RCV420JPG4 Datasheet, PDF (1/12 Pages) Texas Instruments – Precision 4mA to 20mA CURRENT LOOP RECEIVER

®
RCV420
RCV420
SBVS019
Precision 4mA to 20mA
CURRENT LOOP RECEIVER
FEATURES
q COMPLETE 4-20mA TO 0-5V CONVERSION
q INTERNAL SENSE RESISTORS
q PRECISION 10V REFERENCE
q BUILT-IN LEVEL-SHIFTING
q ±40V COMMON-MODE INPUT RANGE
q 0.1% OVERALL CONVERSION ACCURACY
q HIGH NOISE IMMUNITY: 86dB CMR
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
APPLICATIONS
q PROCESS CONTROL
q INDUSTRIAL CONTROL
q FACTORY AUTOMATION
q DATA ACQUISITION
q SCADA
q RTUs
q ESD
q MACHINE MONITORING
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.
V+
16
RCV420
–In 1
300kΩ
R_S
75Ω
C_T 2
R_S
75Ω
+In 3
300kΩ
V–
Ref In
4
12
99kΩ
92kΩ
11.5kΩ
1.01kΩ
+10V
Ref
100kΩ
13
Rcv
Com
5
Ref
Com
15 Rcv f_B
14 Rcv Out
11 Ref Out
10 Ref f_B
8 Ref Trim
7 Ref Noise Reduction
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: [phone] • Twx: 910-952-1111
Internet: http://www.burr-brown.com/ • FAXLine: [phone] (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]
©_{1988 Burr-Brown Corporation}
PDS-1837E
®
RCV420 ^{Printed in U.S.A. October, 1997}