Texas Instruments LF356H

Overview

LF356H from Texas Instruments is a JFET-input operational amplifier optimized for precision high-speed integrators, fast D/A and A/D converters, and wideband low-noise amplification. It delivers 12 V/µs slew rate, 5 MHz gain bandwidth, 12 nV/√Hz input voltage noise at 1 kHz, 30 pA typical input bias current, and operates from ±15 V supplies with 0°C to +70°C temperature range.

For engineers reviewing the LF356H datasheet, LF356H pinout, LF356H application, or LF356H equivalent, this page provides verified technical context, real-world design values, package-specific thermal data, confirmed alternative options, and supply-chain support details tailored to industrial instrumentation and data acquisition systems.

Technical Context

The LF356H implements BI-FET™ technology-monolithic integration of matched high-voltage JFETs with bipolar transistors-enabling low 1/f noise corner, input bias current independent of supply voltage, and large differential input voltage tolerance (±30 V). Its offset adjust circuitry preserves drift stability and common-mode rejection without degradation.

It features an internal compensation network enabling stable operation with capacitive loads up to 5000 pF, supports rail-to-rail common-mode input voltage (up to +15.1 V and down to −12 V with ±15 V supplies), and maintains >80 dB CMRR and PSRR across its operating temperature range.

Key Specifications

Pinout & Package

LF356H is available in TO-99 metal can package (8-pin, 9.08 mm × 9.08 mm body), designed for hermetic sealing and thermal stability in demanding analog environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL072CP and OPA134UA, the LF356H uniquely combines TO-99 thermal robustness, user-adjustable offset without drift penalty, and proven stability with 5000-pF loads-making it irreplaceable in calibrated test equipment and aerospace-grade analog subsystems where long-term parametric consistency is mandatory.

Availability

LF356H is available at Aetrix Electronics and suitable for precision instrumentation, industrial data acquisition, and aerospace sensor conditioning requiring stable component supply across extended product lifecycles.

Supply support for LF356H 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 leader specializing in analog and embedded processing technologies, with over 50 years of op amp innovation and military-grade reliability validation.

The LF356H belongs to TI's LFx5x JFET-input op amp family, engineered specifically for high-precision, high-speed analog signal conditioning in test & measurement, medical instrumentation, and avionics where low 1/f noise and rugged input handling are non-negotiable.

FAQ

What is the maximum capacitive load the LF356H can drive without instability?

The LF356H is internally compensated to drive up to 5000 pF capacitive loads without external compensation or isolation resistors. This capability is validated in TI's SNOSBH0D datasheet Figure 46 and enables direct interfacing with sample-and-hold capacitors and long PCB traces in data acquisition systems. The LF356H maintains ≥45° phase margin under these conditions, unlike many general-purpose op amps requiring series-R or lead-compensation networks.

Does offset adjustment on the LF356H affect its temperature drift or common-mode rejection?

No-offset adjustment on the LF356H does not degrade temperature drift or common-mode rejection ratio (CMRR). As confirmed in the "Features" section of SNOSBH0D, the BALANCE pins (Pins 1 and 5) connect to a dedicated trimming network that adjusts input stage mismatch without disturbing the bias current sources or differential pair symmetry. Measured ΔVOS/ΔT remains ≤5 µV/°C and CMRR stays ≥80 dB after adjustment.

Can the LF356H operate with input voltages exceeding the positive supply rail?

Yes-the LF356H supports common-mode input voltages up to +15.1 V when powered from ±15 V supplies, exceeding V+ by ~100 mV. This is explicitly documented in Section 6.7 of SNOSBH0D and enables high-side current sensing where the input is referenced to the positive rail. However, neither input may fall below the negative supply rail, as that causes destructive current flow.

What is the typical input bias current of the LF356H at 25°C and how does it change with temperature?

The LF356H exhibits 30 pA typical input bias current at 25°C, with a worst-case limit of 200 pA over 0°C to +70°C. Per Section 6.7 footnote (3), IB approximately doubles per 10°C junction temperature rise. At TA = 70°C and moderate power dissipation, TJ may reach ~90°C, resulting in IB ≈ 120 pA-still well within precision design margins for most high-Z sensor interfaces.

Is the LF356H pin-compatible with other devices in the LFx5x family such as LF355 or LF357?

Yes-the LF356H shares identical pinout and footprint with LF355H and LF357H in the TO-99 package, including BALANCE (Pins 1/5), +INPUT (Pin 3), –INPUT (Pin 2), OUTPUT (Pin 6), V+ (Pin 7), V– (Pin 4), and NC (Pin 8). This allows drop-in replacement for bandwidth/speed trade-offs: LF355H (2.5 MHz/5 V/µs), LF356H (5 MHz/12 V/µs), LF357H (20 MHz/50 V/µs), all using the same layout and offset trim network.