4-20mA电流环、电压电流转换芯片方案比较.doc

4-20mA电流输出芯片比较（1）TI公司4-20mA电流输出芯片比较Precision Voltage-to-Current Converter/TransmitterNAMEXTR110XTR111SUPPLY 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 XTR110 应用电路XTR111内部没有提供将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行分压输入Fig.2 XTR111 应用电路4-20mA CURRENT TRANSMITTERwith Sensor Excitation and LinearizationNAMEXTR105XTR112XTR114SUPPLY RANGE7.5V to 36VPRECISION CURRENT SOURCES0.8mA0.25mA0.1mAINPUT EXCITATION2- 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 XTR105/XTR112/XTR114原理图4-20mA Current-Loop TransmitterNAME XTR115XTR116XTR117SUPPLY RANGE7.5V to 36V7.5V to 40VVREF FOR SENSOR EXCITATION2.5V4.096VNCLOW QUIESCENT CURRENT200A130ALOW SPAN ERROR0.05%LOW NONLINEARITY ERROR0.003%PROBABLE PRICE20元15元Fig.4 XTR115/XTR116/XTR117原理图Fig.5 RCV424-20mA电流转0-5V电压基本连接Fig.6 RCV424-20mA电流转0-5V电压实例Fig.7 XTR101-Precision, Low Drift 4-20mA TWO-WIRE TRANSMITTERFig.8 XTR106- 4-20mA CURRENT TRANSMITTER with Bridge Excitation and LinearizationFig.9 XTR108- 4-20mA, TWO-WIRE TRANSMITTER “Smart” Programmable with Signal ConditioningFig.10 XTR300- Industrial Analog Current/Voltage OUTPUT DRIVER（2）AD公司4-20mA电流输出芯片比较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（3）AMG公司4-20mA电流输出芯片比较NAMEDESCRIPTIONPROBABLE PRICEAM40050元AM46040元AM46240元Fig.14 A