Datasheet

LTC2498
26
2498ff
applications inForMation
Figure 10. Internal Serial Clock, Reduced Data Output Length with Valid Channel and Configuration Selection
Figure 11. Internal Serial Clock, Continuous Operation
10µF
0.1µF
2.7V TO 5.5V
Hi-Z
2498 F10
CS
SCK
(INTERNAL)
SDI
SDO
CONVERSION SLEEP DATA INPUT/OUTPUT CONVERSION
V
CC
f
O
REF
+
REF
–
CH0
CH7
CH8
CH15
COM
SCK
SDI
SDO
CS
GND
28 35
29
30
8
15
16
23
7
38
37
1,3,4,5,6,31,32,33,39
36
34
REFERENCE
VOLTAGE
0.1V TO V
CC
ANALOG
INPUTS
= EXTERNAL OSCILLATOR
= INTERNAL OSCILLATOR
LTC2498
4-WIRE
SPI INTERFACE
•
•
•
•
•
•
•
•
•
•
•
•
EOC
BIT 28 BIT 27 BIT 26 BIT 25 BIT 24 BIT 23 BIT 22 BIT 21 BIT 20 BIT 19BIT 29BIT 30BIT 31
BIT 18 BIT 17
1 2 3 4 5 6 7 8 9 10 11 12 13 16
1 0 EN SGL A2 A1 A0 EN2 IM FA FB SPDODD
DON'T CAREDON'T CARE
MSBSIG“0”
OPTIONAL
10k
V
CC
<t
EOCTEST
10µF
0.1µF
2.7V TO 5.5V
EOC
CS
SCK
(INTERNAL)
SDI
SDO
2498 F11
CONVERSION
DATA INPUT/OUTPUT
CONVERSION
BIT 28 BIT 27 BIT 26 BIT 25 BIT 24 BIT 23 BIT 22 BIT 21 BIT 20 BIT 19BIT 29BIT 30BIT 31
1 0 EN SGL A2 A1 A0 EN2 IM FA FB SPDODD
BIT 18 BIT 17 BIT 0
2 31 4 5 6 7 8 9 10 11 12 13 14 32
DON'T CAREDON'T CARE
MSBSIG“0”
V
CC
f
O
REF
+
REF
–
CH0
CH7
CH8
CH15
COM
SCK
SDI
SDO
CS
GND
28 35
29
30
8
15
16
23
7
38
37
1,3,4,5,6,31,32,33,39
36
34
REFERENCE
VOLTAGE
0.1V TO V
CC
ANALOG
INPUTS
= EXTERNAL OSCILLATOR
= INTERNAL OSCILLATOR
LTC2498
3-WIRE
SPI INTERFACE
•
•
•
•
•
•
•
•
•
•
•
•
OPTIONAL
10k
V
CC