MAS9285

www.DataSheet4U.com DA9285.004 13 July 2006 IC FOR XO TRIMMING DESCRIPTION MAS9285 is capacitive digital to analog converter integrated circuit well suited to make initial offset trimming of the crystal oscillator. The trimming is done by a serial bus and the calibration information is stored in an internal PROM. MAS9285 Very Low Power Wide Trimming Range Wide Supply Voltage Range Very High Level of Integration Electrically Trimmable Low Cost FEATURES Very small size Minimum current draw Wide operating temperature range APPLICATIONS OCXO All Crystal Oscillators BLOCK DIAGRAM MAS9285 DA CLK PV VDD Digital 2 3 5 VSS X1 Figure 1. Block diagram of MAS9285. 1 (11) DA9285.004 13 July 2006 PIN DESCRIPTION Pin Description Serial Bus Data Input Serial Bus Clock Input Programming Input Power Supply Voltage Power Supply Ground CDAC Output with Bias Option Symbol DA CLK PV VDD VSS X1 x-coordinate 192 425 656 161 368 629 y-coordinate 152 152 158 855 855 871 Note Note: Because the substrate of the die is internally connected to VDD, the die has to be connected to VDD or left floating. Please make sure that VDD is the first pad to be bonded. Pick-and-place and all component assembly are recommended to be performed in ESD protected area. Note: Pad coordinates measured from the left bottom corner of the chip to the center of the pads. The coordinates may vary depending on sawing width and location, however, distances between pads are accurate. ABSOLUTE ...