AS1539-BTSU View Datasheet(PDF) - austriamicrosystems AG
Part Name
Description
MFG CO.
'AS1539-BTSU' PDF : 20 Pages View PDF
AS1539/AS1541
Data Sheet - Detailed Description
Where:
SD: Single-Ended/Differential Inputs
0: Differential Inputs
1: Single-Ended Inputs
C2, C1, C0: Channel Selections
PD1, PD0: Power-Down Selection
X: Unused
Powerdown Selection
Powerdown modes for the AS1539/AS1541 are selected by setting bits PD0 and PD1 of a command byte (see Com-
mand Byte on page 12).
Table 5. Powerdown Mode Bit Settings
PD1
PD0
Description
0
0
Powerdown between A/D converter conversions.
0
1
Internal reference off and A/D converter on.
1
0
Internal reference on and A/D converter off.
1
1
Internal reference on and A/D converter on.
Channel Selection
Channel selection for the AS1539/AS1541 is made using a command byte (see Command Byte on page 12).
Table 6. Channel Selection Bit Settings1
SD C2 C1 C0 CH0
0
0
0
0
+IN
0
0
0
1
-
0
0
1
0
-
CH1
–IN
-
-
CH2
-
+IN
-
CH3
-
–IN
-
CH4
-
-
+IN
CH5
-
-
–IN
CH6
-
-
-
CH7
-
-
-
COM
-
-
-
0
0
1
1
-
-
-
-
-
-
+IN –IN
-
0
1
0
0
–IN +IN
-
-
-
-
-
-
-
0
1
0
1
-
-
–IN +IN
-
-
-
-
-
0
1
1
0
-
-
-
-
–IN +IN
-
-
-
0
1
1
1
-
-
-
-
-
-
–IN +IN
-
1
0
0
0
+IN
-
-
-
-
-
-
-
–IN
1
0
0
1
-
-
+IN
-
-
-
-
-
–IN
1
0
1
0
-
-
-
-
+IN
-
-
-
–IN
1
0
1
1
-
-
-
-
-
-
+IN
-
–IN
1
1
0
0
1
1
0
1
1
1
1
0
-
+IN
-
-
-
-
-
-
-
-
+IN
-
-
-
-
-
-
-
-
+IN
-
-
–IN
-
–IN
-
–IN
1
1
1
1
-
-
-
-
-
-
-
+IN –IN
1. For the 4-channel AS1541 only combinations of CH0:CH3 applies.
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Revision 1.02
13 - 20
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