參數(shù)資料
型號(hào): AD7693
廠商: Analog Devices, Inc.
英文描述: 16-Bit, +/-0.65 LSB INL, 500 kSPS PulSAR Differential ADC in MSOP/QFN
中文描述: 16位/ -0.65 LSB INL和500 kSPS的PulSAR系列差分ADC,采用MSOP / QFN封裝
文件頁(yè)數(shù): 13/24頁(yè)
文件大小: 449K
代理商: AD7693
Preliminary Technical Data
AD7693
Transfer Functions
The ideal transfer characteristic for the AD7693 is shown in
Figure 25 and Table 7.
Rev. PrB | Page 13 of 24
TYPICAL CONNECTION DIAGRAM
Figure 26 shows an example of the recommended connection
diagram for the AD7693 when multiple supplies are available.
100...000
100...001
100...010
011...101
011...110
011...111
A
ANALOG INPUT
+FSR – 1.5LSB
+FSR – 1LSB
–FSR + 1LSB
–FSR
–FSR + 0.5LSB
-
Figure 25. ADC Ideal Transfer Function
Table 7. Output Codes and Ideal Input Voltages
Analog Input
V
REF
= 5 V
Description
FSR 1 LSB
+4.999847 V
Midscale + 1 LSB
+152.6 μV
Midscale
0 V
Midscale 1 LSB
152.6 μV
FSR + 1 LSB
4.999847 V
FSR
5 V
Digital Output
Code (Hex)
0x7FFF
1
0x0001
0x0000
0xFFFF
0x8001
0x8000
2
1
This is also the code for an overranged analog input (V
IN+
V
IN
above V
REF
V
GND
).
2
This is also the code for an underranged analog input (V
IN+
V
IN
below V
GND
).
AD7693
REF
GND
VDD
IN–
IN+
VIO
SDI
SCK
SDO
CNV
3- OR 4-WIRE INTERFACE
5
100nF
100nF
5V
10μF
2
V+
V+
V–
1.8V TO VDD
REF
1
0 TO V
REF
2.7nF
4
V+
V–
V
REF
TO 0
2.7nF
ADA4841-2
3
ADA4841-2
3
4
1
SEE REFERENCE SECTION FOR REFERENCE SELECTION.
2
C
IS USUALLY A 10μF CERAMIC CAPACITOR (X5R).
3
SEE TABLE 8 FOR ADDITIONAL RECOMMENDED AMPLIFIERS.
4
OPTIONAL FILTER. SEE ANALOG INPUT SECTION.
5
SEE THE DIGITAL INTERFACE SECTION FOR MOST CONVENIENT INTERFACE MODE.
-
15
Ω
15
Ω
Figure 26. Typical Application Diagram with Multiple Supplies
相關(guān)PDF資料
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