參數(shù)資料
型號： MAX502MJG
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： DAC
英文描述： PARALLEL, WORD INPUT LOADING, 12-BIT DAC, CDIP24
封裝： CERDIP-24
文件頁數(shù)： 10/13頁
文件大?。?/td> 877K
代理商： MAX502MJG
MAX31855
Cold-Junction Compensated
Thermocouple-to-Digital Converter
10
Maxim Integrated
Table 3. Memory Map—Descriptions
Table 4. Thermocouple Temperature Data
Format
Table 5. Reference Junction Temperature
Data Format
Note:
The practical temperature ranges vary with the
thermocouple type.
Table 2. Memory Map—Bit Weights and Functions
BIT
NAME
DESCRIPTION
D[31:18]
14-Bit Thermocouple
Temperature Data
Reserved
These bits contain the signed 14-bit thermocouple temperature value. See
Table 4
.
D17
This bit always reads 0.
This bit reads at 1 when any of the SCV, SCG, or OC faults are active. Default value
is 0.
D16
Fault
D[15:4]
12-Bit Internal Temperature
Data
Reserved
SCV Fault
SCG Fault
OC Fault
These bits contain the signed 12-bit value of the reference junction temperature.
See
Table 5
.
This bit always reads 0.
This bit is a 1 when the thermocouple is short-circuited to V
CC
. Default value is 0.
This bit is a 1 when the thermocouple is short-circuited to GND. Default value is 0.
This bit is a 1 when the thermocouple is open (no connections). Default value is 0.
D3
D2
D1
D0
TEMPERATURE
(
N
C)
+1600.00
+1000.00
+100.75
+25.00
0.00
-0.25
-1.00
-250.00
DIGITAL OUTPUT
(D[31:18])
0110 0100 0000 00
0011 1110 1000 00
0000 0110 0100 11
0000 0001 1001 00
0000 0000 0000 00
1111 1111 1111 11
1111 1111 1111 00
1111 0000 0110 00
TEMPERATURE
(
N
C)
+127.0000
+100.5625
+25.0000
0.0000
-0.0625
-1.0000
-20.0000
-55.0000
DIGITAL OUTPUT
(D[15:4])
0111 1111 0000
0110 0100 1001
0001 1001 0000
0000 0000 0000
1111 1111 1111
1111 1111 0000
1110 1100 0000
1100 1001 0000
14-BIT THERMOCOUPLE
TEMPERATURE DATA
RES
FAULT
BIT
12-BIT INTERNAL TEMPERATURE
DATA
RES
SCV
BIT
SCG
BIT
OC
BIT
BIT
D31
D30
…
D18
D17
D16
D15
D14
…
D4
D3
D2
D1
D0
VALUE
Sign
MSB 2
10
(1024
N
C)
…
LSB 2
-2
(0.25
N
C)
Reserved
1 =
Fault
Sign
MSB
2
6
(64
N
C)
…
LSB 2
-4
(0.0625
N
C)
Reserved
1 =
Short
to
V
CC
1 =
Short
to
GND
1 =
Open
Circuit
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