Analog Devices Inc. LT1465CS#PBF

Overview

LT1465CS#PBF from Analog Devices (formerly Linear Technology) is a quad micropower JFET-input operational amplifier optimized for ultra-low input bias current (20 pA max), 1 MHz gain bandwidth, and unity-gain stability with capacitive loads up to 10 nF. It operates from ±5 V or ±15 V supplies, delivers ±13.7 V output swing into 10 kΩ, and targets precision photocurrent amplification, low-frequency active filters, and battery-powered instrumentation.

For engineers reviewing the LT1465CS#PBF datasheet, LT1465CS#PBF pinout, LT1465CS#PBF application, or LT1465CS#PBF equivalent, key selection criteria include guaranteed picoampere-level input bias current over temperature, C-load stability without external compensation, rail-to-rail input common-mode range (including positive rail), matching specifications between channels, and SO-14 package compatibility with space-constrained analog signal chains.

Technical Context

The LT1465CS#PBF employs JFET input stages with guarded inputs and laser-trimmed resistor networks to achieve 20 pA maximum input bias current and 0.8 mV maximum input offset voltage at ±15 V. Its internal compensation ensures stable operation with 10 nF capacitive loads in unity-gain configurations-critical for track-and-hold and peak detector circuits where droop must be minimized.

It features fully tested slew rate (0.5 V/µs min) and gain bandwidth product (650 kHz min), along with guaranteed matching specs (e.g., ≤3.3 mV offset match, ≤30 pA noninverting bias current match) across all four amplifiers. Input common-mode range extends to the positive supply rail, enabling direct sensing of high-impedance sources referenced to V+.

Key Specifications

Pinout & Package

LT1465CS#PBF is housed in a 14-lead plastic SO (SO-14) surface-mount package with standard quad op amp pinout and 1.27 mm lead pitch. The package meets JEDEC MS-012AC and is RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad JFET-input op amp applications.

Compared with LT1465CN#PBF, LT1465CS#PBF offers superior thermal performance and RoHS-compliant SMT assembly readiness; versus OPA4141AIDR, it trades bandwidth for guaranteed 10 nF drive capability - making it uniquely suited for precision, low-power, high-impedance sampling circuits.

Availability

LT1465CS#PBF is available at Aetrix Electronics and suitable for battery-powered instrumentation, precision photocurrent amplification, and low-frequency active filters requiring stable component supply and long-term parametric consistency.

Supply support for LT1465CS#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 legacy Linear op amps. Linear pioneered high-precision, low-power analog ICs for demanding industrial and instrumentation markets.

The LT1465CS#PBF belongs to Linear's C-Load™ family of micropower JFET op amps, designed specifically for applications where ultra-low input bias current, rail-inclusive input range, and uncompensated capacitive load drive are simultaneously required - such as electrochemical sensors and portable medical devices.

FAQ

What is the maximum capacitive load the LT1465CS#PBF can drive without instability?

The LT1465CS#PBF is unity-gain stable with capacitive loads up to 10 nF, as verified in the datasheet's Phase Margin vs CLOAD plot (TPC13). This eliminates the need for series isolation resistors when driving ADC input capacitors, sample-hold networks, or long cables - a key differentiator versus most micropower op amps that require compensation beyond 100 pF.

Does the LT1465CS#PBF support operation from ±5V supplies?

Yes, the LT1465CS#PBF is fully specified and guaranteed for operation from ±5V supplies, including input offset voltage (0.6 mV max), supply current (200 µA max per amplifier), and output swing (±3.7 V into 2 kΩ). Its design emphasizes performance parity across ±5V and ±15V rails - critical for modern low-voltage portable systems.

How does the LT1465CS#PBF prevent phase reversal at the input?

The LT1465CS#PBF uses protected JFET input circuitry that avoids phase reversal even when the input common-mode voltage exceeds the negative rail or approaches the positive rail. Unlike standard JFET op amps, it maintains correct polarity output response across the full supply range - preventing lock-up in servo loops and ensuring reliable behavior in overvoltage transients.

Are matching specifications guaranteed between all four amplifiers in the LT1465CS#PBF?

Yes, matching parameters - including offset voltage match (≤3.3 mV max), noninverting bias current match (≤30 pA max), and CMRR/PSRR match - are guaranteed between amplifier pairs A/D and B/C per datasheet Note 7. These specs are tested and assured across temperature, enabling high-accuracy differential and instrumentation amplifier implementations.

What is the typical input bias current of the LT1465CS#PBF at 85°C?

At –40°C to 85°C, the LT1465CS#PBF guarantees input bias current ≤2500 pA (2.5 nA) - derived from the datasheet's IB specification table (row "IB", column "LT1464C/LT1465C", row "–40°C ≤ TA ≤ 85°C"). Typical performance remains well below this limit, with TPC01 showing <500 pA at 85°C for the LT1464 variant.