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.11AD420—standard configuration
Fig.12AD5412/5422—in HART configuration
INPUT
16BIT DIGITALSerial Input
12BIT DIGITALSerial Input
16BIT DIGITALSerial 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,
Fig.6RCV42——4-20mA电流转0-5V电压实例
Fig.7XTR101--Precision, Low Drift4-20mA TWO-WIRE TRANSMITTER
Fig.8XTR106--4-20mA CURRENT TRANSMITTERwithBridgeExcitation and Linearization
IO= 10 [(VrefIn/16) + (VIN1/4) + (VIN2/2)] /RSPAN
IO= 10 × Vvin/Rset
PROBABLEPRICE
90元
10元
Fig.1XTR110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.2XTR111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
Fig.13AD694—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.14AM400—standard configuration
Fig.15AM460—standard configuration
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-CurrentConverter/Transmitter
NAME
XTR110
XTR111
SUPPLY RANGE
13.5V to 40V
7V to 44V
NONLINEARITY
0.005%
2.5V
4.096V
NC
LOW QUIESCENT CURRENT
200µA
130A
LOW SPAN ERROR
0.05%
LOW NONLINEARITY ERROR
0.003%
PROBABLE PRICE
20元
15元
Fig.4XTR115/XTR116/XTR117原理图
Fig.5RCV42——4-20mA电流转0-5V电压基本连接
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 RANGE
7.5V to 36V
7.5V to 40V
VREFFOR SENSOR EXCITATION
0 mA to 24Ma
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,
Fig.9XTR108--4-20mA, TWO-WIRE TRANSMITTER“Smart” Programmable with Signal Conditioning
Fig.10XTR300--Industrial Analog Current/VoltageOUTPUT DRIVER
（2）AD公司4-20mA电流输出芯片比较
Fig.16AM462—standard configuration
另查过Linear和MAXIM公司无相关产品
0.8mA
0.25mA
0.1mA
INPUTEXCITATION
2- OR 3-WIRE RTD OPERATION
OutputCurrent Equation
IO = VIN • (40/RG) + 4mA, VIN in Volts, RG in Ω
InputOffset Voltage
VCM = 2V
DAC and CurrentTransmitter
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
0.002%
INPUT
0V to +5V, 0V to +10V
0 to 12V
OUTPUT
0mA to 20mA, 5mA to 25ቤተ መጻሕፍቲ ባይዱA Outputs
Other Ranges
0mA–20mA, 4mA–20mA, 5mA–25mA ANDVOLTAGE OUTPUTS
OutputCurrent Equation