Datasheet

LTC2758
13
2758fa
For more information www.linear.com/LTC2758
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 DAC n Set by Previous Command Input Span Register DAC n
0 0 1 1 Write Code DAC n Set by Previous Command Input Code Register DAC n
0 1 0 0 Update DAC n Set by Previous Command DAC Span Register DAC n
0 1 0 1 Update All DACs Set by Previous Command DAC Code Register DAC n
0 1 1 0 Write Span DAC n
Update DAC n
Set by Previous Command DAC Span Register DAC n
0 1 1 1 Write Code DAC n
Update DAC n
Set by Previous Command DAC Code Register DAC n
1 0 0 0 Write Span DAC n
Update All DACs
Set by Previous Command DAC Span Register DAC n
1 0 0 1 Write Code DAC n
Update All DACs
Set by Previous Command DAC Code Register DAC n
1 0 1 0 Read Input Span Register DAC n Input Span Register DAC n
1 0 1 1 Read Input Code Register DAC n Input Code Register DAC n
1 1 0 0 Read DAC Span Register DAC n DAC Span Register DAC n
1 1 0 1 Read DAC Code Register DAC n DAC Code Register DAC n
1 1 1 1 No Operation Set by Previous Command
DAC Code Register DAC n
– System Clear – DAC Span Register DAC A
– Initial Power-Up or Power Interrupt – DAC Span Register DAC A
Codes not shown are reserved–do not use
Table 2. Address Codes
A3 A2 A1 A0
n
0 0 0
×
DAC A
0 0 1
×
DAC B
1 1 1
×
All DACs (Note 1)
Codes not shown are reserved–do not use.
× = Don’t Care.
Note 1. If readback is taken using the All DACs address, the LTC2758
defaults to DAC A.
Table 3. Span Codes
S3 S2 S1 S0 SPAN
×
0 0 0 Unipolar 0V to 5V
×
0 0 1 Unipolar 0V to 10V
×
0 1 0 Bipolar –5V to 5V
×
0 1 1 Bipolar –10V to 10V
×
1 0 0 Bipolar –2.5V to 2.5V
×
1 0 1 Bipolar –2.5V to 7.5V
Codes not shown are reserved–do not use.
× = Don’t Care.
OPERATION