onsemi LF353D

Overview

LF353D from STMicroelectronics is a wide-bandwidth dual JFET-input operational amplifier in SO-8 package, featuring 16 V/µs typical slew rate, ±15 V input voltage range, and 2.5–4 MHz gain-bandwidth product. It delivers low input bias current (20–200 pA), high input impedance (10¹² Ω), and output short-circuit protection for precision analog signal conditioning in industrial instrumentation and audio preamplifier stages.

For engineers reviewing the LF353D datasheet, LF353D pinout, LF353D application, or LF353D equivalent, key selection criteria include common-mode input range up to V_CC±, differential input voltage tolerance of ±30 V, thermal resistance (R_thJA = 125 °C/W), and offset voltage drift of 10 µV/°C - all critical for stable DC-coupled amplification and temperature-sensitive sensor interfaces.

Technical Context

The LF353D integrates matched high-voltage JFET and bipolar transistors on a monolithic die, enabling dual independent amplifiers with internal frequency compensation and latch-up-free operation. Its JFET input stage provides high input impedance and low input bias current, while the bipolar output stage supports rail-to-rail output swing capability under 2 kΩ load.

Designed for single- or dual-supply operation (±6 V to ±18 V), it maintains stable unity-gain performance with 45° phase margin and 0.1 µs rise time. The device operates across 0°C to +70°C ambient temperature and exhibits 120 dB channel separation at Av = 100, minimizing crosstalk in dual-channel signal paths.

Key Specifications

Pinout & Package

LF353D is housed in an 8-pin SO-8 plastic micro package (ECOPACK® compliant), measuring 4.90 mm × 6.00 mm × 1.25 mm (max height), with 1.27 mm lead pitch and gull-wing terminations.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC27L2CD and TL072CD, the LF353D offers superior input bias current spec (20 pA min), guaranteed infinite short-circuit tolerance, and wider common-mode range - making it optimal for precision DC-coupled measurement front-ends where leakage and fault resilience are design-critical.

Availability

LF353D is available at Aetrix Electronics and suitable for industrial instrumentation, audio preamplifier circuits, and active filter designs requiring stable component supply, consistent parametric performance across production batches, and long-term lifecycle availability.

Supply support for LF353D 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, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The LF353D belongs to ST's legacy precision analog amplifier family, engineered specifically for high-fidelity signal conditioning in cost-sensitive industrial and test equipment where JFET input performance and ruggedness outweigh ultra-low-power requirements.

FAQ

What is the maximum recommended supply voltage for LF353D?

The absolute maximum supply voltage is ±18 V, but the device is characterized and specified for reliable operation between ±6 V and ±18 V. Operating at ±18 V requires careful thermal management due to increased power dissipation; derating is advised above ±15 V in enclosed environments.

Does LF353D require external compensation capacitors?

No - the LF353D features internal frequency compensation optimized for unity-gain stability. External compensation is unnecessary for standard inverting, non-inverting, or voltage-follower configurations. Adding external capacitors may degrade phase margin or cause instability.

Can LF353D drive capacitive loads directly?

It can drive up to 100 pF without oscillation under unity-gain conditions, as verified in the datasheet test setup. For loads >100 pF, a series isolation resistor (typically 10–100 Ω) between output and capacitance is required to maintain stability and prevent ringing.

Is there an offset null capability on LF353D?

Yes - Pins 1 and 8 (Offset Null 1 and Offset Null 2) are provided for external trimming. A 10 kΩ potentiometer connected between these pins, with wiper to V_CC–, allows adjustment of input offset voltage to <1 mV in precision applications.