 7V/µs slew rate, and 275µV max input offset voltage at 25°C. It operates from 2.5V to 36V total supply, delivers ±20mA output drive, and supports rail-to-rail input (including ground) and near-rail output swing - ideal for high-accuracy signal conditioning in battery-powered instrumentation.

For engineers reviewing the LT1211CS8#TRPBF datasheet, LT1211CS8#TRPBF pinout, LT1211CS8#TRPBF application, or LT1211CS8#TRPBF equivalent, key selection criteria include its guaranteed 0.01% settling time (900ns for 2V step), low 12nV/√Hz input voltage noise, and specified performance across 3.3V, 5V, and ±15V supplies - critical for precision DAC I/V conversion, active filter design, and photo-diode amplification.

Technical Context

The LT1211CS8#TRPBF integrates input bias current cancellation circuitry to achieve ≤125nA max input bias current and ≤30nA max input offset current, enabling stable operation with high-impedance sources like photodiodes or sensor bridges. Its internal compensation ensures stability with capacitive loads up to 1000pF while maintaining ≥60° phase margin across temperature and supply variations.

It features dual independent amplifiers in an 8-pin SOIC package with separate V+ and V− rails per channel, supporting both inverting and non-inverting configurations. The device maintains DC precision (e.g., 6µV/°C max VOS drift) without external trimming, and its input common-mode range extends 0.3V below V− and 3.8V above V− on 5V supply - enabling true single-supply operation with ground-referenced inputs.

Key Specifications

Pinout & Package

LT1211CS8#TRPBF is housed in an 8-lead plastic SOIC (SO-8) surface-mount package with standard JEDEC MS-012AC footprint (5.0mm × 4.0mm, 1.27mm pitch). Thermal resistance θ_JA = 150°C/W in still air.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual precision op amp applications.

Compared with OP2177ARZ-REEL7 and AD8628ARZ-REEL7, LT1211CS8#TRPBF uniquely balances high-speed precision (14MHz/7V/µs) with robust output drive (±20mA) and single-supply usability - making it optimal for wideband sensor interfaces requiring both speed and accuracy without zero-drift complexity.

Availability

LT1211CS8#TRPBF is available at Aetrix Electronics and suitable for active filters, DAC current-to-voltage conversion, photo-diode amplifiers, battery-powered instrumentation, and precision signal conditioning requiring stable component supply across industrial, medical, and test equipment programs.

Supply support for LT1211CS8#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 LT1211CS8#TRPBF belongs to ADI's legacy Linear Technology precision op amp family, engineered for applications demanding simultaneous high speed, low noise, and DC accuracy - particularly where single-supply operation and rail-to-rail input simplify system design.

FAQ

What is the maximum supply voltage rating for LT1211CS8#TRPBF?

The LT1211CS8#TRPBF has an absolute maximum total supply voltage (V+ to V−) of 36V. It is fully functional down to 2.5V total supply and guaranteed over the full –40°C to +85°C operating range at this minimum. For continuous operation with thermal safety, the recommended maximum is 20.3V (±17.1V) in SO-8 package at 70°C ambient - derived from its 150°C max junction temperature and 150°C/W θ_JA.

Does LT1211CS8#TRPBF support true rail-to-rail output swing?

The LT1211CS8#TRPBF does not achieve full rail-to-rail output swing. On a 5V supply, its output swings to within 3mV of V− (ground) when sinking current, but only to ~4.0V (0.5V below V+) when sourcing 15mA. This near-rail capability - combined with rail-to-rail input - makes it highly effective in single-supply systems where ground-referenced inputs and low-side saturation are critical, such as sensor signal chains.

Can LT1211CS8#TRPBF operate from a 3.3V single supply?

Yes, LT1211CS8#TRPBF is fully specified and characterized for 3.3V single-supply operation. At 3.3V, it maintains 275µV max input offset voltage, 14MHz gain-bandwidth, and 7V/µs slew rate. Input common-mode range extends from –0.3V to +1.5V (relative to V−), and output swings from 0.003V to 2.3V (at 15mA sink/source), enabling compatibility with 3.3V logic and low-power microcontrollers.

What is the thermal resistance (θ_JA) of LT1211CS8#TRPBF in SO-8 package?

The LT1211CS8#TRPBF has a junction-to-ambient thermal resistance (θ_JA) of 150°C/W under standard JEDEC JESD51-7 conditions (single-layer board, no copper plane). This value is explicitly stated in the datasheet Note 3 for the S8 package. Designers must use this figure - not generic SO-8 defaults - when calculating worst-case junction temperature for reliability validation.

How does LT1211CS8#TRPBF handle capacitive loads?

The LT1211CS8#TRPBF is internally compensated for stability with capacitive loads up to 1000pF, as verified by overshoot and phase margin testing. At 1000pF, it exhibits ≤25% overshoot in unity-gain follower configuration. For loads >100pF, adding a small series resistor (10–50Ω) between output and capacitance improves transient response and reduces ringing - a practice confirmed in the datasheet's "Capacitive Load Handling" graph (G12).