电流环电压电流转换芯片专项方案比较.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/Transmitter
NAME
XTR110
XTR111
SUPPLY RANGE
13.5V to 40V
7V to 44V
NONLINEARITY
0.005%
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
IO = 10 [(Vref In/16) + (VIN1/4) + (VIN2/2)] /RSPAN
IO = 10 × Vvin/Rset
PROBABLE PRICE
90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输出电路，最惯用办法是采用两个电阻网络连接参照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 RANGE
7.5V to 36V
PRECISION CURRENT SOURCES
0.8mA
0.25mA
0.1mA
INPUT EXCITATION
2- OR 3-WIRE RTD OPERATION
Output Current Equation
IO = VIN • (40/RG) + 4mA，VIN in Volts，RG in Ω
Input Offset Voltage
VCM = 2V
PROBABLE PRICE
25元
50元
60元

Fig.3 XTR105/XTR112/XTR114原理图
4-20mA Current-Loop Transmitter
NAME
XTR115
XTR116
XTR117
SUPPLY RANGE
7.5V to 36V
7.5V to 40V
VREF FOR SENSOR EXCITATION
2.5V
4.096V
NC
LOW QUIESCENT CURRENT
200µA
130ìA
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
RESOLUTION
16
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 PRICE
60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

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