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  • ALM2402F-Q1 Automotive, Dual Operational Amplifier With High Current Output for Resolver Excitation

    • SBOS927B May   2019  – October 2021 ALM2402F-Q1

      PRODUCTION DATA  

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  • ALM2402F-Q1 Automotive, Dual Operational Amplifier With High Current Output for Resolver Excitation
  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics: VS = 12 V
    6. 6.6 Electrical Characteristics: VS = 5 V
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 OTF/SH_DN
      2. 7.3.2 Output Stage Supply Voltage
      3. 7.3.3 Current-Limit and Short-Circuit Protection
      4. 7.3.4 Input Common-Mode Overvoltage Clamps
      5. 7.3.5 Thermal Shutdown
      6. 7.3.6 Output Stage
      7. 7.3.7 EMI Susceptibility and Input Filtering
    4. 7.4 Device Functional Modes
      1. 7.4.1 Open-Loop and Closed-Loop Operation
      2. 7.4.2 Shutdown
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Capacitive Load and Stability
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Resolver Excitation Input (Op Amp Output)
          1. 8.2.2.1.1 Excitation Voltage
          2. 8.2.2.1.2 Excitation Frequency
          3. 8.2.2.1.3 Excitation Impedance
        2. 8.2.2.2 Resolver Output
        3. 8.2.2.3 Power Dissipation and Thermal Reliability
          1. 8.2.2.3.1 Improving Package Thermal Performance
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information
  13. IMPORTANT NOTICE

Package Options

Mechanical Data (Package|Pins)
  • PWP|14
    • MPDS370A
Thermal pad, mechanical data (Package|Pins)
  • PWP|14
    • PPTD332B
Orderable Information
  • sbos927b_oa
  • sbos927b_pm
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DATA SHEET

ALM2402F-Q1 Automotive, Dual Operational Amplifier With High Current Output for Resolver Excitation

1 Features

  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional-Safety Capable
    • Documentation available to aid functional safety system design
  • Low offset voltage: 1 mV (typical)
  • High output current drive: 400 mA, continuous (per channel)
    • Replaces discrete op amps and transistors
  • Wide supply range for both supplies (up to 16 V)
  • Overtemperature shutdown
  • Current limit
  • Shutdown pin for low IQ applications
  • Stable with large capacitive loads
  • 2-MHz gain bandwidth with 3.4-V/µs slew rate
  • Internal RF/EMI filter
  • Package: 14-pin HTSSOP (PWP)

2 Applications

  • Resolver-based automotive applications
  • Inverter and motor control
  • Brake system
  • Electric power steering (EPS)
  • Rearview mirror module
  • Automotive eMirrors
  • Servo drive power stage module

3 Description

The ALM2402F-Q1 is a dual-power op amp with features and performance that make this device preferable for resolver-based automotive 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 a low distortion and differential high amplitude excitation required for modern resolvers. Current limiting and overtemperature detection enhance overall system robustness when driving analog signals over wires that are susceptible to faults.

The ALM2402F-Q1 rail-to-rail output, enabled by the low Rds(on) PMOS and NMOS transistors, keeps the power dissipation low. The small HTSSOP package with thermal pad and low RθJA allows users to deliver high currents to loads while minimizing board space. This minimized board space is one of the key advantages offered by the ALM2402F-Q1 when used in modern hybrid and electric vehicles.

The ALM2402F-Q1 maximum output voltage is determined using the Maximum Output Voltage vs Frequency plot at the bottom of this page.

Device Information(1)
PART NUMBERPACKAGEBODY SIZE (NOM)
ALM2402F-Q1HTSSOP (14)5.00 mm × 4.40 mm
(1) For all available packages, see the package option addendum at the end of the data sheet.

 

GUID-7BD2F2CA-AC51-49CF-ABBC-DAE42C43E3B2-low.gifSimplified Schematic
GUID-13088000-AD36-4F9F-B92D-4ED546502183-low.gifMaximum Output Voltage vs Frequency

4 Revision History

Changes from Revision A (September 2019) to Revision B (October 2021)

  • Updated the numbering format for tables, figures, and cross-references throughout the documentGo
  • Added functional safety bullets to Features sectionGo

Changes from Revision * (May 2019) to Revision A (September 2019)

  • Changed device from advanced information (preview) to production data (active)Go

5 Pin Configuration and Functions

Figure 5-1 PWP (14-Pin HTSSOP) Package, Top View
Table 5-1 Pin Functions
PIN I/O DESCRIPTION
NAME NO.
GND 6, 14 Input Ground pin (both ground pins must be used and connected together on board)
IN(1)+ 2 Input Noninverting op amp input terminal 1
IN(2)+ 4 Input Noninverting op amp input terminal 2
IN(1)– 1 Input Inverting op amp input terminal 1
IN(2)– 5 Input Inverting op amp input terminal 2
NC 7, 8 — No internal connection (do no connect)
OTF/SH_DN 3 Input/output Overtemperature flag and shutdown (see Table 7-1 for truth table)
OUT(1) 13 Output Op amp output 1
OUT(2) 9 Output Op amp output 2
VS 11 Input Gain stage supply pin
VS_O(1) 12 Input Output stage supply pin
VS_O(2) 10 Input Output stage supply pin
Thermal pad — — Connect the exposed thermal pad to ground for best thermal performance. Do not connect the thermal pad to any pin other than GND. The thermal pad can also be left floating.

 
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