ChongMing Group (HK) Int'l Co., Ltd
CHONGMING GROUP (HK) INT'L CO., LTD.
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RCV420JP UART Interface IC Sensor Interface Precision 4-20mA Crnt Loop Rcvr
FEATURES
● COMPLETE 4-20mA TO 0-5V CONVERSION
● INTERNAL SENSE RESISTORS
● PRECISION 10V REFERENCE
● BUILT-IN LEVEL-SHIFTING
● ±40V COMMON-MODE INPUT RANGE
● 0.1% OVERALL CONVERSION ACCURACY
●HIGH NOISE IMMUNITY: 86dB CMR
APPLICATIONS
● PROCESS CONTROL
● INDUSTRIAL CONTROL
● FACTORY AUTOMATION
● DATA ACQUISITION
● SCADA
● RTUs
● ESD
● MACHINE MONITORING
DESCRIPTION
The RCV420 is a precision current-loop receiver de- signed to convert a 4–20mA input signal into a 0–5V output signal. As a monolithic circuit, it offers high reliability at low cost. The circuit consists of a pre- mium grade operational amplifier, an on-chip precision resistor network, and a precision 10V reference. The RCV420 features 0.1% overall conversion accuracy, 86dB CMR, and ±40V common-mode input range.
The circuit introduces only a 1.5V drop at full scale, which is useful in loops containing extra instrument burdens or in intrinsically safe applications where transmitter compliance voltage is at a premium. The 10V reference provides a precise 10V output with a typical drift of 5ppm/°C.
The RCV420 is completely self-contained and offers a highly versatile function. No adjustments are needed for gain, offset, or CMR. This provides three important advantages over discrete, board-level designs: 1) lower initial design cost, 2) lower manufacturing cost, and 3) easy, cost-effective field repair of a precision circuit.