Timing characteristics – Rainbow Electronics MAX5484 User Manual
Page 4
MAX5481–MAX5484
10-Bit, Nonvolatile, Linear-Taper Digital
Potentiometers
4
_______________________________________________________________________________________
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.