DATASHEET ISL90727, ISL90728 FN8247 Rev 8.00 Single Volatile 128-Tap XDCP Digitally Controlled Potentiometer (XDCP) May 10, 2012 The Intersil ISL90727 and ISL90728 are digitally controlled Features potentiometers (XDCP). Each device consists of a resistor Volatile Solid-State Potentiometer array, wiper switches, and a control section. The wiper 2 2 position is controlled by an I C Bus. I C Serial Bus Interface DCP Terminal Voltage, 2.7V to 5.5V The potentiometer is implemented by a resistor array 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 - Wiper Resistance 70 Typ at V = 3.3V Pinout CC ISL90727, ISL90728 Low Power CMOS (6 LD SC-70) - Active Current, 200A Max TOP VIEW - Standby Current, 500nA Max Available R Values = 50k10k VDD 1 6 RH TOTAL Power-on Preset to Midscale GND 2 5 RW Packaging SCL 3 4 SDA - 6 Ld SC-70 Pb-Free (RoHS Compliant) Applications Mechanical Potentiometer Replacement Transducer Adjustment of Pressure, Temperature, Position, Chemical, and Optical Sensors RF Amplifier Biasing LCD Brightness and Contrast Adjustment Gain Control and Offset Adjustment Ordering Information PART NUMBER PART MARKING R TEMP RANGE PACKAGE PKG. TOTAL (Notes 1, 2, 3, 4) (Bottom Side) (k ) (C) (Pb-Free) DWG. ISL90727UIE627Z-TK ANI 50 -40 to +85 6 Ld SC-70 P6.049 ISL90727WIE627Z-T7A ANH 10 -40 to +85 6 Ld SC-70 P6.049 ISL90727WIE627Z-TK ANH 10 -40 to +85 6 Ld SC-70 P6.049 ISL90728UIE627Z-TK CDY 50 -40 to +85 6 Ld SC-70 P6.049 ISL90728WIE627Z-T7A CCF 10 -40 to +85 6 Ld SC-70 P6.049 ISL90728WIE627Z-TK CCF 10 -40 to +85 6 Ld SC-70 P6.049 NOTES: 1. Please refer to TB347 for details on reel specifications. 2. 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. 3. For Moisture Sensitivity Level (MSL), please see device information page for ISL90727, ISL90728. For more information on MSL please see Tech Brief TB363. 2 2 4. ISL90727 has an I C address 5Ch and ISL90728 has an I C address 7Ch. FN8247 Rev 8.00 Page 1 of 8 May 10, 2012ISL90727, ISL90728 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 RH Potentiometer High Terminal Block Diagram VDD RH 2 SCL I C SDA RW INTERFACE WIPER REGISTER RL GND FN8247 Rev 8.00 Page 2 of 8 May 10, 2012