DATASHEET ISL90726 FN8244 Rev 4.00 Single Volatile 128-Tap XDCP Digitally Controlled Potentiometer (XDCP) August 26, 2008 The Intersil ISL90726 is a digitally controlled potentiometer Features (XDCP). The device consists of a resistor array, wiper Volatile Solid-State Potentiometer switches, and a control section. The wiper position is 2 2 controlled by an I C interface. I C Serial Bus Interface The potentiometer is implemented by a resistor array DCP Terminal Voltage, 2.7V to 5.5V composed of 127 resistive elements and a wiper switching Low Tempco network. Between each element and at either end are tap - Rheostat - 45 ppm/C typical points accessible to the wiper terminal. The position of the - Divider - 15 ppm/C typical wiper element is controlled by the SDA and SCL inputs. 128 Wiper Tap Points Pinout - Wiper Resistance 70 typ at V = 3.3V CC ISL90726 Low Power CMOS (6 LD SC-70) - Active Current, 200A Max TOP VIEW - Standby Current, 500nA Max VDD 1 6 RL Available R Values = 50k10k TOTAL GND 2 5 RW Power on Preset to Midscale SCL 3 4 SDA Packaging - 6 Ld SC-70 Pb-Free (RoHS compliant) Applications Mechanical Potentiometer Replacement Transducer Adjustment of Pressure, Temperature, Position, Chemical, and Optical Sensors Laser Diode and LED Biasing LCD Brightness and Contrast Adjustment Gain Control and Offset Adjustment DDR3 Margining Ordering Information PART NUMBER TEMP RANGE PACKAGE (Note) PART MARKING R (k ) (C) (Pb-Free) PKG. DWG. TOTAL ISL90726WIE627Z-TK* ANF 10 -40 to +85 6 Ld SC-70 P6.049 ISL90726UIE627Z-TK* ANG 50 -40 to +85 6 Ld SC-70 P6.049 *Please refer to TB347 for details on reel specifications. NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. FN8244 Rev 4.00 Page 1 of 8 August 26, 2008ISL90726 Pin Descriptions PIN NUMBER SYMBOL DESCRIPTION 1 VDD Supply Voltage 2 GND Ground 3 SCL Open drain Serial Clock input 4 SDA Open drain Serial Data I/O 5 RW Potentiometer Wiper Terminal 6 RL Potentiometer End Terminal Block Diagram VDD RH SCL 2 I C SDA RW INTERFACE RL WIPER REGISTER GND FN8244 Rev 4.00 Page 2 of 8 August 26, 2008