MAX5432 Datasheet, PDF (1/17 Pages) Maxim Integrated Products – 32-Tap, Nonvolatile, I2C, Linear, Digital Potentiometers

19-3511; Rev 1; 12/04
32-Tap, Nonvolatile, I²C, Linear, Digital
Potentiometers
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 I²C^†-compatible
serial interface allows communication at data rates up to
400kbps, minimizing board space and reducing inter-
connection complexity. Each device is available with
one of four factory-preset I²C addresses (see the
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 avail-
able 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 I²C-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)
Ordering Information
PART
MAX5432LETA
MAX5432META*
MAX5433LETA
MAX5433META*
MAX5434LEZT-T
MAX5434MEZT-T*
MAX5434NEZT-T*
MAX5434PEZT-T*
MAX5435LEZT-T
MAX5435MEZT-T*
MAX5435NEZT-T*
MAX5435PEZT-T*
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
6 Thin SOT23-6
6 Thin SOT23-6
6 Thin SOT23-6
6 Thin SOT23-6
6 Thin SOT23-6
6 Thin SOT23-6
6 Thin SOT23-6
6 Thin SOT23-6
*Future product—contact factory for availability.
**EP = Exposed pad.
Selector Guide appears at end of data sheet.
TOP VIEW
Pin Configurations
†_{Purchase of I}2_{C components from Maxim Integrated Products,}
Inc., or one of its sublicensed Associated Companies, conveys
a license under the Philips I²C Patent Rights to use these com-
ponents in an I²C system, provided that the system conforms
to the I²C Standard Specification as defined by Philips.
H1
SDA 2
GND 3
SCL 4
MAX5432
MAX5433
TDFN
8 W _{VDD 1}
7 L _{GND 2}
6 A0 _{SCL 3}
5 V_DD
6L
5W
MAX5434
MAX5435
SOT23
4 SDA
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