DATASHEET
ISL90727, ISL90728 FN8247
Rev 8.00
May 10, 2012 Single Volatile 128-Tap XDCPв„ў Digitally Controlled Potentiometer (XDCP)
The Intersil ISL90727 and ISL90728 are digitally controlled
potentiometers (XDCPв„ў). Each device consists of a resistor
array, wiper switches, and a control section. The wiper
position is controlled by an I2C Busв„ў. Features The potentiometer is implemented by a resistor array
composed of 127 resistive elements and a wiper switching
network. Between each element and at either end are tap
points accessible to the wiper terminal. The position of the
wiper element is controlled by the SDA and SCL inputs. DCP Terminal Voltage, 2.7V to 5.5V Pinout Volatile Solid-State Potentiometer I2C Serial Bus Interface Low Tempco
-Rheostat -45 ppm/В°C Typical
-Divider -15 ppm/В°C Typical 128 Wiper Tap Points
-Wiper Resistance 70пЃ— Typ at VCC = 3.3V Low Power CMOS
-Active Current, 200ВµA Max
-Standby Current, 500nA Max ISL90727, ISL90728
(6 LD SC-70)
TOP VIEW
VDD 1 6 RH Available RTOTAL Values = 50kпЃ—пЂ¬пЂ 10kпЃ— 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 RF Amplifier Biasing LCD Brightness and Contrast Adjustment Gain Control and Offset Adjustment Ordering Information
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