Datasheet

MAX5477/MAX5478/MAX5479
Dual, 256-Tap, Nonvolatile, I
2
C-Interface,
Digital Potentiometers
_______________________________________________________________________________________ 5
0
0.2
0.6
0.4
0.8
1.0
-40 10-15 35 60 85
SUPPLY CURRENT
vs. TEMPERATURE (MAX5477)
MAX5477/78/79 toc01
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
V
CC
= 5V
WP = V
DD
V
CC
= 3V
5
7
11
9
13
15
-40 10-15 35 60 85
SUPPLY CURRENT
vs. TEMPERATURE
MAX5477/78/79 toc1a
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
V
CC
= 5V
WP = GND
V
CC
= 3V
0
100
50
200
150
300
250
350
450
400
500
0649632 128 160 192 224 256
WIPER RESISTANCE
vs. INPUT CODE
MAX5477/78/79 toc02
INPUT CODE
WIPER RESISTANCE (Ω)
200ns/div
TAP-TO-TAP SWITCHING TRANSIENT
SDA
2V/div
W_
50mV/div
MAX5477/78/79 toc03
MAX5477
C
L
= 10pF
H_ = V
DD
FROM TAP 00 TO TAP 04
TAP-TO-TAP SWITCHING TRANSIENT
MAX5477/78/79 toc04
1µs/div
SDA
2V/div
W_
20mV/div
MAX5478
C
L
= 10pF
H_ = V
DD
FROM TAP 00 TO TAP 04
TAP-TO-TAP SWITCHING TRANSIENT
MAX5477/78/79 toc05
400ns/div
SDA
2V/div
W_
20mV/div
MAX5479
C
W_
= 10pF
H_ = V
DD
FROM TAP 00 TO TAP 04
2µs/div
WIPER TRANSIENT AT POWER-ON
V
DD
2V/div
W_
1V/div
MAX5477/78/79 toc06
MAX5477
TAP = 128
WIPER TRANSIENT AT POWER-ON
MAX5477/78/79 toc07
4µs/div
V
DD
2V/div
W_
1V/div
MAX5478
TAP = 128
WIPER TRANSIENT AT POWER-ON
MAX5477/78/79 toc08
2µs/div
V
DD
2V/div
W_
1V/div
MAX5479
TAP = 128
Typical Operating Characteristics
(V
DD
= +5V, H_ = V
DD
, L_ = GND, T
A
= +25°C, unless otherwise noted.)