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AD7291 PDF预览

AD7291

更新时间: 2024-01-11 21:45:42
品牌 Logo 应用领域
亚德诺 - ADI 传感器温度传感器
页数 文件大小 规格书
21页 430K
描述
8-Channel, I2C, 12-Bit SAR ADC with Temperature Sensor

AD7291 技术参数

是否无铅: 含铅是否Rohs认证: 符合
生命周期:Active包装说明:HVQCCN, LCC20,.16SQ,20
针数:20Reach Compliance Code:compliant
风险等级:2.29最大模拟输入电压:2.5 V
最小模拟输入电压:最长转换时间:3.2 µs
转换器类型:ADC, SUCCESSIVE APPROXIMATIONJESD-30 代码:S-XQCC-N20
长度:4 mm最大线性误差 (EL):0.024%
湿度敏感等级:3模拟输入通道数量:8
位数:12功能数量:1
端子数量:20最高工作温度:125 °C
最低工作温度:-55 °C输出位码:BINARY, 2'S COMPLEMENT BINARY
输出格式:SERIAL封装主体材料:UNSPECIFIED
封装代码:HVQCCN封装等效代码:LCC20,.16SQ,20
封装形状:SQUARE封装形式:CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
采样速率:0.02222 MHz采样并保持/跟踪并保持:TRACK
座面最大高度:0.8 mm最大压摆率:3.5 mA
标称供电电压:3 V表面贴装:YES
温度等级:AUTOMOTIVE端子形式:NO LEAD
端子节距:0.5 mm端子位置:QUAD
宽度:4 mmBase Number Matches:1

AD7291 数据手册

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8-Channel, I2C, 12-Bit SAR ADC  
with Temperature Sensor  
AD7291  
Preliminary Technical Data  
Functional Block Diagram  
FEATURES  
12 bit SAR ADC  
8 single-ended inputs  
Channel sequencer functionality  
Analog Input Range 0 to 2.5V  
12-bit temperature-to-digital converter  
Temperature sensor accuracy of 2°C typical  
Temperature range: −40°C to +125°C  
Specified for VDD of 2.8 V to 3.6V  
Logic Voltage VDRIVE = 1.65V to 3.6V  
Power-down current : <10 µA  
Internal 2.5V Reference  
I2C-compatible serial interface supports  
standard & fast modes  
20-lead LFCSP  
Figure 1.  
GENERAL DESCRIPTION  
PRODUCT HIGHLIGHTS  
The AD7291 is a 12-bit, high speed, low power, 8-channel,  
successive approximation ADC with an internal temperature  
sensor. The part operates from a single 3.3V power supply and  
features an I2C®-compatible interface. The track-and-hold  
amplifier which can handle input frequencies of up to 70MHz,  
and a multiplexer allows samples from eight channels.  
1. Ideally suited to monitoring system variables in a variety of  
systems including telecommunications, process and  
industrial control  
2. I2C-compatible serial interface. Standard and fast modes.  
3. Eight Single-Ended Inputs with a Channel Sequencer.  
A consecutive sequence of channels can be selected on  
which the ADC cycles and converts.  
Each AD7291 provides a 2-wire serial interface compatible with  
I2C interfaces. The AD7291 offers a programmable sequencer,  
which enables the selection of a pre-programmable sequence of  
channels for conversion. The device has an on-chip 2.5 V  
reference that can be disabled to allow the use of an external  
reference.  
4. Integrated temperature sensor with 0.25°C resolution.  
The AD7291 includes a high accuracy band-gap temperature  
sensor, which is monitored and digitized by the12-bit ADC to  
give a resolution of 0.25°C. The AD7291 uses advanced design  
techniques to achieve very low power dissipation at high  
throughput rates. The part also offers flexible  
Table 1. AD7298 and Related Products  
Device  
Resolution  
Interface Features  
AD7298 12-Bit  
AD7291 12-Bit  
SPI  
I2C  
8 Channel ADC & Temp Sensor  
8 Channel ADC & Temp Sensor  
power/throughput rate management options and is offered in a  
20 lead LFCSP package  
Rev. PrC  
Information furnished by Analog Devices is believed to be accurate and reliable. However, no  
responsibility is assumed byAnalog Devices for its use, nor for any infringements of patents or other  
rightsof 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  
Fax: 781.461.3113  
www.analog.com  
©2009 Analog Devices, Inc. All rights reserved.  

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