Texas Instruments LM2902N

Overview

LM2902N from STMicroelectronics is a low-power quad operational amplifier designed for single-supply operation in automotive and industrial control systems. It features 1.3 MHz gain bandwidth, 100 dB large-signal voltage gain, ±1.5 V to ±15 V dual or 3 V to 30 V single supply range, input common-mode range extending to the negative rail, and 375 µA per amplifier supply current.

For engineers reviewing the LM2902N datasheet, LM2902N pinout, LM2902N application, or LM2902N equivalent, key selection criteria include rail-to-rail input capability at negative rail, low quiescent current across wide supply voltages, guaranteed operation from –40 °C to +125 °C, and compatibility with SO14, TSSOP14, and QFN16 3×3 wettable flank packages.

Technical Context

The LM2902N integrates four independent internally compensated op amps using PNP input stage architecture, enabling input common-mode voltage down to the negative supply rail. Its frequency compensation ensures unity-gain stability without external components.

It supports true single-supply operation with output swing within 20 mV of ground (VOL = 20 mV @ RL = 10 kΩ) and up to 27 V (VOH = 27 V @ VCC+ = 30 V, RL = 2 kΩ), making it suitable for sensor signal conditioning and active filtering where ground-referenced inputs and outputs are required.

Key Specifications

Pinout & Package

LM2902N is available in SO14, TSSOP14, and QFN16 3×3 wettable flank packages. Pin functions are identical across all variants; the exposed pad on QFN16 may be connected to VCC– or left floating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad operational amplifier applications.

Compared with LM324DT, LM2902N offers tighter temperature specification and automotive qualification; compared with TLV2464CDR, it trades speed and output swing for wider supply range, lower quiescent current, and extended thermal reliability-making it optimal for harsh-environment industrial and automotive signal chains.

Availability

LM2902N is available at Aetrix Electronics and suitable for automotive cabin control, industrial 4–20 mA receivers, and medical patient monitor front-ends requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LM2902N 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 microcontrollers, power ICs, sensors, and analog components for automotive, industrial, and consumer markets.

The LM2902N belongs to ST's precision analog portfolio, engineered specifically for robust, low-power signal conditioning in electrically noisy and thermally demanding environments such as engine control units and programmable logic controller I/O modules.

FAQ

Is LM2902N pin-compatible with LM324?

Yes, LM2902N shares identical pinout and electrical behavior with LM324 across SO14 and TSSOP14 packages. Both feature four op amps with inverting/non-inverting inputs, outputs, and shared supply pins in the same arrangement. However, LM2902N adds AEC-Q100 qualification and guaranteed operation to +125 °C, whereas standard LM324 is rated to +105 °C.

Can LM2902N operate from a 3.3 V single supply?

Yes, LM2902N is fully specified for 3 V to 30 V single-supply operation. At 3.3 V, it maintains input common-mode range from 0 V to 1.8 V, output swing from 20 mV to 2.8 V (RL = 10 kΩ), and 375 µA per amplifier supply current. This enables direct interfacing with 3.3 V microcontrollers and ADCs without level-shifting.

What is the maximum capacitive load LM2902N can drive stably?

LM2902N is internally compensated for unity-gain stability with capacitive loads ≤100 pF. Driving larger loads (e.g., >500 pF cables or ADC input capacitance) requires isolation via a series resistor (≥100 Ω) between output and load to prevent peaking or oscillation, as confirmed by Figure 8 and Figure 11 in DS0506 Rev 10.

Does LM2902N support dual-supply operation with ±5 V?

Yes, LM2902N supports dual supplies from ±1.5 V to ±15 V. With ±5 V supplies, it delivers full rail-to-rail input range (–5 V to +3.5 V), output swing from –4.95 V to +4.95 V (RL = 10 kΩ), and maintains 100 dB open-loop gain and 1.3 MHz GBP-enabling precision bipolar signal processing in test equipment and audio preamps.