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參數(shù)資料
| 型號(hào)： | LM73_06 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | 2.7V, SOT-23, 11-to-14 Bit Digital Temperature Sensor with 2-Wire Interface |
| 中文描述： | 為2.7V，采用SOT - 23，11至14位數(shù)字溫度傳感器，2線接口 |
| 文件頁數(shù)： | 14/18頁 |
| 文件大小： | 732K |
| 代理商： | LM73_06 |
2.0 LM73 Registers
(Continued)
2.2 TEMPERATURE DATA REGISTER
Pointer Address 00h (Read Only)
Reset State: 7FFCh (+255.96875C)
One-Shot State: 8000h (-256C)
D15
SIGN
D14
128C
D13
64C
D12
32C
D11
16C
D10
8C
D9
4C
D8
2C
D7
1C
D6
0.5C
D5
D4
D3
D2
D1
D0
0.25C
0.125C
0.0625C
0.03125C
reserved
reserved
Bits
15:2
Name
Temperature Data
Description
Represents the temperature that was measured by the most recent temperature conversion.
On Power-up, this data is invalid until the Data Available (DAV) bit in the Control/Status
register is high (after the completion of the first temperature conversion). The resolution is
user-progammable from 11-bit resolution (0.25C/LSB) through 14-bit resolution
(0.03125C/LSB). The desired resolution is programmed with bits 5 and 6 of the
Control/Status register.
Return zeros upon read.
1:0
Not Used
2.3 CONFIGURATION REGISTER
Pointer Address 01h (R/W)
Reset State: 40h
D7
PD
D6
D5
D4
D3
D2
D1
D0
reserved
ALRT EN
ALRT POL
ALRT RST
ONE SHOT
reserved
Bits
7
Name
Full Power Down
Description
Writing a 1 to this bit puts the LM73 in shutdown mode for power conservation. Writing a 0
puts the LM73 into normal mode.
User must write only a 1 to this bit
A 0 in this location enables the ALERT output. A 1 disables it. This bit also controls the
ALERT Status bit (the Control/Status Register, Bit 3) since that bit reflects the state of the
Alert pin.
When set to 1, the ALERT pin and ALERT Status bit are active-high. When 0, it is
active-low.
Writing a 1 to this bit resets the ALERT pin and the ALERT Status bit. It will always be 0
when read.
When in shutdown mode (Bit 7 is 1), initiates a single temperature conversion and update of
the temperature register with new temperature data. Has no effect when in continuous
conversion mode (i.e., when Bit 7 is 0). Always returns a 0 when read.
User must write only a 0 to these bits.
6
5
reserved
ALERT Enable
4
ALERT Polarity
3
ALERT Reset
2
One Shot
1:0
Reserved
2.4 T
HIGH
UPPER-LIMIT REGISTER
Pointer Address 02h (R/W)
Reset State: 7FE0h (+255.75C)
D15
SIGN
D14
128C
D13
64C
D12
32C
D11
16C
D10
8C
D9
4C
D8
2C
D7
1C
D6
0.5C
D5
D4
D3
D2
D1
D0
0.25C
reserved
Bits
15:5
Name
Upper-Limit
Temperature
Description
If the measured temperature that is stored in this register exceeds this user-programmable
upper temperature limit, the ALERT pin will go active and the THIGH flag in the
Control/Status register will be set to 1. Two’s complement format.
Returns zeros upon read. Recommend writing zeros only in these bits.
4:0
Reserved
L
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| LM73 | 2.7V, SOT-23, 11-to-14 Bit Digital Temperature Sensor with 2-Wire Interface |
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