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AD5142ABCPZ100-RL7 Datasheet(PDF) 22 Page - Analog Devices

Part # AD5142ABCPZ100-RL7
Description  Dual Channel, 128-/256-Position, I2C, Nonvolatile Digital Potentiometer
PDF  29 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD5142ABCPZ100-RL7 Datasheet(HTML) 22 Page - Analog Devices

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Data Sheet
AD5122A/AD5142A
THEORY OF OPERATION
analog.com
Rev. D | 22 of 29
ADVANCED CONTROL MODES
The AD5122A/AD5142A digital potentiometers include a set of user
programming features to address the wide number of applications
for these universal adjustment devices (see Table 13 and Table 15).
Key programming features include the following:
►
Input register
►
Linear gain setting mode
►
A low wiper resistance feature
►
Linear increment and decrement instructions
►
±6 dB increment and decrement instructions
►
Burst mode
►
Reset
►
Shutdown mode
Table 13. Advanced Command Operation Truth Table
Command
Number
Command
Bits[DB15:DB12]
Address Bits[DB11:DB8]1
Data Bits[DB7:DB0]1
Operation
C3
C2
C1
C0
A3
A2
A1
A0
D7
D6
D5
D4
D3
D2
D1
D0
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
X
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
0
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
X
X
X
X
X
X
D0
Top scale
D0 = 0; normal mode
D0 = 1; shutdown mode
13
1
0
0
1
A3
A2
0
A0
0
X
X
X
X
X
X
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
X
X
X
X
X
X
X
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
D3
D2
D1
D0
Copy serial register data to control
register, refer to Table 15
1 X = don’t care.



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