4-20mA电流环、电压电流转换芯片方案比较

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/Transmitter NAME XTR110 XTR111 SUPPLY RANGE to 40V7V to 44V NONLINEARITY%% INPUT0V to +5V, 0V to +10V0 to 12V

OUTPUT 0mA to 20mA, 5mA to 25mA Outputs

Other Ranges

0mA–20mA, 4mA–20mA,

5mA–25mA AND VOLTAGE

OUTPUTS

Output Current Equation I O = 10 [(Vref In/16) + (VIN1/4) +

(VIN2/2)] /RSPAN

I O = 10 × Vvin/Rset

PROBABLE

PRICE

90元10元

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

XTR111 应用电路

4-20mA CURRENT TRANSMITTER

with Sensor Excitation and Linearization NAME XTR105XTR112XTR114 SUPPLY RANGE to 36V

PRECISION CURRENT SOURCES

INPUT EXCITATION2- OR 3-WIRE RTD OPERATION

Output Current Equation IO = VIN (40/RG) + 4mA, VIN in Volts, RG in Input Offset V oltage VCM = 2V

PROBABLE PRICE25元50元60元

XTR105/XTR112/XTR114原理图

4-20mA Current-Loop Transmitter

NAME XTR115XTR116XTR117 SUPPLY RANGE to 36V to 40V VFOR SENSOR EXCITATION NC LOW QUIESCENT CURRENT200μA130A LOW SPAN ERROR%

LOW NONLINEARITY ERROR%

PROBABLE PRICE20元15元

XTR115/XTR116/XTR117原理图

RCV42——4-20mA电流转0-5V电压基本连接RCV42——4-20mA电流转0-5V电压实例

XTR101--Precision, Low Drift 4-20mA TWO-WIRE TRANSMITTER

XTR106-- 4-20mA CURRENT TRANSMITTER with Bridge Excitation and Linearization

XTR108-- 4-20mA, TWO-WIRE TRANSMITTER “Smart” Programmable with Signal

Conditioning

XTR300-- Industrial Analog Current/V oltage OUTPUT DRIVER

（2）AD公司4-20mA电流输出芯片比较

DAC and Current Transmitter

NAME AD420AD5412AD5422AD694 FUNCTION DAC4–20 mA Transmitter RESOLUTION161216-

SUPPL Y

RANGE

12-32V A VDD: A VSS:V to 36 V

INPUT16BIT

DIGITAL

Serial Input

12BIT

DIGITAL

Serial Input

16BIT

DIGITAL

Serial Input

Precalibrated Input

Ranges:

0 V to 2 V, 0 V to 10 V

OUTPUT 4 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 V 4 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 V

4 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 V

4–20 mA, 0–20 mA

PROBABLE

PRICE

60元50元60元50元

AD420—standard configuration

AD5412/5422—in HART configuration AD694—standard configuration

（3）AMG公司4-20mA电流输出芯片比较

NAME DESCRIPTION PROBABL E PRICE

AM40050元AM46040元AM46240元