AD8400_15 Datasheet, PDF (13/32 Pages) Analog Devices – Digital Potentiometers

AD8400/AD8402/AD8403
Table 9. AD8403 Pin Function Descriptions
Pin No. Mnemonic Description
1
AGND2
Analog Ground 2.¹
2
B2
Terminal B RDAC 2.
3
A2
Terminal A RDAC 2.
4
W2
Wiper RDAC 2, Addr = 012.
5
AGND4
Analog Ground 4.¹
6
B4
Terminal B RDAC 4.
7
A4
Terminal A RDAC 4.
8
W4
Wiper RDAC 4, Addr = 112.
9
DGND
Digital Ground.¹
10
SHDN
Active Low Input. Terminal A open circuit. Shutdown controls Variable Resistor 1 through Variable Resistor 4.
11
CS
Chip Select Input, Active Low. When CS returns high, data in the serial input register is decoded,
based on the address bits, and loaded into the target DAC register.
12
SDI
Serial Data Input.
13
SDO
Serial Data Output. Open drain transistor requires a pull-up resistor.
14
CLK
Serial Clock Input, Positive Edge Triggered.
15
RS
Active Low Reset to Midscale. Sets RDAC registers to 80H.
16
VDD
Positive Power Supply. Specified for operation at both 3 V and 5 V.
17
AGND3
Analog Ground 3.¹
18
W3
Wiper RDAC 3, Addr = 102.
19
A3
Terminal A RDAC 3.
20
B3
Terminal B RDAC 3.
21
AGND1
Analog Ground 1.¹
22
W1
23
A1
Wiper RDAC 1, Addr = 002.
Terminal A RDAC 1.
24
B1
Terminal B RDAC 1.
1 _{All AGND pins must be connected to DGND.}
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