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参数资料
型号： ADT7473ARQZ-1
厂商： ANALOG DEVICES INC
元件分类： 温度/湿度传感器
英文描述： DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 2.50Cel, RECTANGULAR, SURFACE MOUNT
封装： ROHS COMPLIANT, MO-137AB, QSOP-16
文件页数： 7/72页
文件大小： 1494K
代理商： ADT7473ARQZ-1
ADT7473/ADT7473-1
Rev. C | Page 15 of 72
Table 9. 10-Bit ADC Output Codes vs. VIN
ADC Output
VCC (3.3 VIN)1
VCCP
Decimal
Binary (10 Bits)
<0.0042
<0.00293
0
00000000 00
0.0042 to 0.0085
0.0293 to 0.0058
1
00000000 01
0.0085 to 0.0128
0.0058 to 0.0087
2
00000000 10
0.0128 to 0.0171
0.0087 to 0.0117
3
00000000 11
0.0171 to 0.0214
0.0117 to 0.0146
4
00000001 00
0.0214 to 0.0257
0.0146 to 0.0175
5
00000001 01
0.0257 to 0.0300
0.0175 to 0.0205
6
00000001 10
0.0300 to 0.0343
0.0205 to 0.0234
7
00000001 11
0.0343 to 0.0386
0.0234 to 0.0263
8
00000010 00
…
1.100 to 1.1042
0.7500 to 0.7529
256 ( scale)
01000000 00
…
2.200 to 2.2042
1.5000 to 1.5029
512 ( scale)
10000000 00
…
3.300 to 3.3042
2.2500 to 2.2529
768 ( scale)
11000000 00
…
4.3527 to 4.3570
2.9677 to 2.9707
1013
11111101 01
4.3570 to 4.3613
2.9707 to 2.9736
1014
11111101 10
4.3613 to 4.3656
2.9736 to 2.9765
1015
11111101 11
4.3656 to 4.3699
2.9765 to 2.9794
1016
11111110 00
4.3699 to 4.3742
2.9794 to 2.9824
1017
11111110 01
4.3742 to 4.3785
2.9824 to 2.9853
1018
11111110 10
4.3785 to 4.3828
2.9853 to 2.9882
1019
11111110 11
4.3828 to 4.3871
2.9882 to 2.9912
1020
11111111 00
4.3871 to 4.3914
2.9912 to 2.9941
1021
11111111 01
4.3914 to 4.3957
2.9941 to 2.9970
1022
11111111 10
>4.3957
>2.9970
1023
11111111 11
1 The VCC output codes listed assume that VCC is 3.3 V.
TEMPERATURE MEASUREMENT METHOD
A simple method of measuring temperature is to exploit the
negative temperature coefficient of a diode, measuring the base-
emitter voltage (VBE) of a transistor operated at constant
current. Unfortunately, this technique requires calibration to
null out the effect of the absolute value of VBE, which varies
from device to device.
The technique used in the ADT7473/ADT7473-1 measures
the change in VBE when the device is operated at three different
currents. Previous devices have used only two operating currents,
but the use of a third current allows automatic cancellation of
resistances in series with the external temperature sensor.
Figure 26 shows the input signal conditioning used to measure
the output of an external temperature sensor. This figure shows
the external sensor as a substrate transistor, but it could equally
be a discrete transistor. If a discrete transistor is used, the collec-
tor is not grounded and should be linked to the base. To prevent
ground noise from interfering with the measurement, the more
negative terminal of the sensor is not referenced to ground, but
is biased above ground by an internal diode at the D input.
C1 can optionally be added as a noise filter (recommended
maximum value 1000 pF). However, a better option in noisy
environments is to add a filter, as described in the Noise
Filtering section.
Local Temperature Measurement
The ADT7473/ADT7473-1 contains an on-chip band gap
temperature sensor whose output is digitized by the on-chip
10-bit ADC. The 8-bit MSB temperature data is stored in the
local temperature register (0x26). Because both positive and
negative temperatures can be measured, the temperature data is
stored in Offset 64 format or twos complement format, as
shown in Table 10 and Table 11. Theoretically, the temperature
sensor and ADC can measure temperatures from 63°C to
+127°C (or 63°C to +191°C in the extended temperature
range) with a resolution of +0.25°C. However, this exceeds the
operating temperature range of the device, so local temperature
measurements outside the ADT7473/ADT7473-1 operating
temperature range are not possible.
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相关代理商/技术参数
参数描述
ADT7473ARQZ-1R7 功能描述:马达/运动/点火控制器和驱动器 FAN CNTRLR/INT MON RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube
ADT7473ARQZ-1REEL 功能描述:IC THERM MON FAN CTRLR 16-QSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热管理 系列:dBCool® 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
ADT7473ARQZ-1REEL7 功能描述:IC THERM MON FAN CTRLR 16-QSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热管理 系列:dBCool® 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
ADT7473ARQZ-1RL 功能描述:板上安装温度传感器 FAN CNTRLR/INT MON 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
ADT7473ARQZ-REEL 功能描述:板上安装温度传感器 FAN CNTRLR/INT MON 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
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