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  • ADS8860 16 位、1MSPS、串行接口、微功耗、微型、单端输入、SAR 模数转换器

    • ZHCSBG2B May   2013  – February 2019 ADS8860

      PRODUCTION DATA.  

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  • ADS8860 16 位、1MSPS、串行接口、微功耗、微型、单端输入、SAR 模数转换器
  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      ADC 电源无需独立的 LDO
  4. 4 修订历史记录
  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: 3-Wire Operation
    7. 7.7 Timing Requirements: 4-Wire Operation
    8. 7.8 Timing Requirements: Daisy-Chain
    9. 7.9 Typical Characteristics
  8. 8 Parameter Measurement Information
    1. 8.1 Equivalent Circuits
  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
      2. 9.3.2 Reference
      3. 9.3.3 Clock
      4. 9.3.4 ADC Transfer Function
    4. 9.4 Device Functional Modes
      1. 9.4.1 CS Mode
        1. 9.4.1.1 3-Wire CS Mode Without a Busy Indicator
        2. 9.4.1.2 3-Wire CS Mode With a Busy Indicator
        3. 9.4.1.3 4-Wire CS Mode Without a Busy Indicator
        4. 9.4.1.4 4-Wire CS Mode With a Busy Indicator
      2. 9.4.2 Daisy-Chain Mode
        1. 9.4.2.1 Daisy-Chain Mode Without a Busy Indicator
        2. 9.4.2.2 Daisy-Chain Mode With a Busy Indicator
  10. 10Application and Implementation
    1. 10.1 Application Information
      1. 10.1.1 ADC Reference Driver
      2. 10.1.2 ADC Input Driver
        1. 10.1.2.1 Input Amplifier Selection
        2. 10.1.2.2 Charge-Kickback Filter
    2. 10.2 Typical Applications
      1. 10.2.1 DAQ Circuit for a 1-µs, Full-Scale Step Response
        1. 10.2.1.1 Design Requirements
        2. 10.2.1.2 Detailed Design Procedure
      2. 10.2.2 DAQ Circuit for Lowest Distortion and Noise Performance at 1 MSPS
        1. 10.2.2.1 Design Requirements
        2. 10.2.2.2 Detailed Design Procedure
      3. 10.2.3 Ultralow-Power DAQ Circuit at 10 kSPS
        1. 10.2.3.1 Design Requirements
        2. 10.2.3.2 Detailed Design Procedure
  11. 11Power Supply Recommendations
    1. 11.1 Power-Supply Decoupling
    2. 11.2 Power Saving
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13器件和文档支持
    1. 13.1 文档支持
      1. 13.1.1 相关文档
    2. 13.2 接收文档更新通知
    3. 13.3 社区资源
    4. 13.4 商标
    5. 13.5 静电放电警告
    6. 13.6 术语表
  14. 14机械、封装和可订购信息
  15. 重要声明
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DATA SHEET

ADS8860 16 位、1MSPS、串行接口、微功耗、微型、单端输入、SAR 模数转换器

本资源的原文使用英文撰写。 为方便起见，TI 提供了译文；由于翻译过程中可能使用了自动化工具，TI 不保证译文的准确性。 为确认准确性，请务必访问 ti.com 参考最新的英文版本（控制文档）。

1 特性

  • 采样率：1MHz
  • 无延迟输出
  • 单极单端输入电压范围：
    0V 至 +VREF
  • SPI™- 兼容串行接口，此接口具有
    菊链式选项
  • 出色的交流和直流性能：
    • SNR：93dB，THD：–108dB
    • INL：±1.0LSB（典型值），±2.0 LSB（最大值）
    • DNL：±1.0LSB（最大值）、16 位 NMC
  • 宽工作电压范围：
    • AVDD：2.7V 至 3.6V
    • DVDD：1.65V 至 3.6V
      （不受 AVDD 影响）
    • REF：2.5V 至 5V（不受 AVDD 影响）
    • 工作温度：-40°C 至 +85°C
  • 低功率耗散：
    • 1MSPS 时为 5.5mW
    • 100kSPS 时为 0.55mW
    • 10kSPS 时为 55µW
  • 关断电流 (AVDD)：50nA
  • 满标度步进趋稳至 16 位：290ns
  • 封装：VSSOP-10 和 VSON-10

2 应用

  • 自动测试设备 (ATE)
  • 仪器和流程控制
  • 精密医疗设备
  • 低功耗电池供电的仪器

3 说明

ADS8860 是一款 16 位、1MSPS 单端输入模数转换器 (ADC)。此器件以 2.5V 至 5V 的外部基准运行，从而在无需额外的信号调节情况下提供宽信号范围。此基准电压设置独立于，并且可超过，模拟电源电压 (AVDD)。

该器件提供一个兼容的 SPI 串口。该串口也支持菊花链操作以实现多个器件级联。一个可选的繁忙指示器位可轻松实现与数字主机的同步。

此器件支持 -0.1V 至 VREF + 0.1V 范围的单极单端模拟输入。

器件运行针对极低功耗运行进行了优化。功耗直接与速度成比例。此特性使得 ADS8860 非常适合较低速度的 应用。

器件信息(1)

器件型号 封装 封装尺寸（标称值）
ADS8860 VSSOP (10) 3.00mm × 3.00mm
VSON (10) 3.00mm × 3.00mm
  1. 如需了解所有可用封装，请见数据表末尾的可订购产品附录。

Device Images

ADC 电源无需独立的 LDO

ADS8860 fbd_8860.gif

4 修订历史记录

Changes from A Revision (December 2013) to B Revision

  • Added 添加了器件信息 表、ESD 额定值 表、建议运行条件 表、参数测量信息 部分、特性 说明部分、器件功能模式 部分、应用和实施 部分、电源相关建议 部分、布局 部分、器件和文档支持 部分以及机械、封装和可订购信息 部分Go
  • Changed 通篇将模拟输入从伪差分更改为单端Go
  • Changed 在特性 部分中将 DVDD 值从 2.7V 至 3.6V 更改为 1.65V 至 3.6VGo
  • Changed 通篇将 MSOP 更改为 VSSOP Go
  • Changed title of Device Comparison Table from Family InformationGo
  • Changed footnotes of Family Information tableGo
  • Changed LSB footnote in Electrical Characteristics table to include how to convert LSB to ppm Go
  • Added more information about validity of data on SCLK edges in all interface modesGo
  • Changed diagrams and text for better explanation of the daisy-chain feature in the Daisy-Chain Mode sectionGo
  • Changed Equation 1 and Equation 2Go
  • Changed Charge-Kickback Filter section title and functionality description Go

Changes from * Revision (May 2013) to A Revision

  • Changed 更改了交流和直流性能 特性 项目中的子项目Go
  • Changed 更改了满标度步进趋稳 特性 项目Go
  • Deleted 删除了最后两个 应用 项目Go
  • Changed 说明 部分Go
  • Changed 首页图Go
  • Added Family Information, Absolute Maximum Ratings, and Thermal Information tablesGo
  • Added Pin Configurations sectionGo
  • Added Electrical Characteristics tableGo
  • Added Timing Characteristics sectionGo
  • Added Typical Characteristics sectionGo

5 Device Comparison Table

THROUGHPUT 18-BIT, TRUE-DIFFERENTIAL 16-BIT, SINGLE-ENDED 16-BIT, TRUE-DIFFERENTIAL
100 kSPS ADS8887 ADS8866 ADS8867
250 kSPS — ADS8339(1) —
400 kSPS ADS8885 ADS8864 ADS8865
500 kSPS — ADS8319(1) ADS8318(1)(2)
680 kSPS ADS8883 ADS8862 ADS8863
1 MSPS ADS8881 ADS8860 ADS8861
(1) Pin-to-pin compatible device with AVDD = 5 V.
(2) Supports standard for fully-differential input.

6 Pin Configuration and Functions

DGS Package
10-Pin VSSOP
Top View
DRC Package
10-Pin VSON
Top View

Pin Functions

PIN TYPE DESCRIPTION
NAME NO.
AINN 4 Analog input Inverting analog signal input
AINP 3 Analog input Noninverting analog signal input
AVDD 2 Analog Analog power supply. This pin must be decoupled to GND with a 1-µF capacitor.
CONVST 6 Digital input Convert input. This pin also functions as the CS input in 3-wire interface mode; see the Description and Timing Requirements sections for more details.
DIN 9 Digital input Serial data input. The DIN level at the start of a conversion selects the mode of operation (such as CS or daisy-chain mode). This pin also serves as the CS input in 4-wire interface mode; see the Description and Timing Requirements sections for more details.
DOUT 7 Digital output Serial data output
DVDD 10 Power supply Digital interface power supply. This pin must be decoupled to GND with a 1-µF capacitor.
GND 5 Analog, digital Device ground. Note that this pin is a common ground pin for both the analog power supply (AVDD) and digital I/O supply (DVDD). The reference return line is also internally connected to this pin.
REF 1 Analog Positive reference input. This pin must be decoupled with a 10-µF or larger capacitor.
SCLK 8 Digital input Clock input for serial interface. Data output (on DOUT) are synchronized with this clock.
Thermal pad — Exposed thermal pad (only for the DRC package option). Texas Instruments recommends connecting the thermal pad to the printed circuit board (PCB) ground.

 
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