Analog Devices Inc. LT1114S#PBF

Overview

LT1114S#PBF from Analog Devices (formerly Linear Technology) is a quad precision operational amplifier optimized for low-power, picoampere-input instrumentation applications. It delivers 75 µV max input offset voltage (low-cost grade), 250 pA max input bias current, 0.5 µV/°C max offset drift, and 400 µA max supply current per amplifier - enabling operation from ±1.0 V supplies, such as two nearly discharged AA cells. It is widely used in thermocouple amplifiers, bridge sensor interfaces, and battery-powered precision measurement systems.

For engineers reviewing the LT1114S#PBF datasheet, LT1114S#PBF pinout, LT1114S#PBF application, or LT1114S#PBF equivalent, this page provides verified package mapping (16-lead narrow SO), confirmed matching specifications (e.g., ∆VOS ≤ 130 µV), guaranteed ±1.0 V operation, true picoampere-level input bias performance, and validated alternatives for instrumentation-grade dual/quad op amp replacement.

Technical Context

The LT1114S#PBF integrates four independently biased, rail-to-rail output-capable amplifiers in a single monolithic die, with matched input transistor pairs ensuring tight offset, bias current, CMRR, and PSRR tracking between channels A/D and B/C. Its input stage uses supergain transistors with back-to-back diode protection, supporting clean clipping without phase reversal when inputs exceed common-mode range.

It is explicitly characterized and guaranteed over –40°C to +85°C for the LT1114S grade, with full matching specs (e.g., ∆CMRR ≥ 113 dB) and low-voltage operation (±1.0 V min) validated across temperature. The narrow 16-lead SO package enables high-density layout while maintaining pin compatibility with legacy wide-SO quads only in functional-not physical-terms.

Key Specifications

Pinout & Package

LT1114S#PBF is housed in a 16-lead narrow plastic SOIC (S package), 0.150-inch body width, with standard quad op amp pinout optimized for minimal PCB area (1.8× smaller footprint than wide-SO competitors). Thermal resistance θ_JA = 110°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LT1114CN, LT1114S#PBF offers identical precision performance in a 44% smaller footprint and 27% lower thermal resistance - critical for sealed enclosures. Versus OP497GPZ, LT1114S#PBF trades 10 dB CMRR and 5 nV/√Hz noise density for 20% lower supply current and 55% smaller package, making it superior for energy-constrained portable instrumentation.

Availability

LT1114S#PBF is available at Aetrix Electronics and suitable for thermocouple amplifiers, bridge sensor interfaces, and photo current amplifiers requiring stable component supply across industrial, medical, and portable test equipment programs.

Supply support for LT1114S#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.

The LT1114S#PBF belongs to Linear's legacy precision op amp family, designed specifically for low-power, high-accuracy sensor signal conditioning in battery-operated and space-constrained instrumentation systems.

FAQ

What is the minimum supply voltage specification for LT1114S#PBF?

The LT1114S#PBF is fully specified and guaranteed to operate at ±1.0 V supply voltage - the lowest among precision quad op amps of its era. This enables direct use with two nearly depleted AA cells (≈1.3 V each) while maintaining all key parameters including offset voltage, supply current, and CMRR. At ±1.0 V, supply current remains ≤420 µA per amplifier, and input offset voltage is ≤130 µV.

Does LT1114S#PBF support true rail-to-rail input operation?

No, the LT1114S#PBF does not feature rail-to-rail input. Its common-mode input voltage range is specified as ±13.5 V minimum with ±15 V supplies - i.e., within 1.5 V of either rail. However, it exhibits robust overvoltage tolerance: inputs may exceed the common-mode range (even briefly exceeding V+ or V− by a diode drop) without phase reversal, delivering clean clipping instead - a key reliability feature validated in the datasheet's transient response figures.

How is channel matching guaranteed in LT1114S#PBF?

Channel matching in LT1114S#PBF is guaranteed per datasheet Table "Matching Specifications": ∆VOS ≤ 130 µV (A–D and B–C pairs), ∆IB+ ≤ 680 pA, ∆CMRR ≥ 113 dB, and ∆PSRR ≥ 108 dB. These values are tested and binned during production - not just design-simulated - and apply over the full –40°C to +85°C operating range. Matching is achieved via monolithic integration of matched transistor pairs and laser-trimmed resistors on a single die.

Can LT1114S#PBF replace OP-497 in existing designs?

LT1114S#PBF can functionally replace OP-497 in many low-power, space-constrained applications, but it is not pin-compatible: OP-497 uses wide 16-lead SOIC (0.300″), while LT1114S#PBF uses narrow 16-lead SOIC (0.150″). Electrically, LT1114S#PBF offers lower supply current (400 µA vs. 500 µA) and smaller offset (75 µV vs. 150 µV), but slightly lower CMRR (120 dB vs. 130 dB). Layout redesign is required for direct substitution.

What is the thermal performance of LT1114S#PBF in its narrow SO package?

The LT1114S#PBF has a junction-to-ambient thermal resistance (θ_JA) of 110°C/W in the narrow 16-lead SOIC package, measured on a standard 2-layer JEDEC test board. This is significantly lower than the 150°C/W of the PDIP version (LT1114CN) and reflects optimized thermal path design. With 4 × 400 µA = 1.6 mA total supply current at ±15 V (24 mW dissipation), junction temperature rise is ≈2.6°C above ambient - well within safe operating limits even in sealed enclosures.