Analog Devices Inc. LT1464ACS8#PBF

Overview

LT1464ACS8#PBF from Analog Devices (acquired Linear Technology) is a dual micropower JFET-input operational amplifier optimized for ultra-low input bias current (0.5 pA typ), 1 MHz gain bandwidth, and unity-gain stability with up to 10 nF capacitive loads - enabling precision photocurrent amplification and low-droop track-and-hold in battery-powered instrumentation.

For engineers reviewing the LT1464ACS8#PBF datasheet, LT1464ACS8#PBF pinout, LT1464ACS8#PBF application, or LT1464ACS8#PBF equivalent, key selection criteria include guaranteed picoampere bias current over temperature, ±5V/±15V supply compatibility, SO-8 package footprint, and C-load stability without external compensation.

Technical Context

The LT1464ACS8#PBF employs JFET input stage architecture with matched P-channel devices to achieve sub-picoampere input bias current and high input impedance (>10¹² Ω). Its internal compensation ensures stable operation with capacitive loads up to 10 nF at unity gain - eliminating need for external isolation resistors in sensor interface and sample-hold circuits.

It features rail-to-rail input common-mode range including the positive supply rail, output swing within 1.5 V of both rails into 10 kΩ, and full matching specifications (offset voltage match ≤1.3 mV, bias current match ≤3 pA) between its two amplifiers - critical for differential signal conditioning and precision active filtering.

Key Specifications

Pinout & Package

LT1464ACS8#PBF is housed in an 8-lead plastic SOIC (SO-8, narrow 0.150") package with standard dual op amp pinout and JEDEC MS-012AC compliant dimensions (5.0 mm × 4.0 mm × 1.5 mm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LT1462ACS8#PBF and OPA2140AIDR, the LT1464ACS8#PBF uniquely balances picoampere bias current, 1 MHz bandwidth, and guaranteed 10 nF C-load stability - making it optimal for precision, moderate-speed, high-impedance analog front-ends where all three attributes are simultaneously required.

Availability

LT1464ACS8#PBF is available at Aetrix Electronics and suitable for battery-powered instrumentation, photocurrent amplification, and low-droop track-and-hold circuits requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for LT1464ACS8#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through acquisition of Linear Technology in 2017.

The LT1464ACS8#PBF belongs to Linear Technology's legacy "C-Load" precision op amp family, designed specifically for sensor signal chains demanding ultra-low input current, wide supply range, and robust capacitive load drive without external compensation.

FAQ

What is the maximum capacitive load the LT1464ACS8#PBF can drive stably at unity gain?

The LT1464ACS8#PBF is specified and tested for unity-gain stability with up to 10 nF capacitive load, per Linear Technology's C-Load™ architecture. This eliminates the need for series isolation resistors in ADC driver, peak detector, or sample-hold output stages - a key differentiator versus conventional JFET op amps limited to ~100 pF without compensation. Stability is verified across ±5 V and ±15 V supplies and –40°C to +85°C.

Does the LT1464ACS8#PBF support single-supply operation?

Yes, the LT1464ACS8#PBF supports single-supply operation with input common-mode range extending to the positive rail (V+), allowing direct interfacing with sensors referenced to V+. However, its output swing is limited to within 1.5 V of each rail - so for true rail-to-rail output, a different amplifier is required. Single-supply use is validated at VS = +10 V (±5 V equivalent) and +30 V (±15 V equivalent), with full specs guaranteed.

How does the input bias current of LT1464ACS8#PBF vary with temperature?

The LT1464ACS8#PBF exhibits input bias current of ≤500 pA at –40°C, ≤2 pA at +25°C, and ≤500 pA at +85°C (typical curve shows minimum near room temperature). This non-monotonic behavior results from JFET gate leakage physics and is documented in TPC01. For worst-case design, use 2 pA at 25°C and 500 pA at extremes - critical for 10¹² Ω transimpedance gains where 1 pA error equals 1 mV output offset.

Is LT1464ACS8#PBF pin-compatible with other SO-8 dual op amps like OP27 or TL072?

No, the LT1464ACS8#PBF uses standard dual op amp pinout (SO-8: pins 1/2/3 = Amp B, 4 = V–, 5 = V+, 6/7/8 = Amp A), which matches TL072 and many industry-standard dual op amps. However, functional substitution requires verification of bias current, supply current, and C-load capability - OP27 (nA-level IB) and TL072 (100 pA IB) cannot replace LT1464ACS8#PBF in picoampere-critical applications without significant performance loss.

What is the guaranteed input offset voltage match between the two amplifiers in LT1464ACS8#PBF?

The LT1464ACS8#PBF guarantees offset voltage match (ΔVOS) of ≤1.3 mV at ±5 V supplies and ≤3.3 mV at ±15 V supplies, over 0°C to 70°C. This matching is measured between the two amplifiers on the die and is critical for instrumentation amplifier front-ends, differential receivers, and auto-zero architectures. The spec is 100% tested and appears in the "Matching Specifications" section of the datasheet.