
LTC2492
25
2492fd
APPLICATIONS INFORMATION
Figure 10. Internal Serial Clock, Reduced Data Output Length with Valid Channel and Conguration Selection
Figure 11. Internal Serial Clock, Continuous Operation
EOC
CS
SCK
(INTERNAL)
SDI
SDO
2492 F11
CONVERSION
DATA INPUT/OUTPUT
BIT 28 BIT 27 BIT 26 BIT 25 BIT 24 BIT 23 BIT 22 BIT 21
BIT 20 BIT 19
BIT 29
BIT 30
BIT 31
1
0
EN
SGL
A2
A1
A0
EN2
IM
FA
FB
SPD
ODD
BIT 18 BIT 17
BIT 0
23
14
5
6
7
8
9
10
11
12
13
14
32
DON'T CARE
MSB
SIG
“0”
VCC
fO
SCK
SDI
SDO
CS
GND
REFERENCE
VOLTAGE
0.1V TO VCC
ANALOG
INPUTS
= EXTERNAL OSCILLATOR
= INTERNAL OSCILLATOR
LTC2492
3-WIRE
SPI INTERFACE
OPTIONAL
10k
VCC
REF+
REF –
CH0
CH1
CH2
CH3
COM
12
1
13
14
8
9
10
11
7
3
5
6
4
2
2.7V TO 5.5V
0.1μF
10μF
CONVERSION
Hi-Z
2492 F10
CS
SCK
(INTERNAL)
SDI
SDO
CONVERSION
SLEEP
DATA INPUT/OUTPUT
VCC
fO
SCK
SDI
GND
REFERENCE
VOLTAGE
0.1V TO VCC
ANALOG
INPUTS
= EXTERNAL OSCILLATOR
= INTERNAL OSCILLATOR
LTC2492
4-WIRE
SPI INTERFACE
EOC
BIT 28 BIT 27 BIT 26 BIT 25 BIT 24 BIT 23 BIT 22 BIT 21
BIT 20 BIT 19
BIT 29
BIT 30
BIT 31
BIT 18
BIT17
BIT 19 BIT 19
1
2
3
4
5
6
7
8
9
10
11
121314
1516
1
0
EN
SGL
A2
A1
A0
EN2
IM
FA
FB
SPD
ODD
DON'T CARE
MSB
SIG
“0”
OPTIONAL
10k
VCC
<tEOCTEST
REF+
REF–
CH0
CH1
CH2
CH3
COM
12
1
13
14
8
9
10
11
7
3
4
6
5
2
2.7V TO 5.5V
0.1μF
10μF
CS
SDO
CONVERSION