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AD7817SR-REEL PDF预览

AD7817SR-REEL

更新时间: 2024-01-31 23:20:15
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
20页 1587K
描述
Dual, Low Power CMOS, Analog Front End with DSP Microcomputer

AD7817SR-REEL 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Active零件包装代码:SOIC
包装说明:SOP,针数:16
Reach Compliance Code:unknown风险等级:5.64
最大模拟输入电压:2.625 V最小模拟输入电压:
最长转换时间:9 µs转换器类型:ADC, SUCCESSIVE APPROXIMATION
JESD-30 代码:R-PDSO-G16JESD-609代码:e3
长度:9.9 mm最大线性误差 (EL):0.0977%
湿度敏感等级:1模拟输入通道数量:4
位数:10功能数量:1
端子数量:16最高工作温度:125 °C
最低工作温度:-55 °C输出位码:BINARY
输出格式:SERIAL封装主体材料:PLASTIC/EPOXY
封装代码:SOP封装形状:RECTANGULAR
封装形式:SMALL OUTLINE峰值回流温度(摄氏度):260
采样速率:0.1 MHz采样并保持/跟踪并保持:TRACK
座面最大高度:1.75 mm标称供电电压:3 V
表面贴装:YES温度等级:MILITARY
端子面层:MATTE TIN端子形式:GULL WING
端子节距:1.27 mm端子位置:DUAL
处于峰值回流温度下的最长时间:40宽度:3.9 mm
Base Number Matches:1

AD7817SR-REEL 数据手册

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Dual, Low Power CMOS, Analog Front End  
with DSP Microcomputer  
Data Sheet  
AD7817/AD7818  
FEATURES  
FUNCTIONAL BLOCK DIAGRAMS  
REF  
V
DD  
IN  
10-bit ADC with 9 µs conversion time  
1 AD7818 and 4 AD7817 single-ended analog input channels  
On-chip temperature sensor  
Resolution of 0.25°C  
2°C error from −40°C to +85°C  
−55°C to +125°C operating range  
Wide operating supply range: 2.7 V to 5.5 V  
Inherent track-and-hold functionality  
On-chip reference (2.5 V 1%)  
AD7817  
OVERTEMP  
REG  
B
A > B  
A
OTI  
TEMP  
SENSOR  
CHARGE  
REDISTRIBUTION  
DAC  
REF  
2.5V  
DATA  
OUT  
D
OUT  
V
V
V
V
IN1  
IN2  
IN3  
IN4  
MUX  
CONTROL  
LOGIC  
REG  
CONTROL  
SAMPLING  
CAPACITOR  
D
IN  
SCLK  
RD/WR  
CS  
V
CLOCK  
BALANCE  
Overtemperature indicator  
AGND  
DGND  
BUSY  
CONVST  
Automatic power-down at the end of a conversion  
Low power operation  
Figure 1. AD7817 Functional Block Diagram  
4 µW at a throughput rate of 10 SPS  
40 µW at a throughput rate of 1 kSPS  
400 µW at a throughput rate of 10 kSPS  
Flexible serial interface  
V
DD  
AD7818  
OVERTEMP  
REG  
B
A > B  
A
OTI  
TEMP  
SENSOR  
REF  
2.5V  
CHARGE  
REDISTRIBUTION  
DAC  
DATA  
OUT  
APPLICATIONS  
D
V
IN/OUT  
Data acquisition systems with ambient temperature  
monitoring  
IN1  
MUX  
CONTROL  
LOGIC  
SAMPLING  
CAPACITOR  
CONTROL  
REG  
SCLK  
Industrial process control  
Automotive  
RD/WR  
V
CLOCK  
GENERATOR  
BALANCE  
Battery charging applications  
AGND  
CONVST  
Figure 2. AD7818 Functional Block Diagram  
GENERAL DESCRIPTION  
The AD7817/AD7818 are 10-bit, single- and 4-channel analog-to-  
digital converters (ADCs) with an on-chip temperature sensor that  
can operate from a single 2.7 V to 5.5 V power supply. Each part  
contains a 9 µs successive approximation converter based around  
a capacitor digital-to-analog converter (DAC), an on-chip  
temperature sensor with an accuracy of 2°C, an on-chip clock  
oscillator, inherent track-and-hold functionality, and an on-chip  
reference (2.5 V).  
information, refer to the AD7817 Serial Interface section and  
the AD7818 Serial Interface Mode section.  
The AD7817 is available in a narrow body, 0.15 inch, 16-lead  
SOIC and a 16-lead TSSOP, and the AD7818 comes in an 8-lead  
SOIC and an 8-lead MSOP.  
PRODUCT HIGHLIGHTS  
1. The devices have an on-chip temperature sensor that allows  
an accurate measurement of the ambient temperature to be  
made. The measurable temperature range is −55°C to +125°C.  
2. An overtemperature indicator is implemented by carrying out a  
digital comparison of the ADC code for Channel 0 (temperature  
sensor) with the contents of the on-chip overtemperature  
register. The overtemperature indicator pin goes logic low  
when a predetermined temperature is exceeded.  
The on-chip temperature sensor of the AD7817/AD7818 can  
be accessed via Channel 0. When Channel 0 is selected and a  
conversion is initiated, the resulting ADC code at the end of the  
conversion gives a measurement of the ambient temperature with a  
resolution of 0.25°C. See the Temperature Measurement section.  
The AD7817/AD7818 have a flexible serial interface that allows  
easy interfacing to most microcontrollers. The interface is  
compatible with the Intel 8051, Motorola SPI and QSPI, and  
National Semiconductors MICROWIRE protocols. For more  
3. The automatic power-down feature enables the AD7817 and  
AD7818 to achieve superior power performance at slower  
throughput rates, that is, 40 µW at 1 kSPS throughput rate.  
Rev. D  
Document Feedback  
Information furnished by Analog Devices is believed to be accurate and reliable. However, no  
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other  
rights of third parties that may result fromits use. Specifications subject to change without notice. No  
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.  
Trademarks andregisteredtrademarks are the property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Technical Support  
©2012 Analog Devices, Inc. All rights reserved.  
www.analog.com  
 
 
 
 
 

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