Rainbow Electronics MAX5475 - Manual (Page 6)

MAX5471/MAX5472/MAX5474/MAX5475
32-Tap, Nonvolatile, Linear-Taper Digital
Potentiometers in SOT23
6 _______________________________________________________________________________________
Pin Description
RESISTANCE DNL vs. TAP POSITION
(MAX5475)
MAX5471 toc19
TAP POSITION
RESISTANCE DNL
25 20 15 10 5
-0.03
-0.02
-0.01
0
0.01
0.02
0.03
0.04
-0.04
0 30
VOLTAGE-DIVIDER MODE
RESISTANCE INL vs. TAP POSITION
(MAX5475)
MAX5471 toc20
TAP POSITION
RESISTANCE INL
25 20 15 10 5
-0.03
-0.02
-0.01
0
0.01
0.02
0.03
0.04
-0.04
0 30
VOLTAGE-DIVIDER MODE
Typical Operating Characteristics (continued)
(V DD = 5.0V, T A = +25 °C, unless otherwise noted.)
PIN
MAX5471/
MAX5472
MAX5474/
MAX5475
NAME FUNCTION
1 1 CS
Chip-Select Input. Drive low to change wiper position (W) through INC and U/D. A low-to-
high transition with INC high stores the wiper position in nonvolatile memory.
2 3 GND Ground
3 4 U/D
Up/Down Control Input. With U/D low, a high-to-low INC transition decrements the wiper
position. With U/D high, a high-to-low INC transition increments the wiper position.
4 5 INC
Wiper Increment Control Input. With CS low, the wiper position moves in the direction
determined by the state of U/D on a high-to-low transition.
5 6 H
High Terminal of Resistor. The voltage at H can be greater than or less than the voltage at L.
Current can flow into or out of H.
6 2 V DD Power Supply
— 7 W Wiper Terminal of Resistor
— 8 L
Low Terminal of Resistor. The voltage at L can be greater than or less than the voltage at H.
Current can flow into or out of L.