Datasheet

DAC7568
DAC8168
DAC8568
SBAS430D –JANUARY 2009–REVISED MAY 2012 www.ti.com
OPERATING EXAMPLES: DAC7568/DAC8168/DAC8568
For the following examples X = don't care; value can be either '0' or '1'.
Example 1: Write to Data Buffer A, B, G, H; Load DAC A, B, G, H Simultaneously
1st: Write to data buffer A:
DB30- DB19-
DB31
DB28
DB27 DB26 DB25 DB24 DB23 DB22 DB21 DB20
DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Don't D16-
0 Care C3 C2 C1 C0 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 F3 F2 F1 F0
0 X 0 0 0 0 0 0 0 0 DATA X X X X
2nd: Write to data buffer B:
DB30- DB19-
DB31
DB28
DB27 DB26 DB25 DB24 DB23 DB22 DB21 DB20
DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Don't D16-
0 Care C3 C2 C1 C0 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 F3 F2 F1 F0
0 X 0 0 0 0 0 0 0 1 DATA X X X X
3rd: Write to data buffer G:
DB30- DB19-
DB31
DB28
DB27 DB26 DB25 DB24 DB23 DB22 DB21 DB20
DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Don't D16-
0 Care C3 C2 C1 C0 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 F3 F2 F1 F0
0 X 0 0 0 0 0 1 1 0 DATA X X X X
4th: Write to data buffer H and simultaneously update all DACs:
DB30- DB19-
DB31
DB28
DB27 DB26 DB25 DB24 DB23 DB22 DB21 DB20
DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Don't D16-
0 Care C3 C2 C1 C0 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 F3 F2 F1 F0
0 X 0 0 1 0 0 1 1 1 DATA X X X X
The DAC A, DAC B, DAC G, and DAC H analog outputs simultaneously settle to the specified values upon
completion of the 4th write sequence. (The DAC voltages update simultaneously after the 32nd SCLK falling
edge of the fourth write cycle).
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Product Folder Link(s): DAC7568 DAC8168 DAC8568