器件名称: 1B22AN
功能描述: Programmable, Isolated Voltage-to-Current Converter
文件大小: 232.63KB 共4页
简 介:a
FEATURES Internal Isolated Loop Supply Drives 1000 Load Pin Programmable Inputs: 0 V to +5 V or 0 V to +10 V Pin Programmable Outputs: 4 to 20 mA or 0 to 20 mA High CMV Isolation: 1500 V RMS Normal-Mode Output Protection: 240 V RMS High Accuracy Low Offset Tempco: 300 nA/ C Low Gain Tempco: 50 ppm/ C Low Nonlinearity: 0.02% High CMR: 90 dB min Small Package: 1.0" 2.10" 0.35" Meets IEEE STD 472: CMV Transient Protection (SWC) APPLICATIONS Multichannel Process Control D/A Converter—Current Loop Interface Analog Transmitters and Controllers Remote Data Acquisition Systems GENERAL DESCRIPTION
Programmable, Isolated Voltage-to-Current Converter 1B22
FUNCTIONAL BLOCK DIAGRAM
IN1 IN2 4mA OFFSET S. NODE
RESISTOR NETWORK REF
1B22
SIGNAL ISOLATION DEMODULATOR
PROT
OUT HI OUT LO
MODULATOR
SYNC +15V –15V A. COM
POWER ISOLATION OSCILLATOR RECTIFIER/ LOOP SUPPLY
P. COM VLOOP
DESIGN FEATURES AND USER BENEFITS
The 1B22 is an isolated voltage-to-current converter that incorporates transformer isolation to achieve high performance and automated surface mount manufacturing for low cost and increased reliability. Designed for industrial applications, it is especially suited for harsh environments with extremely high common-mode interference. With programmable inputs and outputs, the 1B22 provides an unbeatable combination of versatility and performance in a compact plastic package. Functionally, the V/I converter consists of four basic sections: input conditioning, modulator/demo……
