AD5232 Analog Devices, AD5232 Datasheet - Page 6

• Manufacturer Part Number: AD5232
• Description: 2-Channel/ 256-Position Digital Potentiometer
• Manufacturer: Analog Devices

Pin
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
AD5232
Mnemonic
CLK
SDI
SDO
GND
V
A1
W1
B1
B2
W2
A2
V
WP
PR
CS
RDY
SS
DD
Description
Serial Input Register Clock Pin. Shifts in one bit at a time on positive clock edges.
Serial Data Input Pin. MSB Loaded First.
Serial Data Output Pin. Open Drain Output requires external pull-up resistor. Commands 9 and 10
activate the SDO output. See Table II. Other commands shift out the previously loaded SDI bit
pattern delayed by 16 clock pulses. This allows daisy-chain operation of multiple packages.
Ground Pin, Logic Ground Reference.
Negative Supply. Connect to zero volts for single supply applications.
A Terminal of RDAC1
Wiper Terminal of RDAC1, ADDR(RDAC1) = 0
B Terminal of RDAC1
B Terminal of RDAC2
Wiper Terminal of RDAC2, ADDR(RDAC2) = 1
A Terminal of RDAC2
Positive Power Supply Pin
Write Protect Pin. When active low, WP prevents any changes to the present register contents, except
PR and CMD 1 and 8 will refresh RDAC register from EEMEM. Execute a NOP instruction before
returning WP to logic high.
Hardware Override Preset Pin. Refreshes the scratch pad register with current contents of the EEMEM
register. Factory default loads midscale 80
(PR is activated at the logic high transition).
Serial Register Chip Select Active Low. Serial register operation takes place when CS returns to logic high.
Ready. Active-high open drain output, requires pull-up resistor. Identifies completion of commands
2, 3, 8, 9, 10, and PR.
PIN FUNCTION DESCRIPTIONS
PIN CONFIGURATION
GND
SDO
CLK
V
SDI
W1
A1
B1
SS
1
2
3
4
5
6
7
8
(Not to Scale)
TOP VIEW
AD5232
16
15
14
13
12
11
10
9
H
RDY
CS
PR
WP
A2
W2
B2
V
until EEMEM is loaded with a new value by the user
DD
H
H