參數(shù)資料
型號: AD7686CCPZRL7
廠商: Analog Devices Inc
文件頁數(shù): 5/28頁
文件大?。?/td> 0K
描述: IC ADC 16BIT SAR 500KSPS 10LFCSP
標(biāo)準(zhǔn)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(biāo)準(zhǔn)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 13 of 28
Transfer Functions
The ideal transfer characteristic for the AD7686 is shown in
000...000
000...001
000...010
111...101
111...110
111...111
ADC
CO
DE
(
S
T
RA
IG
H
T
BI
N
A
R
Y)
ANALOG INPUT
+FSR – 1.5 LSB
+FSR – 1 LSB
–FSR + 1 LSB
–FSR
–FSR + 0.5 LSB
02
96
9-
0
25
Figure 25. ADC Ideal Transfer Function
Table 7. Output Codes and Ideal Input Voltages
Description
Analog Input
VREF = 5 V
Digital Output Code
Hexadecimal
FSR – 1 LSB
4.999924 V
FFFF1
Midscale + 1 LSB
2.500076 V
8001
Midscale
2.5 V
8000
Midscale – 1 LSB
2.499924 V
7FFF
–FSR + 1 LSB
76.3 μV
0001
–FSR
0 V
00002
TYPICAL CONNECTION DIAGRAM
Figure 26 shows an example of the recommended connection
diagram for the AD7686 when multiple supplies are available.
1 This is also the code for an overranged analog input (VIN+ VIN above VREF V
).
GND
2 This is also the code for an underranged analog input (V
V
below V
).
IN+
IN
GND
AD7686
REF
GND
VDD
IN–
IN+
VIO
SDI
SCK
SDO
CNV
3- OR 4-WIRE INTERFACE5
100nF
5V
10F2
≥7V
≤–2V
1.8V TO VDD
REF1
0 TO VREF
33
2.7nF
3
4
02
96
9-
0
26
1SEE THE VOLTAGE REFERENCE INPUT SECTION FOR REFERENCE SELECTION.
2CREF IS USUALLY A 10F CERAMIC CAPACITOR (X5R).
3SEE DRIVER AMPLIFIER CHOICE SECTION.
4OPTIONAL FILTER. SEE ANALOG INPUT SECTION.
5SEE DIGITAL INTERFACE SECTION FOR MOST CONVENIENT INTERFACE MODE.
Figure 26. Typical Application Diagram with Multiple Supplies
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