Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsData collecting ICsData acquisition IC - Digital potentiometer linear Permanent TQFN 16

AVAILABLE

Functional Diagrams

Pin Configurations appear at end of data sheet.

Functional Diagrams continued at end of data sheet.

UCSP is a trademark of Maxim Integrated Products, Inc.

For pricing, delivery, and

ordering information, please contact Maxim Direct

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

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

10-Bit, Nonvolatile, Linear-Taper Digital

Potentiometers

Ordering Information

N.C.

GND

101112

SPI/UD

DIN(U/D)

SCLK(INC)

4321

N.C.

**EP

*EP

N.C.

INTERFACE

TOP VIEW

TQFN

*SEE FUNCTIONAL DIAGRAM

**CONNECT EXPOSED PAD TO V

*CONNECT EXPOSED PAD TO V

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

PART PIN-PACKAGE TOP MARK

MAX5481ETE+ 16 TQFN-EP* ACP

MAX5481EUD+ 14 TSSOP —

Selector Guide appears at end of data sheet.

SPI is a trademark of Motorola, Inc.

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

temperature range.

Denotes a lead(Pb)-free/RoHS-compliant package.

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

MAX5481–MAX5484

19-3708; Rev 5; 4/10

Summary of content (20 pages)

PAGE 1
MAX5481–MAX5484 LE AVAILAB 10-Bit, Nonvolatile, Linear-Taper Digital Potentiometers General Description CS SCLK(INC) DIN(U/D) SPI/UD Pin Configurations 12 11 10 9 TOP VIEW N.C. 15 VSS 16 + INTERFACE MAX5481* MAX5482* **EP 1 2 PART PIN-PACKAGE MAX5481ETE+ 16 TQFN-EP* MAX5481EUD+ 14 TSSOP TOP MARK ACP — Note: All devices are specified over the -40°C to +85°C operating temperature range. +Denotes a lead(Pb)-free/RoHS-compliant Pin Configurations appear at end of data package.
PAGE 2
MAX5481–MAX5484 10-Bit, Nonvolatile, Linear-Taper Digital Potentiometers ABSOLUTE MAXIMUM RATINGS VDD to GND ...........................................................-0.3V to +6.0V VSS to GND............................................................-3.5V to +0.3V VDD to VSS .............................................................-0.3V to +6.0V H, L, W to VSS ..................................(VSS - 0.3V) to (VDD + 0.3V) CS, SCLK(INC), DIN(U/D), SPI/UD to GND ..-0.3V to (VDD + 0.
PAGE 3
MAX5481–MAX5484 10-Bit, Nonvolatile, Linear-Taper Digital Potentiometers ELECTRICAL CHARACTERISTICS (continued) (VDD = +2.7V to +5.25V, VSS = VGND = 0V, VH = VDD, VL = 0V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VDD = +5.0V, TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER Full-Scale Wiper-to-End Resistance SYMBOL RW-L CONDITIONS MIN TYP MAX UNITS MAX5483 7.5 10 12.5 kΩ MAX5484 37.5 50 70 110 50 60 62.
PAGE 4
MAX5481–MAX5484 10-Bit, Nonvolatile, Linear-Taper Digital Potentiometers TIMING CHARACTERISTICS (VDD = +2.7V to +5.25V, VSS = VGND = 0V, VH = VDD, VL = 0V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VDD = +5.0V, TA = +25°C, unless otherwise noted.
PAGE 5
MAX5481–MAX5484 10-Bit, Nonvolatile, Linear-Taper Digital Potentiometers Typical Operating Characteristics (VDD = 5.0V, VSS = 0V, TA = +25°C, unless otherwise noted.) 0.2 0 0 -0.2 -0.4 -0.4 -0.6 -0.6 -0.8 -0.8 -1.0 1.0 128 256 384 512 640 768 896 1024 -1.0 -1.5 -2.0 0 CODE 0 128 256 384 512 640 768 896 1024 MAX5481 toc04 VDD = 3V DNL vs. CODE (MAX5481) INL vs. CODE (MAX5483) 2.0 VDD = 5V 1.5 1.0 1.0 0.5 0.5 1.0 MAX5481 toc05 INL vs.
PAGE 6
MAX5481–MAX5484 10-Bit, Nonvolatile, Linear-Taper Digital Potentiometers Typical Operating Characteristics (continued) (VDD = 5.0V, VSS = 0V, TA = +25°C, unless otherwise noted.) 0.6 0.2 0.2 0 -0.2 -0.4 -0.4 -0.4 -0.6 -0.6 -0.6 -0.8 -0.8 -0.8 -1.0 -1.0 128 256 384 512 640 768 896 1024 -1.0 0 0.6 DNL vs. CODE (MAX5482) DNL vs. CODE (MAX5482) 1.0 MAX5481 toc13 VDD = 5V VDD = 2.7V 0.8 0.6 1.0 0.6 0.2 0.2 -0.2 DNL (LSB) 0.4 0.2 DNL (LSB) 0.4 0 -0.2 0 -0.2 -0.4 -0.4 -0.
PAGE 7
MAX5481–MAX5484 10-Bit, Nonvolatile, Linear-Taper Digital Potentiometers Typical Operating Characteristics (continued) (VDD = 5.0V, VSS = 0V, TA = +25°C, unless otherwise noted.) 50 40 30 20 20 10 10 0 128 256 384 512 640 768 896 1024 10 0 0 128 256 384 512 640 768 896 1024 0 128 256 384 512 640 768 896 1024 CODE CODE W-TO-L RESISTANCE vs. CODE (MAX5483) WIPER RESISTANCE vs. WIPER VOLTAGE (VARIABLE RESISTOR) END-TO-END (RHL) % CHANGE vs. TEMPERATURE (VOLTAGE-DIVIDER) 21.5 21.0 10 20.
PAGE 8
MAX5481–MAX5484 10-Bit, Nonvolatile, Linear-Taper Digital Potentiometers Typical Operating Characteristics (continued) (Circuit of Figure 1, TA = +25°C, unless otherwise noted.
PAGE 9
MAX5481–MAX5484 10-Bit, Nonvolatile, Linear-Taper Digital Potentiometers Pin Description (MAX5481/MAX5482 Voltage-Dividers) PIN NAME FUNCTION TQFN TSSOP 1 12 H High Terminal 2 11 W Wiper Terminal 3 10 L Low Terminal 4–7, 15 7, 8, 9, 13 N.C. No Connection. Not internally connected. Negative Power-Supply Input. For single-supply operation, connect VSS to GND. For dualsupply operation, -2.5V ≤ VSS ≤ -0.2V as long as (VDD - VSS) ≤ +5.25V. Bypass VSS to GND with a 0.
PAGE 10
MAX5481–MAX5484 10-Bit, Nonvolatile, Linear-Taper Digital Potentiometers Pin Description (continued) (MAX5483/MAX5484 Variable Resistors) PIN NAME FUNCTION TQFN TSSOP 4–7, 15 7, 8, 9, 13 N.C. 1 12 D.N.C. 2 11 W Wiper Terminal 3 10 L Low Terminal 8, 16 14 VSS Negative Power-Supply Input. For single-supply operation, connect VSS to GND. For dualsupply operation, -2.5V ≤ VSS ≤ -0.2V as long as (VDD - VSS) ≤ 5.25V. Bypass VSS to GND with a 0.
PAGE 11
MAX5481–MAX5484 10-Bit, Nonvolatile, Linear-Taper Digital Potentiometers Functional Diagrams H VDD GND VSS 10-BIT NV MEMORY 10-BIT LATCH 10 10 DECODER W CS POR SCLK(INC) SPI INTERFACE DIN(U/D) L MUX UP/DOWN INTERFACE SPI/UD MAX5481 MAX5482 NOTE: THE MAX5481/MAX5482 ARE NOT INTENDED FOR CURRENT TO FLOW THROUGH THE WIPER (SEE THE MAX5481/MAX5482 PROGRAMMABLE VOLTAGE-DIVIDER SECTION).
PAGE 12
MAX5481–MAX5484 10-Bit, Nonvolatile, Linear-Taper Digital Potentiometers Functional Diagrams (continued) VDD GND VSS 10-BIT NV MEMORY 10 10-BIT LATCH 10 DECODER H L CS POR SCLK(INC) SPI INTERFACE DIN(U/D) MUX UP/DOWN INTERFACE SPI/UD MAX5483 MAX5484 Detailed Description The MAX5481/MAX5482 linear programmable voltagedividers and the MAX5483/MAX5484 variable resistors feature 1024 tap points (10-bit resolution) (see the Functional Diagrams).
PAGE 13
MAX5481–MAX5484 18 18 16 16 14 14 12 12 RW-L (kΩ) RW-H (kΩ) 10-Bit, Nonvolatile, Linear-Taper Digital Potentiometers 10 8 10 8 6 6 4 4 2 2 0 0 0 0 128 256 384 512 640 768 896 1024 128 256 384 512 640 768 896 1024 CODE (DECIMAL) 50kΩ DEVICE SCALES BY A FACTOR OF FIVE CODE (DECIMAL) 50kΩ DEVICE SCALES BY A FACTOR OF FIVE Figure 1. Resistance from W to H vs. Code (10kΩ Voltage-Divider) Figure 2. Resistance from W to L vs.
PAGE 14
MAX5481–MAX5484 10-Bit, Nonvolatile, Linear-Taper Digital Potentiometers Table 2.
PAGE 15
MAX5481–MAX5484 10-Bit, Nonvolatile, Linear-Taper Digital Potentiometers a) 24-BIT COMMAND/DATA WORD CS SCLK(INC) 1 2 3 4 5 6 7 8 C1 C0 DIN(U/D) 9 10 11 12 13 14 15 16 17 18 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 19 23 24 19 20 21 22 23 20 21 22 b) 8-BIT COMMAND WORD CS SCLK(INC) 1 2 3 4 5 6 7 8 C1 C0 DIN(U/D) Figure 4.
PAGE 16
MAX5481–MAX5484 10-Bit, Nonvolatile, Linear-Taper Digital Potentiometers Table 3. Truth Table CS DIN(U/D) SCLK(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 CS 1 2 3 4 5 6 7 8 SCLK(INC) DIN(U/D) 0 0 C1 C0 1 0 0 0 0 0 tBUSY ↑ = Low-to-high transition. WRITE NV REGISTER (DEVICE IS BUSY) ↓ = High-to-low transition. ACTION X = Don’t care.
PAGE 17
MAX5481–MAX5484 10-Bit, Nonvolatile, Linear-Taper Digital Potentiometers Applications Information Standby Mode The MAX5481–MAX5484 feature a low-power standby mode. When the device is not being programmed, it enters into standby mode and supply current drops to 0.5µA (typ).
PAGE 18
MAX5481–MAX5484 10-Bit, Nonvolatile, Linear-Taper Digital Potentiometers VREF 5V H H 30V MAX5481 MAX5482 MAX5481 MAX5482 W MAX480 W VOUT VOUT L L MAX5483 MAX5484 W L VIN Figure 9. Positive LCD Bias Control Using a Voltage-Divider Figure 11. Programmable Gain/Offset Adjustment C 5V VIN VOUT 30V MAX480 VOUT R3 MAX5483 MAX5484 W R1 L MAX5483 MAX5484 W MAX5483 MAX5484 L R2 W L Figure 10.
PAGE 19
MAX5481–MAX5484 10-Bit, Nonvolatile, Linear-Taper Digital Potentiometers Selector Guide PART CONFIGURATION Ordering Information (continued) PART PIN-PACKAGE END-TO-END RESISTANCE (kΩ) MAX5482ETE+ 16 TQFN-EP* MAX5481ETE Voltage-divider 10 MAX5482EUD+ 14 TSSOP MAX5481EUD Voltage-divider 10 MAX5483ETE+ 16 TQFN-EP* MAX5482ETE Voltage-divider 50 MAX5483EUD+ 14 TSSOP TOP MARK ACQ — ACR — MAX5482EUD Voltage-divider 50 MAX5484ETE+ 16 TQFN-EP* MAX5483ETE Variable resistor 10 MAX5484EUD
PAGE 20
MAX5481–MAX5484 10-Bit, Nonvolatile, Linear-Taper Digital Potentiometers Revision History REVISION NUMBER REVISION DATE 3 12/07 Updated Table 3 4 4/10 Updated Ordering Information, Absolute Maximum Ratings, and Figure 8 DESCRIPTION PAGES CHANGED 16 1, 2, 17 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.