STMicroelectronics LM2902AWYDT

Overview

LM2902AWYDT from STMicroelectronics is a quad operational amplifier optimized for automotive-grade industrial control systems, featuring 1.3 MHz gain bandwidth, 100 dB large-signal voltage gain, ±1.5 V to ±15 V dual-supply or 3 V to 30 V single-supply operation, and input common-mode range extending to the negative rail - enabling robust signal conditioning in battery-powered sensor interfaces and motor control feedback loops.

For engineers reviewing the LM2902AWYDT datasheet, LM2902AWYDT pinout, LM2902AWYDT application, or LM2902AWYDT equivalent, this device is selected for precision DC-coupled amplification, low-power rail-to-rail input operation, high CMRR (70–80 dB), ESD-hardened design (800 V HBM), and AEC-Q100 qualified reliability in harsh-temperature environments (−40 °C to +125 °C).

Technical Context

The LM2902AWYDT integrates four independent, internally frequency-compensated op-amps with PNP-input stage architecture, enabling rail-to-negative-rail common-mode input operation and stable unity-gain performance across temperature. Its input bias current (20 nA typ.) and offset current (2 nA typ.) support high-impedance transducer interfacing without significant error drift.

Designed for single-supply operation down to 3 V, it maintains consistent 375 µA per amplifier supply current across 3–30 V supply range and delivers 20 mA output sink/source capability. The device includes integrated ESD protection (800 V HBM) on all pins and operates reliably under automotive thermal stress (R_thJA = 105 °C/W for SO14 package).

Key Specifications

Pinout & Package

LM2902AWYDT is supplied in SO14 (Small Outline 14-pin) package with standard JEDEC outline, 1.27 mm pitch, and 8.55–8.75 mm body length. Pin 1 is marked by notch or dot; device is lead-free and RoHS-compliant per ECOPACK2 specification.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM2902WYDT, LM2902AWYDT delivers tighter DC accuracy critical for closed-loop control, while TSV914IQ4T offers speed advantages at the expense of automotive reliability and temperature range - making LM2902AWYDT the sole drop-in solution for AEC-Q100-compliant, precision analog front-ends.

Availability

LM2902AWYDT is available at Aetrix Electronics and suitable for automotive body control modules, industrial motor drive feedback systems, smart sensor transmitters, and battery monitoring units requiring stable component supply across extended temperature and lifecycle demands.

Supply support for LM2902AWYDT 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 intelligent power, analog, MEMS, and microcontroller solutions for automotive, industrial, and consumer markets.

LM2902AWYDT belongs to ST's automotive-qualified operational amplifier product line, engineered specifically for high-reliability analog signal conditioning in safety-critical vehicle subsystems operating under extreme thermal and electrical stress.

FAQ

Is LM2902AWYDT pin-compatible with standard LM2902 variants?

Yes, LM2902AWYDT uses the industry-standard SO14 footprint and pinout defined in JEDEC MS-012, matching LM2902WDT, LM2902WYDT, and legacy LM2902N. All four amplifiers share identical terminal assignments, allowing direct replacement in existing layouts without PCB revision - provided thermal and accuracy requirements are verified.

What is the maximum capacitive load the LM2902AWYDT can drive without instability?

LM2902AWYDT remains stable with up to 100 pF capacitive load when driving a 2 kΩ resistive load, as confirmed by phase margin measurements ≥25° across −40 °C to +125 °C (Fig. 22). For loads >100 pF, a series resistor (≥100 Ω) between output and capacitor is required to maintain ≥45° phase margin and prevent ringing in sensor buffer applications.

Does LM2902AWYDT support true rail-to-rail output swing?

No - LM2902AWYDT features rail-to-rail *input* operation but not rail-to-rail output. At V_CC+ = 5 V, typical high-level output is 3.5 V and low-level is 5 mV (Table 3), limiting dynamic range to ~3.45 V. This is sufficient for interfacing with 12-bit SAR ADCs (e.g., STM32 internal ADC) but requires headroom consideration in 5 V logic-level systems.

How does the LM2902AWYDT's input bias current affect high-impedance sensor interfaces?

With 20 nA typical input bias current (max 150 nA over temperature), LM2902AWYDT introduces ≤1.5 mV error across a 100 kΩ source impedance - acceptable for thermistor, RTD, or piezoresistive sensor conditioning. For ultra-high-Z sources (>1 MΩ), parallel input resistors must be minimized or compensated using matched auxiliary amplifiers (Fig. 31) to avoid offset drift.