- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄67358 > ADT7486ARMZ-REEL (ANALOG DEVICES INC) DIGITAL TEMP SENSOR-SERIAL, 16BIT(s), 1Cel, SQUARE, SURFACE MOUNT PDF資料下載
參數(shù)資料
| 型號(hào)： | ADT7486ARMZ-REEL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | DIGITAL TEMP SENSOR-SERIAL, 16BIT(s), 1Cel, SQUARE, SURFACE MOUNT |
| 封裝： | LEAD FREE, PLASTIC, MO-187-BA, MSOP-10 |
| 文件頁(yè)數(shù)： | 4/16頁(yè) |
| 文件大?。?/td> | 177K |
| 代理商： | ADT7486ARMZ-REEL |
第1頁(yè)第2頁(yè)第3頁(yè)當(dāng)前第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)
ADT7484/ADT7486
Preliminary Technical Data
Rev. PrA | Page 12 of 16
SST TEMPERATURE SENSOR DATA FORMAT
The data for temperature is structured to allow values in the
range of ±512°C to be reported. Thus, the temperature sensor
format uses a twos complement, 16-bit binary value to represent
values in this range. This format allows temperatures to be
represented with approximately a 0.016°C resolution.
Table 13. SST Temperature Data Format
Twos Compliment
Temperature (°C)
MSB
LSB
125
1110 0000
1100 0000
80
1110 1100
0000 0000
40
1111 0110
0000 0000
20
1111 1011
0011 1110
5
1111 1110
1100 0000
1
1111 1111
1100 0000
0
0000 0000
+1
0000 0000
0100 0000
+5
0000 0001
0100 0000
+20
0000 0100
1100 0010
+40
0000 1010
0000 0000
+80
0001 0100
0000 0000
+125
0001 1111
0100 0000
USING DISCRETE TRANSISTORS
If a discrete transistor is used, the collector is not grounded and
should be linked to the base. If a PNP transistor is used, the
base is connected to the D1 input and the emitter is connected
to the D1+ input. If an NPN transistor is used, the emitter is
connected to the D1 input and the base is connected to the
D1+ input. Figure 15 shows how to connect the
ADT7484/ADT7486 to an NPN or PNP transistor for
temperature measurement. 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 D1 input.
D+
D–
ADT7484/
ADT7486
2N3904
NPN
D+
D–
ADT7484/
ADT7486
2N3906
PNP
05
19
8-
0
5
Figure 16. Connections for NPN and PNP Transistors
The ADT7484/ADT7486 show an external temperature value of
0x8000 if the external diode is an open or short circuit.
LAYOUT CONSIDERATIONS
Digital boards can be electrically noisy environments. Take the
following precautions to protect the analog inputs from noise,
particularly when measuring the very small voltages from a
remote diode sensor:
Place the device as close as possible to the remote sensing
diode. Provided that the worst noise sources, such as clock
generators, data/address buses, and CRTs, are avoided, this
distance can be four to eight inches.
Route the D1+ and D1 tracks close together in parallel
with grounded guard tracks on each side. Provide a ground
plane under the tracks if possible.
Use wide tracks to minimize inductance and reduce noise
pickup. A 5 mil track minimum width and spacing is
recommended.
5MIL
GND
D+
GND
D–
0
51
98
-0
0
6
Figure 17. Arrangements of Signal Tracks
Try to minimize the number of copper/solder joints, which
can cause thermocouple effects. Where copper/solder
joints are used, make sure that they are in both the D1+
and D1 paths and are at the same temperature.
Thermocouple effects should not be a major problem because
1°C corresponds to about 240 V, and thermocouple voltages
are about 3 V/°C of the temperature difference. Unless there
are two thermocouples with a big temperature differential
between them, thermocouple voltages should be much less
than 200 mV.
Place a 0.1 F bypass capacitor close to the device.
If the distance to the remote sensor is more than eight
inches, the use of a twisted-pair cable is recommended.
This works for distances of about six to 12 feet.
For very long distances (up to 100 feet), use shielded twisted-
pair cables, such as Belden #8451 microphone cables.
Connect the twisted-pair cable to D1+ and D1 and the
shield to GND, close to the device. Leave the remote end of
the shield unconnected to avoid ground loops.
Because the measurement technique uses switched current
sources, excessive cable and/or filter capacitance can affect the
measurement. When using long cables, the filter capacitor can
be reduced or removed. Cable resistance can also introduce
errors. A 1 series resistance introduces about 0.5°C error.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADT7486ARMZ-REEL7 | DIGITAL TEMP SENSOR-SERIAL, 16BIT(s), 1Cel, SQUARE, SURFACE MOUNT |
| ADT7484ARMZ-REEL7 | DIGITAL TEMP SENSOR-SERIAL, 16BIT(s), 1Cel, SQUARE, SURFACE MOUNT |
| ADT7484ARMZ-REEL | DIGITAL TEMP SENSOR-SERIAL, 16BIT(s), 1Cel, SQUARE, SURFACE MOUNT |
| AGB3300RS24Q1 | 250 MHz - 3000 MHz RF/MICROWAVE WIDE BAND MEDIUM POWER AMPLIFIER |
| AGR19030EF | L BAND, Si, N-CHANNEL, RF POWER, MOSFET |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADT7488A | 制造商:AD 制造商全稱:Analog Devices 功能描述:SST Digital Temperature Sensor and Voltage Monitor |
| ADT7488AARMZ-REEL | 功能描述:IC TEMP SENSOR SST DGTL 10-MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 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 |
| ADT7488AARMZ-REEL7 | 功能描述:IC TEMP/VOLT DGTL W/SST 10MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 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 |
| ADT7488AARMZ-RL | 功能描述:板上安裝溫度傳感器 TMP SNSR/VLTG MON W/SST INTERFACE 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 |
| ADT7488AARMZ-RL7 | 功能描述:板上安裝溫度傳感器 TMP SNSR/VLTG MON W/SST INTERFACE 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 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。