EVAL-AD5282EBZ Analog Devices Inc, EVAL-AD5282EBZ Datasheet - Page 24
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EVAL-AD5282EBZ
Manufacturer Part Number
EVAL-AD5282EBZ
Description
Dual 8-Bit I2C Dig POT
Manufacturer
Analog Devices Inc
Datasheet
1.AD5280BRUZ50.pdf
(28 pages)
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