DS3503 Rev 1 3/09 2 NV, I C, Stepper Potentiometer General Description Features The DS3503 features two synchronized stepping digital 128 Wiper Tap Points potentiometers: one 7-bit potentiometer with RW as its Full-Scale Resistance: 5k output, and another potentiometer with Y as its output. Programmable Logic Lets WR Step Up and Down Both potentiometers reference the RH and RL terminals with Timing Controlled by SYNC Input and feature an output voltage range of up to 15.5V. In addition, both potentiometer outputs can be stepped Second Potentiometer Output Pin (Y) Centered at up and down by configuring the control registers. Position 40h 2 Programming is accomplished by an I C-compatible 2 I C-Compatible Serial Interface interface that can operate at speeds of up to 400kHz. Digital Operating Voltage: 2.7V to 3.6V Analog Operating Voltage: 4.5V to 15.5V Applications Operating Temperature: -40C to +100C TFT-LCD V Calibration COM 10-Pin SOP Package Instrumentation and Industrial Controls Mechanical Potentiometer Replacement Pin Configuration Ordering Information TOP VIEW PART TEMP RANGE PIN-PACKAGE SDA 1 10 SCL DS3503U+ -40C to +100C 10 SOP GND29V+ DS3503U+T&R -40C to +100C 10 SOP DS3503 V38 RL CC +Denotes a lead(Pb)-free/RoHS-compliant package. SYNC47RW T&R = Tape and reel. Y5 6 RH Typical Operating Circuit appears at end of data sheet. SOP Functional Diagram WR+STEPCOUNT RH 2 I C WR BUS 1 LSB WR MUX I IVR 7-BIT SCL SCL O RW OUT EEPROM POT WR SDA SDA ADDRESS REGISTER PERIOD ADDRESS 2 WR-STEPCOUNT I C 2 I C RD BUS RL LOGIC CODE 64 (40h) + STEPCOUNT RH COUNT V+ 1 LSB STEP CONTROL CODE 64 V CC REGISTER (40h) CODE 64 7-BIT GND Y STEP (40h) POT COUNTER PERIOD (2 BITS) AND STEP COUNT (2 BITS) CONTROL CODE 64 (40h) - STEPCOUNT PERIOD LOGIC RL DS3503 SYNC Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.2 NV, I C, Stepper Potentiometer ABSOLUTE MAXIMUM RATINGS Voltage Range on V Relative to GND ...............-0.5V to +6.0V Operating Temperature Range .........................-40C to +100C CC Voltage Range on V+ Relative to GND ..................-0.5V to +17V Programming Temperature Range .........................0C to +70C Voltage Range on SDA, SCL, and SYNC Storage Temperature Range .............................-55C to +125C Relative to V ........-0.5V to (V + 0.5V), not to exceed 6.0V Soldering Temperature...........................Refer to the IPC/JEDEC CC CC Voltage Range on RH, RL, RW, and Y .......................-0.5V to V+ J-STD-020 Specification. Voltage Range Across RH and RL.............................-0.5V to V+ Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. RECOMMENDED OPERATING CONDITIONS (T = -40C to +100C) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS V Supply Voltage V (Note 1) +2.7 +3.6 V CC CC V+ Voltage V+ > V (Note 1) +4.5 +15.5 V CC Input Logic 0 0.3 x V (Note 1) -0.3 V IL (SCL, SDA, SYNC) V CC Input Logic 1 0.7 x V CC V (Note 1) V IH (SCL, SDA, SYNC) V + 0.3 CC Switch Current (All Switches) I 3 mA SW Resistor Current I 3 mA RES SYNC Frequency f 1 MHz SYNC ELECTRICAL CHARACTERISTICS (V = +2.7V to +3.6V, T = -40C to +100C, unless otherwise noted.) CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 2 V Standby Current I V = +3.6V, I C inactive (Note 2) 10 A CC STBY CC V Supply Current CC I f = 400kHz (Note 3) 3 mA CC SCL (NV Read or Write) V+ Bias Current I +1 A V+ Input Leakage (SDA, SCL, SYNC) I -1 +1 A L Low-Level Output Voltage (SDA) V 3mA sink current 0 0.4 V OL DCP Wiper Response Time t 1 s DCP I/O Capacitance C 5 10 pF I/O Min V when NV memory is recalled CC Power-Up Recall Voltage V 1.2 2.6 V POR (Note 4) V > V to initial memory recall done CC POR Power-Up Memory Recall Delay t 3 ms D (Note 5) Wiper Resistance R V+ = 15.0V 5000 W End-to-End Resistance (RH to RL) R 5 k TOTAL R Tolerance -20 +20 % TOTAL CH, CL, CW Capacitance C 10 pF POT 2 DS3503