參數(shù)資料
型號(hào): DS1620R
廠商: DALLAS SEMICONDUCTOR
元件分類: Switch/Digital Output Temperature Sensor
英文描述: DIGITAL TEMP SENSOR-SERIAL, 9BIT(s), RECTANGULAR, SURFACE MOUNT
封裝: 0.300 INCH, SO-16
文件頁數(shù): 6/11頁
文件大?。?/td> 17247K
代理商: DS1620R
DS1620R
4 of 11
102099
The TLOW output functions similarly to the THIGH output. When the DS1620R’s measured temperature
equals or falls below the value stored in the low temperature register, the TLOW output becomes active.
TLOW remains active until the DS1620R’s temperature becomes greater than the value stored in the low
temperature register, TL. The TLOW output can be used to indicate that a low temperature tolerance
boundary has been met or exceeded, or as part of a closed loop system it can be used to activate a heating
system and to deactivate it when the system temperature returns to tolerance.
The TCOM output goes high when the measured temperature exceeds TH, and will stay high until the
temperature falls below TL. In this way, any amount of hysteresis may be obtained.
THERMOSTAT OUTPUT OPERATION Figure 2
OPERATION AND CONTROL
The DS1620R must have temperature settings resident in the TH and TL registers for thermostatic
operation. A configuration/status register also determines the method of operation that the DS1620R will
use in a particular application and indicates the status of the temperature conversion operation.
The configuration register is defined as follows:
CONFIGURATION/STATUS REGISTER
where
DONE = Conversion Done bit. 1=Conversion complete, 0=Conversion in progress. In continuous
conversion mode, the bit will always be 0. In one–shot mode, this bit should be checked prior to
attempting to read the temperature to ensure that the conversion is complete.
THF
= Temperature High Flag. This bit will be set to 1 when the temperature is greater than or equal
to the value of TH. It will remain 1 until reset by writing 0 into this location or by removing power from
the device. This feature provides a method of determining if the DS1620 has ever been subjected to
temperatures above TH while power has been applied.
TLF
= Temperature Low Flag. This bit will be set to 1 when the temperature is less than or equal to
the value of TL. It will remain 1 until reset by writing 0 into this location or by removing power from the
DONE
THF
TLF
NVB
1
0
CPU
1SHOT
THIGH
TLOW
TCOM
TL
TH
T(°C)
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