
LTC2430/LTC2431
18
24301f
Figure 7. External Serial Clock, CS = 0 Operation
Figure 8. Internal Serial Clock, Single Cycle Operation
APPLICATIO S I FOR ATIO
WU
UU
EOC
BIT 23
SDO
SCK
(EXTERNAL)
CS
MSB
SIG
BIT 0
LSB
BIT 19
BIT 18
BIT 20
BIT 21
BIT 22
DATA OUTPUT
CONVERSION
2431 F07
CONVERSION
VCC
FO
REF+
REF–
SCK
IN+
IN–
SDO
GND
CS
REFERENCE
VOLTAGE
0.1V TO VCC
ANALOG INPUT RANGE
–0.5VREF TO 0.5VREF
2-WIRE I/O
1
F
2.7V TO 5.5V
= 50Hz REJECTION
= EXTERNAL OSCILLATOR
= 60Hz REJECTION
VCC
LTC2430/
LTC2431
SDO
SCK
(INTERNAL)
CS
MSB
SIG
BIT 0
LSB
TEST EOC
BIT 19
BIT 18
BIT 20
BIT 21
BIT 22
EOC
BIT 23
SLEEP
TEST EOC
(OPTIONAL)
DATA OUTPUT
CONVERSION
2431 F08
<tEOCtest
VCC
10k
Hi-Z
VCC
FO
REF+
REF–
SCK
IN+
IN–
SDO
GND
CS
REFERENCE
VOLTAGE
0.1V TO VCC
ANALOG INPUT RANGE
–0.5VREF TO 0.5VREF
3-WIRE
SPI INTERFACE
1
F
2.7V TO 5.5V
LTC2430/
LTC2431
= 50Hz REJECTION
= EXTERNAL OSCILLATOR
= 60Hz REJECTION
VCC
TEST EOC