Datasheet > DS1775R2+T&R

DS1775R2+T&R

更新时间： 2024-01-12 22:09:03

品牌	Logo	应用领域
美信 - MAXIM		输出元件传感器换能器
页数	文件大小	规格书
14页	465K
描述
Serial Switch/Digital Sensor, 12 Bit(s), 2Cel, Rectangular, 5 Pin, Surface Mount, SOT-23, 5 PIN

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DS1775R2+T&R 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	Reach Compliance Code：	unknown
风险等级：	5.66	最大精度（摄氏度）：	2 Cel
主体宽度：	1.625 mm	主体高度：	1.25 mm
主体长度或直径：	2.9 mm	外壳：	PLASTIC
JESD-609代码：	e3	安装特点：	SURFACE MOUNT
位数：	12	最大工作电流：	1 mA
最高工作温度：	125 °C	最低工作温度：	-55 °C
输出接口类型：	2-WIRE INTERFACE	封装形状/形式：	RECTANGULAR
传感器/换能器类型：	TEMPERATURE SENSOR,SWITCH/DIGITAL OUTPUT,SERIAL	最大供电电压：	5.5 V
最小供电电压：	2.7 V	表面贴装：	YES
端子面层：	TIN	端接类型：	SOLDER
Base Number Matches：	1

DS1775R2+T&R 数据手册

DS1775

Digital Thermometer and Thermostat in SOT23

assumes the DS1775 is configured for 12-bit resolution; if

the device is configured in a lower resolution mode, those

bits contain zeros. The data is transmitted serially over the

2-wire serial interface, MSb first. The MSb of the tempera-

ture 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.

Operation

Measuring Temperature

The core of DS1775 functionality is its direct-to-digital

temperature sensor. The DS1775 measures temperature

through the use of an on-chip temperature measurement

technique with an operating range from -55°C to +125°C.

Temperature conversions are initiated upon power-up, and

the most recent result is stored in the thermometer register.

Conversions are performed continuously unless the user

intervenes by altering the configuration register to put the

DS1775 into a shutdown mode. Regardless of the mode

used, the digital temperature can be retrieved from the

temperature register by setting the pointer to that location

(00h, power-up default). The DS1775 power-up default

has the sensor automatically performing 9-bit conversions

continuously. Details on how to change the settings after

power-up are contained in the Programming section.

Thermostat Control

In its comparator operating mode, the DS1775 functions

as a thermostat with programmable hysteresis, as shown

in Figure 2. When the DS1775’s temperature meets or

exceeds the value stored in the high temperature trip

by the configuration register, the output becomes active

and stays active until the first time that the temperature

falls below the temperature stored in the low temperature

trigger register (T

). In this way, any amount of hys-

HYST

teresis may be obtained. The DS1775 powers up in the

The resolution of the temperature conversion is configu-

rable (9, 10, 11, or 12 bits), with 9-bit readings the default

state. This equates to a temperature resolution of 0.5°C,

0.25°C, 0.125°C, or 0.0625°C. Following each conver-

sion, thermal data is stored in the thermometer register in

two’s complement format; the information can be retrieved

over the 2-wire interface with the device pointer set to the

temperature register. Table 1 describes the exact relation-

ship of output data to measured temperature. The table

comparator mode with T = +80°C and T = +75°C

HYST

and can be used as a stand-alone thermostat (no 2-wire

interface required) with those setpoints.

In the interrupt mode, the O.S. output first becomes active

following the programmed number of consecutive conver-

sions above T . The fault can only be cleared by either

setting the DS1775 in a shutdown mode or by reading any

) on

HYST

Table 1. Temperature/Data Relationships

2⁶

2⁵

2⁴

2³

2²

2¹

2⁰

LSb

MSB

LSB

MSb

2^-1

(UNIT = °C)

2^-2

2^-3

2^-4

TEMPERATURE

DIGITAL OUTPUT

(BINARY)

DIGITAL OUTPUT

(°C)

(HEX)

7D00h

1910h

0A20h

0080h

0000h

FF80h

F5E0h

E6F0h

C900h

+125

+25.0625

+10.125

+0.5

0111 1101 0000 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

-0.5

-10.125

-25.0625

-55

Maxim Integrated

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www.maximintegrated.com

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与DS1775R2+T&R相关器件

型号	品牌	描述	获取价格	数据表
DS1775R2+U	MAXIM	Serial Switch/Digital Sensor, 12 Bit(s), 2Cel, Rectangular, 5 Pin, Surface Mount, SOT-23,	获取价格
DS1775R2-U	MAXIM	Serial Switch/Digital Sensor, 12 Bit(s), 2Cel, Rectangular, 5 Pin, Surface Mount, SOT-23,	获取价格
DS1775R3&R	MAXIM	Serial Switch/Digital Sensor, 9 Bit(s), 2Cel, Rectangular, Surface Mount, LEAD FREE, SOT-2	获取价格
DS1775R3+U	MAXIM	Serial Switch/Digital Sensor, 12 Bit(s), 2Cel, Rectangular, 5 Pin, Surface Mount, SOT-23,	获取价格
DS1775R4&R	MAXIM	Serial Switch/Digital Sensor, 9 Bit(s), 2Cel, Rectangular, Surface Mount, LEAD FREE, SOT-2	获取价格
DS1775R4/T&R	MAXIM	Serial Switch/Digital Sensor, 12 Bit(s), 2Cel, Rectangular, 5 Pin, Surface Mount, SOT-23,	获取价格

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