Analog Devices Inc. LTC1150CS8#TRPBF

Overview

LTC1150CS8#TRPBF from Analog Devices (formerly Linear Technology) is a high-voltage, zero-drift chopper-stabilized operational amplifier in an 8-lead SOIC package. It delivers ±0.5µV typical input offset voltage, 0.01µV/°C drift, 1.8µV_P-P (0.1Hz–10Hz) input noise, 135dB minimum open-loop gain, and operates from ±2.375V to ±16V supplies or single 4.75V–32V rails. It is used in precision strain gauge amplifiers and thermocouple signal conditioning where microvolt-level DC accuracy is critical.

For engineers reviewing the LTC1150CS8#TRPBF datasheet, LTC1150CS8#TRPBF pinout, LTC1150CS8#TRPBF application, or LTC1150CS8#TRPBF equivalent, key selection considerations include its integrated sample-and-hold capacitors, programmable supply current via Pin 1, internal 2.2kHz clock output, and guaranteed 110dB CMRR over temperature - all essential for low-drift, low-noise instrumentation designs.

Technical Context

The LTC1150CS8#TRPBF implements a proprietary high-voltage CMOS chopper architecture with on-chip sampling capacitors, eliminating external components required by conventional chopper amplifiers. Its auto-zeroing loop corrects input offset and drift continuously, enabling sub-microvolt DC stability.

It supports dual- or single-supply operation with rail-to-rail input common-mode range including ground, and features two operating modes: default (800µA supply current, 550Hz chopping) and low-power (200µA, 300Hz chopping) when Pin 1 is tied to V–. The internal oscillator can be overridden by an AC-coupled external clock applied to Pin 5.

Key Specifications

Pinout & Package

Package: 8-lead plastic SOIC (S8), 150-mil width, JEDEC MS-012AC compliant, θ_JA = 130°C/W, rated for –40°C to +85°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD8551ARZ and LTC2057HS8#PBF, the LTC1150CS8#TRPBF uniquely combines integrated clock synchronization, programmable supply current, and the lowest drift (±0.01µV/°C) - making it optimal for battery-powered, multi-sensor systems demanding long-term DC stability without recalibration.

Availability

LTC1150CS8#TRPBF is available at Aetrix Electronics and suitable for precision instrumentation, medical diagnostics equipment, and industrial process control systems requiring stable component supply across extended production lifecycles.

Supply support for LTC1150CS8#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 technologies.

The LTC1150CS8#TRPBF belongs to Linear's legacy zero-drift op amp family, designed specifically for ultra-precision DC-coupled measurement applications where traditional bipolar or JFET op amps fail due to drift and 1/f noise.

FAQ

What is the maximum total supply voltage rating for the LTC1150CS8#TRPBF?

The LTC1150CS8#TRPBF has an absolute maximum total supply voltage (V+ to V–) of 32V. This allows operation from ±15V rails or single 24V/32V industrial supplies. Exceeding this voltage risks permanent damage. Derating is recommended for long-term reliability at elevated temperatures per the device's 110°C junction limit.

How does Pin 1 (ISUPPLY) affect the performance of the LTC1150CS8#TRPBF?

Pin 1 controls supply current: left open or tied to V+ sets 800µA (typical), while tying to V– reduces it to 200µA (typical). This trade-off lowers power consumption but also reduces internal sampling frequency from 550Hz to 300Hz, slightly increasing 0.1Hz–10Hz noise (to ~2.0µV_P-P) and offset drift (to ±0.05µV/°C max). The LTC1150CS8#TRPBF maintains full DC precision specifications in both modes.

Can the LTC1150CS8#TRPBF synchronize with external clocks, and what are the requirements?

Yes - applying an AC-coupled external clock to Pin 5 (EXT CLOCK IN) overrides the internal oscillator. The input must exceed 2V_PP, reside within the supply rails, and have non-critical duty cycle. The internal chopping frequency equals the external clock divided by four. Below 100Hz external input, the LTC1150CS8#TRPBF reverts to its internal 550Hz mode. This feature enables precise phase alignment across multiple LTC1150CS8#TRPBF units in multi-channel DAQ systems.

What is the purpose of Pin 8 (CLOCK OUT) on the LTC1150CS8#TRPBF, and how is it used?

Pin 8 outputs the internal oscillator signal at ~2.2kHz (four times the chopping frequency), with logic levels at V_H = V_S and V_L = V_S–4.6V. When driven by an external clock, Pin 8 is pulled high to V_S. This output serves as a master clock to synchronize other LTC1150CS8#TRPBF devices (up to 100 slaves), eliminating beat frequencies and inter-channel aliasing in multi-amplifier systems - a capability not found in most zero-drift op amps.

Does the LTC1150CS8#TRPBF require external capacitors for chopper operation?

No - the LTC1150CS8#TRPBF integrates both sample-and-hold capacitors on-die, eliminating the two external 100pF–1nF capacitors required by most chopper-stabilized op amps. This reduces PCB area, component count, and layout sensitivity to parasitic capacitance. The integration is a defining feature of the LTC1150CS8#TRPBF, confirmed in the datasheet's "no external components required" claim and functional block diagram.