Texas Instruments LF353M

Overview

LF353M from Texas Instruments is a dual JFET-input operational amplifier optimized for high-speed, low-noise analog signal conditioning in industrial and instrumentation systems. It delivers 4 MHz gain bandwidth, 13 V/μs slew rate, 10 mV max input offset voltage, 50 pA typical input bias current, and operates from ±6 V to ±18 V supplies - enabling use in precision integrators, active filters, and D/A output buffers.

For engineers reviewing the LF353M datasheet, LF353M pinout, LF353M application, or LF353M equivalent, key selection criteria include JFET-input impedance (10¹² Ω), low 1/f noise corner (50 Hz), fast 0.01% settling time (2 μs), and SOIC-8 packaging compatible with legacy LM1558 layouts.

Technical Context

The LF353M implements a BI-FET II process with individually zener-biased JFET input stages per channel, enabling stable operation down to ±6 V supplies while maintaining high input impedance and low input bias current. Its internal trimming ensures 10 mV max V_OS at 25°C and 13 mV over 0°C–70°C.

AC performance is defined by a dominant-pole compensated architecture delivering 4 MHz GBW and 13 V/μs slew rate under ±15 V conditions. Input-referred noise is specified as 25 nV/√Hz (typ) and 0.01 pA/√Hz (typ), with THD ≤0.02% at 20 V_p-p, 20 Hz–20 kHz.

Key Specifications

Pinout & Package

LF353M is housed in an 8-pin SOIC (D package) with standard dual op-amp pinout per JEDEC MS-012. Thermal resistance θ_JA is 160°C/W (typ), supporting continuous operation at ambient temperatures up to +70°C with no heatsink required at ≤100 mW dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC27L2CD and TL072CP, the LF353M provides superior combination of speed (4 MHz), precision (10 mV V_OS), and low-noise JFET input (25 nV/√Hz), making it optimal for high-fidelity signal chains where both AC fidelity and DC accuracy are simultaneously required.

Availability

LF353M is available at Aetrix Electronics and suitable for industrial sensor interfaces, audio signal processing, active filter design, and precision instrumentation requiring stable component supply across extended product lifecycles.

Supply support for LF353M 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

Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, specializing in analog, embedded processing, and digital signal solutions for industrial, automotive, and communications markets.

The LF353M belongs to TI's legacy BI-FET II op-amp family, engineered for high-speed, low-input-current analog signal conditioning in cost-sensitive industrial instrumentation and audio systems.

FAQ

What is the operating temperature range for the LF353M?

The LF353M is rated for operation from 0°C to +70°C ambient temperature. This commercial-grade specification aligns with its SOIC-8 packaging and internal thermal design, supporting reliable performance in enclosed industrial enclosures and consumer electronics without forced cooling. The LF353M datasheet confirms this range applies to all electrical characteristics unless otherwise noted.

Does the LF353M support single-supply operation?

Yes, the LF353M can operate from a single supply, provided the input common-mode voltage remains within its specified range (e.g., ≥2 V above V− and ≤3 V below V+). With V− grounded and V+ = +15 V, the usable input range is 0 V to +12 V. Output swing is asymmetric but functional - e.g., +13.5 V and 0 V - making the LF353M suitable for rail-to-rail input (not output) single-supply applications such as sensor front-ends.

Is the LF353M pin-compatible with the LM358?

No, the LF353M is not pin-compatible with the LM358. While both are dual op-amps in 8-pin packages, the LF353M follows the standard dual op-amp pinout (outputs on Pins 1 and 7), whereas the LM358 uses a different pin assignment (outputs on Pins 1 and 7 but with inverted input pin mapping). The LF353M is explicitly pin-compatible with the LM1558, not the LM358. Substituting LF353M for LM358 requires PCB redesign or adapter routing.

What is the maximum differential input voltage the LF353M can withstand?

The LF353M supports a maximum differential input voltage of ±30 V, independent of supply voltage. This rating stems from the high-voltage JFET input structure in TI's BI-FET II process, which eliminates the need for external clamping diodes. However, neither input voltage should exceed the negative supply rail, as doing so risks destructive current flow. This robustness makes the LF353M suitable for interfacing with unconditioned transducer outputs or multiplexed sensor arrays.

How does the LF353M's noise performance compare to bipolar-input op-amps?

The LF353M exhibits significantly lower 1/f noise corner (50 Hz) and input voltage noise (25 nV/√Hz) than comparable bipolar-input op-amps like the LM358 (100 Hz corner, ~40 nV/√Hz), due to its JFET input architecture. Its input current noise (0.01 pA/√Hz) is also orders of magnitude lower than bipolar devices, making the LF353M preferable for high-source-impedance applications - such as photodiode transimpedance amplifiers - where current noise dominates total noise.