LM358H
LM358H - Dual Low-Power Operational Amplifier | Texas Instruments
The Texas Instruments LM358H is a dual, general-purpose operational amplifier in an 8-pin TO-99 through-hole package. The device contains two independent amplifier sections and is designed for low-power operation from a single supply, while split-supply operation is also possible. Its primary package option is TO-99-8, and the verified distributor listing identifies it as a standard two-circuit amplifier from National Semiconductor, now part of Texas Instruments. The LM358H belongs to the operational-amplifier hierarchy, where it provides general-purpose signal amplification for industrial control, instrumentation, audio, sensor interfaces, and low-voltage analog systems.
An operational amplifier is an analog integrated circuit that amplifies the difference between its inverting and non-inverting inputs. The LM358H uses two independent sections in one package, allowing one physical component to implement two amplification or buffering functions. This can reduce board area compared with two single-amplifier packages while retaining the simple through-hole construction associated with the TO-99-8 format. Its low-power design is useful where supply consumption must remain modest but general-purpose analog signal conditioning is still required.
The verified data identifies the LM358H as a low-power dual operational amplifier. Its two-circuit configuration supports applications such as sensor signal conditioning, voltage amplification, comparator-style thresholding, audio preamplification, and general feedback-control blocks. The through-hole TO-99-8 package is particularly suitable for prototypes, legacy industrial equipment, educational platforms, and repair applications where a socketed or leaded component is easier to install than a fine-pitch surface-mount package. Detailed electrical limits must be confirmed against the manufacturer datasheet for the specific voltage, temperature, and production source used in the design.
The LM358H family is historically associated with operation from a single power supply over a wide voltage range. Its general-purpose architecture is intended for use in both single-supply and split-supply analog systems. In a single-supply circuit, the signal and reference input levels must remain within the amplifier's common-mode input range; in a dual-supply circuit, the ground reference can be placed near the midpoint between the positive and negative rails. Exact offset, bandwidth, slew-rate, output-swing, and supply-current limits are not present in the supplied source snippets and therefore require confirmation in the manufacturer datasheet.
Typical uses include low-level sensor interfaces, industrial controllers, audio mixer stages, active filters, and general DC signal-conditioning boards. The dual section can amplify one signal while the other provides an active filter, buffer, or comparator function. Because the LM358H is a through-hole device, it is also appropriate for educational and maintenance work where PCB rework is undesirable. Designers should still verify input bias-current behavior, output-current capability, and stability with the external compensation and load conditions used in the target circuit.
The primary design consideration is to verify the exact electrical envelope before replacement. Although LM358-family devices share a common functional concept, orderable variants can differ in manufacturer, temperature grade, package, qualification, and tested parameters. The TO-99-8 package must match the original PCB footprint, and the replacement amplifier's common-mode range and output-swing limits must support the intended signal. Decoupling close to the supply pins and a stable feedback network are essential for reliable operation.
This product record combines the verified LM358H package and device descriptions with a practical drop-in comparison table, sourcing guidance, application examples, and design notes. These resources help engineers identify whether the LM358H matches an existing TO-99-8 design while highlighting which specifications still require direct review of the manufacturer datasheet before procurement or production release.
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