Datasheet

MAX5402
256-Tap, µPoT, Low-Drift,
Digital Potentiometer
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= +5V, V
H
= V
DD
, V
L
= 0, T
A
= T
MIN
to T
MAX
. Typical values are at V
DD
= +5V, T
A
= +25°C, unless otherwise noted.)
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.
V
DD
to GND..............................................................-0.3V to +6V
DIN, SCLK, CS to GND ............................................-0.3V to +6V
H, L, W to GND.............................................-0.3V to (V
DD
+ 0.3)
Maximum Continuous Current into Pins H, L, and W ...........1mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin µMAX (derate 4.1mW/°C above +70°C) ............330mW
Operating Temperature Range ...........................-40°C to +85°C
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 N 8 Bits
Integral Nonlinearity (Notes 1, 2) INL ±1/2 LSB
Differential Nonlinearity
(Notes 1, 2)
DNL ±1 LSB
End-to-End Resistor Tempco TC
R
35 ppm/°C
Ratiometric Resistor Tempco 5 ppm/°C
Full-Scale Error -6 LSB
Zero-Scale Error +6 LSB
DC PERFORMANCE (Variable-Resistor Mode)
Resolution N 8 Bits
V
DD
= +5V ±1 LSB
Integral Nonlinearity
(Notes 1, 3)
INL
V
DD
= +3V ±3 LSB
V
DD
= +5V ±1/2 LSB
Differential Nonlinearity
(Notes 1, 3)
DNL
V
DD
= +3V ±1/2 LSB
DC PERFORMANCE (Resistor Characteristics)
V
DD
= +5V 275
Wiper Resistance (Note 4) R
W
V
DD
= +3V 550
Ω
Wiper Capacitance C
W
46 pF
End-to-End Resistance R
HL
7.5 10 12.5 kΩ
DIGITAL INPUTS
Input High Voltage V
IH
0.7 ✕ V
DD
V
Input Low Voltage V
IL
0.3 ✕ V
DD
V
Input Leakage Current ±1.0 µA
Input Capacitance 5pF
TIMING CHARACTERISTICS (ANALOG)
Wiper-Settling Time t
S
To 50% of fi nal val ue fr om cod e 0 to cod e 128 100 ns
TIMING CHARACTERISTICS (DIGITAL) (Note 5) (Figure 2)
SCLK Clock Period t
CP
100 ns
SCLK Pulse Width High t
CH
40 ns