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Texas Instruments RCV420KP
- Part No.:
- RCV420KP
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
RCV420KP.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,418
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Product details
Overview
RCV420KP from Texas Instruments (formerly Burr-Brown) is a precision monolithic 4–20mA current-loop receiver IC that converts industrial loop current into a 0–5V output voltage with 0.1% overall conversion accuracy, ±40V common-mode input range, and 86dB CMR. It integrates premium op-amps, laser-trimmed 75Ω sense resistors, and a 10V reference, and is used in RTU analog input modules, SCADA field I/O units, and ESD safety system signal conditioning stages.
For engineers reviewing the RCV420KP datasheet, RCV420KP pinout, RCV420KP application, or RCV420KP equivalent, this page delivers verified technical context, exact pin functions, real-world application cards, and two validated alternative parts - all grounded in the official TI datasheet PDS-837E and SBVS019.
Technical Context
The RCV420KP implements a differential transimpedance architecture using matched internal 75Ω sense resistors and a high-precision amplifier to achieve 0.3125 V/mA gain (5V/16mA span), with built-in level-shifting via Ref In or Rcv Com pins. Its 10V reference provides 5ppm/°C drift and supports offset nulling and external trimming.
It operates over 0°C to +70°C, requires ±15V supply (±11.4V to ±18V range), introduces only 1.5V loop drop at full scale, and maintains stable performance with capacitive loads up to 1000pF. Common-mode rejection degrades minimally with frequency - 80dB at 60Hz and 76dB over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Range | 4–20mA loop current, compatible with standard industrial current transmitters |
| Output Range | 0–5V DC, directly interfaceable with ADCs, PLC analog inputs, and microcontroller voltage-sampling circuits |
| Conversion Accuracy | 0.1% of span (JP-grade variant), enabling high-fidelity process variable representation without calibration |
| Common-Mode Range | ±40V, allowing operation in noisy factory environments with ground potential differences across long cable runs |
| CMR | 86dB typical (DC), 80dB at 60Hz - suppresses induced noise from AC motors, VFDs, and power lines |
| Reference Voltage | 10.00V ±10mV (TYP), 5ppm/°C drift - enables precise level-shifting and offset compensation |
| Sense Resistance | 75Ω ±0.75Ω (74.25–75.75Ω), laser-trimmed for <0.01% matching - ensures differential rejection without external resistor matching |
Pinout & Package
RCV420KP is housed in a 16-pin plastic DIP (PDIP-N) package with 0.300" wide body, through-hole mounting, and JEDEC MS-001 compliant footprint. Thermal resistance θJA = 80°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (–In) | Inverting current input terminal | Accepts negative-polarity 4–20mA loop return; paired with Pin 3 (+In) for balanced differential sensing |
| 2 (CT) | Center-tap return node | Loop current return path; connects to field-side ground or transmitter common; critical for CMR integrity |
| 3 (+In) | Non-inverting current input terminal | Accepts positive-polarity 4–20mA loop feed; forms matched 75Ω differential pair with Pin 1 |
| 4 (V+) | Positive supply rail | Accepts +11.4V to +18V; decoupling with 1µF tantalum near pin required for stability |
| 5 (Ref Com) | Reference circuit ground | Separate ground for 10V reference section; must be tied to system ground or isolated as needed |
| 7 (Ref Noise Reduction) | Reference noise filter node | Connects external capacitor (e.g., 0.1µF) to ground to reduce high-frequency reference noise by ~80% |
| 8 (Ref Trim) | Reference output adjustment | Allows ±4% external trim of 10V reference; used for system-level offset nulling and drift compensation |
| 10 (Ref fB) | Reference feedback node | Internal connection point for reference amplifier feedback; not user-accessible in standard configuration |
| 11 (Ref Out) | 10V reference output | Provides regulated +10V at ±2mA drive capability; used for level-shifting, external circuit biasing, or ADC reference |
| 12 (Ref In) | Reference input for level shift | Accepts external voltage (or Ref Out) to shift RCV420KP output zero point; 8:1 attenuation to output |
| 13 (Rcv Com) | Receiver output common | Direct zero-adjust node; voltage applied here appears 1:1 at output - preferred for large offset corrections |
| 14 (Rcv Out) | Main 0–5V output | Final converted voltage (0V at 4mA, 5V at 20mA); low-impedance buffered output drives 10kΩ+ loads |
| 15 (Rcv fB) | Receiver feedback node | Internal summing junction for –1.25V offset generation; not externally accessible in basic operation |
| 16 (V–) | Negative supply rail | Accepts –11.4V to –18V; same decoupling requirement as V+ |
Key Features
| Feature | Design Value |
|---|---|
| Monolithic 4–20mA to 0–5V conversion | Eliminates discrete op-amp + resistor + reference designs; reduces BOM count, layout area, and calibration labor |
| Laser-trimmed 75Ω sense resistors | 0.01% matching ensures >86dB CMR without external resistor selection or matching effort |
| Integrated 10V precision reference | 5ppm/°C drift and 5µVp-p (0.1–10Hz) noise enable stable level-shifting and accurate offset nulling |
| Built-in level-shifting capability | Supports both Ref In (8:1 attenuation) and Rcv Com (1:1) methods - simplifies zero-point adjustment in multi-channel I/O |
| ±40V continuous common-mode input | Withstands ground potential differences in distributed control systems without external protection or isolation |
Applications
| RTU Analog Input Module | SCADA Field I/O Unit |
|---|---|
|
Use Scenario: Converting 4–20mA signals from remote pressure, flow, and temperature transmitters into digitizable 0–5V levels inside rack-mounted RTUs. IC Role / Device Role / Timing Role: Primary current-to-voltage converter; performs signal conditioning, common-mode noise rejection, and reference-stabilized scaling before ADC sampling. Use Value: Enables direct interfacing with 12-bit+ SAR ADCs while maintaining 0.1% end-to-end accuracy across 0–70°C ambient range. |
Use Scenario: Signal acquisition in outdoor SCADA cabinets exposed to EMI from nearby substations and motor drives. IC Role / Device Role / Timing Role: Front-end receiver providing 86dB CMR and ±40V common-mode tolerance to reject induced 50/60Hz noise on long twisted-pair cables. Use Value: Reduces need for external isolation or filtering components - cuts board space by 35% and improves long-term drift stability. |
| ESD Safety System Interface | Factory Automation Machine Monitoring |
|
Use Scenario: Interfacing intrinsically safe (IS) 4–20mA loops from hazardous-area sensors to programmable logic controllers in petrochemical plants. IC Role / Device Role / Timing Role: Loop-powered receiver with only 1.5V voltage drop at 20mA - preserves compliance voltage margin for IS barriers and Zener diode safety circuits. Use Value: Ensures reliable operation under low-loop-voltage conditions (<12V) while meeting IEC 61000-4-5 surge immunity requirements. |
Use Scenario: Real-time monitoring of hydraulic pressure, servo position, and coolant flow in CNC machine tool control panels. IC Role / Device Role / Timing Role: High-fidelity analog front-end delivering 30kHz full-power bandwidth and 10µs settling time for dynamic process variables. Use Value: Supports closed-loop control update rates up to 10kHz without signal distortion or phase lag artifacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4–20mA receiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| XTR115IRUGT | Two-wire loop transmitter (not receiver); requires external op-amp for receive function; no integrated 10V reference | Designed for sensor-side current sourcing, not field-side current sinking; unsuitable as drop-in RCV420KP replacement | Select only if redesigning from receiver to transmitter topology; not a functional substitute for RCV420KP |
| ISO122JP | Isolated analog output amplifier; provides galvanic isolation but no native 4–20mA input stage; requires external sense resistor | Used where ground-loop elimination is mandatory (e.g., medical or high-voltage test equipment); adds 3kV isolation barrier | Choose when isolation is required; otherwise, RCV420KP offers lower cost, higher accuracy, and simpler layout |
Compared with XTR115IRUGT and ISO122JP, the RCV420KP uniquely combines monolithic 4–20mA reception, precision 10V reference, and ±40V common-mode tolerance in a single 16-pin DIP - eliminating external components needed by alternatives and preserving design simplicity for non-isolated industrial I/O.
Availability
RCV420KP is available at Aetrix Electronics and suitable for RTU analog input modules, SCADA field I/O units, and ESD safety system interfaces requiring stable component supply, long-lifecycle support, and guaranteed traceability for industrial OEM programs.
Supply support for RCV420KP includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments (TI) is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with deep heritage in precision signal conditioning dating to Burr-Brown's 1980s innovations.
The RCV420KP belongs to TI's legacy precision analog receiver product line, engineered specifically for industrial process control signal integrity - emphasizing low-drift references, high CMR, and robustness in electrically hostile factory environments.
FAQ
What is the operating temperature range for the RCV420KP?
The RCV420KP is specified for 0°C to +70°C operation, with extended functionality from –25°C to +85°C. Its 10V reference exhibits only 5ppm/°C drift, and CMR remains ≥76dB across the full specification range - making it suitable for indoor industrial control cabinets without forced cooling.
Does the RCV420KP require external gain or offset adjustments?
No - the RCV420KP is fully self-contained with factory-laser-trimmed resistors and a precision 10V reference. Gain is fixed at 0.3125 V/mA (5V span over 16mA), and offset is internally set to –1.25V. External trim is optional only for fine-tuning: Ref Trim adjusts reference voltage, and Rcv Com enables direct zero-point correction.
How does the RCV420KP handle common-mode noise in industrial settings?
The RCV420KP achieves 86dB typical CMR via matched internal 75Ω sense resistors and differential amplifier topology. Its ±40V common-mode input range accommodates ground potential differences across long cable runs, and CMR stays ≥80dB at 60Hz - effectively rejecting noise from VFDs, contactors, and AC mains coupling.
Can the RCV420KP be used with a 3.3V microcontroller ADC?
Yes - the RCV420KP's 0–5V output can interface with 3.3V ADCs using a simple resistive divider (e.g., 10kΩ + 20kΩ) or an external op-amp buffer. Its low-output impedance (<0.01Ω) ensures minimal loading error, and its 10µs settling time supports sampling rates up to 100ksps without droop or overshoot.
What is the maximum allowable loop supply voltage when using the RCV420KP?
The RCV420KP introduces only 1.5V drop at full-scale 20mA, so it operates reliably with loop supplies as low as 12V. Absolute maximum supply is ±22V, but recommended operating range is ±11.4V to ±18V. This headroom supports use with intrinsic safety barriers and legacy 24VDC loop systems.
RCV420KP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1.5V/µs
- Gain Bandwidth Product:
- 150 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- -
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 3mA
- Current - Output / Channel:
- 10 mA
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
RCV420KP FAQ
1.How can I place an order for RCV420KP through Aetrix?
Please submit a Request for Quotation (RFQ) for RCV420KP on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for RCV420KP reliable?
The price and inventory of RCV420KP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RCV420KP is usually 5 days.
3.What payment methods are accepted for RCV420KP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RCV420KP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RCV420KP?
RCV420KP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RCV420KP order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for RCV420KP?
For technical support, including RCV420KP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RCV420KP requirements.
6.How does Aetrix verify that RCV420KP is sourced from the original manufacturer or authorized distributors?
All RCV420KP products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that RCV420KP meets industry standards.
7.What is the process for return or replacement of RCV420KP?
All RCV420KP units undergo pre-shipment inspection (PSI). If there is an issue with RCV420KP, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The RCV420KP part is unused and in its original packaging.
Return procedure for RCV420KP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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