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AD7262 Datasheet(PDF) 18 Page - Analog Devices

Part # AD7262
Description  1 MSPS, 12-Bit, Simultaneous Sampling SAR ADC with PGA and Four Comparators
PDF  32 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7262 Datasheet(HTML) 18 Page - Analog Devices

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AD7262
Rev. 0 | Page 18 of 32
10µF1
100nF
VDRIVE
VDRIVE
3V OR 5V
SUPPLY
MICROPROCESSOR/
MICROCONTROLLER
10µF1
COMPARATOR
SUPPLY 3V TO 5V2
100nF
100nF
100nF
ANALOG
SUPPLY
+5V
10µF1 100nF
100nF
100nF
100nF
100nF
VDRIVE
G0
G1
G2
G3
SCLK
DOUTA
DOUTB
REFSEL
CAL
PD0/DIN
PD1
PD2
13 14 15 16
45 46 47 48
25 26 29 30
22
23
36
24
32
35
34
37
38
39
40
27
31
21
3.125V
VA– AND VA+
CONNECT
DIRECTLY
TO SENSOR
OUTPUTS
THIS REFERENCE SIGNAL
MUST BE BUFFERED
BEFORE IT CAN BE
USED ELSEWHERE IN
THE CIRCUIT
2.500V
1.875V
GAIN 2
3.125V
2.500V
1.875V
GAIN 2
3.125V
2.500V
1.875V
GAIN 2
3.125V
2.500V
1.875V
GAIN 2
VB– AND VB+
CONNECT
DIRECTLY
TO SENSOR
OUTPUTS
1µF
1µF
17 44 5 6 8 19 42 28 2 7 11 20 41 12 1 33
VB–
VB+
VREFB
VREFA
VA+
VA–
10
9
18
43
4
3
AD7262
FAST PROPAGATION DELAY
COMPARATOR INPUTS
1THESE CAPACITORS ARE PLACED AT THE SUPPLY SOURCE AND MAY NOT BE REQUIRED IN ALL SYSTEMS.
2THIS SUPPLY CAN BE CONNECTED TO THE ANALOG 5V SUPPLY IF REQUIRED.
LOW POWER
COMPARATOR INPUTS
SERIAL
INTERFACE
CS
Figure 26. Typical Connection Diagram for the AD7262/AD7262-5 in Control Register Mode (All Gain Pins Tied to Ground) Configured for a PGA Gain of 2



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