AD9520-5
Serial Control Port ..........................................................................46
SPI/IꢀC Port Selection ................................................................46
IꢀC Serial Port Operation...........................................................46
I2C Bus Characteristics...........................................................46
Data Transfer Process.............................................................47
Data Transfer Format .............................................................48
IꢀC Serial Port Timing............................................................48
SPI Serial Port Operation...........................................................49
Pin Descriptions......................................................................49
SPI Mode Operation...............................................................49
Communication Cycle—Instruction Plus Data..................49
Write .........................................................................................49
Read ..........................................................................................49
SPI Instruction Word (16 Bits)..................................................50
SPI MSB/LSB First Transfers .....................................................50
EEPROM Operations......................................................................53
Writing to the EEPROM ............................................................53
Reading from the EEPROM ......................................................53
Programming the EEPROM Buffer Segment..........................53
Register Section Definition Group.......................................54
IO_UPDATE (Operational Code 0x80) ..............................54
End-of-Data (Operational Code 0xFF) ...............................54
Pseudo-End-of-Data (Operational Code 0xFE).................54
Thermal Performance.....................................................................55
Register Map ....................................................................................56
Register Map Descriptions.............................................................61
Applications Information...............................................................75
Frequency Planning Using the AD9520 ..................................75
Using the AD9520 Outputs for ADC Clock Applications ....75
LVPECL Clock Distribution......................................................75
CMOS Clock Distribution.........................................................76
Outline Dimensions........................................................................77
Ordering Guide ...........................................................................77
REVISION HISTORY
10/08—Revision 0: Initial Version
Rev. 0 | Page 3 of 80