Typical Operating Characteristics
(V
DD
= 5.0V, T
A
= +25°C, unless otherwise noted.)
MAX5422/MAX5423/MAX5424
256-Tap, Nonvolatile, SPI-Interface,
Digital Potentiometers
4 _______________________________________________________________________________________
TIMING CHARACTERISTICS (continued)
(V
DD
= +2.7V to +5.25V, H = V
DD
, L = GND, T
A
= -40°C to +85°C. Typical values are at V
DD
= +5.0V, T
A
= +25°C, unless otherwise
noted. See Figure 1.) (Note 7)
Note 1: The DNL and INL are measured with the potentiometer configured as a voltage-divider with H = V
DD
and L = GND. The
wiper terminal is unloaded and measured with a high-input-impedance voltmeter.
Note 2: 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 80µA for the 50kΩ configuration, 40µA for the
100kΩ configuration, and 20µA for the 200kΩ configuration. For the 3V condition, the wiper terminal is driven with a source
current of 40µA for the 50kΩ configuration, 20µA for the 100kΩ, and 10µA for the 200kΩ configuration.
Note 3: The wiper resistance is measured using the source currents given in Note 2. For operation to V
DD
= 2.7V, see Maximum
Wiper Resistance vs. Temperature in the Typical Operating Characteristics.
Note 4: 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 5: Wiper at midscale with a 10pF load (DC measurement). L = GND; an AC source is applied to H; and the W output is mea-
sured. A 3dB bandwidth occurs when the AC W/H value is 3dB lower than the DC W/H value.
Note 6: The programming current operates only during power-up and NV writes.
Note 7: Digital timing is guaranteed by design and characterization, and is not production tested.
Note 8: Wiper-settling time is the worst-case 0% to 50% rise-time measured between consecutive wiper positions. H = V
DD
, L =
GND, and the wiper terminal is unloaded and measured with a 10pF oscilloscope probe.
