Texas Instruments ALM2402FQPWPRQ1

Overview

ALM2402FQPWPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 dual operational amplifier engineered for resolver excitation in automotive powertrain and chassis systems. It delivers 400 mA continuous output current per channel, 2.1 MHz gain bandwidth, 3.4 V/µs slew rate, and ±1 mV typical input offset voltage - enabling low-distortion, high-amplitude differential sine/cosine excitation signals up to 10 V_PP at 10 kHz in electric power steering and inverter control.

For engineers reviewing the ALM2402FQPWPRQ1 datasheet, ALM2402FQPWPRQ1 pinout, ALM2402FQPWPRQ1 application, or ALM2402FQPWPRQ1 equivalent, this page provides verified functional-safety-capable op amp specifications, thermal shutdown behavior, dual independent output-stage supply (VS_O1/VS_O2) configuration, and HTSSOP-14 package layout guidance - all critical for resolver driver design validation and EMI-sensitive motor control PCB integration.

Technical Context

The ALM2402FQPWPRQ1 implements a dual-rail architecture with separate signal-path supply (VS) and independent high-side output-stage supplies (VS_O1, VS_O2), allowing optimized headroom management for resolver excitation waveforms. Its rail-to-rail output stage uses low-R_DS(on) PMOS/NMOS transistors to achieve <5 mV rail swing under 10 kΩ loads while maintaining stability with ≥200 nF capacitive loads.

Functional safety support includes bidirectional OTF/SH_DN pin for overtemperature flagging and controlled shutdown, internal current limiting (750 mA sourcing / 550 mA sinking at 25°C), and EMI rejection filtering on both inputs. Thermal shutdown activates at 165°C with 6°C hysteresis, and junction-to-ambient R_θJA is 46.5°C/W in the thermally enhanced HTSSOP package.

Key Specifications

Pinout & Package

Package: 14-pin HTSSOP (PWP) with exposed thermal pad (5.00 mm × 4.40 mm body size); thermal pad must be connected to GND for optimal R_θJA = 46.5°C/W performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM7332QMA/NOPB and OPA454AIDDA, the ALM2402FQPWPRQ1 uniquely integrates AEC-Q100 Grade 1 operation, dual-channel 400 mA drive, independent output-stage supplies, and functional-safety-ready OTF/SH_DN signaling - making it the only qualified solution for production resolver excitation in EPS, brake, and inverter systems.

Availability

ALM2402FQPWPRQ1 is available at Aetrix Electronics and suitable for electric power steering (EPS), brake-by-wire, and inverter motor control applications requiring stable component supply, automotive-grade traceability, and long-term lifecycle support.

Supply support for ALM2402FQPWPRQ1 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

Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with deep expertise in automotive electronics and functional safety design.

The ALM2402FQPWPRQ1 belongs to TI's automotive-qualified precision amplifier portfolio, developed specifically to replace discrete op amp + transistor resolver drivers in ASIL-B systems while reducing board space and improving thermal robustness.

FAQ

What is the maximum continuous output current per channel for ALM2402FQPWPRQ1?

The ALM2402FQPWPRQ1 delivers 400 mA continuous output current per channel under recommended operating conditions (TA = –40°C to +125°C). This is confirmed in Section 6.3 of the datasheet, where "Continuous output current (sourcing)" and "(sinking)" are both specified as 400 mA. The device sustains this current with thermal shutdown activation at 165°C, ensuring safe operation in resolver excitation loads.

Does ALM2402FQPWPRQ1 support independent supply voltages for each amplifier's output stage?

Yes, ALM2402FQPWPRQ1 supports independent output-stage supplies via VS_O(1) (Pin 12) and VS_O(2) (Pin 10), separate from the signal-path supply VS (Pin 11). As described in Section 7.3.2, this allows asymmetric headroom configuration - for example, VS_O(1) = 12 V and VS_O(2) = 10 V - to fine-tune differential excitation amplitude matching in resolver applications without affecting signal integrity.

How does the OTF/SH_DN pin function in ALM2402FQPWPRQ1 during overtemperature events?

During overtemperature events, the ALM2402FQPWPRQ1 drives the OTF/SH_DN pin low to signal fault condition, regardless of external pull-up state. As detailed in Section 7.3.1, this pin is bidirectional: it outputs low when junction temperature exceeds 165°C, and also accepts low logic to force shutdown (~500 µA IQ). Critically, thermal shutdown overrides external enable - ensuring fail-safe disable even if OTF/SH_DN is externally held high.

Is ALM2402FQPWPRQ1 qualified for automotive safety-critical systems?

Yes, ALM2402FQPWPRQ1 is AEC-Q100 Grade 1 qualified (–40°C to +125°C) and explicitly labeled "Functional-Safety Capable" in its features list. TI provides functional safety documentation (FIT rate, FMD, safety analysis reports) to support ISO 26262 ASIL-B system development. Its integrated protections - thermal shutdown, current limiting, and OTF/SH_DN flagging - are designed for diagnostic coverage in safety-critical resolver interfaces.

What package type and thermal characteristics does ALM2402FQPWPRQ1 use?

ALM2402FQPWPRQ1 uses the 14-pin HTSSOP (PWP) package with 5.00 mm × 4.40 mm body size and an exposed thermal pad. Per Section 6.4, its junction-to-ambient thermal resistance (R_θJA) is 46.5°C/W. The thermal pad must be soldered to a PCB ground plane to achieve this rating; floating or misconnected pads degrade thermal performance and risk premature thermal shutdown under 400 mA load.