參數(shù)資料
型號(hào)： ADT7473ARQZ-1REEL7
廠商： ANALOG DEVICES INC
元件分類： 溫度/濕度傳感器
英文描述： DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 2.50Cel, RECTANGULAR, SURFACE MOUNT
封裝： ROHS COMPLIANT, MO-137AB, QSOP-16
文件頁(yè)數(shù)： 7/72頁(yè)
文件大?。?/td> 1494K
代理商： ADT7473ARQZ-1REEL7
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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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADT7473ARQZ-1RL 功能描述:板上安裝溫度傳感器 FAN CNTRLR/INT MON RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor
ADT7473ARQZ-REEL 功能描述:板上安裝溫度傳感器 FAN CNTRLR/INT MON RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor
ADT7473ARQZ-REEL7 功能描述:IC REMOTE THERMAL CTRLR 16QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:dBCool® 標(biāo)準(zhǔn)包裝:1 系列:- 功能:溫度監(jiān)控系統(tǒng)（傳感器） 傳感器類型:內(nèi)部和外部 感應(yīng)溫度:-40°C ~ 125°C，外部傳感器 精確度:±2.5°C 本地（最大值），±5°C 遠(yuǎn)程（最大值） 拓?fù)?ADC，比較器，寄存器庫(kù) 輸出類型:2 線 SMBus? 輸出警報(bào):無(wú) 輸出風(fēng)扇:無(wú) 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-8 供應(yīng)商設(shè)備封裝:SOT-23-8 包裝:Digi-Reel® 其它名稱:296-22675-6
ADT7473ARQZ-RL7 功能描述:板上安裝溫度傳感器 FAN CNTRLR/INT MON RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor
ADT7473EBZEVB 功能描述:EVALUATION BOARD ADT7473 制造商:on semiconductor 系列:* 零件狀態(tài):在售 標(biāo)準(zhǔn)包裝:1
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