ZHCSHA6E May   2009  – January 2018 ADS1013 , ADS1014 , ADS1015

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      简化的方框图
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 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 Timing Requirements: I2C
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagrams
    3. 8.3 Feature Description
      1. 8.3.1 Multiplexer
      2. 8.3.2 Analog Inputs
      3. 8.3.3 Full-Scale Range (FSR) and LSB Size
      4. 8.3.4 Voltage Reference
      5. 8.3.5 Oscillator
      6. 8.3.6 Output Data Rate and Conversion Time
      7. 8.3.7 Digital Comparator (ADS1014 and ADS1015 Only)
      8. 8.3.8 Conversion Ready Pin (ADS1014 and ADS1015 Only)
      9. 8.3.9 SMbus Alert Response
    4. 8.4 Device Functional Modes
      1. 8.4.1 Reset and Power-Up
      2. 8.4.2 Operating Modes
        1. 8.4.2.1 Single-Shot Mode
        2. 8.4.2.2 Continuous-Conversion Mode
      3. 8.4.3 Duty Cycling For Low Power
    5. 8.5 Programming
      1. 8.5.1 I2C Interface
        1. 8.5.1.1 I2C Address Selection
        2. 8.5.1.2 I2C General Call
        3. 8.5.1.3 I2C Speed Modes
      2. 8.5.2 Slave Mode Operations
        1. 8.5.2.1 Receive Mode
        2. 8.5.2.2 Transmit Mode
      3. 8.5.3 Writing To and Reading From the Registers
      4. 8.5.4 Data Format
    6. 8.6 Register Map
      1. 8.6.1 Address Pointer Register (address = N/A) [reset = N/A]
        1. Table 4. Address Pointer Register Field Descriptions
      2. 8.6.2 Conversion Register (P[1:0] = 0h) [reset = 0000h]
        1. Table 5. Conversion Register Field Descriptions
      3. 8.6.3 Config Register (P[1:0] = 1h) [reset = 8583h]
        1. Table 6. Config Register Field Descriptions
      4. 8.6.4 Lo_thresh (P[1:0] = 2h) [reset = 8000h] and Hi_thresh (P[1:0] = 3h) [reset = 7FFFh] Registers
        1. Table 7. Lo_thresh and Hi_thresh Register Field Descriptions
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Basic Connections
      2. 9.1.2 Single-Ended Inputs
      3. 9.1.3 Input Protection
      4. 9.1.4 Unused Inputs and Outputs
      5. 9.1.5 Analog Input Filtering
      6. 9.1.6 Connecting Multiple Devices
      7. 9.1.7 Quickstart Guide
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Shunt Resistor Considerations
        2. 9.2.2.2 Operational Amplifier Considerations
        3. 9.2.2.3 ADC Input Common-Mode Considerations
        4. 9.2.2.4 Resistor (R1, R2, R3, R4) Considerations
        5. 9.2.2.5 Noise and Input Impedance Considerations
        6. 9.2.2.6 First-order RC Filter Considerations
        7. 9.2.2.7 Circuit Implementation
        8. 9.2.2.8 Results Summary
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
    1. 10.1 Power-Supply Sequencing
    2. 10.2 Power-Supply Decoupling
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12器件和文档支持
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 相关链接
    3. 12.3 Receiving Notification of Documentation Updates
    4. 12.4 Community Resources
    5. 12.5 商标
    6. 12.6 静电放电警告
    7. 12.7 Glossary
  13. 13机械、封装和可订购信息

8.6.4 Lo_thresh (P[1:0] = 2h) [reset = 8000h] and Hi_thresh (P[1:0] = 3h) [reset = 7FFFh] Registers

The upper and lower threshold values used by the comparator are stored in two 16-bit registers in two's complement format. The comparator is implemented as a digital comparator; therefore, the values in these registers must be updated whenever the PGA settings are changed.

The conversion-ready function of the ALERT/RDY pin is enabled by setting the Hi_thresh register MSB to 1 and the Lo_thresh register MSB to 0. To use the comparator function of the ALERT/RDY pin, the Hi_thresh register value must always be greater than the Lo_thresh register value. The threshold register formats are shown in Figure 22. When set to RDY mode, the ALERT/RDY pin outputs the OS bit when in single-shot mode, and provides a continuous-conversion ready pulse when in continuous-conversion mode.

Figure 22. Lo_thresh Register
15 14 13 12 11 10 9 8
Lo_thresh11 Lo_thresh10 Lo_thresh9 Lo_thresh8 Lo_thresh7 Lo_thresh6 Lo_thresh5 Lo_thresh4
R/W-1h R/W-0h R/W-0h R/W-0h R/W-0h R/W-0h R/W-0h R/W-0h
7 6 5 4 3 2 1 0
Lo_thresh3 Lo_thresh2 Lo_thresh1 Lo_thresh0 0 0 0 0
R/W-0h R/W-0h R/W-0h R/W-0h R-0h R-0h R-0h R-0h
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Figure 23. Hi_thresh Register
15 14 13 12 11 10 9 8
Hi_thresh11 Hi_thresh10 Hi_thresh9 Hi_thresh8 Hi_thresh7 Hi_thresh6 Hi_thresh5 Hi_thresh4
R/W-0h R/W-1h R/W-1h R/W-1h R/W-1h R/W-1h R/W-1h R/W-1h
7 6 5 4 3 2 1 0
Hi_thresh3 Hi_thresh2 Hi_thresh1 Hi_thresh0 1 1 1 1
R/W-1h R/W-1h R/W-1h R/W-1h R-1h R-1h R-1h R-1h
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset

Table 7. Lo_thresh and Hi_thresh Register Field Descriptions

BitFieldTypeResetDescription
15:4 Lo_thresh[11:0] R/W 800h Low threshold value
15:4 Hi_thresh[11:0] R/W 7FFh High threshold value
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