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AD7170BCPZ-500RL7 PDF预览

AD7170BCPZ-500RL7

更新时间: 2024-11-04 06:36:11
品牌 Logo 应用领域
亚德诺 - ADI 转换器模数转换器光电二极管
页数 文件大小 规格书
16页 266K
描述
12-Bit Low Power Sigma-Delta ADC

AD7170BCPZ-500RL7 数据手册

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12-Bit Low Power Sigma-Delta ADC  
AD7170  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
Output data rate: 125 Hz  
GND  
V
REFIN(+) REFIN(–)  
DD  
Pin-programmable power-down and reset  
Status function  
Internal clock oscillator  
AIN(+)  
AIN(–)  
DOUT/RDY  
SCLK  
12-BIT Σ-Δ  
ADC  
Current: 135 μA  
PDRST  
Power supply: 2.7 V to 5.25 V  
–40°C to +105°C temperature range  
Package: 10-lead 3 mm x 3 mm LFCSP  
INTERNAL  
CLOCK  
AD7170  
Figure 1.  
INTERFACE  
Table 1.  
2-wire serial (read-only device)  
SPI compatible  
Schmitt trigger on SCLK  
P-P  
VREF = VDD  
5 V  
RMS Noise P-P Noise Resolution ENOB  
11.5 μV  
6.9 μV  
76 μV  
45 μV  
12 bits  
12 bits  
12 bits  
12 bits  
3 V  
APPLICATIONS  
Pressure measurement  
Industrial process control  
Portable instrumentation  
GENERAL DESCRIPTION  
The output data rate of the AD7170 is 125 Hz, whereas the  
settling time is 24 ms. The AD7170 has one differential input  
and a gain of 1. This is useful in applications where the user  
needs to use an external amplifier to implement system-specific  
filtering or gain requirements.  
The AD7170 is a very low power 12-bit analog-to-digital converter  
(ADC). It contains a precision 12-bit sigma-delta (Σ-Δ) ADC  
and an on-chip oscillator. Consuming only 135 μA, the AD7170  
is particularly suitable for portable or battery operated products  
where very low power is a requirement. The AD7170 also has a  
power-down mode in which the device consumes 5 μA, thus  
increasing the battery life of the product.  
The AD7170 operates with a power supply from 2.7 V to 5.25 V.  
It is available in a 10-lead LFCSP package.  
For ease-of-use, all the features of the AD7170 are controlled by  
dedicated pins. Each time a data read occurs, eight status bits  
are appended to the 12-bit conversion. These status bits contain  
a pattern sequence that can be used to confirm the validity of  
the serial transfer.  
The AD7171 is a 16-bit version of the AD7170. It has the same  
feature set as the AD7170 and is pin-for-pin compatible.  
Rev. 0  
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 from its 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 and registeredtrademarks arethe 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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