ZHCSID7
June 2018
ADS8688AT
PRODUCTION DATA.
1
特性
2
应用
3
说明
4
修订历史记录
5
Pin Configuration and Functions
Pin Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Timing Requirements: Serial Interface
6.7
Switching Characteristics: Serial Interface
6.8
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Analog Inputs
7.3.2
Analog Input Impedance
7.3.3
Input Overvoltage Protection Circuit
7.3.4
Programmable Gain Amplifier (PGA)
7.3.5
Second-Order, Low-Pass Filter (LPF)
7.3.6
ADC Driver
7.3.7
Multiplexer (MUX)
7.3.8
Reference
7.3.8.1
Internal Reference
7.3.8.2
External Reference
7.3.9
Auxiliary Channel
7.3.9.1
Input Driver for the AUX Channel
7.3.10
ADC Transfer Function
7.3.11
Alarm Feature
7.4
Device Functional Modes
7.4.1
Device Interface
7.4.1.1
Digital Pin Description
7.4.1.1.1
CS (Input)
7.4.1.1.2
SCLK (Input)
7.4.1.1.3
SDI (Input)
7.4.1.1.4
SDO (Output)
7.4.1.1.5
DAISY (Input)
7.4.1.1.6
RST/PD (Input)
7.4.1.2
Data Acquisition Example
7.4.1.3
Host-to-Device Connection Topologies
7.4.1.3.1
Daisy-Chain Topology
7.4.1.3.2
Star Topology
7.4.2
Device Modes
7.4.2.1
Continued Operation in the Selected Mode (NO_OP)
7.4.2.2
Frame Abort Condition (FRAME_ABORT)
7.4.2.3
STANDBY Mode (STDBY)
7.4.2.4
Power-Down Mode (PWR_DN)
7.4.2.5
Auto Channel Enable With Reset (AUTO_RST)
7.4.2.6
Manual Channel n Select (MAN_Ch_n)
7.4.2.7
Channel Sequencing Modes
7.4.2.8
Reset Program Registers (RST)
7.5
Register Maps
7.5.1
Command Register Description
7.5.2
Program Register Description
7.5.2.1
Program Register Read/Write Operation
7.5.2.2
Program Register Map
7.5.2.3
Program Register Descriptions
7.5.2.3.1
Auto-Scan Sequencing Control Registers
7.5.2.3.1.1
Auto-Scan Sequence Enable Register (address = 01h)
Table 11.
AUTO_SEQ_EN Field Descriptions
7.5.2.3.1.2
Channel Power Down Register (address = 02h)
Table 12.
Channel Power Down Register Field Descriptions
7.5.2.3.2
Device Features Selection Control Register (address = 03h)
Table 13.
Feature Select Register Field Descriptions
7.5.2.3.3
Range Select Registers (addresses 05h-0Ch)
Table 16.
Channel n Input Range Registers Field Descriptions
7.5.2.3.4
Alarm Flag Registers (Read-Only)
7.5.2.3.4.1
ALARM Overview Tripped-Flag Register (address = 10h)
Table 17.
ALARM Overview Tripped-Flag Register Field Descriptions
7.5.2.3.4.2
Alarm Flag Registers: Tripped and Active (address = 11h to 14h)
Table 18.
ALARM Ch0-3 Tripped-Flag Register Field Descriptions
Table 19.
ALARM Ch0-3 Active-Flag Register Field Descriptions
Table 20.
ALARM Ch4-7 Tripped-Flag Register Field Descriptions
Table 21.
ALARM Ch4-7 Active-Flag Register Field Descriptions
7.5.2.3.5
Alarm Threshold Setting Registers
Table 22.
Channel n Hysteresis Register Field Descriptions (n = 0 to 7)
Table 23.
Channel n High Threshold MSB Register Field Descriptions (n = 0 to 7)
Table 24.
Channel n High Threshold LSB Register Field Descriptions (n = 0 to 7)
Table 25.
Channel n Low Threshold MSB Register Field Descriptions (n = 0 to 7)
Table 26.
Channel n Low Threshold MSB Register Field Descriptions (n = 0 to 7)
7.5.2.3.6
Command Read-Back Register (address = 3Fh)
Table 27.
Command Read-Back Register Field Descriptions
8
Application and Implementation
8.1
Application Information
8.2
Typical Applications
8.2.1
Phase-Compensated, 8-Channel, Multiplexed Data Acquisition System for Power Automation
8.2.1.1
Design Requirements
8.2.1.2
Detailed Design Procedure
8.2.1.3
Application Curve
8.2.2
16-Bit, 8-Channel, Integrated Analog Input Module for Programmable Logic Controllers (PLCs)
8.2.2.1
Design Requirements
8.2.2.2
Detailed Design Procedure
8.2.2.3
Application Curve
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
11
器件和文档支持
11.1
文档支持
11.1.1
相关文档
11.2
接收文档更新通知
11.3
社区资源
11.4
商标
11.5
静电放电警告
11.6
术语表
12
机械、封装和可订购信息
封装选项
机械数据 (封装 | 引脚)
DBT|38
MPDS368A
散热焊盘机械数据 (封装 | 引脚)
订购信息
zhcsid7_oa
11.1.1
相关文档
请参阅如下相关文档:
ISO154x 低功耗双向 I
2
C 隔离器
ISO71xxCC 4242V
PK
小封装低功耗三通道和四通道数字隔离器
LM5017 100V、600mA 恒定开通时间同步降压稳压器
具有关断功能的 20MHz、0.9pA、RRIO、CMOS OPA320 高精度、低噪声运算放大器
《REF50xx 低噪声、极低漂移、高精度电压基准》
具有中断输出、复位和配置寄存器的 TCA6408A 低电压 8 位 I
2
C 和 SMBus 低功耗 I/O 扩展器
具有使能功能的 150mA、30V、1μA IQ TPS709 稳压器
AN-2029 操作和处理相关建议
应用报告
适用于可编程逻辑控制器 (PLC) 的 16 位 8 通道、软件可配置模拟输入模块
用于电力自动化的相位补偿 8 通道多路复用数据采集系统参考设计