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 RANGE13.5V to 40V7V to 44V NONLINEARITY0.005%0.002% INPUT 0V to +5V, 0V to +10V 0 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
Fig.1 XTR110应用电路
XTR111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 TRANSMITTER with Sensor Excitation and Linearization NAME XTR105 XTR112 XTR114 SUPPLY RANGE7.5V to 36V
PRECISION CURRENT SOURCES0.8mA 0.25mA 0.1mA INPUT EXCITATION 2- OR 3-WIRE RTD OPERATION
IO = VIN • (40/RG) + 4mA, VIN in Volts, RG in Output Current Equation
Ω
Input Offset Voltage VCM = 2V
PROBABLE PRICE 25元50元60元
Fig.3XTR105/XTR112/XTR114原理图
4-20mA Current-Loop Transmitter
NAME XTR115 XTR116 XTR117 SUPPLY RANGE7.5V to 36V7.5V to 40V V REF FOR SENSOR EXCITATION 2.5V 4.096V NC LOW QUIESCENT CURRENT 200µA 130 A LOW SPAN ERROR 0.05%
LOW NONLINEARITY ERROR 0.003%
PROBABLE PRICE 20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 Transmitter
NAME AD420 AD5412 AD5422 AD694 FUNCTION DAC 4–20 mA Transmitter RESOLUTION16 12 16 - SUPPLY RANGE 12-32V AVDD:10.8-40V AVSS:-26.4-0V 4.5 V to 36 V
INPUT 16BIT 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 PRICE60元50元60元50元
Fig.11 AD420—standard configuration
Fig.12 AD5412/5422—in HART configuration
Fig.13 AD694—standard configuration
（3）AMG公司4-20mA电流输出芯片比较
NAME DESCRIPTION PROBABLE PRICE
AM400 50元AM460 40元AM462 40元
Fig.14 AM400—standard configuration
Fig.15 AM460—standard configuration
Fig.16 AM462—standard configuration
另查过Linear和MAXIM公司无相关产品。