参数资料
型号: MAX31855SASA+T
厂商: Maxim Integrated
文件页数: 10/13页
文件大小: 0K
描述: IC CONV THERMOCOUPLE-DGTL 8SOIC
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 1
功能: 热电偶冷端温度补偿器
传感器类型: 外部
感应温度: 50°C ~ 1600°C
精确度: ±6°C(最小值)
拓扑: ADC
输出类型: 3 线/SPI? 串行
输出警报:
输出风扇:
电源电压: 3 V ~ 3.6 V
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOICN
包装: 标准包装
其它名称: MAX31855SASA+TDKR
MAX31855
Cold-Junction Compensated
Thermocouple-to-Digital Converter
Table 2. Memory Map—Bit Weights and Functions
14-BIT THERMOCOUPLE
TEMPERATURE DATA
RES
FAULT
BIT
12-BIT INTERNAL TEMPERATURE
DATA
RES
SCV
BIT
SCG
BIT
OC
BIT
BIT
VALUE
D31
Sign
D30
MSB 2 10
(1024 N C)
D18
LSB 2 -2
(0.25 N C)
D17
Reserved
D16
1 =
Fault
D15
Sign
D14
MSB
2 6
(64 N C)
D4
LSB 2 -4
(0.0625 N C)
D3
Reserved
D2
1 =
Short
to
V CC
D1
1 =
Short
to
GND
D0
1 =
Open
Circuit
Table 3. Memory Map—Descriptions
BIT
D[31:18]
D17
D16
D[15:4]
D3
D2
D1
D0
NAME
14-Bit Thermocouple
Temperature Data
Reserved
Fault
12-Bit Internal Temperature
Data
Reserved
SCV Fault
SCG Fault
OC Fault
DESCRIPTION
These bits contain the signed 14-bit thermocouple temperature value. See Table 4 .
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.
These bits contain the signed 12-bit value of the reference junction temperature.
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.
Table 4. Thermocouple Temperature Data
Format
Table 5. Reference Junction Temperature
Data Format
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
Note: The practical temperature ranges vary with the
thermocouple type.
Maxim Integrated
10
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