Rainbow-electronics MAX5419 Bedienungsanleitung PDF herunterladen (Seite 1)

General Description

The MAX5417/MAX5418/MAX5419 nonvolatile, linear-

taper, digital potentiometers perform the function of a

mechanical potentiometer, but replace the mechanics

with a simple 2-wire digital interface, allowing communi-

cation with multiple devices. Each device performs the

same function as a discrete potentiometer or variable

resistor and has 256 tap points.

The devices feature an internal, nonvolatile EEPROM

used to store the wiper position for initialization during

power-up. The fast-mode I

C™-compatible serial inter-

face allows communication at data rates up to 400kbps,

minimizing board space and reducing interconnection

complexity in many applications. Each device is available

with one of four factory-preset addresses (see the

Selector Guide) and features an address input for a total

of eight unique address combinations.

The MAX5417/MAX5418/MAX5419 provide three nomi-

nal resistance values: 50kΩ (MAX5417), 100kΩ

(MAX5418), or 200kΩ (MAX5419). The nominal resistor

temperature coefficient is 50ppm/°C end-to-end, and

only 5ppm/°C ratiometric. This makes the devices ideal

for applications requiring a low-temperature-coefficient

variable resistor, such as low-drift, programmable gain-

amplifier circuit configurations.

The MAX5417/MAX5418/MAX5419 are available in a

3mm x 3mm 8-pin TDFN package, and are specified

over the extended -40°C to +85°C temperature range.

Applications

Mechanical Potentiometer Replacement

Low-Drift Programmable-Gain Amplifiers

Volume Control

Liquid-Crystal Display (LCD) Contrast Control

Features

♦ Power-On Recall of Wiper Position from

Nonvolatile Memory

♦ Tiny 3mm x 3mm 8-Pin TDFN Package

♦ 50ppm/°C End-to-End Resistance Temperature

Coefficient

♦ 5ppm/°C Ratiometric Temperature Coefficient

♦ 50kΩ/100kΩ/200kΩ Resistor Values

♦ Fast I

C-Compatible Serial Interface

♦ 500nA (typ) Static Supply Current

♦ Single-Supply Operation: +2.7V to +5.25V

♦ 256 Tap Positions

♦ ±0.5 LSB DNL in Voltage-Divider Mode

♦ ±0.5 LSB INL in Voltage-Divider Mode

MAX5417/MAX5418/MAX5419

256-Tap, Nonvolatile, I

C-Interface,

Digital Potentiometers

________________________________________________________________ Maxim Integrated Products 1

GND

SDA

SCL

8-BIT

SHIFT

8-BIT

LATCH

8-BIT

MEMORY

INTERFACE

256

256-

POSITION

DECODER

POR

MAX5417

MAX5418

MAX5419

Ordering Information/Selector Guide

Functional Diagram

19-3185; Rev 1; 3/04

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.

Pin Configuration appears at end of data sheet.

C is a trademark of Philips Corp.

Purchase of I

C components from Maxim Integrated Products,

Inc. or one of its sublicensed Associated Companies, conveys

a license under the Philips I

C Patent Rights to use these com-

ponents in an I

C system, provided that the system conforms

to the I

C Standard Specification as defined by Philips.

*Future product—contact factory for availability.

**Exposed pad.

PART TEMP RANGE PIN-PACKAGE I

C ADDRESS R (kΩ) TOP MARK

MAX5417LETA -40°C to +85°C 8 TDFN-EP** 010100A

50 AIB

MAX5417META* -40°C to +85°C 8 TDFN-EP** 010101A

50 ALS

MAX5417NETA* -40°C to +85°C 8 TDFN-EP** 010110A

50 ALT

MAX5417PETA* -40°C to +85°C 8 TDFN-EP** 010111A

50 ALU

MAX5418LETA -40°C to +85°C 8 TDFN-EP** 010100A

100 AIC

MAX5418META* -40°C to +85°C 8 TDFN-EP** 010101A

100 ALV

MAX5418NETA* -40°C to +85°C 8 TDFN-EP** 010110A

100 ALW

MAX5418PETA* -40°C to +85°C 8 TDFN-EP** 010111A

100 ALX

MAX5419LETA* -40°C to +85°C 8 TDFN-EP** 010100A

200 AID

MAX5419META* -40°C to +85°C 8 TDFN-EP** 010101A

200 ALY

MAX5419NETA* -40°C to +85°C 8 TDFN-EP** 010110A

200 ALZ

MAX5419PETA* -40°C to +85°C 8 TDFN-EP** 010111A

200 AMA

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Inhaltsverzeichnis

Seite 1 - Digital Potentiometers

General DescriptionThe MAX5417/MAX5418/MAX5419 nonvolatile, linear-taper, digital potentiometers perform the function of amechanical potentiometer, bu

Seite 2

MAX5417/MAX5418/MAX5419256-Tap, Nonvolatile, I2C-Interface, Digital Potentiometers10 _________________________________________________________________

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