Datasheet

LTC2486
20
2486fd
APPLICATIONS INFORMATION
Figure 4. Internal PTAT Digital Output vs Temperature Figure 5. Absolute Temperature Error
Table 6. Serial Interface Timing Modes
CONFIGURATION
SCK
SOURCE
CONVERSION
CYCLE CONTROL
DATA OUTPUT
CONTROL
CONNECTION AND
WAVEFORMS
External SCK, Single Cycle
Conversion
External CS and SCK CS and SCK Figures 6, 7
External SCK, 3-Wire I/O External SCK SCK Figure 8
Internal SCK, Single Cycle
Conversion
Internal
CS↓ CS↓
Figures 9, 10
Internal SCK, 3-Wire I/O,
Continuous Conversion
Internal Continuous Internal Figure 11
TEMPERATURE (K)
0
DATAOUT
16
480
640
800
960
1020
400
2486 F04
320
0
300200100
160
V
CC
= 5V
V
REF
= 5V
SLOPE = 2.45 LSB
16
/K
TEMPERATURE (°C)
–55 –30 –5
ABSOLUTE ERROR (°C)
5
4
3
2
1
–4
–3
–2
–1
0
12095704520
2486 F05
–5
Figure 6. External Serial Clock, Single Cycle Operation
Hi-Z
2486 F06
CS
SCK
(EXTERNAL)
SDI
SDO
CONVERSION SLEEP DATA INPUT/OUTPUT CONVERSION
V
CC
f
O
REF
+
REF
–
CH0
CH1
CH2
CH3
COM
SCK
SDI
CS
SDO
GND
12 1
13
14
8
9
10
11
7
3
4
6
5
2
REFERENCE
VOLTAGE
0.1V TO V
CC
ANALOG
INPUTS
= EXTERNAL OSCILLATOR
= INTERNAL OSCILLATOR
LTC2486
2.7V TO 5.5V
0.1μF
10μF
4-WIRE
SPI INTERFACE
EOC
BIT 20 BIT 19 BIT 18 BIT 17 BIT 16 BIT 15 BIT 14 BIT 13 BIT 12 BIT 11BIT 21BIT 22BIT 23
BIT 10 BIT 9 BIT 0
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1 0 EN SGL A2 A1 A0 EN2 IM FA FB SPD GS2 GS1 GS0ODD
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