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DS1822Z+

更新时间： 2024-01-22 17:27:40
品牌 Logo 应用领域
美信 - MAXIM 传感器换能器温度传感器输出元件
页数 文件大小 规格书
21页 223K
描述
Econo 1-Wire Digital Thermometer

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DS1822Z+ 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：compliantECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：6 weeks
风险等级：1.59Samacsys 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

DS1822Z+ 数据手册

 浏览型号DS1822Z+的Datasheet PDF文件第1页浏览型号DS1822Z+的Datasheet PDF文件第3页浏览型号DS1822Z+的Datasheet PDF文件第4页浏览型号DS1822Z+的Datasheet PDF文件第5页浏览型号DS1822Z+的Datasheet PDF文件第6页浏览型号DS1822Z+的Datasheet PDF文件第7页 
DS1822  
ORDER INFORMATION  
ORDERING  
NUMBER  
DS1822  
PACKAGE  
DESCRIPTION  
MARKING  
1822  
DS1822 in 3-pin TO92  
DS1822/T&R  
DS1822+  
DS1822+T&R  
1822  
1822 (See Note)  
1822 (See Note)  
DS1822 in 3-pin TO92, 2000 Piece Tape-and-Reel  
DS1822 in Lead-Free 3-pin TO92  
DS1822 in Lead-Free 3-pin TO92, 2000 Piece Tape-and-  
Reel  
DS1822Z  
DS1822  
DS1822 in 150 mil 8-pin SO  
DS1822Z/T&R  
DS1822Z+  
DS1822Z+T&R  
DS1822  
DS1822 (See Note)  
DS1822 (See Note)  
DS1822 in 150 mil 8-pin SO, 2500 Piece Tape-and-Reel  
DS1822 in Lead-Free 150 mil 8-pin SO  
DS1822 in Lead-Free 150 mil 8-pin SO, 2500 Piece  
Tape-and-Reel  
Note: A “+” symbol will also be marked on the package.  
DETAILED PIN DESCRIPTIONS Table 1  
8-PIN SO*  
TO-92 SYMBOL DESCRIPTION  
5
4
1
2
GND  
DQ  
Ground.  
Data Input/Output pin. Open-drain 1-Wire interface pin. Also  
provides power to the device when used in parasite power mode  
(see “Parasite Power” section).  
3
3
VDD  
Optional VDD pin. VDD must be grounded for operation in  
parasite power mode.  
*All pins not specified in this table are “No Connect” pins.  
OVERVIEW  
Figure 1 shows a block diagram of the DS1822, and pin descriptions are given in Table 1. The 64-bit  
ROM stores the device’s unique serial code. The scratchpad memory contains the 2-byte temperature  
register that stores the digital output from the temperature sensor. In addition, the scratchpad provides  
access to the 1-byte upper and lower alarm trigger registers (TH and TL), and the 1-byte configuration  
register. The configuration register allows the user to set the resolution of the temperature-to-digital  
conversion to 9, 10, 11, or 12 bits. The TH, TL and configuration registers are NV (EEPROM), so they will  
retain data when the device is powered down.  
The DS1822 uses Dallas’ exclusive 1-Wire bus protocol that implements bus communication using one  
control signal. The control line requires a weak pullup resistor since all devices are linked to the bus via a  
3-state or open-drain port (the DQ pin in the case of the DS1822). In this bus system, the microprocessor  
(the master device) identifies and addresses devices on the bus using each device’s unique 64-bit code.  
Because each device has a unique code, the number of devices that can be addressed on one bus is  
virtually unlimited. The 1-Wire bus protocol, including detailed explanations of the commands and “time  
slots,” is covered in the 1-WIRE BUS SYSTEM section of this data sheet.  
Another feature of the DS1822 is the ability to operate without an external power supply. Power is instead  
supplied through the 1-Wire pullup resistor via the DQ pin when the bus is high. The high bus signal also  
charges an internal capacitor (CPP), which then supplies power to the device when the bus is low. This  
method of deriving power from the 1-Wire bus is referred to as “parasite power.” As an alternative, the  
DS1822 may also be powered by an external supply on VDD.  
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