
LTC2494
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
SLEEP
CONVERSION
VCC
fO
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 VCC
ANALOG
INPUTS
= EXTERNAL OSCILLATOR
= INTERNAL OSCILLATOR
LTC2494
4-WIRE
SPI INTERFACE
EOC
BIT 20 BIT 19 BIT 18 BIT 17 BIT 16
BIT 15
BIT 21
BIT 22
BIT 23
1
2
3
4
5
6
7
8
1
0
EN
SGL
A2
A1
A0
ODD
DON'T CARE
MSB
SIG
“0”
10F
0.1F
2.7V TO 5.5V
VCC
fO
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 VCC
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 11
BIT 21
BIT 22
BIT 23
1
0
EN
SGL
A2
A1
A0
EN2
IM
FA
FB
SPD
GS2
GS1
GS0
ODD
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 CARE
MSB
SIG
“0”
10F
0.1F
2.7V TO 5.5V