DS3903 Datasheet | Maxim Integrated

Description The DS3903 contains three nonvolatile (NV) low temperature coefficient digital potentiometers, which can be accessed through a 2-wire bus. It operates in both 3V and 5V systems, and it features a write-protect pin that can lock the positions of the potentiometers. An address pin allows two DS3903s to be placed on the same 2-wire bus. Features - Three 128-Position Linear Potentiometers (Two 10kΩ, One 90kΩ) - NV Wiper Storage - 0 to 5.5V on Any Potentiometer Terminal Independent of VCC - Low End-to-End Temperature Coefficient - Operates on an Industry-Standard 2-Wire Bus - Write-Protect Pin - Supply Voltage: 3V or 5V - Operating Temperature Range: -40°C to +85°C - Packaging: 20-Pin TSSOP Applications Power-Supply Calibration Mobile Phones and PDAs Fiber Optics Transceiver Modules Portable Electronics A Small, Low-Cost Replacement for Mechanical Potentiometers Ordering Information PART TEMP RANGE -40°C to +85°C -40°C to +85°C PIN-PACKAGE 20 TSSOP 20 TSSOP (Tape-and-Reel) e Data She . DS3903E-020 DS3903E-020/T&R Pin Configuration SDA 1 SCL 2 A0 3 WP 4 N.C. 5 L0 6 W1 7 L1 8 L2 9 GND 10 20 VCC 19 N.C. 18 N.C. 17 N.C. 0.1µF 4.7kΩ 2-WIRE MASTER VCC Typical Operating Circuit VCC 4.7kΩ SCL SDA POTENTIOMETER 0 10kΩ ADDDR F9h VCC POTENTIOMETER 1 90kΩ ADDDR F8h GND POTENTIOMETER 2 10kΩ ADDDR FAh 5.1kΩ Iref VARIABLE RESISTANCE FOR ADJUSTABLE CURRENT SOURCE VCC 16 N.C. 15 H0 14 W0 13 H1 12 W2 11 H2 VREF1 WP A0 HIGH-OUTPUT-IMPEDANCE VOLTAGE REFERENCE VREF2 TSSOP MAX427 BUFFERED VOLTAGE REFERENCE . _____________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at .maxim-ic.. Data Sheet 4 U . .. Triple 128-Position Nonvolatile Digital Potentiometer DS3903 ABSOLUTE MAXIMUM...