Digital Potentiometers

4

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Note 1:

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 50k

Ω configuration, 40µA for the

100k

Ω configuration, and 20µA for the 200kΩ configuration. For the 3V condition, the wiper terminal is driven with a source

current of 40µA for the 50k

Ω configuration, 20µA for the 100kΩ configuration, and 10µA for the 200kΩ configuration.

Note 3:

Resistance vs. Temperature in the

Typical Operating Characteristics.

Note 4:

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:

Note 8:

L = GND, and the wiper terminal is unloaded and measured with a 10pF oscilloscope probe (see the

Typical Operating

Characteristics for the tap-to-tap switching transient).

Note 9:

An appropriate bus pullup resistance must be selected depending on board capacitance. Refer to the document linked to

this web address: www.semiconductors.philips.com/acrobat/literature/9398/39340011.pdf.

Note 10: The idle time begins from the initiation of the stop pulse.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Data Setup Time

100

ns

Data Hold Time

0

0.9

µs

SDA, SCL Rise Time

300

ns

SDA, SCL Fall Time

300

ns

Setup Time for STOP Condition

0.6

µs

Bus Free Time Between STOP

and START Condition

Minimum power-up rate = 0.2V/ms

1.3

µs

Pulse Width of Spike Suppressed

50

ns

Maximum Capacitive Load for

Each Bus Line

(Note 9)

400

pF

Write NV Register Busy Time

(Note 10)

12

ms

TIMING CHARACTERISTICS (continued)

+25°C. See Figures 1 and 2.) (Note 7)