DS1822+T

更新时间： 2024-02-07 22:29:09

品牌	Logo	应用领域
美信 - MAXIM		/
页数	文件大小	规格书
21页	223K
描述
Econo 1-Wire Digital Thermometer

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技术参数
数据手册

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DS1822+T 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+T 数据手册

DS1822

MEMORY

The DS1822’s memory is organized as shown in Figure 7. The memory consists of an SRAM scratchpad

with NV EEPROM storage for the high and low alarm trigger registers (T_Hand T_L) and configuration

purpose memory. All memory commands are described in detail in the DS1822 FUNCTION

COMMANDS section.

Byte 0 and byte 1 of the scratchpad contain the LSB and the MSB of the temperature register,

respectively. These bytes are read-only. Bytes 2 and 3 provide access to T_Hand T_Lregisters. Byte 4

contains the configuration register data, which is explained in detail in the CONFIGURATION

cannot be overwritten.

Byte 8 of the scratchpad is read-only and contains the cyclic redundancy check (CRC) code for bytes 0

through 7 of the scratchpad. The DS1822 generates this CRC using the method described in the CRC

GENERATION section.

Data is written to bytes 2, 3, and 4 of the scratchpad using the Write Scratchpad [4Eh] command; the data

must be transmitted to the DS1822 starting with the least significant bit of byte 2. To verify data integrity,

the scratchpad can be read (using the Read Scratchpad [BEh] command) after the data is written. When

reading the scratchpad, data is transferred over the 1-Wire bus starting with the least significant bit of

byte 0. To transfer the T_H, T_Land configuration data from the scratchpad to EEPROM, the master must

issue the Copy Scratchpad [48h] command.

Data in the EEPROM registers is retained when the device is powered down; at power-up the EEPROM

data is reloaded into the corresponding scratchpad locations. Data can also be reloaded from EEPROM to

the scratchpad at any time using the Recall E²[B8h] command. The master can issue read time slots

following the Recall E²command and the DS1822 will indicate the status of the recall by transmitting 0

while the recall is in progress and 1 when the recall is done.

DS1822 MEMORY MAP Figure 7

SCRATCHPAD (Power-up State)

byte 0 Temperature LSB (50h)

(85°C)

byte 1 Temperature MSB (05h)

byte 2 T_HRegister or User Byte 1*

byte 3 T_LRegister or User Byte 2*

byte 4 Configuration Register*

byte 5 Reserved (FFh)

EEPROM

T_HRegister or User Byte 1

T_LRegister or User Byte 2

Configuration Register

byte 6 Reserved

byte 7 Reserved (10h)

byte 8 CRC*

*Power-up state depends on value(s) stored

in EEPROM

7 of 21

1...4 5 678 9 10...21

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与DS1822+T相关器件

型号	品牌	描述	获取价格	数据表
DS1822+T&R	MAXIM	Econo 1-Wire Digital Thermometer	获取价格
DS1822-PAR	DALLAS	Econo 1-Wire?? Parasite-Power Digital Thermometer	获取价格
DS1822-PAR	ADI	经济型、寄生供电数字温度计	获取价格
DS1822-PAR/T&R	MAXIM	Serial Switch/Digital Sensor, 12 Bit(s), 2Cel, Rectangular, Through Hole Mount, TO-92, 3 P	获取价格
DS1822-PAR_07	DALLAS	Econo 1-Wire Parasite-Power Digital Thermometer	获取价格
DS1822-PAR+T&R	MAXIM	Serial Switch/Digital Sensor, 12 Bit(s), 2Cel, Rectangular, Through Hole Mount, TO-92, 3 P	获取价格

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