Datasheet

LTC2484
23
2484fd
APPLICATIONS INFORMATION
EN DON’T CARE IM FOA FOB SPD
SDI
DON’T CARE DON’T CARE
SDO
SCK
(INTERNAL)
CS
>t
EOCtest
MSBSIG
BIT 8
TEST EOC
(OPTIONAL)
TEST EOC
BIT 27 BIT 26 BIT 25 BIT 24BIT 28BIT 29BIT 30
EOC
BIT 31
EOC
BIT 0
SLEEPSLEEP
DATA OUTPUT
Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z
DATA
OUTPUT
CONVERSIONCONVERSIONSLEEP
2484 F09
<t
EOCtest
TEST EOC
V
CC
f
O
V
REF
IN
+
IN
–
SCK
SDI
SDO
CS
GND
210
INT/EXT CLOCK
3
4
5
9
10k
V
CC
7
8
6
1
REFERENCE
VOLTAGE
0.1V TO V
CC
ANALOG
INPUT
1μF
2.7V TO 5.5V
LTC2484
4-WIRE
SPI INTERFACE
Figure 9. Internal Serial Clock, Reduce Data Output Length
EN DON’T CARE IM FOA FOB SPD
SDI
DON’T CARE DON’T CARE
SDO
SCK
(INTERNAL)
CS
MSBSIG
BIT 0
LSB
BIT 5
TEST EOC
BIT 27 BIT 26 BIT 25 BIT 24BIT 28BIT 29BIT 30
EOC
BIT 31
SLEEP
SLEEP
DATA OUTPUT CONVERSIONCONVERSION
2484 F08
<t
EOCtest
Hi-Z Hi-Z Hi-Z Hi-Z
TEST EOC
V
CC
f
O
V
REF
IN
+
IN
–
SCK
SDI
SDO
CS
GND
210
INT/EXT CLOCK
3
4
5
9
10k
V
CC
7
8
6
1
REFERENCE
VOLTAGE
0.1V TO V
CC
ANALOG
INPUT
1μF
2.7V TO 5.5V
LTC2484
4-WIRE
SPI INTERFACE
Figure 8. Internal Serial Clock, Single Cycle Operation