AS1543/44
Data Sheet - Detailed Description
Analog Input Configuration
Table 7. Analog Input Configuration via bits RANGE and SE/FDN
Analog Input Configuration
RANGE
SE/FDN
Comments
1
0
1
0
1
1
0
0
VINx from [0V to VREFIN]
8/4-channel single-ended
VINx from [0V to 2xVREFIN]
VINx - VINy from [-VREFIN/2 to +VREFIN/2]
VINx - VINy from [-VREFIN to +VREFIN]
4/2-channel fully-differential
Note: If bit RANGE = 0 and bit SE/FDN =1 VDD must be at least two times larger than VREFIN.
Input Channel Selection
The input channels for conversion are selected using control register bits ADDR3:ADDR0 and bit SE/FDN.
Table 8. Channel Selection via Bits ADDR3:ADDR0 and SE/FDN, AS1544
Analog Input Channel
SE/FDN = 1
Analog Input Channel
SE/FDN = 0
ADDR3
ADDR2
ADDR1
ADDR0
(Single-Ended)
(Fully-Differential)
X
X
X
X
X
X
X
X
0
0
1
1
0
1
0
1
VIN0
VIN1
VIN2
VIN3
VIN0 - VIN1
VIN1 - VIN0
VIN2 - VIN3
VIN3 - VIN2
Table 9. Channel Selection via Bits ADDR3:ADDR0 and SE/FDN, AS1543
Analog Input Channel
Analog Input Channel
SE/FDN = 0
ADDR3
ADDR2
ADDR1
ADDR0
SE/FDN = 1
(Single-Ended)
(Fully-Differential)
X
X
X
X
X
X
X
X
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
VIN0
VIN1
VIN2
VIN3
VIN4
VIN5
VIN6
VIN7
VIN0 - VIN1
VIN1 - VIN0
VIN2 - VIN3
VIN3 - VIN2
VIN4 - VIN5
VIN5 - VIN4
VIN6 - VIN7
VIN7 - VIN6
www.austriamicrosystems.com
Revision 1.00
15 - 29
AMSCO [ AMS(艾迈斯) ]
