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參數(shù)資料
| 型號： | ADT7318ARU |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 3Cel, RECTANGULAR, SURFACE MOUNT |
| 封裝： | QSOP-16 |
| 文件頁數(shù)： | 9/24頁 |
| 文件大?。?/td> | 279K |
| 代理商： | ADT7318ARU |
ADT7316/7317/7318
–17–
REV. PrH
Preliminary Technical Data
PRELIMINARY TECHNICAL DATA
EXTERNAL TEMPERATURE VALUE REGISTER (8
MSBS)
This External Temperature Value Register is a 8-bit read-
only register which stores the temperature reading from
the external temperature sensor in twos complement for-
mat. The 8 MSBs of the external temperature reading is
stored in this register.
Table xx.
External Temperature Value Register (First
Read)
D7
D6
D5
D4
D3
D2
D1
D0
M S B
B8
B7
B6
B5
B4
B3
B2
EXTERNAL TEMPERATURE VALUE REGISTER (2
LSBS)
This External Temperature Value Register is a 8-bit read-
only register which stores the temperature reading from
the external temperature sensor in twos complement for-
mat. The 2 LSBs of the external temperature reading is
stored in this register.
Table xx.
External Temperature Value Register (Second
Read)
D7
D6
D5
D4
D3
D2
D1
D0
B1
LSB
0
INTERNAL THIGH REGISTER
The Internal THIGH Register is an 8-bit read/write register
which stores the upper limit that will activate the
ALERT/
TI output. Therefore if the value in the Temperature
Value Register is greater than the value in the THIGH Regis-
ter, then the
ALERT/TI pin is activated (that is if
ALERT/TI is enabled in the Configuration Register). As
it is an 8-bit register the temperature resolution is 1oC.
Table VIIII.
Internal THIGH Register
D7
D6
D5
D4
D3
D2
D1
D0
M S B B6
B5
B4
B3
B2
B1
B0
INTERNAL TLOW REGISTER
The Internal TLOW Register is an 8-bit read/write register
which stores the lower limit that will deactivate the
ALERT/TI output. Therefore if the value in the Tem-
perature Value Register is less than the value in the TLOW
Register, the ALERT/TI pin is deactivated (that is if
ALERT/TI is enabled in the Configuration Register). As
it is an 8-bit register the temperature resolution is 1
oC.
Table X.
Internal TLOW Register
D7
D6
D5
D4
D3
D2
D1
D0
M S B B6
B5
B4
B3
B2
B1
B0
EXTERNAL THIGH REGISTER
The External THIGH Register is an 8-bit read/write register
which stores the upper limit that will activate the
ALERT/
TI output. Therefore if the value in the Temperature
Value Register is greater than the value in the THIGH Regis-
ter, then the
ALERT/TI pin is activated (that is if
ALERT/TI is enabled in the Configuration Register). As
it is an 8-bit register the temperature resolution is 1
oC.
Table X.
External TLOW Register
D7
D6
D5
D4
D3
D2
D1
D0
M S B B6
B5
B4
B3
B2
B1
B0
EXTERNAL TLOW REGISTER
The External TLOW Register is an 8-bit read/write register
which stores the lower limit that will deactivate the
ALERT/TI output. Therefore if the value in the Tem-
perature Value Register is less than the value in the TLOW
Register, the ALERT/TI pin is deactivated (that is if
ALERT/TI is enabled in the Configuration Register). As
it is an 8-bit register the temperature resolution is 1
oC.
Table X.
External TLOW Register
D7
D6
D5
D4
D3
D2
D1
D0
M S B B6
B5
B4
B3
B2
B1
B0
DAC A HIGH REGISTER
This 8-bit read/write register contains the digital data for
DAC A to convert to an analog representation. As the
ADT7318 has only an 8-bit DAC this register is all that is
is need for it’s DAC A. But in the case of the ADT7316
(12-Bit) and ADT7317 (10-Bit) this register contains the
8 MSBs of the DAC A word.
Table xx. DAC A High Register
D7
D6
D5
D4
D3
D2
D1
D0
M S B B6
B5
B4
B3
B2
B1
B0
DAC A LOW REGISTER (ADT7316/17 ONLY)
This 8-bit read/write register conatins the LSBs of the
DAC A word. In the case of the ADT7317 the 2 LSBs are
stored here and for the ADT7316 the 4 LSBs are stored
here.
Table xx. ADT7317 DAC A Low Register
D7
D6
D5
D4
D3
D2
D1
D0
B 1
L S B
00
000
0
Table xx. ADT7316 DAC A Low Register
D7
D6
D5
D4
D3
D2
D1
D0
B3
B2
B1
LSB
0
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