C-interface, digital potentiometers – Rainbow Electronics MAX5479 User Manual
Page 2
MAX5477/MAX5478/MAX5479
Dual, 256-Tap, Nonvolatile, I
2
C-Interface,
Digital Potentiometers
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL 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.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
SDA, SCL, V
DD
to GND .........................................-0.3V to +6.0V
All Other Pins to GND.................................-0.3V to (V
DD
+ 0.3V)
Maximum Continuous Current into H_, L_, and W_
MAX5477......................................................................
±5.0mA
MAX5478......................................................................
±1.3mA
MAX5479......................................................................
±0.6mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin Thin QFN (derate 17.5mW/°C above +70°C) 1399mW
14-Pin TSSOP (derate 9.1mW/°C above +70°C) .........727mW
Operating Temperature Range ...........................-40°C to +85°C
Maximum Junction Temperature .....................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC PERFORMANCE (VOLTAGE-DIVIDER MODE)
Resolution
256
Taps
Integral Nonlinearity
INL
(Note 2)
±1
LSB
Differential Nonlinearity
DNL
(Note 2)
±0.5
LSB
Dual Code Matching
R0 and R1 set to same code (all codes)
±1
LSB
End-to-End Resistance
Temperature Coefficient
TC
R
35
ppm/°C
Ratiometric Resistance
Temperature Coefficient
5
ppm/°C
MAX5477
-3
MAX5478
-0.6
Full-Scale Error
MAX5479
-0.3
LSB
MAX5477
3
MAX5478
0.6
Zero-Scale Error
MAX5479
0.3
LSB
DC PERFORMANCE (VARIABLE-RESISTOR MODE)
V
DD
= 3V
±3
Integral Nonlinearity (Note 3)
INL
V
DD
= 5V
±1.5
LSB
V
DD
= 3V, MAX5477, guaranteed
monotonic
±1
V
DD
= 3V, MAX5478
±1
V
DD
= 3V, MAX5479
±1
Differential Nonlinearity (Note 3)
DNL
V
DD
= 5V
±1
LSB
Dual Code Matching
R0 and R1 set to same code
(all codes), V
DD
= 3V or 5V
±3
LSB
DC PERFORMANCE (RESISTOR CHARACTERISTICS)
Wiper Resistance
R
W
(Note 4)
325
675
Ω
Wiper Capacitance
C
W
10
pF
MAX5477
7.5
10
12.5
MAX5478
37.5
50
62.5
End-to-End Resistance
R
HL
MAX5479
75
100
125
k
Ω