Datasheet

10-Bit, Nonvolatile, Linear-Taper Digital
Potentiometers
TIMING CHARACTERISTICS
(V
DD
= +2.7V to +5.25V, V
SS
= V
GND
= 0V, V
H
= V
DD
, V
L
= 0V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at
V
DD
= +5.0V, T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
ANALOG SECTION
MAX5481 5
Wiper Settling Time (Note 6) t
S
MAX5482 22
µs
SPI-COMPATIBLE SERIAL INTERFACE (Figure 3)
SCLK Frequency f
SCLK
7 MHz
SCLK Clock Period t
CP
140 ns
SCLK Pulse-Width High t
CH
60 ns
SCLK Pulse-Width Low t
CL
60 ns
CS Fall to SCLK Rise Setup t
CSS
60 ns
SCLK Rise to CS Rise Hold t
CSH
0ns
DIN to SCLK Setup t
DS
40 ns
DIN Hold after SCLK t
DH
0ns
SCLK Rise to CS Fall Delay t
CS0
15 ns
CS Rise to SCLK Rise Hold t
CS1
60 ns
CS Pulse-Width High t
CSW
150 ns
Write NV Register Busy Time t
BUSY
12 ms
UP/DOWN DIGITAL INTERFACE (Figure 8)
CS to INC Setup t
CI
25 ns
INC High to U/D Change t
ID
20 ns
U/D to INC Setup t
DI
25 ns
INC Low Period t
IL
25 ns
INC High Period t
IH
25 ns
INC Inactive to CS Inactive t
IC
50 ns
CS Deselect Time (Store) t
CPH
50 ns
INC Cycle Time t
CYC
50 ns
INC Active to CS Inactive t
IK
50 ns
Wiper Store Cycle t
WSC
12 ms
Note 1: 100% production tested at T
A
= +25°C and T
A
= +85°C. Guaranteed by design to T
A
= -40°C.
Note 2: The DNL and INL are measured with the device configured as a voltage-divider with H = V
DD
and L = V
SS
. The wiper termi-
nal (W) is unloaded and measured with a high-input-impedance voltmeter.
Note 3: The DNL_R and INL_R are measured with D.N.C. unconnected and L = V
SS
= 0V. For V
DD
= +5V, the wiper terminal is dri-
ven with a source current of I
W
= 80µA for the 50kΩ device and 400µA for the 10kΩ device. For V
DD
= +3V, the wiper termi-
nal is driven with a source current of 40µA for the 50kΩ device and 200µA for the 10kΩ device.
Note 4: The wiper resistance is measured using the source currents given in Note 3.
Note 5: The device draws higher supply current when the digital inputs are driven with voltages between (V
DD
- 0.5V) and (V
GND
+
0.5V). See Supply Current vs. Digital Input Voltage in the
Typical Operating Characteristics .
Note 6: Wiper settling test condition uses the voltage-divider configuration with a 10pF load on W. Transition code from 00000 00000
to 01111 01111 and measure the time from CS going high to the wiper voltage settling to within 0.5% of its final value.
MAX5481–MAX5484
4
Maxim Integrated