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參數(shù)資料
| 型號： | DS75LVST |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Digital Thermometer and Thermostat |
| 中文描述： | 數(shù)字溫度計和溫度 |
| 文件頁數(shù)： | 5/13頁 |
| 文件大?。?/td> | 290K |
| 代理商： | DS75LVST |
DS75LV: Digital Thermometer and Thermostat
5 of 13
OPERATION
The DS75LV measures temperature using a bandgap temperature sensing architecture. An on-board delta-sigma
analog-to-digital converter (ADC) converts the measured temperature to a digital value that is calibrated in degrees
centigrade; for Fahrenheit applications a lookup table or conversion routine must be used. The DS75LV is factory-
calibrated and requires no external components to measure temperature.
At power-up the DS75LV immediately begins converting temperature to a digital value. The resolution of the digital
output data is user-configurable to 9, 10, 11, or 12 bits, corresponding to temperature increments of 0.5 C, 0.25 C,
0.125 C, and 0.0625 C, respectively, with 9-bit default resolution at power-up. The resolution is controlled via the
R0 and R1 bits in the configuration register as explained in the
CONFIGURATION REGISTER
section of this data
sheet. Note that the conversion time doubles for each additional bit of resolution.
MEASURING TEMPERATURE
After each temperature measurement and analog-to-digital conversion, the DS75LV stores the temperature as a
16-bit two’s complement number in the 2-byte temperature register (see Figure 3). The sign bit (S) indicates if the
temperature is positive or negative: for positive numbers S = 0 and for negative numbers S = 1. The most recently
converted digital measurement can be read from the temperature register at any time. Since temperature
conversions are performed in the background, reading the temperature register does not affect the operation in
progress.
Bits 3 through 0 of the temperature register are hardwired to 0. When the DS75LV is configured for 12-bit
resolution, the 12 MSbs (bits 15 through 4) of the temperature register will contain temperature data. For 11-bit
resolution, the 11 MSbs (bits 15 through 5) of the temperature register will contain data, and bit 4 will read out as 0.
Likewise, for 10-bit resolution, the 10 MSbs (bits 15 through 6) will contain data, and for 9-bit the 9 MSbs (bits 15
through 7) will contain data, and all unused LSbs will contain 0s. Table 3 gives examples of 12-bit resolution digital
output data and the corresponding temperatures.
Figure 3. Temperature, T
OS
, and T
HYST
Register Format
bit 15
bit 14
MS Byte
S
2
6
bit 7
bit 6
LS Byte
2
-1
2
-2
bit 13
2
5
bit 12
2
4
bit 11
2
3
bit 10
2
2
bit 9
2
1
bit 8
2
0
bit 5
2
-3
bit 4
2
-4
bit 3
0
bit 2
0
bit 1
0
bit 0
0
Table 2. 12-Bit Resolution Temperature/Data Relationship
TEMPERATURE ( C)
DIGITAL OUTPUT
(BINARY)
0111 1101 0000 0000
0001 1001 0001 0000
0000 1010 0010 0000
0000 0000 1000 0000
0000 0000 0000 0000
1111 1111 1000 0000
1111 0101 1110 0000
1110 0110 1111 0000
1100 1001 0000 0000
DIGITAL OUTPUT
(HEX)
7D00h
1910h
0A20h
0080h
0000h
FF80h
F5E0h
E6F0h
C900h
+125
+25.0625
+10.125
+0.5
0
-0.5
-10.125
-25.0625
-55
SHUTDOWN MODE
For power-sensitive applications, the DS75LV offers a low-power shutdown mode. The SD bit in the configuration
register controls shutdown mode. When SD is changed to 1, the conversion in progress will be completed and the
result stored in the temperature register after which the DS75LV will go into a low-power standby state. The O.S.
output will be cleared if the thermostat is operating in interrupt mode and O.S will remain unchanged in comparator
mode. The 2-wire interface remains operational in shutdown mode, and writing a 0 to the SD bit returns the
DS75LV to normal operation.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS75LVU | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| DS75LVU/T&R | 制造商:Maxim Integrated Products 功能描述:2 WIRE THERMAL WATCHDOG MSOP T&R - Tape and Reel |
| DS75LVU/T&R | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| DS75LVU+ | 功能描述:板上安裝溫度傳感器 Low-Voltage Digital RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| DS75LVU+T&R | 制造商:Maxim Integrated Products 功能描述:TEMP SENSOR DGTL 2-WIRE 8USOP - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC SENSOR TEMP DIGITAL 8MSOP |
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