參數(shù)資料
型號: AD7686CCPZRL7
廠商: Analog Devices Inc
文件頁數(shù): 17/28頁
文件大小: 0K
描述: IC ADC 16BIT SAR 500KSPS 10LFCSP
標準包裝: 1
系列: PulSAR®
位數(shù): 16
采樣率(每秒): 500k
數(shù)據(jù)接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 21.5mW
電壓電源: 模擬和數(shù)字
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 10-WFDFN 裸露焊盤,CSP
供應(yīng)商設(shè)備封裝: 10-LFCSP-WD(3x3)
包裝: 標準包裝
輸入數(shù)目和類型: 1 個偽差分,單極
產(chǎn)品目錄頁面: 778 (CN2011-ZH PDF)
其它名稱: AD7686CCPZRL7DKR
AD7686
Rev. B | Page 24 of 28
TRUE 16-BIT ISOLATED APPLICATION EXAMPLE
In applications where high accuracy and isolation are required,
such as power monitoring, motor control, and some medical
equipment, the circuit shown in Figure 47, using the AD7686
and the ADuM1402C digital isolator, provides a compact and
high performance solution.
Multiple AD7686 devices are daisy-chained to reduce the
number of signals to isolate. Note that the SCKOUT, which is a
readback of the AD7686 clock, has a very short skew with the
DATA signal.
This skew is the channel-to-channel matching propagation
delay of the digital isolator (tPSKCD). This allows running the
serial interface at the maximum speed of the digital isolator
(45 Mbps for the ADuM1402C), which would have been
otherwise limited by the cascade of the propagation delays of
the digital isolator. For instance, four AD7686 devices running
at 330 kSPS can be chained together.
The complete analog chain runs on a single 5 V supply using
the ADR391 low dropout reference voltage and the rail-to-rail
CMOS AD8618 amplifier while offering true bipolar input range.
IN– GND
REF VDD VIO
SDO
VDD1, VE1
GND1
VDD2, VE2
GND2
SCK
CNV
SDI
AD7686
1/4 AD8618
5V
1k
2V REF
±10V INPUT
5V REF
5V
10F
100nF
IN– GND
REF VDD VIO
SDO
SCK
CNV
SDI
AD7686
1/4 AD8618
5V
1k
2V REF
±10V INPUT
5V REF
5V
10F
100nF
IN– GND
REF VDD VIO
SDO
SCK
CNV
SDI
AD7686
1/4 AD8618
5V
1k
2V REF
±10V INPUT
5V REF
5V
10F
100nF
IN–
IN+
GND
REF VDD VIO
SDO
SCK
CNV
SDI
AD7686
1/4 AD8618
5V
1k
4k
2V REF
5V
1k
100nF
10
μF
5V REF
2V REF
4k
±10V INPUT
5V REF
5V
10F
100nF
VIA
VIB
VOC
VOD
VOA
VOB
VIC
VID
2.7V TO 5V
100nF
DATA
SCKOUT
SCKIN
CONVERT
ADuM1402C
OUT
GND
IN
ADR391
02
96
9-
0
48
Figure 47. A True 16-Bit Isolated Simultaneous Sampling Acquisition System
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