EVAL-AD5235EBZ Analog Devices Inc, EVAL-AD5235EBZ Datasheet - Page 9

• Manufacturer Part Number: EVAL-AD5235EBZ
• Description: BOARD EVALUATION FOR AD5235
• Manufacturer: Analog Devices Inc

Specifications of EVAL-AD5235EBZ

• Main Purpose: Digital Potentiometer
• Utilized Ic / Part: AD5235
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 4. Pin Function Descriptions
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Mnemonic
CLK
SDI
SDO
GND
V
A1
W1
B1
B2
W2
A2
V
WP
PR
CS
RDY
SS
DD
Description
Serial Input Register Clock. Shifts in one bit at a time on positive clock edges.
Serial Data Input. Shifts in one bit at a time on positive clock CLK edges. MSB loads first.
Serial Data Output. Serves readback and daisy-chain functions. Command 9 and Command 10 activate the SDO
output for the readback function, delayed by 24 or 25 clock pulses, depending on the clock polarity before and
after the data-word (see Figure 2 and Figure 3). In other commands, the SDO shifts out the previously loaded SDI
bit pattern, delayed by 24 or 25 clock pulses depending on the clock polarity (see Figure 2 and Figure 3). This
previously shifted out SDI can be used for daisy-chaining multiple devices. Whenever SDO is used, a pull-up
resistor in the range of 1 kΩ to 10 kΩ is needed.
Ground Pin, Logic Ground Reference.
Negative Supply. Connect to 0 V for single-supply applications. If V
2 mA for 15 ms when storing data to EEMEM.
Terminal A of RDAC1.
Wiper terminal of RDAC1. ADDR (RDAC1) = 0x0.
Terminal B of RDAC1.
Terminal B of RDAC2.
Wiper terminal of RDAC2. ADDR (RDAC2) = 0x1.
Terminal A of RDAC2.
Positive Power Supply.
Optional Write Protect. When active low, WP prevents any changes to the present contents, except PR strobe.
CMD_1 and COMD_8 refresh the RDAC register from EEMEM. Tie WP to V
Optional Hardware Override Preset. Refreshes the scratchpad register with current contents of the EEMEM
register. Factory default loads midscale until EEMEM is loaded with a new value by the user. PR is activated
at the logic high transition. Tie PR to V
Serial Register Chip Select Active Low. Serial register operation takes place when CS returns to logic high.
Ready. Active high open-drain output. Identifies completion of Instruction 2, Instruction 3, Instruction 8,
Instruction 9, Instruction 10, and PR.
SDO
GND
CLK
V
SDI
W1
A1
B1
SS
Figure 4. Pin Configuration
4
1
2
3
5
6
7
8
Rev. D | Page 9 of 32
DD
(Not to Scale)
, if not used.
AD5235
TOP VIEW
16
15
14
13
12
11
10
9
RDY
CS
PR
WP
V
A2
W2
B2
DD
SS
is used in dual supply, it must be able to sink
DD
, if not used.
AD5235