MAX5451 MAXIM [Maxim Integrated Products], MAX5451 Datasheet - Page 9

• Manufacturer Part Number: MAX5451
• Description: Dual, 256-Tap, Up/Down Interface, Digital Potentiometers
• Manufacturer: MAXIM [Maxim Integrated Products]

Figure 2. Simplified Digital Potentiometer Resistor Array
Figure 4. MAX5451/MAX5453/MAX5455 Simplified Functional
Diagram
U/D1
INC2
U/D2
INC1
GND
CS2
V
CS1
DD
UP/DOWN
POWER-ON
UP/DOWN
COUNTER
COUNTER
R
R
255
254
RESET
R
R
2
1
_______________________________________________________________________________________
H
L
MAX5451
MAX5453
MAX5455
S
S
S
S
S
S
POSITION
DECODER
POSITION
DECODER
256
255
254
3
2
1
Dual, 256-Tap, Up/Down Interface,
W
H1
W1
H2
W2
L1
L2
Figure 3. MAX5450/MAX5452/MAX5454 Simplified Functional
Diagram
Figure 5. Adjustable Current to Voltage Converter
GND
V
CS2
Digital Potentiometers
CS1
U/D
INC
DD
I
S
UP/DOWN
COUNTER
POWER-ON
UP/DOWN
COUNTER
RESET
R
3
V
DD
R
MAX4250
2
MAX5450
MAX5452
MAX5454
DECODER
DECODER
POSITION
POSITION
V
OUT
V
OUT
I
S
MAX5450
MAX5452
MAX5454
= R
3
(
1 +
R
R
2
1
)
+ R
2
W
L
R
1
W1
W2
L1
L2
9