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AD5122 Datasheet(PDF) 22 Page - Analog Devices

Part No. AD5122
Description  Dual Channel, 128-/256-Position, SPI, Nonvolatile Digital Potentiometer
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD5122 Datasheet(HTML) 22 Page - Analog Devices

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AD5122/AD5142
Data Sheet
Rev. C | Page 22 of 32
Table 10. Reduced Commands Operation Truth Table
Command
Number
Control
Bits[DB15:DB12]
Address
Bits[DB11:DB8]1
Data Bits[DB7:DB0]1
C3
C2
C1
C0
A3
A2
A1
A0
D7
D6
D5
D4
D3
D2
D1
D0
Operation
0
0
0
0
0
X
X
X
X
X
X
X
X
X
X
X
X
NOP: do nothing.
1
0
0
0
1
0
0
0
A0
D7
D6
D5
D4
D3
D2
D1
D0
Write contents of serial register
data to RDAC
2
0
0
1
0
0
0
0
A0
D7
D6
D5
D4
D3
D2
D1
D0
Write contents of serial register
data to input register
3
0
0
1
1
X
0
A1
A0
X
X
X
X
X
X
D1
D0
Read back contents
D1
D0
Data
0
1
EEPROM
1
1
RDAC
9
0
1
1
1
0
0
0
A0
X
X
X
X
X
X
X
1
Copy RDAC register to EEPROM
10
0
1
1
1
0
0
0
A0
X
X
X
X
X
X
X
0
Copy EEPROM into RDAC
14
1
0
1
1
X
X
X
X
X
X
X
X
X
X
X
X
Software reset
15
1
1
0
0
A3
0
0
A0
X
X
X
X
X
X
X
D0
Software shutdown
D0
Condition
0
Normal mode
1
Shutdown mode
1X means don’t care.
Table 11. Reduced Address Bits Table
A3
A2
A1
A0
Channel
Stored Channel Memory
1
X1
X1
X1
All channels
Not applicable
0
0
0
0
RDAC1
RDAC1
0
0
0
1
RDAC2
Not applicable
0
0
1
0
Not applicable
RDAC2
1X means don’t care.


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