Timing characteristics (continued) – Rainbow Electronics MAX5128 User Manual
Page 4
MAX5128
128-Tap, Nonvolatile, Linear-Taper Digital
Potentiometer in 2mm x 2mm µDFN Package
4
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TIMING CHARACTERISTICS (continued)
(V
CC
= +2.7V to +5.25V, H = V
CC
, L = GND, T
A
= -40°C to +85°C. Typical values are at V
CC
= +5.0V, T
A
= +25°C, unless otherwise noted.)
(See Figures 1, 2, 3, and 4).
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
NVM-Write Mode Pulse-Width
High
t
WP
80
ns
Write NV Register Busy Time
t
BUSY
14
ms
Power-Up Settling Time
t
ACC
(Note 8)
2
µs
Note 1: All devices are production tested at T
A
= +25°C and are guaranteed by design for T
A
= -40°C to +85°C.
Note 2: The DNL and INL are measured with the potentiometer configured as a voltage-divider with H = V
CC
and L = GND. The
wiper terminal is unloaded and measured with a high input-impedance voltmeter.
Note 3: The DNL and INL are measured with the potentiometer configured as a variable resistor. H is unconnected and L = GND.
For the +5V condition, the wiper terminal is driven with a source current of 200µA and for the +2.7V condition, the wiper ter-
minal is driven with a source current of 100µA.
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
CC
- 0.5V) and (GND +
0.5V). See Supply Current vs. Digital Input Voltage in the Typical Operating Characteristics.
Note 6: Wiper at midscale with a 10pF load, L = GND, an AC source is applied to H, and the output is measured as 3dB lower than
the DC W/H value in dB.
Note 7: Wiper-settling time is the worst-case 0 to 50% rise time measured between consecutive wiper positions. H = V
CC
, L = GND,
and the wiper terminal is unloaded and measured with a 10pF oscilloscope probe. See the Tap-to-Tap Switching Transient
in the Typical Operating Characteristics section.
Note 8: Power-up settling time is measured from the time V
CC
= 2.7V to the wiper settling to 1 LSB of the final value.