Analog Devices Inc. LTC1152IS8#TRPBF

Overview

LTC1152IS8#TRPBF from Analog Devices (formerly Linear Technology) is a precision zero-drift operational amplifier with rail-to-rail input and output, designed for high-accuracy signal conditioning in low-voltage systems. It delivers 10 µV max input offset voltage, 100 nV/°C max offset drift, 115 dB min CMRR, 0.7 MHz gain-bandwidth product, and operates from 2.7 V to 14 V total supply voltage - enabling use in single-supply 3 V/5 V data acquisition front-ends.

For engineers reviewing the LTC1152IS8#TRPBF datasheet, LTC1152IS8#TRPBF pinout, LTC1152IS8#TRPBF application, or LTC1152IS8#TRPBF equivalent, key selection criteria include verified rail-to-rail CMR beyond both rails (±0.3 V), shutdown current ≤5 µA, C-Load™ capacitive drive capability, and SO-8 package compatibility with standard op amp footprints.

Technical Context

The LTC1152IS8#TRPBF employs an internal 4.7 MHz charge pump to extend input common-mode range beyond both supply rails, eliminating crossover distortion and enabling true unity-gain buffering of 0–5 V signals on single 5 V supplies. Its self-nulling architecture samples at 2.3 kHz to correct input offset in real time, achieving ±1 µV typical offset over temperature and full CMR.

It integrates a high-impedance shutdown pin (Pin 1) that reduces supply current to ≤5 µA and places the output in high-Z state, supporting multiplexed configurations. The output stage maintains rail-to-rail swing into 1 kΩ loads and supports external compensation via Pin 5 (COMP) for infinite capacitive load drive using a 0.1 µF capacitor.

Key Specifications

Pinout & Package

Package: 8-lead plastic SOIC (SO-8), JEDEC MS-012, body width 3.9 mm, lead pitch 1.27 mm - compatible with standard op amp PCB footprints and reflow assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2050IS8#TRPBF and AD8628ARZ, the LTC1152IS8#TRPBF uniquely combines rail-to-rail input *beyond* both supplies with integrated charge pump and C-Load™ drive - making it the only choice for true unity-gain buffering and high-side sensing in 3–5 V systems.

Availability

LTC1152IS8#TRPBF is available at Aetrix Electronics and suitable for high-accuracy data acquisition systems, rail-to-rail sensor signal conditioning, and low-power industrial monitoring requiring stable component supply across extended temperature ranges.

Supply support for LTC1152IS8#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.

The LTC1152IS8#TRPBF belongs to Linear's zero-drift op amp family, engineered specifically for precision DC-coupled applications demanding nanovolt-level stability, rail-to-rail operation, and robustness in low-voltage, space-constrained designs.

FAQ

What is the operating temperature range for the LTC1152IS8#TRPBF?

The LTC1152IS8#TRPBF is specified for industrial operation from –40°C to +85°C. This is confirmed by the "I" grade suffix in the part number and documented in the Absolute Maximum Ratings table, where the operating temperature range for LTC1152I is explicitly listed as –40°C to 85°C. The SO-8 package has a thermal resistance θ_JA of 200°C/W, supporting reliable performance within this range under typical PCB layouts.

Does the LTC1152IS8#TRPBF require external components for rail-to-rail input operation?

No, the LTC1152IS8#TRPBF does not require external components for rail-to-rail input operation. Its internal 4.7 MHz charge pump generates a boosted voltage (~7.3 V above V+ at 5 V supply) to power the input stage, enabling input common-mode range to extend 0.3 V beyond both V+ and V–. This is explicitly stated in the Features list and Functional Description sections, and confirmed by the "No External Components Required" bullet.

Can the LTC1152IS8#TRPBF drive large capacitive loads without oscillation?

Yes, the LTC1152IS8#TRPBF can drive arbitrarily large capacitive loads stably using external compensation. Connecting a 0.1 µF capacitor between Pin 5 (COMP) and Pin 6 (OUT) enables infinite capacitive load drive, as detailed in the Compensation/Bandwidth Limiting section and Figure 3. This C-Load™ feature is a defining characteristic of the LTC1152IS8#TRPBF and eliminates the need for series isolation resistors in ADC driver applications.

What is the function of Pin 8 (CP) on the LTC1152IS8#TRPBF?

Pin 8 (CP) is the internal charge pump output node. It provides the boosted voltage (~7.3 V above V+ at 5 V supply) used to bias the input stage, enabling rail-to-rail input operation. While no external connection is required, adding a 0.1 µF capacitor from CP to V+ reduces 4.7 MHz charge pump feedthrough noise on the output - a recommended practice for sensitive low-noise applications per the Applications Information section.

How does the shutdown feature of the LTC1152IS8#TRPBF affect output behavior?

When Pin 1 (SHDN) is pulled low, the LTC1152IS8#TRPBF enters shutdown mode: supply current drops to ≤5 µA, internal clocks halt, and the output stage enters a high-impedance (high-Z) state. This allows multiple LTC1152IS8#TRPBF units to be wired in parallel for multiplexing, with only the active channel driving the shared output bus - a capability explicitly described in the Shutdown section and illustrated in Typical Application TA04.