Datasheet

MAX5450–MAX5455
Dual, 256-Tap, Up/Down Interface,
Digital Potentiometers
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Figure 3. MAX5450/MAX5452/MAX5454 Simplified Functional
Diagram
POSITION
DECODER
GND
W1
L1
MAX5450
MAX5452
MAX5454
W2
L2
V
DD
CS1
CS2
UP/DOWN
COUNTER
UP/DOWN
COUNTER
POSITION
DECODER
POWER-ON
RESET
U/D
INC
Figure 4. MAX5451/MAX5453/MAX5455 Simplified Functional
Diagram
POSITION
DECODER
GND
H1
L1
MAX5451
MAX5453
MAX5455
H2
W1
W2
L2
V
DD
CS1
U/D1
U/D2
INC1
INC2
CS2
UP/DOWN
COUNTER
UP/DOWN
COUNTER
POSITION
DECODER
POWER-ON
RESET
Figure 2. Simplified Digital Potentiometer Resistor Array
W
H
L
R
255
S
256
S
255R
254
R
2
R
1
S
254
S
3
S
2
S
1
Figure 5. Adjustable Current to Voltage Converter
MAX4250
MAX5450
MAX5452
MAX5454
I
S
R
3
V
DD
R
2
V
OUT
W
L
R
1
( )
R
2
R
1
V
OUT
I
S
1 += R
3
+ R
2