Datasheet

LTC2494
24
2494fd
Figure 7. External Serial Clock, Reduced Output Data Length and Valid Channel Selection
applications inForMation
Figure 8. External Serial Clock, 3-Wire Operation (CS = 0)
Hi-Z
2494 F07
CS
SCK
(EXTERNAL)
SDI
SDO
CONVERSION SLEEP DATA INPUT/OUTPUT SLEEPCONVERSION
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
LTC2494
4-WIRE
SPI INTERFACE
•
•
•
•
•
•
•
•
•
•
•
•
EOC
BIT 20 BIT 19 BIT 18 BIT 17 BIT 16 BIT 15BIT 21BIT 22BIT 23
1 2 3 4 5 6 7 8
1 0 EN SGL A2 A1 A0ODD
DON'T CAREDON'T CARE
MSBSIG“0”
10µF
0.1µF
2.7V TO 5.5V
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
LTC2494
3-WIRE
SPI INTERFACE
•
•
•
•
•
•
•
•
•
•
•
•
EOC
CS
SCK
(EXTERNAL)
SDI
SDO
2494 F08
CONVERSION
SLEEP
DATA INPUT/OUTPUT
CONVERSION
BIT 20 BIT 19 BIT 18 BIT 17 BIT 16 BIT 15 BIT 14 BIT 13 BIT 12 BIT 11BIT 21BIT 22BIT 23
1 0 EN SGL A2 A1 A0 EN2 IM FA FB SPD GS2 GS1 GS0ODD
BIT 10 BIT 9 BIT 0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 24
DON'T CAREDON'T CARE
MSBSIG“0”
10µF
0.1µF
2.7V TO 5.5V