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參數資料
型號: AD7707EB
廠商: Analog Devices, Inc.
英文描述: 3 V/5 V 610 V Input Range 1 mW 3-Channel 16-Bit Sigma-Delta ADC(316.51 k)
中文描述: 3伏/ 5伏610 V輸入范圍1毫瓦3通道16位Σ-Δ模數轉換器(316.51十一)
文件頁數: 35/40頁
文件大小: 316K
代理商: AD7707EB
REV. A
AD7707
–35–
Pressure Measurement
Other typical applications for the AD7707 include temperature
and pressure measurement. Figure 27 shows the AD7707 used
with a pressure transducer, the BP01 from Sensym. The
pressure transducer is arranged in a bridge network and gives a
differential output voltage between its OUT(+) and OUT(–)
terminals. With rated full-scale pressure (in this case 300mmHg)
on the transducer, the differential output voltage is 3mV/V of
the input voltage (i.e., the voltage between its IN(+) and IN(–)
terminals). Assuming a 5V excitation voltage, the full-scale
output range from the transducer is 15 mV. The low level input
channels are ideal for this type of low signal measurement appli-
cation. The excitation voltage for the bridge is also used to
generate the reference voltage for the AD7707. Therefore,
variations in the excitation voltage do not introduce errors in
the system. Choosing resistor values of 24 k
and 15 k
, as
per Figure 27, gives a 1.92 V reference voltage for the AD7707
when the excitation voltage is 5V.
Using the part with a programmed gain of 128 results in the
full-scale input span of the AD7707 being 15mV, which corre-
sponds with the output span from the transducer.
AD7707
DV
DD
+5V
REF IN(–)
AGND
MCLK IN
MCLK OUT
DRDY
REF IN(+)
24k
V
AV
DD
AIN1
LOCOM
DGND
OUT(–)
SCLK
DIN
DOUT
CS
CONTROLLER
15k
V
OUT(+)
EXCITATION VOLTAGE = +5V
IN(–)
IN(+)
Figure 27. Pressure Measurement Using the AD7707
Thermocouple Measurement
Another application area for the AD7707 is in temperature
measurement. Figure 28 outlines a connection from a thermo-
couple to the AD7707. In this application, the AD7707 is oper-
ated in its unbuffered mode to accommodate signals of
±
100 mV
on the front end. Cold conjunction compensation is imple-
mented using the AD590 temperature transducer that produces
an output current proportional to absolute temperature.
AD7707
DV
DD
+5V
AIN2
REF IN(–)
AGND
MCLK IN
MCLK OUT
DRDY
REF IN(+)
8.2k
V
CJC
AV
DD
AD590
+5V
AIN1
LOCOM
DGND
OUT
SCLK
DIN
DOUT
THERMOCOUPLE
JUNCTION
CS
CONTROLLER
REF192
+5V
GND
Figure 28. Thermocouple Measurement Using the
AD7707
相關PDF資料
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相關代理商/技術參數
參數描述
AD7708 制造商:AD 制造商全稱:Analog Devices 功能描述:8-/10-Channel, Low Voltage, Low Power, ADCs
AD7708BR 功能描述:IC ADC 16BIT R-R 8/10CH 28-SOIC RoHS:否 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1,000 系列:- 位數:16 采樣率(每秒):45k 數據接口:串行 轉換器數目:2 功率耗散(最大):315mW 電壓電源:模擬和數字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC(0.295",7.50mm 寬) 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數目和類型:2 個單端,單極
AD7708BR-REEL 功能描述:IC ADC 16BIT R-R 8/10CH 28-SOIC RoHS:否 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1,000 系列:- 位數:16 采樣率(每秒):45k 數據接口:串行 轉換器數目:2 功率耗散(最大):315mW 電壓電源:模擬和數字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC(0.295",7.50mm 寬) 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數目和類型:2 個單端,單極
AD7708BR-REEL7 功能描述:IC ADC 16BIT R-R 8/10CH 28-SOIC RoHS:否 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1,000 系列:- 位數:16 采樣率(每秒):45k 數據接口:串行 轉換器數目:2 功率耗散(最大):315mW 電壓電源:模擬和數字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC(0.295",7.50mm 寬) 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數目和類型:2 個單端,單極
AD7708BRU 功能描述:IC ADC 16BIT R-R 8/10CH 28-TSSOP RoHS:否 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1,000 系列:- 位數:16 采樣率(每秒):45k 數據接口:串行 轉換器數目:2 功率耗散(最大):315mW 電壓電源:模擬和數字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC(0.295",7.50mm 寬) 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數目和類型:2 個單端,單極
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