Datasheet

LTC2486
22
2486fd
APPLICATIONS INFORMATION
Figure 7. External Serial Clock, Reduced Output Data Length and Valid Channel Selection
Figure 8. External Serial Clock, 3-Wire Operation (CS = 0)
V
CC
f
O
SCK
SDI
GND
REFERENCE
VOLTAGE
0.1V TO V
CC
ANALOG
INPUTS
= EXTERNAL OSCILLATOR
= INTERNAL OSCILLATOR
LTC2486
3-WIRE
SPI INTERFACE
EOC
CS
SCK
(EXTERNAL)
SDI
SDO
2486 F08
CONVERSION
SLEEP
DATA INPUT/OUTPUT
BIT 20 BIT 19 BIT 18 BIT 17 BIT 16 BIT 15 BIT 14 BIT 13 BIT 12 BIT 11BIT 21BIT 22BIT 23
1 0 EN SGL A2 A1 A0 EN2 IM FA FB SPD GS2 GS1 GS0ODD
BIT 10 BIT 9 BIT 0
1 2 3 4 5 6 7 8 9 10111213141516 24
DON'T CAREDON'T CARE
MSBSIG“0”
REF
+
REF
–
CH0
CH1
CH2
CH3
COM
SDO
12 1
13
14
8
9
10
11
7
3
5
6
4
2
2.7V TO 5.5V
0.1μF
10μF
CS
CONVERSION
Hi-Z
2486 F07
CS
SCK
(EXTERNAL)
SDI
SDO
CONVERSION SLEEP DATA INPUT/OUTPUT SLEEPCONVERSION
V
CC
f
O
SCK
SDI
GND
6
REFERENCE
VOLTAGE
0.1V TO V
CC
ANALOG
INPUTS
= EXTERNAL OSCILLATOR
= INTERNAL OSCILLATOR
LTC2486
4-WIRE
SPI INTERFACE
EOC
BIT 20 BIT 19 BIT 18 BIT 17 BIT 16 BIT 15BIT 21BIT 22BIT 23
12345678
1 0 EN SGL A2 A1 A0ODD
DON'T CAREDON'T CARE
MSBSIG“0”
REF
+
REF
–
CH0
CH1
CH2
CH3
COM
CS
SDO
12 1
13
14
8
9
10
11
7
3
4
5
2
2.7V TO 5.5V
0.1μF
10μF