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參數資料
| 型號： | DS1721U+T&R |
| 廠商： | Maxim Integrated |
| 文件頁數： | 6/17頁 |
| 文件大小： | 257K |
| 描述： | IC THERMOMETER/STAT DIG HP 8USOP |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 3,000 |
| 功能： | 溫度計，恒溫計 |
| 傳感器類型： | 內部 |
| 感應溫度： | -55°C ~ 125°C |
| 精確度： | ±2°C（最小值） |
| 拓撲： | ADC，比較器，寄存器庫 |
| 輸出類型： | 2 線串行，I²C?/SMBUS? |
| 輸出警報： | 是 |
| 輸出風扇： | 是 |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 工作溫度： | -55°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-TSSOP，8-MSOP（0.118"，3.00mm 寬） |
| 供應商設備封裝： | 8-uMAX |
| 包裝： | 帶卷 (TR) |
DS1721
6 of 17
R0, R1 = Thermometer Resolution Bits. Table 3 below defines the resolution of the digital thermometer,
based on the settings of these two bits. There is a direct tradeoff between resolution and conversion time,
as depicted in the DC Electrical Characteristics: Digital Thermometer table. The designer has read/write
access to R0 and R1, and the default state is R0="1" and R1="1" (12-bit conversions).
THERMOMETER RESOLUTION CONFIGURATION Table 3
R1
R0
THERMOMETER
RESOLUTION
MAX
CONVERSION
TIME
0
0
9-BIT
93.75ms
0
1
10-BIT
187.5ms
1
0
11-BIT
375ms
1
1
12-BIT
750ms
X = Undefined. These bits are used internally by the DS1721.
DONE = Temperature Conversion Status Bit. "1" = conversion complete and "0" = conversion in
progress. The DONE bit is read-only, and the power-up state is "1". In the continuous conversion mode,
DONE = "0".
Thermostat Setpoints Programming
The thermostat registers (TH and TL) define the setpoints for operation of the TCOM output. The
respective register can be accessed over the 2-wire bus via the Access TH (A1h) or Access TL (A2h)
commands. Reading from or writing to the respective register is controlled by the state of the R/
W bit in
the 2-wire control byte (See 2-Wire Serial Data Bus section).
The format of the TH and TL registers is a 12-bit 2s complement representation of the temperature in 癈.
The user can program the number of bits (9, 10, 11, or 12) for each TH and TL that correspond to the
thermometer resolution configuration chosen. If the 9-bit mode is chosen, for example, the 3 least
significant bits of TH and TL will be ignored by the thermostat comparator. The format for both TH and
TL is shown in Figure 4. The power-up default of TH is 80癈 and that for TL is 75癈.
TEMPERATURE/DATA RELATIONSHIPS Figure 4
S
2
6
2
5
2
4
2
3
2
2
2
1
2
0
MSB
MSb
(UNIT = 癈)
LSb
2
-1
2
-2
2
-3
2
-4
0
0
0
0
LSB
TEMP
DIGITAL OUTPUT
(Binary)
DIGITAL OUTPUT
(Hex)
+80癈
0101 0000 0000 0000
5000h
+75癈
0100 1011 0000 0000
4B00h
+10.125癈
0000 1010 0010 0000
0A20h
+0.5癈
0000 0000 1000 0000
0080h
+0癈
0000 0000 0000 0000
0000h
-0.5癈
1111 1111 1000 0000
FF80h
-10.125癈
1111 0101 1110 0000
F5E0h
-25.0625癈
1110 0110 1111 0000
E6F0h
-55癈
1100 1001 0000 0000
C900h
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相關代理商/技術參數 |
參數描述 |
|---|---|
| DS1722 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Digital Thermometer with SPI/3-Wire Interface |
| DS1722S | 功能描述:板上安裝溫度傳感器 Digital Thermometer & Thermostat RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數字輸出 - 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 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
| DS1722S/T&R | 制造商:Maxim Integrated Products 功能描述:SPI 3-WIRE THERMOMETER SOIC T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC THERMOMETER DIG 3-WIRE 8-SOIC |
| DS1722S/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: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數字輸出 - 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 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
| DS1722S+ | 功能描述:板上安裝溫度傳感器 Digital Thermometer & Thermostat RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數字輸出 - 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 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
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