Analog Devices Inc. LTC1250CS8#PBF

Overview

LTC1250CS8#PBF from Analog Devices (acquired Linear Technology) is a precision zero-drift operational amplifier optimized for low-noise bridge transducer signal conditioning. It delivers 0.75 µV_P-P input-referred noise (0.1 Hz to 10 Hz), 10 µV max input offset voltage, and 110 dB min CMRR - enabling high-resolution strain gauge, thermocouple, and electronic scale applications with ±5 V supplies.

For engineers reviewing the LTC1250CS8#PBF datasheet, LTC1250CS8#PBF pinout, LTC1250CS8#PBF application, or LTC1250CS8#PBF equivalent, this page provides verified pin mapping, real-world noise performance data, supply current vs temperature behavior, output swing limits into 1 kΩ, and validated alternatives for instrumentation-grade DC-coupled amplification.

Technical Context

The LTC1250CS8#PBF uses a chopper-stabilized architecture with internal 5 kHz nulling clock to suppress 1/f noise and drift, achieving sub-50 nV/°C offset drift and DC-to-1 Hz noise of 0.35 µV_P-P. Its front-end employs large-geometry CMOS transistors to minimize thermal noise while maintaining rail-to-rail input common-mode range down to ground with single 12 V+ supplies.

It features an enhanced output stage delivering ±4.0 V minimum swing into 1 kΩ with ±5 V supplies and full output swing into 10 kΩ loads. The device requires no external nulling components and maintains stability with feedback resistors ≥1.9 kΩ when compensated with CF ≥ 55 pF / A_V, per its 55 pF input-to-V+ parasitic capacitance.

Key Specifications

Pinout & Package

Package: 8-lead plastic SO (S8), narrow body (0.150″), RoHS-compliant, JEDEC MS-012AC compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC1250CS8#PBF, LTC2050CS8#PBF trades noise performance for power efficiency, while LTC2053IMS8#PBF replaces op-amp flexibility with integrated INA functionality - making LTC1250CS8#PBF the optimal choice when lowest 0.1–10 Hz noise and user-defined gain are mandatory.

Availability

LTC1250CS8#PBF is available at Aetrix Electronics and suitable for electronic scales, strain gauge interfaces, thermocouple amplifiers, and high-resolution data acquisition systems requiring stable component supply across extended production lifecycles.

Supply support for LTC1250CS8#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 acquired Linear Technology in 2017 and maintains full technical and manufacturing continuity for the LTC portfolio. Linear pioneered precision analog ICs with emphasis on low-noise, zero-drift, and high-accuracy signal conditioning.

The LTC1250CS8#PBF belongs to Linear's zero-drift op amp family, designed specifically for DC-coupled, high-resolution sensor interfaces where offset drift and low-frequency noise dominate system error budgets.

FAQ

What is the maximum total supply voltage for the LTC1250CS8#PBF?

The LTC1250CS8#PBF has an absolute maximum total supply voltage (V+ to V–) of 18 V. Operation beyond this rating risks permanent damage. For reliable long-term use, keep total supply ≤16 V - especially when ambient temperature exceeds 70°C, as junction temperature rise reduces safe operating margin. The LTC1250CS8#PBF is typically operated at ±5 V (10 V total) or single 5 V with appropriate level shifting.

Does the LTC1250CS8#PBF require external capacitors for stability?

Yes - the LTC1250CS8#PBF exhibits 55 pF input-to-V+ parasitic capacitance that can destabilize high-impedance feedback networks. For closed-loop gains below 50 and RF ≥10 kΩ, add CF ≥ 55 pF / A_V across the feedback resistor. For example, at A_V = 10, use CF ≥ 5.5 pF; typical values range 100–500 pF. Omit CF only when RF < 5 kΩ or A_V > 50. The LTC1250CS8#PBF will oscillate without proper compensation in high-Z configurations.

Can the LTC1250CS8#PBF operate from a single 5 V supply?

Yes - the LTC1250CS8#PBF supports single-supply operation down to 4.5 V. With a 5 V supply and V– tied to ground, it delivers 4.3 V output swing into 1 kΩ and accepts input common-mode voltages within 250 mV of ground. For true ground-referenced inputs, level-shift the signal or use a split-rail charge pump. The LTC1250CS8#PBF's input stage remains functional with V_CM = 0 V, unlike many older op amps requiring V_CM ≥1.5 V.

How does the LTC1250CS8#PBF handle overload recovery?

The LTC1250CS8#PBF recovers from positive saturation in 0.5 ms and from negative saturation in 1.5 ms - asymmetry arises from internal output stage design. This recovery time is measured under RL = 10 kΩ, CL = 50 pF, AV = 1. In fast-cycling bridge applications (e.g., dynamic load cells), ensure settling time budget accounts for worst-case 1.5 ms recovery. The LTC1250CS8#PBF does not latch during overload and resumes linear operation immediately after recovery.

Is the LTC1250CS8#PBF pin-compatible with standard 8-pin op amps?

Yes - the LTC1250CS8#PBF uses the industry-standard single op amp pinout (SO-8 package): Pin 2 = –IN, Pin 3 = +IN, Pin 4 = V–, Pin 6 = V+, Pin 7 = OUT. Pins 1, 5, and 8 are NC and must remain unconnected. This allows direct replacement of legacy DIP-8 or SO-8 op amps like OP-07, LT1013, or AD707 without PCB modification - provided supply rails and noise requirements align with the LTC1250CS8#PBF's specifications.