User guide

MAX5128
128-Tap, Nonvolatile, Linear-Taper Digital
Potentiometer in 2mm x 2mm µDFN Package
6 _______________________________________________________________________________________
-0.20
-0.15
0.15
-0.05
-0.10
0
0.05
0.10
0.20
DIFFERENTIAL NONLINEARITY
vs. CODE (VARIABLE RESISTOR)
MAX5128 toc10
DNL (LSB)
V
CC
= 2.7V, T
A
= -40°C
0243612 48 60 72 84 96 108 120
CODE
-0.20
-0.15
0.15
-0.05
-0.10
0
0.05
0.10
0.20
DIFFERENTIAL NONLINEARITY
vs. CODE (VARIABLE RESISTOR)
MAX5128 toc11
DNL (LSB)
V
CC
= 2.7V, T
A
= +25°C
0243612 48 60 72 84 96 108 120
CODE
-0.25
-0.15
-0.20
0
-0.05
-0.10
0.05
0.10
0.20
0.15
0.25
0243612 48 60 72 84 96 108 120
MAX5128 toc12
CODE
DNL (LSB)
DIFFERENTIAL NONLINEARITY
vs. CODE (VARIABLE RESISTOR)
V
CC
= 2.7V, T
A
= +85°C
-20
20
0
80
60
40
100
120
140
160
0243612 48 60 72 84 96 108 120
RATIOMETRIC TEMPERATURE
COEFFICIENT vs. CODE (VOLTAGE-DIVIDER)
MAX5128 toc13
CODE
RATIOMETRIC TEMPCO (ppm/°C)
T
A
= -40°C TO +85°C
V
CC
= 2.7V
-100
100
0
400
300
200
500
600
800
700
900
0243612 48 60 72 84 96 108 120
MAX5128 toc14
CODE
TC
VR
(ppm/°C)
TEMPERATURE COEFFICIENT
vs. CODE (VARIABLE RESISTOR)
T
A
= -40°C TO +85°C
V
CC
= 2.7V
-1.0
-0.4
-0.6
-0.8
-0.2
0
0.2
0.4
0.6
0.8
1.0
-40 10-15 35 60 85
END-TO-END RESISTANCE (R
HL
)
% CHANGE vs. TEMPERATURE
MAX5128 toc15
TEMPERATURE (°C)
END-TO-END RESISTANCE CHANGE (%)
0
0.3
0.9
0.6
1.2
1.5
-40 10-15 35 60 85
STANDBY SUPPLY CURRENT
vs. TEMPERATURE
MAX5128 toc16
TEMPERATURE (°C)
I
DD
(µA)
V
CC
= 5.25V
V
CC
= 3.3V
V
CC
= 2.7V
Typical Operating Characteristics (continued)
(V
CC
= +5.0V, T
A
= +25°C, unless otherwise noted.)