Product details


Number of channels (#) 2 Total supply voltage (Min) (+5V=5, +/-5V=10) 5 Total supply voltage (Max) (+5V=5, +/-5V=10) 24 Output current (Typ) (mA) 450 GBW (Typ) (MHz) 21 Slew rate (Typ) (V/us) 50 Vos (offset voltage @ 25 C) (Max) (mV) 25 Offset drift (Typ) (uV/C) 15 Iq per channel (Typ) (mA) 3.6 Features EMI Hardened, High Cload Drive, Shutdown Rating Automotive Operating temperature range (C) -40 to 125 TI functional safety category Functional Safety-Capable Input bias current (Max) (pA) 100 CMRR (Typ) (dB) 94 Rail-to-rail In, Out Architecture Bipolar open-in-new Find other Power op amps

Package | Pins | Size

HTSSOP (PWP) 14 32 mm² 5 x 6.4 open-in-new Find other Power op amps


  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional-safety capable
  • High output current drive: 650 mA, peak (per channel)
    • Replaces discrete op amps and transistors
  • Wide supply range for both supplies (up to 24 V)
  • Overtemperature shutdown
  • Current limit
  • Shutdown pin for low IQ applications
  • 21-MHz gain bandwidth with 50-V/µs slew rate
  • Package: 14-pin HTSSOP (PWP)
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The ALM2403-Q1 is a dual-power op amp with features and performance that make this device preferable for resolver-based applications. The high-gain bandwidth and slew rate of the device, along with a continuous high-output current-drive capability, make this device an excellent choice to provide the low distortion and differential high-amplitude excitation required for exciting the resolver primary coil. Current limiting and overtemperature detection enhance overall system robustness, especially when driving analog signals over wires that are susceptible to faults.

The small HTSSOP package with thermal pad and low RθJA allows high currents to be delivered to loads while minimizing board space. The higher gain bandwidth of the ALM2403-Q1 allows the device to be configured as a filter stage while still providing high output drive, thus significantly reducing the total solution size of a resolver drive signal chain. This reduced solution size is a key advantage offered by the ALM2403-Q1 when used in automotive and industrial applications.


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Technical documentation

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Type Title Date
* Data sheet ALM2403-Q1 Automotive, Low-Distortion, Dual-Channel Operational Amplifier With Integrated Protection for Resolver Drive datasheet Nov. 30, 2020
Application note Parallel Amplifiers for Higher Output Power: An Improved Howland Pump Approach Jul. 11, 2021
User guide ALM2403-Q1 Evaluation Module User's Guide (Rev. A) Mar. 23, 2021
Application note Applying the ALM2403-Q1 Single-Chip Resolver Solution to Reduce System Costs Dec. 22, 2020
Functional safety information ALM2403-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA Nov. 30, 2020
Application note Overvoltage Protection of Resolver-Based Circuits Nov. 19, 2020
Certificate ALM2403Q1EVM EU Declaration of Conformity (DoC) Jun. 19, 2020
Technical article Improve efficiency in your HEV/EV resolver Nov. 27, 2019

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide
The ALM2403-Q1 is an automotive grade, dual high-voltage, high current operational amplifier (op amp) with protection features from Texas Instruments. This ALM2403Q1EVM evaluation module (EVM) is designed to provide access to the features and measure the performance of the ALM2403-Q1 device.
  • The ALM2403Q1EVM has by default both amplifiers configured in the inverting configuration with a gain of -2.5-V/V

Design tools & simulation

SBOMBJ2.TSC (1518 KB) - TINA-TI Reference Design
SBOMBJ3.ZIP (10 KB) - TINA-TI Spice Model
SBOMBJ4.ZIP (18 KB) - PSpice Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
document-generic User guide
Analog engineer's calculator
ANALOG-ENGINEER-CALC — The Analog Engineer’s Calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting op-amp gain with feedback (...)
  • Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
    • Noise calculations
    • Common unit translation
  • Solves common amplifier circuit design problems
    • Gain selections using standard resistors
    • Filter configurations
    • Total noise for common amplifier configurations
  • (...)

CAD/CAE symbols

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HTSSOP (PWP) 14 View options

Ordering & quality

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