參數(shù)資料
型號(hào): AD7747ARUZ-REEL7
廠商: Analog Devices Inc
文件頁數(shù): 18/28頁
文件大?。?/td> 0K
描述: IC CONV CAP TO DIG 24BIT 16TSSOP
標(biāo)準(zhǔn)包裝: 1,000
類型: 電容數(shù)字轉(zhuǎn)換器
分辨率(位): 24 b
數(shù)據(jù)接口: 串行
電壓電源: 單電源
電源電壓: 2.7 V ~ 5.25 V
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 16-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 16-TSSOP
包裝: 帶卷 (TR)
配用: EVAL-AD7747EBZ-ND - BOARD EVAL FOR AD7747
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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