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參數資料
型號: AD7705
廠商: Analog Devices, Inc.
英文描述: 3 V/5 V, 1 mW 2-/3-Channel 16-Bit, Sigma-Delta ADCs
中文描述: 3伏/ 5伏,1毫瓦2-/3-Channel 16位Σ-Δ模數轉換器
文件頁數: 30/32頁
文件大?。?/td> 264K
代理商: AD7705
AD7705/AD7706
–30–
REV. A
AD7705
V
DD
+5V
AIN1(+)
AIN1(–)
REF IN(–)
GND
MCLK IN
MCLK OUT
RESET
DRDY
DOUT DIN
CS
SCLK
REF IN(+)
6.25k
V
400
m
A
R
L1
R
L2
R
L3
R
L4
RTD
Figure 24. RTD Measurement Using the AD7705
Smart Transmitters
Another area where the low power, single supply, three-wire
interface capabilities is of benefit is in smart transmitters. Here,
the entire smart transmitter must operate from the 4mA to
20mA loop. Tolerances in the loop mean that the amount of
current available to power the transmitter is as low as 3.5mA.
The AD7705 consumes only 320
μ
A, leaving at least 3mA
available for the rest of the transmitter. Figure 25 shows a block
diagram of a smart transmitter which includes the AD7705. The
AD7705 with its dual input channel is ideally suited to systems
requiring an auxiliary channel whose measured variable is used
to correct that of the primary channel.
V
DD
GND
REF IN
ISOLATED SUPPLY
4.7
m
F
100k
V
MCLK IN
MCLK OUT
AD7705
ISOLATED GROUND
MICROCONTROLLER UNIT
PID
RANGE SETTING
CALIBRATION
LINEARIZATION
OUTPUT CONTROL
SERIAL COMMUNICATION
HART PROTOCOL
V
CC
COM
V
CC
BOOST
REF OUT1
REF OUT2
REF IN
AD421
C1 C2 C3
COM
LOOP
RTN
COMP
DRIVE
4.7
m
F
0.01
m
F
0.1
m
F
2.2
m
F
DN25D
1k
V
1000pF
0.01
m
F
0.01
m
F
0.0033
m
F
ISOLATION
BARRIER
SENSORS
RTD
mV
V
TC
MAIN TRANSMITTER ASSEMBLY
4mA
TO
20mA
Figure 25. Smart Transmitter Using the AD7705
相關PDF資料
PDF描述
AD7705BN ECONOLINE: REC2.2-S_DR/H1 - 2.2W DIP Package- 1kVDC Isolation- Regulated Output- UL94V-0 Package Material- Continuous Short Circiut Protection- Internal SMD design- 100% Burned In- Efficiency to 75%
AD7705BR ECONOLINE: REC2.2-S_DRW(Z)/H* - 2.2W DIP Package- 1kVDC Isolation- Regulated Output- 4.5-9V, 9-18V, 18-36V, 36-72V Wide Input Range 2 : 1- UL94V-0 Package Material- Continuous Short Circiut Protection- Cost Effective- 100% Burned In- Efficiency to 84%
AD7705BRU 3 V/5 V, 1 mW 2-/3-Channel 16-Bit, Sigma-Delta ADCs
AD7706 3 V/5 V, 1 mW 2-/3-Channel 16-Bit, Sigma-Delta ADCs
AD7706BN ECONOLINE: REC2.2-S_DRW(Z)/H* - 2.2W DIP Package- 1kVDC Isolation- Regulated Output- 4.5-9V, 9-18V, 18-36V, 36-72V Wide Input Range 2 : 1- UL94V-0 Package Material- Continuous Short Circiut Protection- Cost Effective- 100% Burned In- Efficiency to 84%
相關代理商/技術參數
參數描述
AD7705_06 制造商:AD 制造商全稱:Analog Devices 功能描述:3 V/5 V, 1 mW, 2-/3-Channel, 16-Bit, Sigma-Delta ADCs
AD7705BN 功能描述:IC ADC 16BIT 2CH 16-DIP 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
AD7705BNZ 功能描述:IC ADC 16BIT 2CH 16-DIP RoHS:是 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 其它有關文件:TSA1204 View All Specifications 標準包裝:1 系列:- 位數:12 采樣率(每秒):20M 數據接口:并聯 轉換器數目:2 功率耗散(最大):155mW 電壓電源:模擬和數字 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-TQFP 供應商設備封裝:48-TQFP(7x7) 包裝:Digi-Reel® 輸入數目和類型:4 個單端,單極;2 個差分,單極 產品目錄頁面:1156 (CN2011-ZH PDF) 其它名稱:497-5435-6
AD7705BNZ1 制造商:AD 制造商全稱:Analog Devices 功能描述:3 V/5 V, 1 mW, 2-/3-Channel, 16-Bit, Sigma-Delta ADCs
AD7705BR 功能描述:IC ADC 16BIT 2CH 16-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:12 采樣率(每秒):300k 數據接口:并聯 轉換器數目:1 功率耗散(最大):75mW 電壓電源:單電源 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC(0.295",7.50mm 寬) 供應商設備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數目和類型:1 個單端,單極;1 個單端,雙極
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