STMicroelectronics LM2904AYDT

Overview

LM2904AYDT from STMicroelectronics is a dual, low-power operational amplifier optimized for automotive-grade single-supply operation (3 V to 30 V), featuring rail-to-rail input (including negative rail) and output swing to within 1.5 V of VCC+, 1.1 MHz unity-gain bandwidth, 100 dB large-signal voltage gain, and 20 nA max input bias current at 25 °C. It targets transducer signal conditioning and DC gain blocks in engine control units and battery management systems.

For engineers reviewing the LM2904AYDT datasheet, LM2904AYDT pinout, LM2904AYDT application, or LM2904AYDT equivalent, key selection criteria include its AEC-Q100 qualified SO8 package, −40 °C to +125 °C operating range, enhanced ESD robustness (2 kV HBM), and guaranteed 1 mV max input offset voltage over temperature.

Technical Context

This dual op-amp integrates frequency compensation internally and uses PNP input stage architecture enabling common-mode input voltage down to VCC− (ground in single-supply mode). Its differential input voltage range equals full supply voltage (±32 V for non-W variants), supporting wide dynamic range sensing without external level-shifting.

The device delivers stable unity-gain operation with 0.3 V/µs min slew rate and 0.7–1.1 MHz gain-bandwidth product across 3–30 V supply, while maintaining 65–100 dB supply voltage rejection and 70–85 dB common-mode rejection - critical for noisy automotive power domains.

Key Specifications

Pinout & Package

LM2904AYDT is supplied in an SO8 package (standard small-outline integrated circuit, 150 mil width), with wettable flank option available for automated optical inspection. Pin mapping is identical across SO8, MiniSO8, TSSOP8, and DFN8 variants.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM2904DT and TSB572IDT, LM2904AYDT uniquely combines AEC-Q100 Grade 1 qualification, 125 °C operation, 2 kV HBM ESD, and guaranteed 1 mV offset over temperature - making it the only choice for safety-critical engine and transmission control circuits.

Availability

LM2904AYDT is available at Aetrix Electronics and suitable for automotive engine control units, battery monitoring systems, and electric power steering modules requiring stable component supply across long production lifecycles.

Supply support for LM2904AYDT 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.

LM2904AYDT belongs to ST's automotive-qualified precision op-amp family, engineered specifically for robust signal conditioning in harsh-temperature, high-EMI environments like powertrain and chassis control systems.

FAQ

Is LM2904AYDT pin-compatible with standard LM2904 variants?

Yes - LM2904AYDT uses the same SO8 footprint and pinout as LM2904DT, LM2904PT, and LM2904ST. All share identical electrical pin functions (Out1, In1−, In1+, VCC−, In2+, In2−, Out2, VCC+), enabling drop-in replacement in existing layouts without redesign.

What is the maximum capacitive load LM2904AYDT can drive stably?

LM2904AYDT maintains phase margin >45° with ≤100 pF capacitive load in unity-gain configuration, per Figure 20 in DS0508. For loads >100 pF, a series isolation resistor (≥100 Ω) between output and capacitance is required to prevent oscillation.

Does LM2904AYDT support dual-supply operation?

Yes - though optimized for single-supply use, LM2904AYDT operates with split supplies (e.g., ±15 V) within absolute maximum ratings (±16 V total). Input common-mode range extends to VCC−, and output swing remains symmetric about mid-rail when biased appropriately.

How does the "Y" suffix in LM2904AYDT denote automotive qualification?

The "Y" suffix indicates AEC-Q100 Grade 1 qualification (−40 °C to +125 °C), enhanced ESD robustness (2 kV HBM), and advanced screening per AEC-Q001/Q002. This distinguishes it from industrial-grade LM2904DT (no Y) and ensures compliance for under-hood deployment.