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AD5263BRU20-REEL7 Datasheet(PDF) 5 Page - Analog Devices

Part No. AD5263BRU20-REEL7
Description  Preliminary Technical Data
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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PRELIMINARY TECHNICAL DATA
Quad +15V Digital Potentiometers
AD5263
08 AUG ’02, REV PrD
- 5 -
SPI Compatible Digital Interface (DIS=’0’)
TABLE IA: SPI 10-Bit Serial-Data Word
Format
ADDR
DATA
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
A1
A0
D7
D6
D5
D4
D3
D2
D1
D0
MSB
LSB
29
27
20
A1
A0
D7
D6
D5
D4
D3
D1
D0
S DI
CLK
CS
VOUT
0
1
0
1
0
1
0
1
D2
RDAC REGISTER LOAD
Figure 1A. SPI Timing Diagram
1
0
1
0
1
0
VDD
0V
SDI
(Data In)
CLK
CS
VOUT
±1 LSB ERROR BAND
±1 LSB
tS
tCSH1
tCSS
tCL
tCH
tDS
tDH
Ax or Dx
tCSH0
tCSW
tCS1
Ax or Dx
tPD_MAX
1
0
SDO
(Data Out)
A'x or D'x
A'x or D'x
Figure 1B. Detail SPI Timing Diagram
I
2C Compatible Digital Interface (DIS=’1’)
TABLE IIA: I
2C Write Mode Data Word Format
S
0
1
0
1
1
A
D
1
A
D
0
W
W
W
W
A
X
A
1
A
0
R
S
S
D
O
1
O
2
X
A
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
A
P
Slave Address Byte
Instruction Byte
Data Byte
TABLE IIB: I
2C Read Mode Data Word Format:
S
0
1
0
1
1
0
A
D
0
R
A
D
7
D
8
D
5
D
4
D
3
D
2
D
1
D
0
A
P
Slave Address Byte
Data Byte
S = Start Condition
P = Stop Condition
A = Acknowledge
AD1, AD0 = Package pin programmable address bits, Must match
with the logic states at pins AD1, AD0
A1, A0 = RDAC sub address select
RS = Software Reset wiper (A1, A0) to mid scale position
SD = Shutdown active high, ties wiper (A1, A0) to terminal A,
opens terminal B, RDAC register contents are not disturbed. To exit
shutdown a command SD = ‘0’ must be executed for each RDAC
(A1, A0).
W
W
W
W = Write = ‘0’
R = Read = ‘1’
D7,D6,D5,D4,D3,D2,D1,D0 = Data Bits
X = Don’t Care
t
4
SDA
SCL
PS
Sr
P
t
1
t
2
t
3
t
5
t
6
t
7
t
8
t
8
t
9
t
10
Figure 2. I
2C Compatible Detail Timing Diagram




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