STMicroelectronics LM2904WHDT

Overview

LM2904WHDT from STMicroelectronics is a dual, low-power, rail-to-rail input operational amplifier in SO8 package, designed for automotive and industrial control systems. It features 100 dB DC gain, 1.1 MHz unity-gain bandwidth, 500 µA supply current per amplifier, 20 nA input bias current, and input common-mode range extending to ground - enabling single-supply operation from 3 V to 30 V in transducer amplifiers and DC gain blocks.

For engineers reviewing the LM2904WHDT datasheet, LM2904WHDT pinout, LM2904WHDT application, or LM2904WHDT equivalent, key selection considerations include its AEC-Q100-qualified SO8 packaging, -40°C to +150°C operating range, input offset voltage ≤7 mV (typ), output swing to 0 V, and ESD robustness (2 kV HBM).

Technical Context

This dual op-amp integrates internal frequency compensation and operates across a 3–30 V single supply. Its input stage supports common-mode voltages down to ground and up to VCC − 1.5 V, while the output delivers 0 V to VCC − 1.5 V swing under 2 kΩ load - critical for interfacing with logic-level microcontrollers and sensors in automotive ECUs.

The device uses bipolar input transistors with temperature-compensated biasing, achieving 2 nA max input offset current and 7 µV/°C typical offset drift. Its 0.6 V/µs slew rate and 1.1 MHz GBP support stable closed-loop operation in precision DC-coupled signal conditioning without external compensation.

Key Specifications

Pinout & Package

LM2904WHDT is supplied in an SO8 (Small Outline Integrated Circuit, 8-pin) package with standard 1.27 mm pitch, 4.90 mm × 6.00 mm body, and 1.75 mm height. The package complies with JEDEC MS-012 and is RoHS-compliant and ECOPACK® certified.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual low-power op-amp applications.

Compared with LM2904VQDR, LM2904WHDT offers lower cost and proven under-hood reliability at 30 V max, while TSV912IDT trades automotive qualification for higher bandwidth and rail-to-rail output - making LM2904WHDT optimal for cost-sensitive, high-temp automotive signal chains where 1.1 MHz and 0 V output are sufficient.

Availability

LM2904WHDT is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drives, and cabin air quality monitoring systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LM2904WHDT 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, delivering silicon solutions for automotive, industrial, power management, and microcontroller applications.

LM2904WHDT belongs to ST's automotive-qualified precision analog portfolio, engineered specifically for robust, low-power signal conditioning in harsh-temperature environments such as engine control, braking systems, and battery management.

FAQ

Is LM2904WHDT pin-compatible with standard LM2904 variants?

Yes - LM2904WHDT uses the industry-standard SO8 pinout (OUT1, IN1−, IN1+, GND, IN2+, IN2−, OUT2, VCC+) and is functionally compatible with LM2904, LM2904B, and LM2904V. However, it adds AEC-Q100 qualification, extended temperature range (−40°C to +150°C), and tighter input offset drift (7 µV/°C typ), making it suitable for automotive deployment where legacy versions are not qualified.

Can LM2904WHDT operate from a 3.3 V supply?

Yes - LM2904WHDT is fully specified from 3 V to 30 V. At 3.3 V, it maintains 0 V to 1.8 V output swing, 100 dB gain, and 20 nA input bias current. Its input common-mode range includes ground, allowing direct interfacing with 3.3 V microcontroller ADC references and sensors without level-shifting circuitry.

What is the maximum capacitive load LM2904WHDT can drive stably?

LM2904WHDT is stable driving up to 100 pF capacitive load with 2 kΩ series resistance, as verified in Figure 5 (Large signal frequency response) and Figure 6 (pulse response). For loads >100 pF, a 20–100 Ω isolation resistor in series with the output is recommended to maintain phase margin and prevent peaking or oscillation.

Does LM2904WHDT require external compensation components?

No - LM2904WHDT integrates frequency compensation internally, enabling stable unity-gain operation without external capacitors or resistors. This is confirmed in the "Features" section and validated by open-loop gain plots (Figure 4) showing ≥45° phase margin across 0.1 Hz–10 MHz at all temperatures and supply voltages.