DS1822+T

更新时间： 2024-02-19 02:42:25

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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中文翻译

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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

is available in Application Note 27 entitled Understanding and Using Cyclic Redundancy Checks with

Dallas Semiconductor Touch Memory Products.

INPUT

CRC GENERATOR Figure 9

XOR

(MSB)

(LSB)

1-WIRE BUS SYSTEM

The 1-Wire bus system uses a single bus master to control one or more slave devices. The DS1822 is

always a slave. When there is only one slave on the bus, the system is referred to as a “single-drop”

system; the system is “multidrop” if there are multiple slaves on the bus.

All data and commands are transmitted least significant bit first over the 1-Wire bus.

The following discussion of the 1-Wire bus system is broken down into three topics: hardware

configuration, transaction sequence, and 1-Wire signaling (signal types and timing).

HARDWARE CONFIGURATION

The 1-Wire bus has by definition only a single data line. Each device (master or slave) interfaces to the

data line via an open drain or 3-state port. This allows each device to “release” the data line when the

device is not transmitting data so the bus is available for use by another device. The 1-Wire port of the

DS1822 (the DQ pin) is open drain with an internal circuit equivalent to that shown in Figure 10.

The 1-Wire bus requires an external pullup resistor of approximately 5 kΩ; thus, the idle state for the 1-

Wire bus is high. If for any reason a transaction needs to be suspended, the bus MUST be left in the idle

state if the transaction is to resume. Infinite recovery time can occur between bits so long as the 1-Wire

bus is in the inactive (high) state during the recovery period. If the bus is held low for more than 480μs,

all components on the bus will be reset.

HARDWARE CONFIGURATION Figure 10

V_PU

DS1822 1-WIRE PORT

4.7k

1-wire Bus

R_X

5μA

Typ.

T_X

100Ω

MOSFET

T_X

R_X= RECEIVE

T_X= TRANSMIT

9 of 21

1...6 7 8910 11 12...21

中文翻译

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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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