LTC2431 Linear Technology, LTC2431 Datasheet - Page 18

• Manufacturer Part Number: LTC2431
• Description: (LTC2430 / LTC2431) 20-Bit No Latency Delta-Sigma ADCs
• Manufacturer: Linear Technology

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