Manual

MAX5477/MAX5478/MAX5479
Dual, 256-Tap, Nonvolatile, I
2
C-Interface,
Digital Potentiometers
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +2.7V to +5.25V, H_ = V
DD
, L_ = GND, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
DD
= +5V, T
A
=
+25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS MIN TYP MAX
UNITS
DIGITAL INPUTS
V
DD
= 3.4V to 5.25V 2.4
Input High Voltage (Note 5) V
IH
V
DD
< 3.4V
0.7 x V
DD
V
Input Low Voltage V
IL
(Note 5) 0.8 V
Output Low Voltage V
OL
I
SINK
= 3mA 0.4 V
WP Pullup Resistance I
WP
255 kΩ
Input Leakage Current I
LEAK
±1 µA
Input Capacitance 5pF
DYNAMIC CHARACTERISTICS
Crosstalk
HA = 1kHz (0 to V
DD
), LA = GND,
LB = GND, measure WB
-80 dB
MAX5478 100
3dB Bandwidth (Note 6)
MAX5479 50
kHz
Total Harmonic Distortion Plus
Noise
THD+N
H_ = 1V
RMS
, f = 1kHz, L_ = GND,
measure W_
0.003
%
NONVOLATILE MEMORY RELIABILITY
Data Retention T
A
= +85°C 50
Years
T
A
= +25°C
200,000
Endurance
T
A
= +85°C
50,000
Stores
POWER SUPPLY
Power-Supply Voltage V
DD
2.70 5.25 V
Writing to EEPROM, digital inputs at
GND or V
DD
(Note 7)
250 400
WP = GND
15 20.6
Supply Current I
DD
Normal operation, digital
inputs at GND or V
DD
WP = V
DD
0.5 1
µA
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
ANALOG SECTION
MAX5478 500
Wiper Settling Time (Note 10) t
WS
MAX5479 1000
ns
DIGITAL SECTION
SCL Clock Frequency f
SCL
400 kHz
Setup Time for START Condition t
SU:STA
0.6 µs
Hold Time for START Condition t
HD:STA
0.6 µs
TIMING CHARACTERISTICS
(V
DD
= +2.7V to +5.25V, H_ = V
DD
, L_ = GND, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
DD
= +5V,
T
A
= +25°C. See Figure 1.) (Notes 8 and 9)