4-20mA电流环电压电流转换芯片方案比较.doc
-4-20mA电流输出芯片比拟1TI公司4-20mA电流输出芯片比拟Precision Voltage-to-Current Converter/TransmitterNAME*TR110*TR111SUPPLY RANGE13.5V to 40V7V to 44VNONLINEARITY0.005%0.002%INPUT0V to +5V, 0V to +10V0 to 12VOUTPUT0mA to 20mA, 5mA to 25mA OutputsOther Ranges0mA20mA, 4mA20mA, 5mA25mA AND VOLTAGE OUTPUTSOutput Current EquationIO = 10 (Vref In/16) + (VIN1/4) + (VIN2/2) /RSPANIO = 10 × Vvin/RsetPROBABLE PRICE90元10元Fig.1 *TR110应用电路*TR111部没有提供将0V输入转换成4mA输出的电路，最常用的方法是采用两个电阻网络连接参考电压和输入信号进展分压输入Fig.2 *TR111 应用电路. z.-4-20mA CURRENT TRANSMITTERwith Sensor E*citation and LinearizationNAME*TR105*TR112*TR114SUPPLY RANGE7.5V to 36VPRECISION CURRENT SOURCES0.8mA0.25mA0.1mAINPUT E*CITATION2- OR 3-WIRE RTD OPERATIONOutput Current EquationIO = VIN (40/RG) + 4mA, VIN in Volts, RG in Input Offset VoltageVCM = 2VPROBABLE PRICE25元50元60元Fig.3 *TR105/*TR112/*TR114原理图. z.-4-20mA Current-Loop TransmitterNAME *TR115*TR116*TR117SUPPLY RANGE7.5V to 36V7.5V to 40VVREF FOR SENSOR E*CITATION2.5V4.096VNCLOW QUIESCENT CURRENT200µA130ìALOW SPAN ERROR0.05%LOW NONLINEARITY ERROR0.003%PROBABLE PRICE20元15元Fig.4 *TR115/*TR116/*TR117原理图Fig.5 RCV424-20mA电流转0-5V电压根本连接Fig.6 RCV424-20mA电流转0-5V电压实例. z.-Fig.7 *TR101-Precision, Low Drift 4-20mA TWO-WIRE TRANSMITTERFig.8 *TR106- 4-20mA CURRENT TRANSMITTER with Bridge E*citation and LinearizationFig.9 *TR108- 4-20mA, TWO-WIRE TRANSMITTER “Smart Programmable with Signal ConditioningFig.10 *TR300- Industrial Analog Current/Voltage OUTPUT DRIVER. z.-2AD公司4-20mA电流输出芯片比拟DAC and Current TransmitterNAMEAD420AD5412AD5422AD694FUNCTIONDAC420 mA TransmitterRESOLUTION161216-SUPPLY RANGE12-32VAVDD:10.8-40V AVSS:-26.4-0V4.5 V to 36 VINPUT16BIT DIGITAL Serial Input12BIT DIGITAL Serial Input16BIT DIGITAL Serial InputPrecalibrated Input Ranges:0 V to 2 V, 0 V to 10 VOUTPUT4 mA to 20 mA, 0 mA to 20 mA,0 mA to 24 Ma0 V to 5 V, 0 V to 10 V, ±5 V, ±10 V4 mA to 20 mA, 0 mA to 20 mA,0 mA to 24 mA0 V to 5 V, 0 V to 10 V, ±5 V, ±10 V4 mA to 20 mA, 0 mA to 20 mA,0 mA to 24 mA0 V to 5 V, 0 V to 10 V, ±5 V, ±10 V420 mA, 020 mAPROBABLE PRICE60元50元60元50元Fig.11 AD420standard configurationFig.12 AD5412/5422in HART configurationFig.13 AD694standard configuration. z.-3AMG公司4-20mA电流输出芯片比拟NAMEDESCRIPTIONPROBABLE PRICEAM40050元AM46040元AM46240元. z.-Fig.14 AM400standard configurationFig.15 AM460standard configurationFig.16 AM462standard configuration另查过Linear和MA*IM公司无相关产品. z.
