LM2904MX
LM2904MX - Dual 26V 700kHz Operational Amplifier | TI
Texas Instruments LM2904MX is a dual, general-purpose operational amplifier designed for operation from a single supply across a wide voltage range. The device contains two independent, internally frequency-compensated amplifiers in an 8-pin SOIC package. According to the manufacturer product page, the LM2904 family supports supply voltages up to 26 V and offers a gain-bandwidth product of 700 kHz. Its internally compensated architecture simplifies stable operation as a unity-gain buffer, while its high open-loop voltage gain and low-power design make it suitable for general signal-conditioning tasks.
An operational amplifier is a high-gain analog building block used to amplify voltage differences, buffer inputs, perform comparisons, drive external loads, and implement active filters. Within the broader semiconductor hierarchy, the LM2904MX belongs to the operational-amplifier family, which falls under analog ICs and signal-conditioning semiconductors. Unlike precision or rail-to-rail amplifiers, the LM2904 is intended primarily for conventional supply-based operation and general-purpose applications.
The principal features of the LM2904MX include two amplifier channels, an 8-SOIC package, a 700 kHz gain-bandwidth product, and operation from a single supply as high as 26 V. The device is internally frequency compensated, which allows operation at unity gain without an external compensation network. A typical slew rate is 0.3 V/us, making the amplifier appropriate for low-frequency analog processing rather than high-speed signal conditioning. The dual configuration also provides cost and board-area efficiency when a design needs two independent amplifier functions.
Each channel can support feedback-based amplifier configurations such as non-inverting amplifiers, inverting amplifiers, voltage followers, summing circuits, and active filters. The LM2904MX is useful when signals must be conditioned with external resistors or capacitors and the application does not require the very low offset, low noise, high speed, or rail-to-rail input and output behavior associated with more specialized amplifier families. Its wide supply-voltage capability also permits operation from industrial-style elevated rails, subject to the device ratings.
Typical applications include industrial control and instrumentation, sensor signal conditioning, power-supply feedback monitoring, audio and communications interface circuits, active filtering, and general-purpose analog buffers. In a 24 V industrial system, the 26 V maximum supply rating leaves little margin for transient overshoot, so input protection and rail clamping should be considered. The dual channels can serve separate signal paths, but designers should not assume that the two amplifiers share an output or that short-circuit protection makes unlimited current available.
Design attention should focus on the input common-mode range, output swing, output-current capability, stability with the intended load, and the power dissipation created by the supply-to-output voltage difference. Place the device close to feedback and bypass components, use a local supply bypass capacitor, and route high-impedance input nodes with minimal parasitic capacitance. Verify operation across supply voltage, temperature, output load, and source resistance because these conditions affect common-mode range, output swing, and amplifier stability.
This page combines manufacturer specifications, package details, drop-in alternatives, application guidance, and design checks to support component selection and PCB implementation. It also highlights the distinctions between the LM2904MX and commonly encountered LM2904 order codes so engineers can confirm electrical behavior, package compatibility, and assembly requirements before approving a replacement.
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