LTC2756
13
2756fa
For more information www.linear.com/LTC2756
Table 1. Command Codes
CODE
COMMAND
READBACK POINTER–
CURRENT INPUT WORD W
0
READBACK POINTER–
NEXT INPUT WORD W
+1
C3 C2 C1 C0
0 0 1 0 Write Span Set by Previous Command Input Span Register
0 0 1 1 Write Code Set by Previous Command Input Code Register
0 1 0 0 Update Set by Previous Command DAC Span Register
0 1 1 0 Write Span; Update Set by Previous Command DAC Span Register
0 1 1 1 Write Code; Update Set by Previous Command DAC Code Register
1 0 1 0 Read Input Span Register Input Span Register Input Span Register
1 0 1 1 Read Input Code Register Input Code Register Input Code Register
1 1 0 0 Read DAC Span Register DAC Span Register DAC Span Register
1 1 0 1 Read DAC Code Register DAC Code Register DAC Code Register
1 1 1 1 No Operation Set by Previous Command DAC Code Register
— System Clear — DAC Span Register
— Initial Power-Up or Power Interrupt — DAC Span Register
Codes not shown are reserved—do not use.
Table 2. Span Codes
S3 S2 S1 S0 SPAN
0 0 0 0 Unipolar 0V to 5V
0 0 0 1 Unipolar 0V to 10V
0 0 1 0 Bipolar –5V to 5V
0 0 1 1 Bipolar –10V to 10V
0 1 0 0 Bipolar –2.5V to 2.5V
0 1 0 1 Bipolar –2.5V to 7.5V
Codes not shown are reserved–do not use.
operaTion
