STMicroelectronics LF253D

Overview

LF253D from STMicroelectronics is a wide-bandwidth dual JFET-input operational amplifier in SO-8 package, rated for -40°C to +105°C operation. It delivers 16 V/µs typical slew rate, ±11 V common-mode input range (up to V_CC+), and 2.5–4 MHz gain-bandwidth product. Used in precision instrumentation front-ends requiring low input bias current (20–200 pA) and high input impedance (10¹² Ω).

For engineers reviewing the LF253D datasheet, LF253D pinout, LF253D application, or LF253D equivalent, key selection criteria include input offset voltage drift (10 µV/°C), output short-circuit protection, latch-up immunity, thermal resistance (125 °C/W junction-to-ambient), and SO-8 footprint compatibility with space-constrained analog signal chains.

Technical Context

The LF253D integrates matched high-voltage JFET and bipolar transistors on a monolithic die to achieve high slew rate and low input currents simultaneously. Its internal frequency compensation ensures unity-gain stability without external components, while the JFET input stage enables rail-to-rail common-mode operation up to V_CC+ and maintains <100 pA input bias current across temperature.

Designed for dual-amplifier topologies, it supports independent offset nulling per channel via dedicated pins (1 & 8). The device operates from ±6 V to ±18 V supplies, delivering ±12 V output swing into 10 kΩ load at ±15 V supply, with 120 dB channel separation at Av = 100 - critical for multi-channel sensor conditioning and active filtering.

Key Specifications

Pinout & Package

LF253D uses an SO-8 plastic micro package (ECOPACK® compliant), 4.8–5.0 mm × 5.8–6.2 mm body, 1.27 mm lead pitch, with 1.75 mm max height. Thermal resistance is 125 °C/W (junction-to-ambient) and 40 °C/W (junction-to-case).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL072CDR and LF353DR, the LF253D uniquely combines extended temperature rating (−40°C to +105°C), 16 V/µs slew rate, and guaranteed 20 pA input bias current - making it the only option among the three qualified for harsh-environment sensor front-ends with dynamic signal fidelity requirements.

Availability

LF253D is available at Aetrix Electronics and suitable for precision instrumentation, industrial sensor interfaces, and automotive cabin control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LF253D 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, designing and manufacturing analog, MCU, power, and MEMS products for industrial, automotive, and consumer markets.

The LF253D belongs to ST's legacy precision analog portfolio, engineered specifically for high-fidelity, low-drift dual-amplifier applications in demanding environments where JFET input performance and extended temperature reliability are mandatory.

FAQ

What is the maximum safe continuous output short-circuit duration for LF253D?

The LF253D features infinite-duration output short-circuit protection per datasheet Table 1. It may be shorted continuously to either supply rail or ground, provided ambient temperature and supply voltage remain within operating limits to avoid exceeding the 600 mW total power dissipation limit. No external current limiting is required under this condition.

Can LF253D drive a 600 Ω load at ±10 V output swing?

No - the LF253D specifies ±12 V output swing into 10 kΩ and ±10 V into 2 kΩ at ±15 V supply (Table 3). Driving 600 Ω would exceed its 60 mA short-circuit current limit and cause clipping or thermal shutdown. For 600 Ω loads, use a buffer stage or select a higher-output-current op-amp like TSH82.

Is the LF253D RoHS-compliant and halogen-free?

Yes - the LF253D is manufactured in ST's ECOPACK®-compliant SO-8 package, meeting RoHS Directive 2011/65/EU and halogen-free requirements per IEC 61249-2-21. Full compliance documentation, including material declarations and test reports, is available via ST's quality portal using order code LF253D.

Does LF253D require external compensation for unity-gain stability?

No - the LF253D is internally frequency-compensated for unity-gain stability, as confirmed in the "Features" section and Figure 10 (phase margin ≥45° at unity gain). External compensation capacitors are unnecessary and would degrade bandwidth and slew rate performance.