Rainbow Electronics MAX5484 - Manual (Page 4)

MAX5481–MAX5484
10-Bit, Nonvolatile, Linear-Taper Digital
Potentiometers
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TIMING CHARACTERISTICS
(V DD = +2.7V to +5.25V, V SS = GND = 0, V H = V DD , V L = 0, 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 0 ns
DIN to SCLK Setup t DS 40 ns
DIN Hold after SCLK t DH 0 ns
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 = 0. For V DD = 5V, the wiper terminal is driven
with a source current of I W = 80µA for the 50k
Ω device and 400µA for the 10kΩ device. For V
DD = 3V, the wiper terminal is
driven with a source current of 40µA for the 50k Ω 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 (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.