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参数资料
| 型号： | DS1822-PAR+T&R |
| 厂商： | Maxim Integrated |
| 文件页数： | 4/19页 |
| 文件大小： | 0K |
| 描述： | IC THERMOMETER ECONO DIG TO-92 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,000 |
| 感应温度： | -55°C ~ 125°C |
| 输出类型： | 数字 |
| 电源电压： | 3 V ~ 5 V |
| 精确度： | ±2°C |
| 封装/外壳： | TO-226-3、TO-92-3（TO-226AA）成形引线 |
| 供应商设备封装： | TO-92-3 |
| 包装： | 带卷 (TR) |
DS1822-PAR
TEMPERATURE REGISTER FORMAT Figure 3
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
LS Byte
2
3
2
2
2
1
2
0
2
-1
2
-2
2
-3
2 -4
bit 15
bit 14
bit 13
bit 12
bit 11
bit 10
bit 9
bit 8
MS Byte
S
S
S
S
S
2
6
2
5
2 4
TEMPERATURE/DATA RELATIONSHIP Table 2
TEMPERATURE
+85°C*
+25.0625°C
+10.125°C
+0.5°C
0°C
-0.5°C
-10.125°C
-25.0625°C
-55°C
DIGITAL OUTPUT
(Binary)
0000 0101 0101 0000
0000 0001 1001 0001
0000 0000 1010 0010
0000 0000 0000 1000
0000 0000 0000 0000
1111 1111 1111 1000
1111 1111 0101 1110
1111 1110 0110 1111
1111 1100 1001 0000
DIGITAL OUTPUT
(Hex)
0550h
0191h
00A2h
0008h
0000h
FFF8h
FF5Eh
FE6Fh
FC90h
*The power-on reset value of the temperature register is +85°C
OPERATION—ALARM SIGNALING
After the DS1822-PAR performs a temperature conversion, the temperature value is compared to the
user-defined two’s complement alarm trigger values stored in the 1-byte T H and T L registers (see Figure
4). The sign bit (S) indicates if the value is positive or negative: for positive numbers S = 0 and for
negative numbers S = 1. The T H and T L registers are NV (EEPROM) so they will retain data when the
device is powered down. T H and T L can be accessed through bytes 2 and 3 of the scratchpad as explained
in the MEMORY section of this data sheet.
T H AND T L REGISTER FORMAT Figure 4
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
S
2
6
2
5
2
5
2
5
2
2
2
1
2 0
Only bits 11 through 4 of the temperature register are used in the T H and T L comparison since T H and T L
are 8-bit registers. If the measured temperature is lower than or equal to T L or higher than or equal to T H ,
an alarm condition exists and an alarm flag is set inside the DS1822-PAR. This flag is updated after every
temperature measurement; therefore, if the alarm condition goes away, the flag will be turned off after the
next temperature conversion.
The master device can check the alarm flag status of all DS1822-PARs on the bus by issuing an Alarm
Search [ECh] command. Any DS1822-PARs with a set alarm flag will respond to the command, so the
master can determine exactly which DS1822-PARs have experienced an alarm condition. If an alarm
condition exists and the T H or T L settings have changed, another temperature conversion should be done
to validate the alarm condition.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS-18-22-RS | 制造商:TE Connectivity 功能描述:Red sealed splice terminal,0.5-1.5sq.mm |
| DS1822-W | 制造商:Maxim Integrated Products 功能描述:1-WIRE DIGITAL THERMOMETER SOIC - Rail/Tube |
| DS1822Z | 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 |
| DS1822Z/T | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Econo 1-Wire Digital Thermometer |
| DS1822Z/T&R | 制造商:Maxim Integrated Products 功能描述:1-WIRE DIGITAL THERMOMETER SOIC T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC THERMOMETER ECONO DIG 8-SOIC |
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