Datasheet > DS1822

DS1822

更新时间： 2024-01-03 13:12:35

品牌	Logo	应用领域
达拉斯 - DALLAS		/
页数	文件大小	规格书
20页	269K
描述
Econo 1-Wire Digital Thermometer

阅读下载

获取价格

技术参数
数据手册

如果您发现信息不准确，欢迎纠错

DS1822 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	包装说明：	SOP8,.25
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	Factory Lead Time：	6 weeks
风险等级：	1.59	Samacsys Description：	Board Mount Temperature Sensors Econo 1-Wire Digital Thermometer
最大精度（摄氏度）：	2 Cel	其他特性：	COMPLIANCE TO MIL-150
主体宽度：	3.91 mm	主体高度：	1.55 mm
主体长度或直径：	4.88 mm	外壳：	PLASTIC
JESD-609代码：	e3	安装特点：	SURFACE MOUNT
位数：	12	端子数量：	8
最大工作电流：	1.5 mA	最高工作温度：	125 °C
最低工作温度：	-55 °C	输出接口类型：	1-WIRE INTERFACE
封装主体材料：	PLASTIC/EPOXY	封装等效代码：	SOP8,.25
封装形状/形式：	RECTANGULAR	电源：	3.3/5 V
传感器/换能器类型：	TEMPERATURE SENSOR,SWITCH/DIGITAL OUTPUT,SERIAL	子类别：	Other Sensors/Transducers
最大供电电压：	5.5 V	最小供电电压：	3 V
表面贴装：	YES	端子面层：	Matte Tin (Sn)
端接类型：	SOLDER

DS1822 数据手册

DS1822

OPERATION—MEASURING TEMPERATURE

The core functionality of the DS1822 is its direct-to-digital temperature sensor. The resolution of the

temperature sensor is user-configurable to 9, 10, 11, or 12 bits, corresponding to increments of 0.5LC,

0.25LC, 0.125LC, and 0.0625LC, respectively. The default resolution at power-up is 12 bit. The DS1822

powers-up in a low-power idle state; to initiate a temperature measurement and A-to-D conversion, the

master must issue a Convert T [44h] command. Following the conversion, the resulting thermal data is

stored in the 2-byte temperature register in the scratchpad memory and the DS1822 returns to its idle

state. If the DS1822 is powered by an external supply, the master can issue “read-time slots” (see the 1-

WIRE BUS SYSTEM section) after the Convert T command and the DS1822 will respond by

transmitting 0 while the temperature conversion is in progress and 1 when the conversion is done. If the

DS1822 is powered with parasite power, this notification technique cannot be used since the bus must be

pulled high by a strong pullup during the entire temperature conversion. The bus requirements for parasite

power are explained in detail in the POWERING THE DS1822 section of this data sheet.

The DS1822 output temperature data is calibrated in degrees centigrade; for Fahrenheit applications, a

lookup table or conversion routine must be used. The temperature data is stored as a 16-bit sign-extended

two’s complement number in the temperature register (see Figure 2). The sign bits (S) indicate if the

temperature is positive or negative: for positive numbers S = 0 and for negative numbers S = 1. If the

DS1822 is configured for 12-bit resolution, all bits in the temperature register will contain valid data. For

11-bit resolution, bit 0 is undefined. For 10-bit resolution, bits 1 and 0 are undefined, and for 9-bit

resolution bits 2, 1 and 0 are undefined. Table 2 gives examples of digital output data and the

corresponding temperature reading for 12-bit resolution conversions.

TEMPERATURE REGISTER FORMAT Figure 2

bit 7

bit 6

bit 5

bit 4

bit 3

bit 2

bit 1

bit 0

2³

2²

2¹

2⁰

2^-1

2^-2

2^-3

2^-4

LS Byte

MS Byte

bit 15

bit 14

bit 13

bit 12

bit 11

bit 10

2⁶

bit 9

2⁵

bit 8

2⁴

TEMPERATURE/DATA RELATIONSHIP Table 2

TEMPERATURE DIGITAL OUTPUT DIGITAL OUTPUT

(Binary)

(Hex)

07D0h

0550h

0191h

00A2h

0008h

0000h

FFF8h

FF5Eh

FE6Fh

FC90h

+125°C

+85°C*

+25.0625°C

+10.125°C

+0.5°C

0°C

-0.5°C

-10.125°C

-25.0625°C

-55°C

0000 0111 1101 0000

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

*The power on reset value of the temperature register is +85°C

3 of 20

1 234 5 6 7...20

下载PDF

与DS1822相关器件

型号	品牌	描述	获取价格	数据表
DS1822/T&R	MAXIM	Serial Switch/Digital Sensor, 12 Bit(s), 2Cel, Rectangular, 3 Pin, Through Hole Mount, TO9	获取价格
DS1822/T&R	MAXIM	Econo 1-Wire Digital Thermometer	获取价格
DS1822_V01	MAXIM	Econo 1-Wire Digital Thermometer	获取价格
DS1822+	MAXIM	Econo 1-Wire Digital Thermometer	获取价格
DS1822+PAR	MAXIM	Serial Switch/Digital Sensor, 12 Bit(s), 2Cel, Rectangular, 3 Pin, Through Hole Mount, TO-	获取价格
DS1822+T	MAXIM	Econo 1-Wire Digital Thermometer	获取价格

与DS1822相关文章

PCF8574资料解读：主要参数分析、引脚说明
2024-05-21

6
AD637数据手册解读：主要特性、引脚及其功能解读、电气参数
2024-05-21

5
ADUM1201资料手册解读：参数分析、引脚说明、应用分析
2024-05-21

8
一文带你了解压敏电阻器在直流电路中的过压保护作用
2024-05-21

4

产品中心

服务支持

精选活动

关于我们

帮助中心

DS1822

DS1822 技术参数

DS1822 数据手册

与DS1822相关器件

与DS1822相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

DS1822

DS1822 技术参数

DS1822 数据手册

与DS1822相关器件

与DS1822相关文章

您还可以找

您在本页遇到什么问题？