- 您现在的位置：买卖IC网 > PDF目录67358 > ADT7461AARMZ-2RL7 (ON SEMICONDUCTOR) DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 2.5Cel, SQUARE, SURFACE MOUNT PDF资料下载
参数资料
| 型号： | ADT7461AARMZ-2RL7 |
| 厂商： | ON SEMICONDUCTOR |
| 元件分类： | 温度/湿度传感器 |
| 英文描述： | DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 2.5Cel, SQUARE, SURFACE MOUNT |
| 封装： | LEAD FREE MSOP-8 |
| 文件页数： | 18/19页 |
| 文件大小： | 276K |
| 代理商： | ADT7461AARMZ-2RL7 |
ADT7461A
http://onsemi.com
8
chopperstabilized amplifier. This amplifies and rectifies
the waveform to produce a dc voltage proportional to
DVBE.
The ADC digitizes this voltage producing a temperature
measurement. To reduce the effects of noise, digital filtering
is performed by averaging the results of 16 measurement
cycles for low conversion rates. At rates of 16, 32, and
64conversions/second, no digital averaging occurs.
Signal conditioning and measurement of the internal
temperature sensor are performed in the same manner.
Figure 14. Input Signal Conditioning
VDD
IBIAS
N2 y I
I
BIAS
DIODE
D+
D–
C11
1CAPACITOR C1 IS OPTIONAL. IT IS ONLY NECESSARY IN NOISY ENVIRONMENTS.
REMOTE
SENSING
TRANSISTOR
fC = 65kHz
VOUT+
VOUT–
TO ADC
N1 y I
C1 = 1000pF MAX.
Temperature Measurement Results
The results of the local and remote temperature
measurements are stored in the local and remote temperature
value registers and compared with limits programmed into
the local and remote high and low limit registers.
The local temperature value is in Register 0x00 and has a
resolution of 1
°C. The external temperature value is stored
in two registers, with the upper byte in Register 0x01 and the
lower byte in Register 0x10. Only the two MSBs in the
external temperature low byte are used giving the external
temperature measurement a resolution of 0.25
°C. Table 2
lists the data format for the external temperature low byte.
Table 2. Extended Temperature Resolution
(Remote Temperature Low Byte
Extended Resolution
Remote Temperature Low Byte
0.00°C
0 000 0000
0.25°C
0 100 0000
0.50°C
1 000 0000
0.75°C
1 100 0000
When reading the full external temperature value, read the
LSB first. This causes the MSB to be locked (that is, the
ADC does not write to it) until it is read. This feature ensures
that the results read back from the two registers come from
the same measurement.
Temperature Measurement Range
The temperature measurement range for both internal and
external measurements is, by default, 0
°C to +127°C.
However, the ADT7461A can be operated using an
extended temperature range. The extended measurement
range is 64
°C to +191°C. Therefore, the ADT7461A can be
used to measure the full temperature range of an external
diode, from 55
°C to +150°C.
The extended temperature range is selected by setting Bit
2 of the configuration register to 1. The temperature range
is 0
°C to 127°C when Bit 2 equals 0. A valid result is
available in the next measurement cycle after changing the
temperature range.
In extended temperature mode, the upper and lower
temperature that can be measured by the ADT7461A is
limited by the remote diode selection. The temperature
registers can have values from 64
°C to +191°C. However,
most temperature sensing diodes have a maximum
temperature range of 55
°C to +150°C. Above +150°C, they
may lose their semiconductor characteristics and
approximate conductors instead. This results in a diode
short. In this case, a read of the temperature result register
gives the last good temperature measurement. Therefore,
the temperature measurement on the external channel may
not be accurate for temperatures that are outside the
operating range of the remote sensor.
It should be noted that although both local and remote
temperature measurements can be made while the part is in
extended temperature mode, the ADT7461A itself should
not be exposed to temperatures greater than those specified
in the absolute maximum ratings section. Further, the device
is only guaranteed to operate as specified at ambient
temperatures from 40
°C to +120°C.
Temperature Data Format
The ADT7461A has two temperature data formats. When
the temperature measurement range is from 0
°C to 127°C
(default), the temperature data format for both internal and
external temperature results is binary. When the measurement
range is in extended mode, an offset binary data format is used
for both internal and external results. Temperature values are
offset by 64
°C in the offset binary data format. Examples of
temperatures in both data formats are shown in Table 3.
相关PDF资料 |
PDF描述 |
|---|---|
| ADT7461AARMZ-002 | DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 2.5Cel, SQUARE, SURFACE MOUNT |
| ADT7470ARQZ | DIGITAL TEMP SENSOR-SERIAL, 7BIT(s), RECTANGULAR, SURFACE MOUNT |
| ADT7473ARQZ-1REEL7 | DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 2.50Cel, RECTANGULAR, SURFACE MOUNT |
| ADT7473ARQZ-1REEL | DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 2.50Cel, RECTANGULAR, SURFACE MOUNT |
| ADT7476ARQZ-REEL7 | DIGITAL TEMP SENSOR-SERIAL, 10BIT(s), 2.50Cel, RECTANGULAR, SURFACE MOUNT |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADT7461AARMZ-R | 功能描述:板上安装温度传感器 1 TMP DIO MON W/SMBUS ITF 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 |
| ADT7461AARMZ-REEL | 功能描述:IC SENSOR TEMP DGTL 2CH 8-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热管理 系列:- 标准包装:1 系列:- 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:-40°C ~ 125°C，外部传感器 精确度:±2.5°C 本地（最大值），±5°C 远程（最大值） 拓扑:ADC，比较器，寄存器库 输出类型:2 线 SMBus? 输出警报:无 输出风扇:无 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-8 供应商设备封装:SOT-23-8 包装:Digi-Reel® 其它名称:296-22675-6 |
| ADT7461AARMZ-REEL7 | 功能描述:IC SENSOR TEMP DGTL 2CH 8-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热管理 系列:- 标准包装:1 系列:- 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:-40°C ~ 125°C，外部传感器 精确度:±2.5°C 本地（最大值），±5°C 远程（最大值） 拓扑:ADC，比较器，寄存器库 输出类型:2 线 SMBus? 输出警报:无 输出风扇:无 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-8 供应商设备封装:SOT-23-8 包装:Digi-Reel® 其它名称:296-22675-6 |
| ADT7461AARMZ-RL7 | 功能描述:板上安装温度传感器 1 TMP DIO MON W/SMBUS ITF 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 |
| ADT7461AEBZEVB | 功能描述:BOARD EVAL FOR ADT7461 RoHS:是 类别:编程器，开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 传感器类型:CMOS 成像，彩色（RGB） 传感范围:WVGA 接口:I²C 灵敏度:60 fps 电源电压:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相关产品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP |
发布紧急采购，3分钟左右您将得到回复。