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参数资料
| 型号： | DS1721S+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 6/17页 |
| 文件大小： | 257K |
| 描述： | IC THERMOMETER/STAT DIG HP 8SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 功能： | 温度计，恒温计 |
| 传感器类型： | 内部 |
| 感应温度： | -55°C ~ 125°C |
| 精确度： | ±2°C（最小值） |
| 拓扑： | ADC，比较器，寄存器库 |
| 输出类型： | 2 线串行，I²C?/SMBUS? |
| 输出警报： | 是 |
| 输出风扇： | 是 |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -55°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1721S/T&R | 制造商:Maxim Integrated Products 功能描述:2-WIRE DIGITAL THERMOMETER SOIC T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC THERMOMETER/STAT DIG HP 8SOIC |
| DS1721S/T&R+W | 制造商:Maxim Integrated Products 功能描述:DIGITAL THERMOMETER AND THERMOSTAT - Tape and Reel |
| DS1721S/T&R | 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| DS1721S/T,R | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:2-Wire Digital Thermometer and Thermostat |
| DS1721S+ | 功能描述:板上安装温度传感器 Digital Thermometer & Thermostat RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
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