Analog Devices Inc. LT1462ACS8#TRPBF

Overview

LT1462ACS8#TRPBF from Analog Devices (formerly Linear Technology) is a dual micropower JFET-input operational amplifier optimized for ultra-low input bias current (2 pA max), 45 µA per amplifier supply current, and unity-gain stability with up to 10 nF capacitive loads. It features rail-to-rail input common-mode range including the positive supply, ±13.7 V output swing into 10 kΩ at ±15 V supplies, and is specified for operation from –40°C to 85°C in SO-8 package.

For engineers reviewing the LT1462ACS8#TRPBF datasheet, LT1462ACS8#TRPBF pinout, LT1462ACS8#TRPBF application, or LT1462ACS8#TRPBF equivalent, this page delivers verified specifications, validated pin functions, real-world use cases in photodiode amplification and micropower filtering, and two confirmed alternative op amps with documented parameter differences.

Technical Context

The LT1462ACS8#TRPBF employs JFET input stage architecture enabling picoampere-level input bias current and high input impedance (>10¹² Ω). Its internal compensation ensures stable unity-gain operation with capacitive loads up to 10 nF-critical for sensor interfaces and active filters where stray capacitance is unavoidable.

It delivers guaranteed matching specs between amplifiers (e.g., offset voltage match ≤1.3 mV, CMRR match ≥74 dB), operates across ±5 V and ±15 V supplies, and maintains 0.13 V/µs slew rate and 175 kHz gain-bandwidth product at 25°C-enabling precision DC-coupled signal conditioning without power penalty.

Key Specifications

Pinout & Package

LT1462ACS8#TRPBF is housed in an 8-lead plastic SOIC (SO-8) package, 3.9 mm × 4.9 mm body, 1.27 mm lead pitch, with standard dual op amp pinout and RoHS-compliant matte tin lead finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LT1462ACS8#TRPBF, LTC1464CS8#TRPBF trades ultra-low bias current for bandwidth, while OPA2140AIDR offers superior speed and noise performance at higher quiescent current (1.8 mA vs. 45 µA), making it suitable for AC-coupled or higher-frequency applications where micropower is secondary.

Availability

LT1462ACS8#TRPBF is available at Aetrix Electronics and suitable for photodiode amplification, micropower active filtering, and low-droop track-and-hold circuits requiring stable component supply across industrial, medical, and test equipment programs.

Supply support for LT1462ACS8#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 acquired Linear Technology in 2017 and maintains its precision analog portfolio. Linear pioneered high-performance, low-power op amps for demanding instrumentation applications.

The LT1462 series belongs to Linear's micropower precision op amp product line, designed specifically for battery-operated and high-impedance sensor signal chains where input bias current, supply current, and capacitive load drive are critical constraints.

FAQ

What is the maximum capacitive load the LT1462ACS8#TRPBF can drive while remaining unity-gain stable?

The LT1462ACS8#TRPBF is unity-gain stable with capacitive loads up to 10 nF, as confirmed in the datasheet's "Typical Performance Characteristics" and "Applications Information" sections. This capability eliminates the need for external isolation resistors in applications such as driving ADC input capacitors or long PCB traces, and is validated across ±5 V and ±15 V supplies. The LT1462ACS8#TRPBF achieves this via internal compensation optimized for C-load stability without sacrificing DC precision.

Does the LT1462ACS8#TRPBF support operation from a single +5 V supply?

Yes, the LT1462ACS8#TRPBF is fully specified for ±5 V operation, which corresponds to a 10 V total supply span. While not explicitly characterized for true single-supply operation (e.g., V– = 0 V, V+ = 5 V), its input common-mode range includes the positive rail and output swing reaches within 1.5 V of either supply - enabling functional use with V– grounded and V+ = 5 V, provided input signals stay within 0 V to 3.5 V and output loading permits adequate headroom. The LT1462ACS8#TRPBF datasheet confirms performance at ±5 V, and application circuits demonstrate compatibility with 5 V–ground configurations.

What is the guaranteed input bias current specification for LT1462ACS8#TRPBF over temperature?

The LT1462ACS8#TRPBF guarantees input bias current ≤2 pA maximum at 25°C and ≤500 pA maximum over the full –40°C to 85°C operating temperature range, as stated in the "Electrical Characteristics" table under the 'G' (guaranteed) column. This specification applies to the 'A' grade version (denoted by 'A' in LT1462A), and the LT1462ACS8#TRPBF is the SO-8 packaged variant of that grade. The LT1462ACS8#TRPBF maintains ultra-low bias current across temperature better than standard JFET op amps, supporting long-term stability in high-impedance circuits.

How does the LT1462ACS8#TRPBF prevent phase reversal when input common-mode voltage exceeds the negative rail?

The LT1462ACS8#TRPBF incorporates internal phase reversal protection circuitry that prevents output inversion when the input common-mode voltage falls below the negative supply rail - a failure mode common to many JFET-input op amps. As demonstrated in Figure 1 of the datasheet, the LT1462ACS8#TRPBF maintains correct polarity even with ±5.2 V sine wave inputs exceeding the –5 V rail, whereas legacy JFET op amps exhibit destructive phase reversal. This ensures reliable operation in servo loops and sensor interfaces where transient overvoltage is possible. The LT1462ACS8#TRPBF achieves this without degrading input bias current or noise performance.

Is LT1462ACS8#TRPBF pin-compatible with other dual op amps in SO-8 package?

Yes, the LT1462ACS8#TRPBF uses the industry-standard dual op amp pinout for SO-8 packages: Pin 1 = OUT A, Pin 2 = –IN A, Pin 3 = +IN A, Pin 4 = V–, Pin 5 = +IN B, Pin 6 = –IN B, Pin 7 = OUT B, Pin 8 = V+. This matches the pin configuration of LM358, TL072, OP27, and many other dual op amps in SO-8, enabling drop-in replacement in existing layouts where electrical specs align. However, due to its ultra-low bias current and micropower operation, layout practices (guard rings, low-leakage PCB materials) must be reviewed when substituting into legacy designs. The LT1462ACS8#TRPBF maintains full pin compatibility while delivering unique performance advantages.