JAJSHV5B June   2017  – August 2019 ADS1287

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
    1.     Device Images
      1.      機能ブロック図
  4. 4 改訂履歴
  5. 5 概要（続き）
  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
    7. 7.7 Switching Characteristics
    8. 7.8 Typical Characteristics
  8. 8 Parameter Measurement Information
    1. 8.1 Noise Performance
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Analog Input and Multiplexer
      2. 9.3.2 Programmable Gain Amplifier (PGA)
      3. 9.3.3 Modulator
        1. 9.3.3.1 Modulator Overrange
      4. 9.3.4 Voltage Reference Inputs (REFP, REFN)
      5. 9.3.5 Digital Filter
        1. 9.3.5.1 Sinc Filter Stage
        2. 9.3.5.2 FIR Filter Stage
        3. 9.3.5.3 Group Delay and Step Response
          1. 9.3.5.3.1 Linear Phase Response
          2. 9.3.5.3.2 Minimum Phase Response
        4. 9.3.5.4 HPF Stage
      6. 9.3.6 Reset (RESET Pin and Reset Command)
      7. 9.3.7 Master Clock Input (CLK)
    4. 9.4 Device Functional Modes
      1. 9.4.1  Operational Mode
      2. 9.4.2  Chop Mode
      3. 9.4.3  Offset
      4. 9.4.4  Power-Down Mode
      5. 9.4.5  Standby Mode
      6. 9.4.6  Synchronization
        1. 9.4.6.1 Pulse-Sync Mode
        2. 9.4.6.2 Continuous-Sync Mode
      7. 9.4.7  Reading Data
        1. 9.4.7.1 Read-Data-Continuous Mode (RDATAC)
        2. 9.4.7.2 Stop-Read-Data-Continuous-Mode (SDATAC)
      8. 9.4.8  Conversion Data Format
      9. 9.4.9  Offset and Full-Scale Calibration Registers
        1. 9.4.9.1 OFC[2:0] Registers
        2. 9.4.9.2 FSC[2:0] Registers
      10. 9.4.10 Calibration Command
        1. 9.4.10.1 OFSCAL Command
        2. 9.4.10.2 GANCAL Command
      11. 9.4.11 User Calibration
    5. 9.5 Programming
      1. 9.5.1 Serial Interface
        1. 9.5.1.1 Chip Select (CS)
        2. 9.5.1.2 Serial Clock (SCLK)
        3. 9.5.1.3 Data Input (DIN)
        4. 9.5.1.4 Data Output (DOUT)
        5. 9.5.1.5 Serial Interface Timeout
        6. 9.5.1.6 Data Ready (DRDY)
      2. 9.5.2 Commands
        1. 9.5.2.1  WAKEUP: Wake Up Command
        2. 9.5.2.2  STANDBY: Standby Mode Command
        3. 9.5.2.3  SYNC: Synchronize ADC Conversions
        4. 9.5.2.4  RESET: Reset Command
        5. 9.5.2.5  RDATAC: Read Data Continuous Mode Command
        6. 9.5.2.6  SDATAC: Stop Read Data Continuous Mode Command
        7. 9.5.2.7  RDATA: Read Data Command
        8. 9.5.2.8  RREG: Read Register Data Command
        9. 9.5.2.9  WREG: Write Register Data Command
        10. 9.5.2.10 OFSCAL: Offset Calibration Command
        11. 9.5.2.11 GANCAL: Gain Calibration Command
    6. 9.6 Register Map
      1. 9.6.1 Register Descriptions
        1. 9.6.1.1 ID/CFG: ID, Configuration Register (address = 00h) [reset = x0h]
          1. Table 22. ID/CFG Register Field Descriptions
        2. 9.6.1.2 CONFIG0: Configuration Register 0 (address = 01h) [reset = 52h]
          1. Table 23. CONFIG0 Register Field Descriptions
        3. 9.6.1.3 CONFIG1: Configuration Register 1 (address = 02h) [reset = 08h]
          1. Table 24. CONFIG1 Register Field Descriptions
        4. 9.6.1.4 High-Pass Filter Corner Frequency (HPFx) Registers (address = 03h, 04h) [reset = 32h, 03h]
          1. Table 25. HPF0, HPF1 Registers Field Description
        5. 9.6.1.5 Offset Calibration (OFCx) Registers (address = 05h, 06h, 07h) [reset = 00h, 00h, 00h]
          1. Table 26. OFC0, OFC1, OFC2 Registers Field Description
        6. 9.6.1.6 Full-Scale Calibration (FSCx) Registers (address = 08h, 09h, 0Ah) [reset = 00h, 00h, 40h]
          1. Table 27. FSC0, FSC1, FSC2 Registers Field Description
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Applications
      1. 10.2.1 Geophone Application
      2. 10.2.2 Digital Interface
    3. 10.3 Initialization Set Up
  11. 11Power Supply Recommendations
    1. 11.1 Analog Power Supplies
    2. 11.2 Digital Power Supply
    3. 11.3 Power-Supply Sequence
  12. 12Layout
    1. 12.1 Layout Guidelines
  13. 13デバイスおよびドキュメントのサポート
    1. 13.1 ドキュメントの更新通知を受け取る方法
    2. 13.2 コミュニティ・リソース
    3. 13.3 商標
    4. 13.4 静電気放電に関する注意事項
    5. 13.5 Glossary
  14. 14メカニカル、パッケージ、および注文情報

パッケージ・オプション

デバイスごとのパッケージ図は、PDF版データシートをご参照ください。

メカニカル・データ（パッケージ｜ピン）
  • RHF|24
サーマルパッド・メカニカル・データ
発注情報

9.5.2.8 RREG: Read Register Data Command

The RREG command is used to read a single register byte or to read multiple register bytes. The command consists of a two-byte argument followed by the output of register data. The first byte of the command is the register starting address, and the second byte specifies the number of registers to read minus one.

First command byte: 001r rrrr, where rrrrr is the starting address of the first register.

Second command byte: 000n nnnn, where nnnnn is the number of registers to read minus one.

In the read register data example sequence shown in Figure 66, with the 24th falling edge of SCLK, the first register data bit appears on DOUT. Read the first bit of register data on the 25th SCLK rising edge.

See the Timing Requirements table for the specification of the td(CMBT) parameter.

ADS1287 com_rreg_sbas778.gif
1. DOUT is in tri-state when CS is high.
Figure 66. Read Register Data

In read-data-continuous mode, the output data shift register is written with new conversion data just before DRDY transitions low. To avoid conflicting data between conversion data and register data, send the SDATAC command before reading register data. The SDATAC command disables loading of conversion data into the output data shift register. Keep CS low between the SDATAC command and the read register command because CS high cancels the SDATAC mode.