SBAS480C september   2009  – june 2023 ADS1000-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Pin Configuration and Functions
  7. 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
    6. 6.6 Timing Requirements
    7. 6.7 Timing Diagram
    8. 6.8 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Analog-to-Digital Converter
      2. 7.3.2 Clock Generator
    4. 7.4 Device Functional Modes
      1. 7.4.1 Operating Modes
      2. 7.4.2 Reset and Power Up
    5. 7.5 Programming
      1. 7.5.1 I2C Interface
      2. 7.5.2 ADS1000-Q1 I2C Addresses
      3. 7.5.3 I2C General Call
      4. 7.5.4 I2C Data Rates
      5. 7.5.5 Output Code Calculation
    6. 7.6 Register Maps
      1. 7.6.1 Output Register
      2. 7.6.2 Configuration Register
      3. 7.6.3 Reading From the ADS1000-Q1
      4. 7.6.4 Writing to the ADS1000-Q1
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Basic Connections
        1. 8.1.1.1 Connecting Multiple Devices
        2. 8.1.1.2 Using GPIO Ports For I2C
        3. 8.1.1.3 Single-Ended Inputs
    2. 8.2 Typical Applications
      1. 8.2.1 ADS1000-Q1 With Current-Shunt Monitor
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Part Selection
            1. 8.2.1.2.1.1 Gain Settings
            2. 8.2.1.2.1.2 Circuit Implementation
        3. 8.2.1.3 Application Curve
      2. 8.2.2 Low-Side Current Measurement
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Receiving Notification of Documentation Updates
    2. 9.2 Support Resources
    3. 9.3 Trademarks
    4. 9.4 Electrostatic Discharge Caution
    5. 9.5 Glossary
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.2.2.1 Design Requirements

Figure 8-7 shows a circuit for a low-side, shunt-type current monitor. The circuit reads the voltage across a shunt resistor, which is sized as small as possible while still giving a readable output voltage. This voltage is amplified by an OPA333-Q1 low-drift operational amplifier, and the result is read by the ADS1000-Q1. The maximum voltage across the current shunt is 50 mV. This design uses a 5-V power supply.