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  • LDC5072-Q1 Inductive Position Sensor Front-End With Sin/Cos Interface

    • SNOSD47C december   2018  – july 2023 LDC5072-Q1

      PRODUCTION DATA  

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  • LDC5072-Q1 Inductive Position Sensor Front-End With Sin/Cos Interface
  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Description (cont.)
  7. 6 Pin Configuration and Functions
  8. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Diagnostics
    7. 7.7 Switching Characteristics
    8. 7.8 Typical Characteristics
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Input Supply Voltage
      2. 8.3.2 Excitation Signal
      3. 8.3.3 Signal Processing Block
        1. 8.3.3.1 Demodulation
        2. 8.3.3.2 Fixed Gain Control
        3. 8.3.3.3 Automatic Gain Control
      4. 8.3.4 Output Stage
      5. 8.3.5 Diagnostics
        1. 8.3.5.1 Undervoltage Diagnostics
        2. 8.3.5.2 Initialization Diagnostics
        3. 8.3.5.3 Normal State Diagnostics
        4. 8.3.5.4 Fault State Diagnostics
    4. 8.4 Device Functional Modes
      1. 8.4.1 IDLE State
      2. 8.4.2 DIAGNOSTICS State
      3. 8.4.3 NORMAL State
      4. 8.4.4 FAULT State
      5. 8.4.5 DISABLED State
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 5-V Supply Mode
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 VREG and VCC
          2. 9.2.1.2.2 Output Capacitors
          3. 9.2.1.2.3 AGC Mode
        3. 9.2.1.3 Application Curve
      2. 9.2.2 3.3-V Supply Mode
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
          1. 9.2.2.2.1 VREG and VCC
          2. 9.2.2.2.2 Output Capacitors
          3. 9.2.2.2.3 Fixed Gain Mode
      3. 9.2.3 Redundancy Mode
      4. 9.2.4 Single-Ended Mode
      5. 9.2.5 External Diagnostics Required for Loss of VCC or GND
  11. 10Power Supply Recommendations
    1. 10.1 Mode 1: VCC = 5 V, VREG = 3.3 V
    2. 10.2 Mode 2: VCC = VREG = 3.3 V
  12. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  13. 12Device and Documentation Support
    1. 12.1 Receiving Notification of Documentation Updates
    2. 12.2 Support Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  14. 13Mechanical, Packaging, and Orderable Information
  15. IMPORTANT NOTICE

Package Options

Mechanical Data (Package|Pins)
  • PW|16
    • MPDS361A
Thermal pad, mechanical data (Package|Pins)
Orderable Information
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  • snosd47c_pm
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Data Sheet

LDC5072-Q1 Inductive Position Sensor Front-End With Sin/Cos Interface

1 Features

  • AEC-Q100 qualified with the following results:
    • Device temperature grade 0: –40°C to +160°C ambient operating temperature
  • Integrated analog front-end IC for contact-less, inductive position sensors for absolute rotary position from 0° to 360°
  • Removes the need for magnets, lowering system cost
  • Supports operation in harsh environments; immune to stray magnetic fields, dirt, and contamination
  • High resolution and accuracy of ≤ 1 degree at rotational speeds up to 480,000 RPM
  • Differential signal paths with sine and cosine outputs supporting a wide dynamic input range
  • 5-V and 3.3-V input supply operating modes
  • Integrated LC oscillator in the 2.4-MHz to 5-MHz band to excite the inductive sensor coil
  • Differential output drivers with high-voltage protection and large capacitive load capability
  • Automatic and manual gain control to maximize dynamic range of output drivers
  • Functional Safety-Compliant
    • Developed for functional safety applications
    • Documentation available to aid ISO 26262 system design
    • Systematic capability up to ASIL C(D)
    • Hardware capability up to ASIL C
  • Extensive IC, sensor input, output, and supply pin diagnostics
  • Reverse voltage and overvoltage protection on input supply and output pins from –15 V to 30 V
  • Supports redundant mode for functional safety

2 Applications

  • Rotary Position Sensors for:
    • EV/HEV traction motor inverters
    • Electric power steering
    • Brake boost motors
    • Integrated starter generators
  • Small angular or arc-motion sensors for:
    • Pedal position
    • Valves and actuators
    • Robots

3 Description

The LDC5072-Q1 IC is an analog front-end for contact-less, inductive position sensors targeted for absolute rotary position in automotive and industrial applications. The LDC5072-Q1 excites a coil that is typically printed on a printed circuit board (PCB). The excitation is coupled back into two sets of receiver coils on the same PCB using a conductive target that is placed in close proximity of the PCB. The conductive target can also be a pattern printed on another PCB. The coil PCB stays stationary and the target moves with the motor, actuator, or valve. The excitation coil generates a secondary voltage on the receiver coils depending on the position of the target relative to the receiver coils. A signal representation of the position is obtained by reading in the voltages from the receiver coils, processing it, and giving analog outputs representing the Sine and Cosine components of the position of the target.

Device Information(1)
PART NUMBER PACKAGE BODY SIZE (NOM)
LDC5072-Q1 TSSOP (16) 5.00 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
GUID-20210415-CA0I-J1TC-ZZ8L-2WNVJPC6TCGL-low.svg LDC5072-Q1 Typical Application Diagram

 
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