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General Description

The MAX5481–MAX5484 10-bit (1024-tap) nonvolatile,

linear-taper, programmable voltage-dividers and vari-

able resistors perform the function of a mechanical

potentiometer, but replace the mechanics with a pin-

configurable 3-wire serial SPI™-compatible interface or

up/down digital interface. The MAX5481/MAX5482 are

3-terminal voltage-dividers and the MAX5483/MAX5484

are 2-terminal variable resistors.

The MAX5481–MAX5484 feature an internal, non-

volatile, electrically erasable programmable read-only

memory (EEPROM) that stores the wiper position for ini-

tialization during power-up. The 3-wire SPI-compatible

serial interface allows communication at data rates up

to 7MHz. A pin-selectable up/down digital interface is

also available.

The MAX5481–MAX5484 are ideal for applications

requiring digitally controlled potentiometers. Two end-to-

end resistance values are available (10kΩ and 50kΩ) in a

voltage-divider or a variable-resistor configuration (see

the Selector Guide). The nominal resistor temperature

coefficient is 35ppm/°C end-to-end, and only 5ppm/°C

ratiometric, making these devices ideal for applications

requiring low-temperature-coefficient voltage-dividers,

such as low-drift, programmable gain-amplifiers.

The MAX5481–MAX5484 operate with either a +2.7V to

+5.25V single power supply or ±2.5V dual power sup-

plies. These devices consume 400µA (max) of supply

current when writing data to the nonvolatile memory

and 1.0µA (max) of standby supply current. The

MAX5481–MAX5484 are available in a space-saving

(3mm x 3mm), 16-pin TQFN, or a 14-pin TSSOP pack-

age and are specified over the extended (-40°C to

+85°C) temperature range.

Applications

Features

♦ 1024 Tap Positions

♦ Power-On Recall of Wiper Position from

Nonvolatile Memory

♦ 16-Pin (3mm x 3mm x 0.8mm) TQFN or 14-Pin

TSSOP Package

♦ 35ppm/°C End-to-End Resistance Temperature

Coefficient

♦ 5ppm/°C Ratiometric Temperature Coefficient

♦ 10kΩ and 50kΩ End-to-End Resistor Values

♦ Pin-Selectable SPI-Compatible Serial Interface or

Up/Down Digital Interface

♦ 1µA (max) Standby Current

♦ Single +2.7V to +5.25V Supply Operation

♦ Dual ±2.5V Supply Operation

MAX5481–MAX5484

10-Bit, Nonvolatile, Linear-Taper Digital

Potentiometers

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

N.C.

GND

101112

SPI/UD

DIN(U/D)

SCLK(INC)

4321

N.C.

INTERFACE

TOP VIEW

TQFN

*SEE FUNCTIONAL DIAGRAM

N.C.

GND

101112

SPI/UD

DIN(U/D)

SCLK(INC)

4321

N.C.

D.N.C.

N.C.

MAX5483

MAX5484

INTERFACE

TQFN

MAX5481*

MAX5482*

Pin Configurations

19-3708; Rev 0; 5/05

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

PART

†

PIN-PACKAGE PKG CODE

TOP

MARK

MAX5481ETE 16 TQFN-EP** T1633F-3 ACP

MAX5481EUD* 14 TSSOP — —

Selector Guide appears at end of data sheet.

SPI is a trademark of Motorola, Inc.

†

All devices are specified over the -40°C to +85°C operating

temperature range.

*Future product—contact factory for availability.

**EP = Exposed pad.

Ordering Information continued at end of data sheet.

Pin Configurations continued at end of data sheet.

Gain and Offset

Adjustment

LCD Contrast Adjustment

Pressure Sensors

Low-Drift Programmable

Gain Amplifiers

Mechanical Potentiometer

Replacement

1 2 3 4 5 6 ... 20 21

Résumé du contenu

Page 1 - Potentiometers

General DescriptionThe MAX5481–MAX5484 10-bit (1024-tap) nonvolatile,linear-taper, programmable voltage-dividers and vari-able resistors perform the f

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MAX5481–MAX548410-Bit, Nonvolatile, Linear-Taper DigitalPotentiometersMaxim cannot assume responsibility for use of any circuitry other than circuitry

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Page 20 - Package Information

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Rainbow-electronics MAX5484 Manuel d'utilisateur

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