STMicroelectronics LF353DT

Overview

LF353DT from STMicroelectronics is a wide-bandwidth dual JFET-input operational amplifier designed for precision analog signal conditioning in industrial and test equipment. It delivers 16 V/µs typical slew rate, ±15 V input common-mode range (up to V_CC), 2.5–4 MHz gain-bandwidth product, and 10¹² Ω input resistance-enabling high-impedance sensor interfacing and low-distortion AC amplification in dual-channel configurations.

For engineers reviewing the LF353DT datasheet, LF353DT pinout, LF353DT application, or LF353DT equivalent, key selection considerations include its JFET-input low bias current (20–200 pA), output short-circuit protection, internal frequency compensation, and SO-8 package compatibility with space-constrained PCB layouts requiring dual op-amp functionality.

Technical Context

The LF353DT integrates two matched high-voltage JFET-input stages with bipolar output transistors on a single monolithic die, enabling rail-to-rail input voltage swing up to ±15 V and differential input tolerance of ±30 V. Its internal frequency compensation ensures unity-gain stability without external components.

Designed for operation from ±6 V to ±18 V supplies, it maintains 70–86 dB CMRR and 80–86 dB SVR across –40°C to +70°C ambient, with 10 µV/°C offset drift and 0.01% THD at 1 kHz-supporting DC-coupled instrumentation and audio preamplifier topologies where input leakage and thermal drift must be minimized.

Key Specifications

Pinout & Package

LF353DT is housed in an SO-8 plastic micro package (ECOPACK® compliant), measuring 4.90 mm × 6.00 mm × 1.75 mm (max height), with gull-wing leads and 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC27L2CDR and TL072CP, LF353DT offers superior input impedance (10¹² Ω) and wider common-mode range (up to V_CC+), making it uniquely suited for high-Z sensor front-ends and ±15 V legacy industrial systems where leakage-induced offset and rail-headroom constraints dominate.

Availability

LF353DT is available at Aetrix Electronics and suitable for industrial instrumentation, automated test equipment, and analog signal processing modules requiring stable component supply across extended production lifecycles.

Supply support for LF353DT 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power discrete solutions with vertical manufacturing capabilities.

The LF353 forms part of ST's legacy precision analog portfolio, developed specifically for high-fidelity, low-drift dual op-amp applications in industrial control, test & measurement, and audio signal chains operating from ±15 V supplies.

FAQ

What is the maximum supply voltage for LF353DT?

The absolute maximum supply voltage is ±18 V, but recommended operating range is ±6 V to ±18 V. At ±18 V, thermal dissipation must be managed per R_thJA = 125 °C/W (SO-8); continuous operation above ±15 V requires PCB copper area or airflow to maintain junction temperature below 150°C.

Does LF353DT require external compensation capacitors?

No-LF353DT features internal frequency compensation optimized for unity-gain stability. Adding external capacitors may degrade phase margin or cause oscillation; stability is guaranteed across all gains ≥1 with standard resistive feedback networks and ≤100 pF capacitive loads.

Can LF353DT drive capacitive loads directly?

It can safely drive up to 100 pF without instability, as verified in the datasheet test conditions (SR, tr, overshoot). For >100 pF loads, a series isolation resistor (≥100 Ω) between output and capacitance is required to maintain ≥45° phase margin and prevent ringing.

Is LF353DT pin-compatible with other dual JFET op-amps in SO-8?

Yes-LF353DT shares identical SO-8 pinout with TL072, TL082, and CA3240E. However, input bias current (20–200 pA), slew rate (16 V/µs), and common-mode range differ; verify layout compatibility for offset nulling pins (not present on LF353DT) and decoupling requirements before substitution.