参数资料
型号: W83L786NR
厂商: WINBOND ELECTRONICS CORP
元件分类: 通信及网络
英文描述: SPECIALTY TELECOM CIRCUIT, PDSO20
封装: 0.209 INCH, SSOP-20
文件页数: 8/50页
文件大小: 998K
代理商: W83L786NR
W83L786NR/ W83L786NG
Publication Release Date: March 31, 2006
- 11 -
Revision 0.9
7.5 Temperature Measurement Machine
The temperature data format is 8-bit unsigned for thermal sensor. The 8-bit temperature data can be
obtained by reading the VR [25h] or VR [26h]. The format of the temperature data is shown in Table 1.
TEMPERATURE
8-BIT DIGITAL OUTPUT
8-BIT BINARY
8-BIT HEX
+160°C
1010,0000
A0h
+25°C
0001,1001
19h
+2°C
0000,0010
02h
+1°C
0000,0001
01h
+0°C
0000,0000
00h
Table 1
7.5.1
Monitor Temperature from Thermistor
The W83L786NR/NG can connect one thermistor and one thermal diode sensor to measure two
different environment temperatures. The specification of thermistor should be considered to (1)
β
value is 3435 K, and (2) resistor value is 10K ohms at 25
°C. In the Figure 3, the themistor is
connected by a serial resistor with 10K Ohms, and then connect to VREF (pin 15).
7.5.2
Monitor Temperature from Thermal Diode
The W83L786NR/NG can alternate the thermistor to thermal diode interface and the circuit connection
is shown as Figure 5. The pin of D- is connected to power supply ground (GND) and the pin D+ is
connected to pin D+ or VTIN1 in the W83L786NR/NG. The bypass capacitor C=2200pF should be
added to filter the high frequency noise.
C = 2200pF
B ipola r T r a n s is tor
T e m pe ra tur e s e ns or
2N 3904
C = 2200pF
D+
VT IN1
W 83 L 786N R
C P U o r GP U
D+
D-
Th e rm in a l
D iode
D-
Figure 5
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