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参数资料
| 型号： | DS1822Z |
| 厂商： | Maxim Integrated |
| 文件页数： | 2/21页 |
| 文件大小： | 0K |
| 描述： | IC THERMOMETER ECONO DIG 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 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： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
DS1822
ORDER INFORMATION
ORDERING PACKAGE
DESCRIPTION
NUMBER MARKING
DS1822 1822 DS1822 in 3-pin TO92
DS1822/T&R 1822 DS1822 in 3-pin TO92, 2000 Piece Tape-and-Reel
DS1822+ 1822 (See Note) DS1822 in Lead-Free 3-pin TO92
DS1822+T&R 1822 (See Note) DS1822 in Lead-Free 3-pin TO92, 2000 Piece Tape-and-
Reel
DS1822Z DS1822 DS1822 in 150 mil 8-pin SO
DS1822Z/T&R DS1822 DS1822 in 150 mil 8-pin SO, 2500 Piece Tape-and-Reel
DS1822Z+ DS1822 (See Note) DS1822 in Lead-Free 150 mil 8-pin SO
DS1822Z+T&R DS1822 (See Note) 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 GND
2 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 V DD Optional V DD pin. V DD 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 (T H and T L ), 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 T H , T L 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 (C PP ), 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 V DD .
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| DS1822Z/T&R | 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+ | 功能描述:板上安装温度传感器 1-Wire Digital Thermometer 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+ | 制造商:Maxim Integrated Products 功能描述:IC TEMP SENSOR 12BIT ?2 8-SOIC 制造商:Maxim Integrated Products 功能描述:IC, TEMP SENSOR, 12BIT, 2C, 8-SOIC |
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