RCV420KP

RCV420 BURR-BROWN | Alldatasheet

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Technical content

APPLICATIONS

FEATURES

l COMPLETE 4-20mA TO 0-5V CONVERSION l INTERNAL SENSE RESISTORS l PRECISION 10V REFERENCE l BUILT-IN LEVEL-SHIFTING l ±40V COMMON-MODE INPUT RANGE l 0.1% OVERALL CONVERSION ACCURACY l HIGH NOISE IMMUNITY: 86dB CMR 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.

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 R S 75Ω R S 75Ω –In 16 4 12 V+ V– Ref In C T +In 100kΩ RCV420 1.01kΩ 99kΩ 11.5kΩ300kΩ 300kΩ +10V Ref Rcv f B Rcv Out Ref Out Ref f B Ref Trim Ref Noise Reduction 13 5 Rcv Com Ref Com 92kΩ International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111 Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132 RCV420 © 1988 Burr-Brown Corporation PDS-837E Printed in U.S.A. October, 1997

At T = +25°C and VS = ±15V, unless otherwise noted. RCV420KP, JP CHARACTERISTICS MIN TYP MAX UNITS GAIN Initial 0.3125 V/mA Error 0.05 0.15 % of span Error—JP Grade 0.25 % of span vs Temp 15 ppm/ °C Nonlinearity (1) 0.0002 0.002 % of span OUTPUT Rated Voltage (IO = +10mA, –5mA) 10 12 V Rated Current (EO = 10V) +10, –5 mA Impedance (Differential) 0.01 Ω Current Limit (To Common) +49, –13 mA Capacitive Load 1000 pF (Stable Operation) INPUT Sense Resistance 74.25 75 75.75 Ω Input Impedance (Common-Mode) 200 k Ω Common-Mode Voltage ±40 V CMR (2) 70 80 dB vs Temp (DC) (TA = TMIN to TMAX )7 6 d B AC 60Hz 80 dB OFFSET VOLTAGE (RTO) (3) Initial 1m V vs Temp 10 µV/°C vs Supply (±11.4V to ±18V) 74 90 dB vs Time 200 µV/mo ZERO ERROR (4) Initial 0.025 0.075 % of span Initial—JP Grade 0.15 % of span vs Temp 10 ppm of span/°C OUTPUT NOISE VOLTAGE fB = 0.1Hz to 10Hz 50 µVp-p fO = 10kHz 800 nV/ √Hz DYNAMIC RESPONSE Gain Bandwidth 150 kHz Full Power Bandwidth 30 kHz Slew Rate 1.5 V/ µs Settling Time (0.01%) 10 µs VOLTAGE REFERENCE Initial 9.99 10.01 V Trim Range (5) ±4% vs Temp 5 ppm/ °C vs Supply (±11.4V to ±18V) 0.0002 %/V vs Output Current (IO = 0 to +10mA) 0.0002 %/mA vs Time 15 ppm/kHz Noise (0.1Hz to 10Hz) 5 µVp-p Output Current +10, –2 mA POWER SUPPLY Rated ±15 V Voltage Range(6) –5, +11.4 ±18 V Quiescent Current (VO = 0V) 3 4 mA TEMPERATURE RANGE Specification 0 +70 °C Operation –25 +85 °C Storage –40 +85 °C Thermal Resistance, θJA 80 °C/W NOTES: (1) Nonlinearity is the max peak deviation from best fit straight line. (2) With 0 source impedance on Rcv Com pin. (3) Referred to output with all inputs grounded including Ref In. (4) With 4mA input signal and Voltage Reference connected (includes VOS , Gain Error, and Voltage Reference Errors). (5) External trim slightly affects drift. (6) IO Ref = 5mA, IO Rcv = 2mA.

NOTE: (1) Stresses above these ratings may cause permanent damage. ABSOLUTE MAXIMUM RATINGS (1) Rcv f Rcv Out Rcv Com Ref In Ref Out Ref f NC –In C +In Ref Com NC Ref Noise Reduction Ref Trim T B B PIN CONFIGURATION

ORDERING INFORMATION

RCV420KP 0 °C to +70°C 16-Pin Plastic DIP RCV420JP 0 °C to +70°C 16-Pin Plastic DIP Top View DIP The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant any BURR-BROWN product for use in life support devices and/or systems.

PACKAGE INFORMATION

PRODUCT PACKAGE NUMBER (1) RCV420KP 16-Pin Plastic DIP 180 RCV420JP 16-Pin Plastic DIP 180 NOTE: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix C of Burr-Brown IC Data Book.

TYPICAL PERFORMANCE CURVES At TA = +25°C, VS = ±15V, unless otherwise noted. STEP RESPONSE NO LOAD SMALL SIGNAL RESPONSE R L = ∞ , CL = 1000pF SMALL SIGNAL RESPONSE NO LOAD POSITIVE COMMON-MODE VOLTAGE RANGE vs POSITIVE POWER SUPPLY VOLTAGE Positive Power Supply Voltage (V) Positive Common-Mode Range (V) 12 13 14 15 16 17 18 19 20 Max Rating = 40V –VS = –5V to –20V TA = –55°C TA = +25°C TA = +125°C 11.4 NEGATIVE COMMON-MODE VOLTAGE RANGE vs NEGATIVE POWER SUPPLY VOLTAGE Negative Power Supply Voltage (V) Negative Common-Mode Range (V) –80 –70 –60 –50 –40 –30 –20 –10 –5 –20 Max Rating = –40V +VS = +11.4V to +20V TA = +25°C TA = –55°C to +125°C –10 –15 COMMON-MODE REJECTION vs FREQUENCY Frequency (Hz) CMR (dB) 100 1 10 100 1k 10k 100k POWER-SUPPLY REJECTION vs FREQUENCY Frequency (Hz) PSR (dB) 100 1 10 100 1k 10k 100k V+ V–

12 Ref In

15 Rcv f

14 Rcv Out

7 Ref Noise Reduction

8 Ref Trim

10 Ref fB

11 Ref Out

NOTE: (1) Typical values. See text. FIGURE 2. Optional Gain Adjustment. shifting, then it must be grounded to maintain high CMR. Figure 2 shows the circuit for adjusting the RCV420 gain. Figure 2. The adjusted gain is given by the following FIGURE 1. Basic Power Supply and Signal Connections. common-mode signal capabilities.

14 VRCV420

FIGURE 10. Series 4-20mA Receivers. FIGURE 13. Power Supply Current Monitor Circuit. FIGURE 12. 4-20mA to 5-0V Conversion. R CM and a 100Ω potentiometer for RG . TABLE 1. Typical Values for RCM and RG . FIGURE 11. Differential Current-to-Voltage Converter.