Data Sheet
ADT7310
Rev. A | Page 23 of 24
APPLICATIONS INFORMATION
THERMAL RESPONSE TIME
The time required for a temperature sensor to settle to a
specified accuracy is a function of the thermal mass of the
sensor and the thermal conductivity between the sensor and
the object being sensed. Thermal mass is often considered
equivalent to capacitance. Thermal conductivity is commonly
specified using the symbol, Q, and can be thought of as thermal
resistance. It is commonly specified in units of degrees per watt
of power transferred across the thermal joint. The time required
for the part to settle to the desired accuracy is dependent on the
thermal contact established in that particular application, and
the equivalent power of the heat source. In most applications,
the settling time is best determined empirically.
SUPPLY DECOUPLING
The ADT7310 should be decoupled with a 0.1 礔 ceramic
capacitor between VDD and GND. This is particularly important
when the ADT7310 is mounted remotely from the power supply.
Precision analog products, such as the ADT7310, require a well-
filtered power source.
Because the ADT7310 operates from a single supply, it may
seem convenient to tap into the digital logic power supply.
Unfortunately, the logic supply is often a switch-mode design,
which generates noise in the 20 kHz to 1 MHz range. In addi-
tion, fast logic gates can generate glitches hundreds of millivolts
in amplitude due to wiring resistance and inductance.
If possible, the ADT7310 should be powered directly from the
system power supply. This arrangement, shown in Figure 24,
isolates the analog section from the logic-switching transients.
Even if a separate power supply trace is not available, generous
supply bypassing reduces supply-line induced errors. Local
supply bypassing consisting of a 0.1 礔 ceramic capacitor is
critical for the temperature accuracy specifications to be
achieved. This decoupling capacitor must be placed as close
as possible to the V
DD
pin of the ADT7310.
0.1礔
ADT7310
TTL/CMOS
LOGIC
CIRCUITS
POWER
SUPPLY
Figure 24. Use of Separate Traces to Reduce Power Supply Noise
TEMPERATURE MONITORING
The ADT7310 is ideal for monitoring the thermal environment
within hazardous automotive applications. The die accurately
reflects the exact thermal conditions that affect nearby
integrated circuits.
The ADT7310 measures and converts the temperature at the
surface of its own semiconductor chip. When the ADT7310 is
used to measure the temperature of a nearby heat source, the
thermal impedance between the heat source and the ADT7310
must be considered.
When the thermal impedance is determined, the temperature
of the heat source can be inferred from the ADT7310 output.
As much as 60% of the heat transferred from the heat source to
the thermal sensor on the ADT7310 die is discharged via the
copper tracks and the bond pads. Of the pads on the ADT7310,
the GND pad transfers most of the heat. Therefore, to measure
the temperature of a heat source, it is recommended that the
thermal resistance between the ADT7310 GND pad and the
GND of the heat source be reduced as much as possible.
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
ADT7461AARMZ-R
IC TEMP SENSOR DGTL 2CH 8-MSOP
ADT7461ARMZ-2R
IC TEMP SENSOR DGTL 2CH 8-MSOP
ADT7463ARQZ-REEL
IC REMOTE THERMAL CTRLR 24-QSOP
ADT7476AARQZ-R
IC REMOTE THERMAL CTLR 24QSOP
ADT7481ARMZ-1RL
IC SENSOR TEMP 2CH ALARM 10MSOP
ADT7482ARMZ-REEL
IC SENSOR TEMP 2CH ALARM 10MSOP
ADT7485AARMZ-R
IC TEMP/VOLT DGL SENS SST 10MSOP
ADT7486AARMZ-RL
IC TEMP SENS DGTL 2CH SST 10MSOP
相关代理商/技术参数
ADT7310TRZ-REEL
功能描述:IC TEMP SENS 16B DGTL SPI 8SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 热管理 系列:- 标准包装:2,500 系列:SilentSense™ 功能:温度监控系统（传感器） 传感器类型:内部和外部 感应温度:-55°C ~ 125°C，外部传感器 精确度:±2°C 本地（最大），±3°C 远程（最大） 拓扑:ADC（三角积分型），比较器，寄存器库 输出类型:I²C?/SMBus? 输出警报:是 输出风扇:是 电源电压:2.7 V ~ 5.5 V 工作温度:-55°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-MSOP 包装:带卷 (TR) 其它名称:MIC284-2BMMTRMIC284-2BMMTR-ND
ADT7310TRZ-REEL7
功能描述:IC TEMP SENS 16B DGTL SPI 8SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 热管理 系列:- 标准包装:2,500 系列:SilentSense™ 功能:温度监控系统（传感器） 传感器类型:内部和外部 感应温度:-55°C ~ 125°C，外部传感器 精确度:±2°C 本地（最大），±3°C 远程（最大） 拓扑:ADC（三角积分型），比较器，寄存器库 输出类型:I²C?/SMBus? 输出警报:是 输出风扇:是 电源电压:2.7 V ~ 5.5 V 工作温度:-55°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-MSOP 包装:带卷 (TR) 其它名称:MIC284-2BMMTRMIC284-2BMMTR-ND
ADT7311WTRZ
制造商:Analog Devices 功能描述:AUTOMOTIVE, ?0.5C ACCURATE, 16-BIT DIGITAL SPI TEMPERATURE - Rail/Tube
ADT7311WTRZ-RL
制造商:Analog Devices 功能描述:AUTOMOTIVE, ?0.5C ACCURATE, 16-BIT DIGITAL SPI TEMPERATURE - Tape and Reel
ADT7311WTRZ-RL7
制造商:Analog Devices 功能描述:AUTOMOTIVE, ?0.5C ACCURATE, 16-BIT DIGITAL SPI TEMPERATURE - Tape and Reel
ADT7312WCZ-PT7
功能描述:Temperature Sensor Digital, Local -55°C ~ 175°C 16 b 制造商:analog devices inc. 系列:- 包装:* 零件状态:在售 传感器类型:数字，本地 检测温度 - 本地:-55°C ~ 175°C 检测温度 - 远程:- 输出类型:SPI 电压 - 电源:2.7 V ~ 5.5 V 分辨率:16 b 特性:单触发，可编程极限，可编程分辨率，关断模式 精度 - 最高（最低）:±1°C（±1.5°C） 测试条件:-55°C ~ 175°C 工作温度:-55°C ~ 175°C 安装类型:表面贴装 封装/外壳:模具 供应商器件封装:* 标准包装:1
ADT7316
制造商:AD 制造商全称:Analog Devices 功能描述:SPI/I2C Compatible, 10-Bit Digital Temperature Sensor and Quad Voltage Output 12/10/8-Bit DAC
ADT7316ARQ
制造商:Analog Devices 功能描述:Digital Temperature Sensor 16-Pin QSOP 制造商:Rochester Electronics LLC 功能描述:DTS, 12-BIT QUAD VOLTAGE OUTPUT DAC I.C. - Bulk