参数资料
型号: AD7171BCPZ-REEL7
厂商: Analog Devices Inc
文件页数: 1/16页
文件大小: 0K
描述: IC ADC 16BIT SER 125HZ 10LFCSP
标准包装: 1,500
位数: 16
采样率(每秒): 125
数据接口: 串行,SPI?
转换器数目: 1
电压电源: 单电源
工作温度: -40°C ~ 105°C
安装类型: 表面贴装
封装/外壳: 10-WFDFN 裸露焊盘,CSP
供应商设备封装: 10-LFCSP-WD(3x3)
包装: 带卷 (TR)
输入数目和类型: 1 个差分,双极
16-Bit Low Power Sigma-Delta ADC
Data Sheet
Rev. A
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rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
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Tel: 781.329.4700
2009–2013 Analog Devices, Inc. All rights reserved.
FEATURES
Output data rate: 125 Hz
Pin-programmable power-down and reset
Status function
Internal clock oscillator
Current: 135 A
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
INTERFACE
2-wire serial (read-only device)
SPI compatible
Schmitt trigger on SCLK
APPLICATIONS
Weigh scales
Pressure measurement
Industrial process control
Portable instrumentation
FUNCTIONAL BLOCK DIAGRAM
16-BIT Σ-Δ
ADC
AD7171
GND
INTERNAL
CLOCK
VDD
REFIN(+)
AIN(+)
AIN(–)
REFIN(–)
DOUT/RDY
SCLK
PDRST
08417-
001
Figure 1.
Table 1.
VREF = VDD
RMS Noise
P-P Noise
P-P
Resolution
ENOB
5 V
11.5 μV
76 μV
16 bits
3 V
6.9 μV
45 μV
16 bits
GENERAL DESCRIPTION
The AD7171 is a very low power 16-bit analog-to-digital converter
(ADC). It contains a precision 16-bit sigma-delta (Σ-Δ) ADC
and an on-chip oscillator. Consuming only 135 A, the AD7171
is particularly suitable for portable or battery operated products
where very low power is a requirement. The AD7171 also has a
power-down mode in which the device consumes 5 μA, thus
increasing the battery life of the product.
For ease-of-use, all the features of the AD7171 are controlled by
dedicated pins. Each time a data read occurs, eight status bits
are appended to the 16-bit conversion. These status bits contain
a pattern sequence that can be used to confirm the validity of
the serial transfer.
The output data rate of the AD7171 is 125 Hz, whereas the
settling time is 24 ms. The AD7171 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 AD7171 operates with a power supply from 2.7 V to 5.25 V.
It is available in a 10-lead LFCSP package.
The AD7170 is a 12-bit version of the AD7171. It has the same
feature set as the AD7171 and is pin-for-pin compatible.
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