参数资料
型号: AD7747ARUZ
厂商: Analog Devices Inc
文件页数: 18/28页
文件大小: 0K
描述: IC CONV 24BIT CAP-DGTL 16-TSSOP
标准包装: 96
类型: 电容数字转换器
分辨率(位): 24 b
数据接口: 串行
电压电源: 单电源
电源电压: 2.7 V ~ 5.25 V
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 16-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 16-TSSOP
包装: 管件
产品目录页面: 781 (CN2011-ZH PDF)
配用: EVAL-AD7747EBZ-ND - BOARD EVAL FOR AD7747
其它名称: Q23139198
AD7747
Rev. 0 | Page 25 of 28
VOLTAGE INPUT
DIGITAL
FILTER
24-BIT Σ-Δ
MODULATOR
CLOCK
GENERATOR
ANALOG TO DIGITAL CONVERTER
(ADC)
05
46
9-
0
28
VOLTAGE
REFERENCE
DATA
VIN(–)
VIN(+)
REFIN(–)
REFIN(+)
RREF
RTD
RT
VDD
GND
Figure 38. Resistive Temperature Sensor Connected to the Voltage Input
The AD7747 Σ-Δ core can work as a high resolution (up to
21 ENOB) classic ADC with a fully differential voltage input.
The ADC can be used either with the on-chip high precision,
low drift, 1.17 V voltage reference, or with an external reference
connected to the fully differential reference input pins.
The voltage and reference inputs are continuously sampled by
a Σ-Δ modulator during the conversion. Therefore, the input
source impedance should be kept low. See the application
example in Figure 38.
VDD MONITOR
Along with converting external voltages, the AD7747 Σ-Δ ADC
can be used for monitoring the VDD voltage. The voltage from
the VDD pin is internally attenuated by 6.
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