Datasheet

17
LTC2420
APPLICATIO S I FOR ATIO
WUU
U
V
CC
F
O
V
REF
SCK
V
IN
SDO
GND CS
V
REF
0.1V TO V
CC
V
IN
–0.12V
REF
TO 1.12V
REF
= 50Hz REJECTION
= EXTERNAL OSCILLATOR
= 60Hz REJECTION
1µF
2.7V TO 5.5V
LTC2420
SDO
SCK
(EXTERNAL)
CS
DATA OUTPUT
CONVERSIONSLEEP SLEEP
TEST EOC TEST EOC
DATA OUTPUT
Hi-Z Hi-ZHi-Z
CONVERSION
2420 F07
MSBEXRSIG
BIT 8BIT 19 BIT 9BIT 20BIT 21BIT 22
EOC
BIT 23
BIT 0
EOC
Hi-Z
V
CC
TEST EOC
EOC
BIT 23
SDO
SCK
(EXTERNAL)
CS
V
CC
F
O
V
REF
SCK
V
IN
SDO
GND CS
V
REF
0.1V TO V
CC
V
IN
–0.12V
REF
TO 1.12V
REF
1µF
2.7V TO 5.5V
LTC2420
MSBEXRSIG
BIT 0
LSB
20
BIT 4BIT 19 BIT 18BIT 20BIT 21BIT 22
SLEEP DATA OUTPUT CONVERSION
2420 F07
CONVERSION
= 50Hz REJECTION
= EXTERNAL OSCILLATOR
= 60Hz REJECTION
V
CC
Figure 7. External Serial Clock, Reduced Data Output Length
Figure 8. External Serial Clock, CS = 0 Operation