Datasheet > DS1775R/TR6

DS1775R/TR6

更新时间： 2022-11-26 02:05:28

品牌	Logo	应用领域
达拉斯 - DALLAS		监控
页数	文件大小	规格书
13页	233K
描述
SOT23-5 Digital Thermometer and Thermostat

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DS1775R/TR6 数据手册

DS1775

As a digital thermometer, the DS1775 is software compatible with the DS75 2–Wire Thermal Watchdog.

The DS1775 is assembled in a compact SOT23–5 package allowing for low–cost thermal

monitoring/control in space–constrained applications. The low thermal mass allows for time constants

previously only possible with thermistors.

Applications for the DS1775 include personal computers/servers/workstations, cellular telephones, office

equipment, or any thermally–sensitive system.

DETAILED PIN DESCRIPTION Table 1

SYMBOL DESCRIPTION

PIN 1

SCL

Clock input/output pin for 2-wire serial communication port. This input

should be tied to GND for standalone thermostat operation.

PIN 2

PIN 3

GND

O.S.

Ground pin.

Thermostat output Open-drain output becomes active when temperature

exceeds T_OS. Device configuration defines means to clear over-temperature

state.

PIN 4

PIN 5

V_DD

SDA

Supply Voltage 2.7V – 5.5V input power pin.

Data input/output pin for 2-wire serial communication port. In the standalone

thermostat mode, this input selects hysteresis.

OVERVIEW

A block diagram of the DS1775 is shown in Figure 1. The DS1775 consists of five major components:

1. Precision temperature sensor

2. Analog–to–digital converter

3. 2–wire interface electronics

4. Data registers

5. Thermostat comparator

The factory–calibrated temperature sensor requires no external components. Upon power–up, the DS1775

begins temperature conversions with the default resolution of 9 bits (0.5°C resolution). The host can

periodically read the value in the temperature register, which contains the last completed conversion. As

conversions are performed in the background, reading the temperature register does not affect the

conversion in progress.

In power–sensitive applications the user can put the DS1775 into a shutdown mode, under which the

sensor will complete and store the conversion in progress and revert to a low–power standby state. In

applications where small incremental temperature changes are critical, the user can change the conversion

resolution from 9 bits to 10, 11, or 12. Each additional bit of resolution approximately doubles the

conversion time. This is accomplished by programming the configuration register. The configuration

thermostat output, number of consecutive faults to trigger an alarm condition, and the method to

terminate an alarm condition.

The user can also program over–temperature (T_OS) and under–temperature (T_HYST) setpoints for

thermostatic operation. The power–up state of T_OSis 80°C and that for T_HYSTis 75°C. The result of each

temperature conversion is compared with the T_OSand T_HYSTsetpoints. The DS1775 offers two modes for

temperature control, the comparator mode and the interrupt mode. This allows the user the flexibility to

customize the condition that would generate and clear a fault condition. Regardless of the mode chosen,

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与DS1775R/TR6相关器件

型号	品牌	描述	获取价格	数据表
DS1775R/TR7	DALLAS	SOT23-5 Digital Thermometer and Thermostat	获取价格
DS1775R/TRL	DALLAS	SOT23-5 Digital Thermometer and Thermostat	获取价格
DS1775R+T&R	MAXIM	Serial Switch/Digital Sensor, 12 Bit(s), 2Cel, Rectangular, 5 Pin, Surface Mount, SOT-23,	获取价格
DS1775R+U	MAXIM	Serial Switch/Digital Sensor, 12 Bit(s), 2Cel, Rectangular, 5 Pin, Surface Mount, SOT-23,	获取价格
DS1775R+U	ROCHESTER	DIGITAL TEMP SENSOR-SERIAL, 12BIT(s), 2Cel, RECTANGULAR, SURFACE MOUNT, ROHS COMPLIANT, SO	获取价格
DS1775R1	MAXIM	Serial Switch/Digital Sensor, 9 Bit(s), 2Cel, Rectangular, Surface Mount, LEAD FREE, SOT-2	获取价格

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