STMicroelectronics LF253DT

Overview

LF253DT 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 input common-mode range (up to V_CC+), 10¹² Ω input resistance, and 2.5–4 MHz gain-bandwidth product-enabling precision signal conditioning in industrial sensor interfaces and high-fidelity audio preamplifiers.

For engineers reviewing the LF253DT datasheet, LF253DT pinout, LF253DT application, or LF253DT equivalent, key selection considerations include its JFET-input low bias current (20–200 pA), output short-circuit protection, internal frequency compensation, and compatibility with ±5 V to ±18 V dual supplies across extended temperature.

Technical Context

The LF253DT integrates matched high-voltage JFET and bipolar transistors on a monolithic die, enabling high slew rate (12–16 V/µs) and low input offset voltage drift (10 µV/°C). Its JFET input stage provides ultra-high input impedance and low input bias current that doubles every 10°C rise in junction temperature.

It features internal frequency compensation for unity-gain stability, latch-up free operation, and rail-to-rail input common-mode range extending beyond supply rails (±11 V at ±15 V supply). Output short-circuit protection allows indefinite grounding without damage under thermal limits.

Key Specifications

Pinout & Package

LF253DT 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 gull-wing leads and 1.75 mm max height.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL072CDR and LF353DT, LF253DT uniquely combines industrial temperature range (-40°C to +105°C), lowest input bias current among peers, and guaranteed output short-circuit immunity-making it optimal for ruggedized embedded control and harsh-environment sensing.

Availability

LF253DT is available at Aetrix Electronics and suitable for industrial sensor interfaces, audio preamplifiers, active filter designs, and DC motor current sensing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LF253DT 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 sensor solutions for industrial, automotive, and consumer markets.

The LF253DT belongs to ST's legacy JFET-input op-amp product line, engineered for high-precision, low-power analog signal processing in extended-temperature industrial environments where input bias current and common-mode range are critical.

FAQ

Is LF253DT pin-compatible with LF353DT?

Yes-LF253DT and LF353DT share identical SO-8 pinout, electrical characteristics, and functional behavior. The sole difference is operating temperature range: LF253DT is rated for -40°C to +105°C, while LF353DT is limited to 0°C to +70°C. No PCB or schematic changes are needed for substitution where temperature requirements allow.

Does LF253DT require external offset nulling?

Yes-LF253DT has no internal offset trim. Pins 1 and 8 (Offset Null 1 and 2) are provided for external 10 kΩ potentiometer connection between them, with wiper grounded, to adjust input offset voltage to ≤1 mV. This is essential for DC-coupled precision applications like weigh scales or medical instrumentation.

Can LF253DT operate on single-supply rails?

No-it is designed exclusively for dual-supply operation (±5 V to ±18 V). Its input common-mode range extends to V_CC+, but does not support rail-to-rail input or output on single-ended supplies. For single-supply use, consider ST's TS912 or TSV912, which offer similar JFET-like performance with true single-supply capability.

What is the thermal resistance of LF253DT in SO-8 package?

The SO-8 package has R_thJA = 125 °C/W (junction-to-ambient, still air) and R_thJC = 40 °C/W (junction-to-case). At maximum 3.2 mA supply current per amplifier and ±15 V supply, total power dissipation is ~96 mW; junction temperature rise above ambient is ~12°C under natural convection-well within safe operating limits at +105°C ambient.