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AD5122 Datasheet(PDF) 25 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) 25 Page - Analog Devices

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Data Sheet
AD5122/AD5142
Rev. C | Page 25 of 32
Table 16. Advance Command 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
A2
0
A0
D7
D6
D5
D4
D3
D2
D1
D0
Write contents of serial
register data to RDAC
2
0
0
1
0
0
A2
0
A0
D7
D6
D5
D4
D3
D2
D1
D0
Write contents of serial
register data to input
register
3
0
0
1
1
0
A2
A1
A0
X
X
X
X
X
X
D1
D0
Read back contents
D1
D0
Data
0
0
Input register
0
1
EEPROM
1
0
Control
register
1
1
RDAC
4
0
1
0
0
A3
A2
0
A0
X
X
X
X
X
X
X
1
Linear RDAC increment
5
0
1
0
0
A3
A2
0
A0
X
X
X
X
X
X
X
0
Linear RDAC decrement
6
0
1
0
1
A3
A2
0
A0
X
X
X
X
X
X
X
1
+6 dB RDAC increment
7
0
1
0
1
A3
A2
0
A0
X
X
X
X
X
X
X
0
−6 dB RDAC decrement
8
0
1
1
0
A3
A2
0
A0
X
X
X
X
X
X
X
X
Copy input register to RDAC
(software LRDAC)
9
0
1
1
1
0
A2
0
A0
X
X
X
X
X
X
X
1
Copy RDAC register to
EEPROM
10
0
1
1
1
0
A2
0
A0
X
X
X
X
X
X
X
0
Copy EEPROM into RDAC
11
1
0
0
0
0
0
A1
A0
D7
D6
D5
D4
D3
D2
D1
D0
Write contents of serial
register data to EEPROM
12
1
0
0
1
A3
A2
0
A0
1
0
0
0
0
0
0
D0
Top scale
D0 = 0; normal mode
D0 = 1; shutdown mode
13
1
0
0
1
A3
A2
0
A0
0
0
0
0
0
0
0
D0
Bottom scale
D0 = 1; enter
D0 = 0; exit
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
A2
0
A0
0
0
0
0
0
0
0
D0
Software shutdown
D0 = 0; normal mode
D0 = 1; device placed in
shutdown mode
16
1
1
0
1
X
X
X
X
X
X
X
X
X
D2
D1
D0
Copy serial register data to
control register
1 X means don’t care.


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