MAX5451 datasheet(3/12 Pages) MAXIM

3 / 12 page

Dual, 256-Tap, Up/Down Interface,

Digital Potentiometers

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Note 1: Linearity is defined in terms of the H_ to L_ code-dependent resistance.

Note 2: The DNL and INL are measured with the potentiometer configured as a voltage divider with H_ = VDD and L_ = GND. The

wiper terminal is unloaded and measured with an ideal voltmeter.

Note 3: The DNL and INL are measured with the potentiometer configured as a variable resistor. For the 3-terminal potentiometers

(MAX5451/MAX5453/MAX5455), H_ is unconnected and L_ = GND. For the 2-terminal potentiometers

(MAX5450/MAX5452/MAX5454), L_ = GND. At VDD = +5V, the wiper terminal is driven with a source current of 400µA for the

10k

Ω configuration, 80µA for the 50kΩ configuration, and 40µA for the 100kΩ configuration. At VDD = +3V,

200µA/40µA/20µA for 10k

Ω/50kΩ/100kΩ configuration, respectively.

Note 4: The wiper resistance is the worst value measured by injecting the currents given in Note 3 into W_ with L_ = GND. RW_ =

(VW_ - VH_) / IW_.

Note 5: Device draws higher supply current when digital inputs are driven with voltages between 0.3 x VDD and 0.7 x VDD. (See

Supply Current vs. Digital Input Voltage in the Typical Operating Characteristics.)

Note 6: Wiper-Settling Time is the worst case 0% to 50% rise-time measured between consecutive wiper positions. H_ = VDD, L_ =

GND, and the wiper terminal is unloaded and measured with a 10pF oscilloscope probe (see Tap-To-Tap Switching

Transient in the Typical Operating Characteristics).

Note 7: Digital timing is guaranteed by design.

ELECTRICAL CHARACTERISTICS (continued)

(VDD = +2.7V to +5.5V, VH = VDD, VL = 0; TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDD = +5V, TA = +25°C,

unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

DIGITAL INPUTS (Note 5)

Input High Voltage

VIH

0.7 x VDD

Input Low Voltage

VIL

0.3 x VDD

Input Leakage Current

±1.0

µA

Input Capacitance

5pF

TIMING CHARACTERISTICS (Analog)

MAX5451

0.5

MAX5453

1.2

Wiper-Settling Time

(Note 6)

tIW

MAX5455

1.8

µs

TIMING CHARACTERISTICS (Digital, Note 7, Figure 1)

Maximum

INC Frequency

fMAX

MHz

CS to INC Setup Time

tCI

CS to INC Hold Time

tIC

0ns

INC Low Period

tIL

INC High Period

tIH

D to INC Setup

tDI

D to INC Hold

tID

0ns

POWER SUPPLIES

Supply Voltage

VDD

2.7

5.5

VDD = +5V

0.7

Supply Current

IDD

CS = INC = U/D = VDD

or GND

VDD = +2.7V

0.1

µA

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