EVAL-AD5282EBZ Analog Devices Inc, EVAL-AD5282EBZ Datasheet - Page 24

• Manufacturer Part Number: EVAL-AD5282EBZ
• Description: Dual 8-Bit I2C Dig POT
• Manufacturer: Analog Devices Inc

Specifications of EVAL-AD5282EBZ

• Main Purpose: Digital Potentiometer
• Embedded: No
• Utilized Ic / Part: AD5282
• Primary Attributes: 2 Channel, 256 Position
• Secondary Attributes: I²C Interface
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD5280/AD5282
RDAC CIRCUIT SIMULATION MODEL
The internal parasitic capacitances and the external capacitive
loads dominate the ac characteristics of the RDACs. Configured
as a potentiometer divider, the −3 dB bandwidth of the AD5280
(20 kΩ resistor) measures 310 kHz at half scale. Figure 24
provides the Bode plot characteristics of the three available
resistor versions: 20 kΩ, 50 kΩ, and 200 kΩ. A parasitic
simulation model is shown in Figure 65. A macro model net list
for the 20 kΩ RDAC is provided.
Figure 65. RDAC Circuit Simulation Model for RDAC = 20 kΩ
A
RDAC
20kΩ
B
Rev. C | Page 24 of 28
MACRO MODEL NET LIST FOR RDAC
.PARAM D=256, RDAC=20E3
*
.SUBCKT DPOT (A,W,B)
*
CA
RWA
CW
RWB
CB
*
.ENDS DPOT
A
A
W
W
B
0
W
0
B
0
25E-12
{(1-D/256)*RDAC+60}
55E-12
{D/256*RDAC+60}
25E-12