LTC2411 LINER [Linear Technology], LTC2411 Datasheet - Page 18

• Manufacturer Part Number: LTC2411
• Description: 24-Bit No Latency ADC with Differential Input and Reference in MSOP
• Manufacturer: LINER [Linear Technology]

APPLICATIO S I FOR ATIO
LTC2411/LTC2411-1
Data is shifted out the SDO pin on each falling edge of SCK
enabling external circuitry to latch data on the rising edge
of SCK. EOC can be latched on the first rising edge of SCK.
On the 32nd falling edge of SCK, SDO goes HIGH (EOC = 1)
indicating a new conversion has begun.
18
(EXTERNAL)
(INTERNAL)
SDO
SCK
SDO
SCK
CS
CS
CONVERSION
CONVERSION
Hi-Z
U
TEST EOC
SLEEP
U
SLEEP
Hi-Z
<t
EOCtest
BIT 31
EOC
W
BIT 31
Figure 8. Internal Serial Clock, Single Cycle Operation
EOC
Figure 7. External Serial Clock, CS = 0 Operation
BIT 30
BIT 30
ANALOG INPUT RANGE
ANALOG INPUT RANGE
–0.5V
–0.5V
REF
REF
U
REFERENCE
0.1V TO V
0.1V TO V
REFERENCE
BIT 29
TO 0.5V
TO 0.5V
BIT 29
SIG
VOLTAGE
VOLTAGE
SIG
1 F
1 F
2.7V TO 5.5V
2.7V TO 5.5V
REF
REF
CC
CC
BIT 28
MSB
BIT 28
MSB
1
2
3
4
5
6
1
2
3
4
5
6
DATA OUTPUT
V
REF
REF
IN
IN
GND
V
REF
REF
IN
IN
GND
CC
CC
LTC2411-1
LTC2411-1
+
–
+
–
LTC2411/
LTC2411/
+
–
+
–
Internal Serial Clock, Single Cycle Operation
This timing mode uses an internal serial clock to shift out
the conversion result and a CS signal to monitor and
control the state of the conversion cycle, see Figure 8.
BIT 27
BIT 27
SDO
SDO
SCK
SCK
DATA OUTPUT
CS
CS
F
F
O
O
10
9
8
7
10
9
8
7
BIT 26
BIT 26
2-WIRE I/O
3-WIRE
SPI INTERFACE
V
V
CC
CC
= 50Hz REJECTION (LTC2411)
= EXTERNAL OSCILLATOR
= 60Hz REJECTION (LTC2411)
= SIMULTANEOUS 50Hz/60Hz REJECTION (LTC2411-1)
= 50Hz REJECTION (LTC2411)
= EXTERNAL OSCILLATOR
= 60Hz REJECTION (LTC2411)
= SIMULTANEOUS 50Hz/60Hz REJECTION (LTC2411-1)
LSB
BIT 5
LSB
BIT 5
24
24
BIT 0
BIT 0
CONVERSION
CONVERSION
V
CC
Hi-Z
10k
TEST EOC
2411 F08
2411 F07
Hi-Z