Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsData collecting ICsData acquisition IC - Digital potentiometer linear Permanent TSOT 23 6

General Description

The MAX5471/MAX5472/MAX5474/MAX5475 linear-

taper digital potentiometers function as mechanical

potentiometers, but replace the mechanics with a sim-

ple 3-wire up/down digital interface. These digital

potentiometers feature nonvolatile memory (EEPROM)

to return the wiper to its previously stored position upon

power-up.

The MAX5471/MAX5472 are 2-terminal, variable resistors

in 6-pin SOT23 packages. The MAX5474/MAX5475 are

3-terminal potentiometers in 8-pin SOT23 packages.

The MAX5471/MAX5474 have an end-to-end resistance

of 50kΩ, and the MAX5472/MAX5475 have an end-

to-end resistance of 100kΩ. All of these devices have

32 wiper positions, a low ratiometric temperature coeffi-

cient (5ppm/°C), and all operate from a single +2.7V to

+5.25V supply. Each device is guaranteed over the

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

Applications

Mechanical Potentiometer Replacement

Liquid-Crystal-Display (LCD) Screen Adjustment

Audio Volume Control

Programmable Filters

Features

♦ Wiper Position Stored in Nonvolatile Memory and

Recalled Upon Power-Up

♦ Tiny SOT23 Package

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

Coefficient

♦ 5ppm/°C Ratiometric Temperature Coefficient

♦ 32 Tap Positions

♦ Voltage-Divider or Variable-Resistor

Potentiometer Configuration

♦ 50kΩ and 100kΩ End-to-End Resistance Values

♦ 1µA (max) Static Supply Current

♦ 2.7V to 5.25V Single-Supply Operation

♦ 200,000 Wiper Store Cycles

♦ 50-Year Wiper Data Retention

MAX5471/MAX5472/MAX5474/MAX5475

32-Tap, Nonvolatile, Linear-Taper Digital

Potentiometers in SOT23

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

19-3067; Rev 1; 2/06

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.

EVALUATION KIT

AVAILABLE

PART

TEMP

RANGE

PIN-PACKAGE

PKG

CODE

M A X5 4 7 1 E Z T- T- 40° C to + 85° C 6 Thin SOT23-6 Z6-1

M A X5 4 7 2 E Z T- T- 40° C to + 85° C 6 Thin SOT23-6 Z6-1

M A X5 4 7 4 E KA- T- 40° C to + 85° C 8 SOT23-8 K8S-3

M A X5 4 7 5 E KA- T- 40° C to + 85° C 8 SOT23-8 K8S-3

TOP VIEW

GND

INC

GND

SOT23-6

SOT23-8

U/D

MAX5471

MAX5472

MAX5474

MAX5475

INC

Pin Configurations

PART

END-TO-END

RESISTANCE (kΩ)

TOP MARK

MAX5471EZT 50 ABQN

MAX5472EZT 100 ABQM

MAX5474EKA 50 AEIZ

MAX5475EKA 100 AEIY

Selector Guide

Summary of content (12 pages)

PAGE 1
KIT ATION EVALU E L B A IL AVA 19-3067; Rev 1; 2/06 32-Tap, Nonvolatile, Linear-Taper Digital Potentiometers in SOT23 The MAX5471/MAX5472/MAX5474/MAX5475 lineartaper digital potentiometers function as mechanical potentiometers, but replace the mechanics with a simple 3-wire up/down digital interface. These digital potentiometers feature nonvolatile memory (EEPROM) to return the wiper to its previously stored position upon power-up.
PAGE 2
MAX5471/MAX5472/MAX5474/MAX5475 32-Tap, Nonvolatile, Linear-Taper Digital Potentiometers in SOT23 ABSOLUTE MAXIMUM RATINGS VDD to GND ...........................................................-0.3V to +6.0V All Other Pins to GND .........-0.3V to the lower of (VDD + 0.3V) or +6.0V Maximum Continuous Current into H, L, and W MAX5471/MAX5474 .....................................................±1.3mA MAX5472/MAX5475 .....................................................±0.
PAGE 3
2-Tap, Nonvolatile, Linear-Taper Digital Potentiometers in SOT23 (VDD = +2.7V to +5.25V, VH = VDD, VL = GND, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VDD = +5.0V, TA = +25°C, unless otherwise noted.
PAGE 4
Typical Operating Characteristics (VDD = 5.0V, TA = +25°C, unless otherwise noted.) STATIC SUPPLY CURRENT vs. TEMPERATURE 0.3 0.2 0.1 VDD = 5.0V 0.3 0.2 VDD = 3.0V 3.1 3.5 3.9 4.3 4.7 5.1 5.5 10 VDD = 3.0V 0.1 -40 -15 10 35 60 85 0 1 2 3 4 5 TEMPERATURE (°C) DIGITAL INPUT VOLTAGE (V) WIPER RESISTANCE vs. TAP POSITION (MAX5474) WIPER RESISTANCE vs. TAP POSITION (MAX5475) END-TO-END RESISTANCE % CHANGE vs. TEMPERATURE 400 VDD = 3.0V 350 VDD = 5.0V 250 500 450 VDD = 5.
PAGE 5
32-Tap, Nonvolatile, Linear-Taper Digital Potentiometers in SOT23 WIPER TRANSIENT AT POWER-ON (MAX5475) VDD W W 1V/div 1V/div CL = 10pF TAP 16 VH = VDD CL = 10pF TAP 16 VH = VDD MAX5474 -6 -9 MAX5475 -12 -15 -18 1 1.0μs/div 1.0μs/div TAP = 16 CL = 10pF -3 WIPER RESPONSE (dB) 5V/div 5V/div MAX5471toc12 VDD WIPER RESPONSE vs. FREQUENCY 0 MAX5471 toc11 MAX5471 toc10 WIPER TRANSIENT AT POWER-ON (MAX5474) 10 100 1000 FREQUENCY (kHz) RESISTANCE INL vs.
PAGE 6
Typical Operating Characteristics (continued) (VDD = 5.0V, TA = +25°C, unless otherwise noted.) RESISTANCE DNL vs. TAP POSITION (MAX5475) RESISTANCE INL vs. TAP POSITION (MAX5475) VOLTAGE-DIVIDER MODE 0.03 MAX5471 toc20 0.04 MAX5471 toc19 0.04 VOLTAGE-DIVIDER MODE 0.03 0.02 0.02 RESISTANCE INL RESISTANCE DNL MAX5471/MAX5472/MAX5474/MAX5475 32-Tap, Nonvolatile, Linear-Taper Digital Potentiometers in SOT23 0.01 0 -0.01 0.01 0 -0.01 -0.02 -0.02 -0.03 -0.03 -0.04 -0.
PAGE 7
32-Tap, Nonvolatile, Linear-Taper Digital Potentiometers in SOT23 WIPER POSITION NOT STORED CS tCYC tCI tIC tIH tIL tCPH tIK INC tID tDI tWSC U/D tIW VW NOTE: VW IS NOT A DIGITAL SIGNAL. IT REPRESENTS A WIPER TRANSITION. Figure 1. Digital Interface and Timing Diagram Detailed Description The MAX5471/MAX5472/MAX5474/MAX5475 contain a resistor array with 31 resistive elements (Figures 2 and 3).
PAGE 8
MAX5471/MAX5472/MAX5474/MAX5475 32-Tap, Nonvolatile, Linear-Taper Digital Potentiometers in SOT23 Applications Information Truth Table CS U/D INC W L L ↓ Decrement L H ↓ Increment L X ↑ No change H X X No change ↓ X X No change ↑ X L Position not stored ↑ X H Position stored ↓ = High-to-low transition. ↑ = Low-to-high transition. X = Don’t care.
PAGE 9
32-Tap, Nonvolatile, Linear-Taper Digital Potentiometers in SOT23 VIN H 30V H VOUT W VOUT R3 MAX5474 MAX5475 R1 MAX5471 MAX5472 L H GND R2 Figure 4. Positive LCD Bias Control Using a Voltage-Divider MAX5471 MAX5472 GND 5V 30V Figure 6. Programmable Filter VOUT H MAX5471 MAX5472 GND Chip Information TRANSISTOR COUNT: 5031 PROCESS: BiCMOS Figure 5.
PAGE 10
Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) 6L THIN SOT23.
PAGE 11
32-Tap, Nonvolatile, Linear-Taper Digital Potentiometers in SOT23 ______________________________________________________________________________________ 11 MAX5471/MAX5472/MAX5474/MAX5475 Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.
PAGE 12
Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) SOT23, 8L.EPS MAX5471/MAX5472/MAX5474/MAX5475 32-Tap, Nonvolatile, Linear-Taper Digital Potentiometers in SOT23 MARKING 0 0 PACKAGE OUTLINE, SOT-23, 8L BODY 21-0078 G 1 1 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product.