DS1722S

更新时间： 2024-01-17 19:29:37

品牌	Logo	应用领域
达拉斯 - DALLAS		传感器换能器温度传感器输出元件
页数	文件大小	规格书
13页	986K
描述
IC-SM-DIGITAL THERMOMETER

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技术参数
数据手册

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DS1722S 技术参数

是否Rohs认证：	符合	生命周期：	Obsolete
包装说明：	TSSOP8,.19	Reach Compliance Code：	unknown
风险等级：	5.81	安装特点：	SURFACE MOUNT
端子数量：	8	最大工作电流：	0.5 mA
最高工作温度：	120 °C	最低工作温度：	-55 °C
封装主体材料：	PLASTIC/EPOXY	封装等效代码：	TSSOP8,.19
封装形状/形式：	RECTANGULAR	电源：	3/5 V
子类别：	Other Sensors	表面贴装：	YES
Base Number Matches：	1

DS1722S 数据手册

DS1722

The resolution of the temperature conversion is configurable (8, 9, 10, 11, or 12 bits), with 9-bit readings

the default state. This equates to a temperature resolution of 1.0°C, 0.5°C, 0.25°C, 0.125°C, or 0.0625°C.

Following each conversion, thermal data is stored in the thermometer register in two’s complement

format; the information can be retrieved over the SPI or 3-wire interface with the address set to the

temperature register, 01h (LSB) and then 02h (MSB). Table 2 describes the exact relationship of output

data to measured temperature. The table assumes the DS1722 is configured for 12-bit resolution; if the

device is configured in a lower resolution mode, those bits will contain 0s. The data is transmitted

serially over the digital interface, MSb first for SPI communication and LSb first for 3-wire

communication. The MSb of the temperature register contains the “sign” (S) bit, denoting whether the

temperature is positive or negative. For Fahrenheit usage, a lookup table or conversion routine must be

used.

Temperature/Data Relationships Table 2

Address

Location

2⁶

2⁵

2⁴

2³

(unit = °C)

2²

2¹

2⁰

LSb

02h

MSb

2^-1

2^-2

2^-3

2^-4

01h

DIGITAL OUTPUT

(BINARY)

DIGITAL OUTPUT

(HEX)

TEMPERATURE

0111 1000 0000 0000

0001 1001 0001 0000

0000 1010 0010 0000

0000 0000 1000 0000

0000 0000 0000 0000

1111 1111 1000 0000

1111 0101 1110 0000

1110 0110 1111 0000

1100 1001 0000 0000

7800h

1910h

0A20h

0080h

0000h

FF80h

F5E0h

E6F0h

C900h

+120°C

+25.0625°C

+10.125°C

+0.5°C

0°C

-0.5°C

-10.125°C

-25.0625°C

-55°C

OPERATION-Programming

The area of interest in programming the DS1722 is the Configuration register. All programming is done

via the SPI or 3-wire communication interface by selecting the appropriate address of the desired register

location. Table 3 illustrates the addresses for the two registers (configuration and temperature) of the

DS1722.

Read Address

Write Address

80h

Active Register

Configuration

Temperature LSB

Temperature MSB

00h

01h

02h

No access

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