DS3503 Datasheet | Maxim Integrated

Description The DS3503 Features two synchronized stepping digital potentiometers: one 7-bit potentiometer with RW as its output, and another potentiometer with Y as its output. Both potentiometers reference the RH and RL terminals and feature an output voltage range of up to 15.5V. In addition, both potentiometer outputs can be stepped up and down by configuring the control registers. Programming is acplished by an I2C-patible interface that can operate at speeds of up to 400k Hz. Features - 128 Wiper Tap Points - Full-Scale Resistance: 5kΩ - Programmable Logic Lets WR Step Up and Down with Timing Controlled by SYNC Input - Second Potentiometer Output Pin (Y) Centered at Position 40h - I2C-patible Serial Interface - Digital Operating Voltage: 2.7V to 3.6V - Analog Operating Voltage: 4.5V to 15.5V - Operating Temperature: -40°C to +100°C - 10-Pin µSOP Package Applications TFT-LCD V Calibration Instrumentation and Industrial Controls Mechanical Potentiometer Replacement Pin Configuration TOP VIEW SDA GND VCC SYNC Y 1 2 3 4 5 DS3503 10 9 8 7 6 SCL V+ RL RW RH Ordering Information PART DS3503U+ DS3503U+T&R TEMP RANGE -40°C to +100°C -40°C to +100°C PIN-PACKAGE 10 μSOP 10 μSOP +Denotes a lead(Pb)-free/Ro HS-pliant package. T&R = Tape and reel. Typical Operating Circuit appears at end of data sheet. μSOP Functional Diagram WR+STEPCOUNT I2C WR BUS IVR EEPROM ADDRESS I2C RD BUS COUNT V+ VCC GND PERIOD (2 BITS) STEP COUNT (2 BITS) SYNC STEP CONTROL REGISTER STEP COUNTER AND CONTROL LOGIC MUX I O WR REGISTER ADDRESS RH 1 LSB WR 7-BIT POT RW PERIOD RL RH 1 LSB CODE 64 (40h) 7-BIT POT Y CODE 64 (40h) SCL SDA SCL SDA OUT I2C LOGIC WR-STEPCOUNT CODE 64 (40h) + STEPCOUNT PERIOD CODE 64 (40h) -...