Datasheet

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

General Description

The MAX5432–MAX5435 nonvolatile, linear-taper, digi-

tal potentiometers perform the function of a mechanical

potentiometer, but replace the mechanics with a simple

2-wire serial interface. Each device performs the same

function as a discrete potentiometer or a variable resis-

tor and has 32 tap points.

The MAX5432–MAX5435 feature an internal, nonvolatile,

electrically erasable programmable read-only memory

(EEPROM) that returns the wiper to its previously stored

position at power-up. The fast-mode I

C-compatible

serial interface allows communication at data rates up to

400kbps, minimizing board space and reducing inter-

connection complexity. Each device is available with

multiple factory-preset I

C addresses (see the Ordering

Information/Selector Guide).

Use the MAX5432–MAX5435 in applications requiring

digitally controlled resistors. Two resistance values are

available (50kΩ and 100kΩ) in a voltage-divider or vari-

able resistor configuration. The nominal resistor temper-

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

5ppm/°C ratiometric, making the devices ideal for

applications requiring a low-temperature-coefficient

variable resistor such as low-drift, programmable-gain

amplifier circuit configurations.

The MAX5432/MAX5433 are available in a 3mm x 3mm

8-pin TDFN package and the MAX5434/MAX5435 are

available in a 6-pin thin SOT23 package. The MAX5432–

MAX5435 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) Screen Adjustment

Features

♦ Tiny 3mm x 3mm 8-Pin TDFN and 6-Pin Thin

SOT23 Packages

♦ Power-On Recall of Wiper Position from

Nonvolatile Memory

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

Coefficient

♦ 5ppm/°C Ratiometric Temperature Coefficient

♦ 50kΩ/100kΩ Resistor Values

♦ Fast 400kbps I

C-Compatible Serial Interface

♦ 500nA (typ) Static Supply Current

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

♦ 32 Tap Positions

♦ ±0.15 LSB INL (typ), ±0.15 LSB DNL (typ)

MAX5432–MAX5435

32-Tap, Nonvolatile, I

C, Linear, Digital

Potentiometers

________________________________________________________________ Maxim Integrated Products 1

Ordering Information/Selector Guide

19-3511; Rev 3; 11/07

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

EVALUATION KIT

AVAILABLE

PART PIN-PACKAGE TOP MARK I

C ADDRESS R (kΩΩ

ΩΩ

) PKG CODE

MAX5432LETA+ 8 TDFN-EP* ANG 010100A

** 50 T833-1

MAX5432META+ 8 TDFN-EP* ANI 010110A

** 50 T833-1

MAX5433LETA+ 8 TDFN-EP* ANF 010100A

** 100 T833-1

MAX5433META+ 8 TDFN-EP* ANH 010110A

** 100 T833-1

MAX5434LEZT+T 6 Thin SOT23-6 AABX 0101000 50 Z6-1

*EP = Exposed pad.

**A

represents the logic state of input A0 of the device in the TDFN package.

+Denotes a lead-free package.

T = Tape and reel.

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

TDFN

TOP VIEW

GND

SDASCL

16L

SOT23

MAX5434

MAX5435

SCL

LSDA

GND

MAX5432

MAX5433

Pin Configurations

Ordering Information/Selector Guide continued at end of data sheet.

Summary of content (19 pages)

PAGE 1
9-3511; Rev 3; 11/07 KIT ATION EVALU LE B A IL A AV 32-Tap, Nonvolatile, I2C, Linear, Digital Potentiometers The MAX5432–MAX5435 nonvolatile, linear-taper, digital potentiometers perform the function of a mechanical potentiometer, but replace the mechanics with a simple 2-wire serial interface. Each device performs the same function as a discrete potentiometer or a variable resistor and has 32 tap points.
PAGE 2
MAX5432–MAX5435 32-Tap, Nonvolatile, I2C, Linear, Digital Potentiometers ABSOLUTE MAXIMUM RATINGS VDD to GND ...........................................................-0.3V to +6.0V SDA, SCL to GND..................................................-0.3V to +6.0V A0, H, L, and W to GND .............................-0.3V to (VDD + 0.3V) Maximum Continuous Current into H, L, and W MAX5432/MAX5434.....................................................±1.3mA MAX5433/MAX5435........................................
PAGE 3
2-Tap, Nonvolatile, I2C, Linear, Digital Potentiometers (VDD = +2.7V to +5.25V, VH = VDD, VL = GND, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VDD = +5V, TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DYNAMIC CHARACTERISTICS -3dB Bandwidth (Note 8) Wiper Settling Time (Note 9) MAX5432/MAX5434 500 MAX5433/MAX5435 250 MAX5432/MAX5434 0.5 MAX5433/MAX5435 1.
PAGE 4
TIMING CHARACTERISTICS (continued) (VDD = +2.7V to +5.25V, VH = VDD, VL = GND, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VDD = +5V, TA = +25°C.) (Figures 1 and 2) (Note 1) Note 2: The DNL and INL are measured with the potentiometer configured as a variable resistor. For the 3-terminal potentiometers (MAX5432/MAX5433), H is unconnected and L = GND. At VDD = 5V, W is driven with a source current of 80µA for the 50kΩ configuration, and 40µA for the 100kΩ configuration.
PAGE 5
32-Tap, Nonvolatile, I2C, Linear, Digital Potentiometers END-TO-END RESISTANCE % CHANGE vs. TEMPERATURE 0.5 0 -0.5 MAX5432–35 toc06 1.0 MAX5432-35 toc05 50kΩ 100kΩ END-TO-END RESISTANCE % CHANGE MAX5432–35 toc04 1.0 END-TO-END RESISTANCE CHANGE ( %) TAP-TO-TAP SWITCHING TRANSIENT (0 TO MIDSCALE, CL = 10pF) END-TO-END RESISTANCE % CHANGE vs. TEMPERATURE 0.5 SDA 2V/div 0 VW 1V/div -0.5 50kΩ -1.0 -40 -15 10 35 60 -1.
PAGE 6
Typical Operating Characteristics (continued) (VDD = +5V, TA = +25°C, unless otherwise noted.) WIPER RESISTANCE vs. TAP POSITION (MAX5432) 400 300 300 500 400 300 200 200 200 100 100 100 0 0 8 12 16 20 24 0 28 31 4 8 16 20 24 28 0 31 0 30 0.5 VARIABLE-RESISTOR MODE MAX5432/MAX5434 0.4 0.3 RESISTANCE DNL (LSB) MAX5432–35 toc16 100kΩ 60 50 40 0.2 0.1 0 -0.1 -0.2 0.1 0 -0.1 -0.2 -0.4 0 16 20 TAP POSITION 24 28 31 28 31 0.2 -0.5 12 24 0.
PAGE 7
32-Tap, Nonvolatile, I2C, Linear, Digital Potentiometers 0.1 0 -0.1 -0.2 0.2 0.1 0 -0.1 -0.2 0.2 0.1 0 -0.1 -0.2 -0.3 -0.3 -0.4 -0.4 -0.4 -0.5 -0.5 4 8 12 16 20 24 28 31 -0.5 0 4 8 TAP POSITION RESISTANCE INL vs. TAP POSITION 16 20 24 28 31 0 0.1 0 -0.1 -0.2 VOLTAGE-DIVIDER MODE MAX5433 0.4 0.3 0.2 0.1 0 -0.1 -0.2 0 -0.1 -0.2 -0.4 -0.5 20 TAP POSITION 24 28 31 28 31 0.1 -0.3 16 24 0.2 -0.4 12 20 0.3 -0.4 8 16 VOLTAGE-DIVIDER MODE MAX5433 0.4 -0.3 -0.
PAGE 8
32-Tap, Nonvolatile, I2C, Linear, Digital Potentiometers MAX5432–MAX5435 Pin Description PIN FUNCTION NAME TDFN THIN SOT23 1 — H 2 4 SDA 3 2 GND Ground 4 3 SCL I2C-Compatible Interface Clock Input 5 1 VDD Power-Supply Input. Bypass with a 0.1µF capacitor from VDD to GND. 6 — A0 7 6 L Low Terminal 8 5 W Wiper Terminal EP — EP Exposed Pad. Internally connected to GND. High Terminal I2C-Compatible Interface Data Input Address Input. Sets the I2C address.
PAGE 9
32-Tap, Nonvolatile, I2C, Linear, Digital Potentiometers MAX5432–MAX5435 tF tR SDA tSU-DAT tHD-DAT tLOW tBUF tHD-STA tSU-STA tSU-STO SCL tHIGH tHD-STA tR tF S Sr A P S PARAMETERS ARE MEASURED FROM 30% TO 70%. Figure 1. I2C Serial-Interface Timing Diagram high while SCL is high. The bus is then free for another transmission (Figure 3). Bit Transfer One data bit is transferred during each clock pulse. The data on the SDA line must remain stable while SCL is high (Figure 5).
PAGE 10
VDD IOL = 3mA SDA VOUT SDA SCL 400pF IOH = 0mA Figure 2. Load Circuit SDA S P START CONDITION STOP CONDITION Figure 3. Start and Stop Conditions 0 1 0 1 0* 0* A0 MSB NOP/W ACK LSB SCL *SEE THE Ordering Information/Selector Guide FOR OTHER ADDRESS OPTIONS. Figure 4. Slave Address Command Byte Use the command byte to select the destination of the wiper data (nonvolatile or volatile memory registers) and swap data between nonvolatile and volatile memory registers (see Table 2).
PAGE 11
32-Tap, Nonvolatile, I2C, Linear, Digital Potentiometers SDA MAX5432–MAX5435 CLOCK PULSE FOR ACKNOWLEDGMENT START CONDITION SCL 1 2 8 9 NOT ACKNOWLEDGE SCL DATA STABLE, DATA VALID SDA CHANGE OF DATA ALLOWED ACKNOWLEDGE Figure 6. Acknowledge Figure 5. Bit Transfer COMMAND BYTE IS STORED ON RECEIPT OF STOP CONDITION SLAVE ADDRESS S D15 ACKNOWLEDGE FROM MAX5432–MAX5435 0 D14 D13 A D11 D12 D10 D9 D8 A COMMAND BYTE P ACKNOWLEDGE FROM MAX5432–MAX5435 NOP/W Figure 7.
PAGE 12
MAX5432–MAX5435 32-Tap, Nonvolatile, I2C, Linear, Digital Potentiometers 5V 5V H 30V 30V W MAX5432 MAX5433 VOUT L VOUT H MAX5432– MAX5435 W L Figure 9. Positive LCD Bias Control Using a Voltage-Divider Figure 10. Positive LCD Bias Control Using a Variable Resistor +5V W VIN L H VIN R3 C VOUT V0 REF OUT H R1 MAX6160 R1 ADJ W GND H MAX5432– MAX5435 R2 W L MAX5432 MAX5433 R2 L V0 = 1.23V 50kΩ FOR THE MAX5432 R2(kΩ) V0 = 1.23V 100kΩ FOR THE MAX5433 R2(kΩ) Figure 12.
PAGE 13
32-Tap, Nonvolatile, I2C, Linear, Digital Potentiometers H VDD GND SDA SCL 5-BIT SHIFT REGISTER 5-BIT LATCH 5 5 32POSITION DECODER 32 W L POR I2C INTERFACE 5-BIT NV MEMORY MAX5432 MAX5433 A0 MAX5434/MAX5435 Functional Diagram VDD GND SDA SCL 5-BIT SHIFT REGISTER I2C INTERFACE 5-BIT LATCH 5 5 32POSITION DECODER 32 W L POR 5-BIT NV MEMORY MAX5434 MAX5435 ______________________________________________________________________________________ 13 MAX5432–MAX5435 MAX5432/MAX5433 F
PAGE 14
MAX5432–MAX5435 32-Tap, Nonvolatile, I2C, Linear, Digital Potentiometers Ordering Information/Selector Guide (continued) PART MAX5434MEZT+T PIN-PACKAGE TOP MARK I2C ADDRESS Ω) R (kΩ PKG CODE 6 Thin SOT23-6 AABY 0101100 50 Z6-1 Z6-1 MAX5434NEZT+T 6 Thin SOT23-6 AABS 0101010 50 MAX5435LEZT+T 6 Thin SOT23-6 AABW 0101000 100 Z6-1 MAX5435MEZT+T 6 Thin SOT23-6 AABV 0101100 100 Z6-1 *EP = Exposed pad. **A0 represents the logic state of input A0 of the device in the TDFN package.
PAGE 15
32-Tap, Nonvolatile, I2C, Linear, Digital Potentiometers 6, 8, &10L, DFN THIN.EPS ______________________________________________________________________________________ 15 MAX5432–MAX5435 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.
PAGE 16
MAX5432–MAX5435 32-Tap, Nonvolatile, I2C, Linear, Digital Potentiometers 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.) 16 COMMON DIMENSIONS PACKAGE VARIATIONS SYMBOL MIN. MAX. PKG. CODE N D2 E2 e JEDEC SPEC b [(N/2)-1] x e A 0.70 0.80 T633-2 6 1.50±0.10 2.30±0.10 0.95 BSC MO229 / WEEA 0.40±0.05 1.90 REF D 2.90 3.
PAGE 17
32-Tap, Nonvolatile, I2C, Linear, Digital Potentiometers 6L THIN SOT23.EPS ______________________________________________________________________________________ 17 MAX5432–MAX5435 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 18
MAX5432–MAX5435 32-Tap, Nonvolatile, I2C, Linear, Digital Potentiometers 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 19
32-Tap, Nonvolatile, I2C, Linear, Digital Potentiometers REVISION NUMBER REVISION DATE 3 11/07 DESCRIPTION Eliminated address options, added lead-free option, updated information in Table 1b PAGES CHANGED 1, 9, 14 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.