4-20mA电流环电压电流转换芯片方案比较.docx

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 Ranges0mA–20mA, 4mA–20mA, 5mA–25mA 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 CURRENT200μA130?ALOW SPAN ERROR0.05%LOW NONLINEARITY ERROR0.003%PROBABLE PRICE20元15元 Fig.4 XTR115/XTR116/XTR117原理图 Fig.5 RCV42——4-20mA电流转0-5V电压基本连接 Fig.6 RCV42——4-20mA电流转0-5V电压实例  Fig.7 XTR101--Precision, Low Drift 4-20mA TWO-WIRE TRANSMITTER Fig.8 XTR106-- 4-20mA CURRENT TRANSMITTER with Bridge Excitation and Linearization Fig.9 XTR108-- 4-20mA, TWO-WIRE TRANSMITTER “Smart” Programmable with Signal Conditioning Fig.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 TransmitterNAMEAD420AD5412AD5422AD694FUNCTIONDAC4–20 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 Ma 0 V to 5 V, 0 V to 10 V, ±5 V, ±10