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Texas Instruments RCV420KPG4
- Part No.:
- RCV420KPG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
RCV420KPG4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,728
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Product details
Overview
RCV420KPG4 from Texas Instruments (formerly Burr-Brown) is a monolithic precision 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 for use in factory automation signal conditioning circuits.
For engineers reviewing the RCV420KPG4 datasheet, RCV420KPG4 pinout, RCV420KPG4 application, or RCV420KPG4 equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, and two confirmed alternative parts - all grounded in the official SBVS019 datasheet and TI packaging documentation.
Technical Context
The RCV420KPG4 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 through Ref Trim or external circuitry.
It operates from ±15V supplies with only 1.5V drop at full scale, enabling use in intrinsically safe loops and systems with limited transmitter compliance voltage. The device maintains 86dB CMR across DC–10kHz and requires no gain/offset adjustments for standard 4–20mA-to-0–5V conversion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Range | 4–20mA loop current - directly interfaces with standard industrial transmitters without external shunt. |
| Output Range | 0–5V - compatible with ADC inputs, PLC analog modules, and microcontroller voltage-sensing circuits. |
| Conversion Accuracy | 0.1% of span - ensures ≤5mV error over full 0–5V output, critical for process control fidelity. |
| Common-Mode Range | ±40V - rejects ground-loop noise and enables operation in electrically noisy plant environments. |
| CMR | 86dB (DC), 80dB @ 60Hz - suppresses interference from motor drives, VFDs, and AC power lines. |
| Reference Voltage | 10.00V ±10mV (TYP) - stable reference for level-shifting and offset trimming with 5ppm/°C drift. |
| Supply Voltage | ±15V (rated), ±11.4V to ±18V (operating) - accommodates aging or unregulated industrial rails. |
| Quiescent Current | 3–4mA per supply - low power draw suitable for multi-channel isolated I/O modules. |
Pinout & Package
RCV420KPG4 is housed in a 16-pin plastic DIP (PDIP-N) package with 0°C to +70°C operating temperature range and JEDEC-standard 0.3" wide body. Pin functions are validated per SBVS019 Figure 1 and Pin Configuration diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (–In) | Inverting current input | Accepts 4–20mA signal return path; used with +In for differential sensing across matched 75Ω resistors. |
| 2 (+In) | Non-inverting current input | Primary loop current entry point; paired with –In to enable true differential current-to-voltage conversion. |
| 3 (CT) | Center tap | Loop return connection point; grounds current path while preserving common-mode rejection capability. |
| 4 (V+) | Positive supply rail | Accepts +11.4V to +18V; decoupling with 1µF tantalum capacitor required near pin for stability. |
| 5 (Ref Com) | Reference ground | Return for internal 10V reference; must be tied to system ground or low-impedance node to maintain accuracy. |
| 7 (Ref Noise Reduction) | Noise filter terminal | Connects external capacitor (e.g., 0.1µF) to ground to reduce high-frequency reference noise by ~80%. |
| 8 (Ref Trim) | Reference adjustment | Allows ±4% trim of 10V reference output; used for system-level offset calibration or zero-error correction. |
| 10 (Ref fB) | Reference feedback | Internal node for reference amplifier feedback; not user-accessible but critical for reference stability. |
| 11 (Ref Out) | 10V reference output | Provides precision 10V source for external circuitry or level-shifting; capable of ±10mA sourcing/sinking. |
| 12 (Ref In) | Reference input for level shift | Accepts external voltage to shift RCV420 output; 8:1 attenuation means 1V here = 125mV at 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 output | 0–5V analog output; low-impedance buffered voltage proportional to loop current (0.3125 V/mA). |
| 15 (Rcv fB) | Receiver feedback | Internal amplifier feedback node; external connections degrade CMR and are not recommended. |
| 16 (V–) | Negative supply rail | Accepts –11.4V to –18V; requires local 1µF tantalum decoupling to prevent oscillation and noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 75Ω sense resistors | Laser-trimmed to 0.01% matching - eliminates discrete resistor mismatch errors and preserves 86dB CMR. |
| Self-contained 10V reference | 5ppm/°C drift and 5µVp-p (0.1–10Hz) noise - enables accurate level-shifting and system-wide calibration traceability. |
| Built-in level-shifting | Supports both Ref In (attenuated) and Rcv Com (direct) methods - allows flexible zero-offset adjustment without external op-amps. |
| No gain/offset adjustments needed | Factory-calibrated for 0.1% accuracy - removes manual potentiometer tuning, reducing production test time and field recalibration. |
| High noise immunity | 86dB CMR + 1.5V max loop drop - sustains reliable operation in ESD-prone, motor-driven, or RF-heavy industrial settings. |
| Robust absolute ratings | ±40V continuous common-mode, 250mA momentary input - withstands surge events and wiring faults in harsh environments. |
Applications
| Process Control Transmitter Interface | PLC Analog Input Module |
|---|---|
|
Use Scenario: Converting 4–20mA signals from pressure, temperature, or flow transmitters into 0–5V for digitization in centralized control rooms. IC Role / Device Role / Timing Role: Precision current-to-voltage converter with integrated reference and common-mode rejection - serves as front-end signal conditioner before ADC sampling. Use Value: Eliminates need for external precision shunts and op-amps, reducing BOM count and improving long-term drift stability under thermal cycling. |
Use Scenario: Adding scalable analog input channels to modular PLC backplanes where space and thermal management are constrained. IC Role / Device Role / Timing Role: Monolithic loop receiver providing galvanically isolated-compatible output - interfaces directly with multiplexed SAR ADCs. Use Value: 1.5V loop drop enables compatibility with low-compliance smart transmitters; ±40V CMR prevents false readings during motor startup surges. |
| SCADA Remote Terminal Unit (RTU) | Machinery Health Monitoring System |
|
Use Scenario: Receiving analog sensor data over long cable runs in oil & gas pipeline monitoring stations exposed to lightning-induced ground potentials. IC Role / Device Role / Timing Role: High-CMR current receiver protecting against common-mode transients - placed after signal isolators or before AFE stages. Use Value: 86dB CMR and ±40V rating suppress induced noise on miles-long twisted-pair cables, ensuring <0.1% measurement uncertainty. |
Use Scenario: Digitizing vibration, current, or temperature signals from rotating equipment in predictive maintenance gateways. IC Role / Device Role / Timing Role: Signal conditioning element converting legacy 4–20mA sensor outputs into clean 0–5V for edge AI inference processors. Use Value: Internal 10V reference enables synchronized multi-channel offset calibration; low quiescent current supports battery-backed operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-loop receiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| XTR116IRUGT | Two-wire 4–20mA transmitter (not receiver); requires external op-amp and reference for receive function. | Designed for loop-powered sensor transmitters, not passive receiver roles - cannot replace RCV420KPG4 without redesign. | Select only if building custom transmitter nodes; not a functional substitute for RCV420KPG4's receive functionality. |
| ISO124U | Isolated analog amplifier with 2500VRMS isolation; no integrated sense resistors or 10V reference - needs external components for 4–20mA conversion. | Suitable for galvanically isolated receiver designs where safety separation is mandatory, but adds complexity and cost. | Choose when reinforced isolation is required; otherwise, RCV420KPG4 offers lower component count and higher integration. |
Compared with XTR116IRUGT and ISO124U, the RCV420KPG4 delivers fully self-contained 4–20mA-to-0–5V conversion without external resistors, references, or isolation barriers - reducing PCB area by >40% and eliminating 7+ passive components per channel.
Availability
RCV420KPG4 is available at Aetrix Electronics and suitable for process control, factory automation, and SCADA systems requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for RCV420KPG4 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 and embedded processing technologies, with decades of heritage in precision signal conditioning and industrial interface solutions.
The RCV420KPG4 belongs to TI's legacy Burr-Brown precision analog portfolio, designed specifically for high-reliability industrial current-loop interfacing - emphasizing accuracy, noise immunity, and ease of integration in harsh environments.
FAQ
What is the maximum common-mode voltage the RCV420KPG4 can handle?
The RCV420KPG4 supports a continuous common-mode input voltage range of ±40V, as specified in the Absolute Maximum Ratings table and confirmed in Typical Performance Curves. This rating allows it to reject ground potential differences in long cable runs and survive transient surges typical in factory floors. Exceeding ±40V may cause permanent damage, and operation above this limit is not supported in any configuration of the RCV420KPG4.
Does the RCV420KPG4 require external components for basic 4–20mA to 0–5V conversion?
No, the RCV420KPG4 requires no external gain or offset adjustments for standard 4–20mA-to-0–5V conversion. Its internal laser-trimmed 75Ω sense resistors, precision amplifier, and 10V reference provide complete functionality. Only supply decoupling capacitors (1µF tantalum on V+ and V–) are mandatory; all other features - including level-shifting and noise reduction - are optional enhancements to the base RCV420KPG4 operation.
Can the RCV420KPG4 be used with a 3.3V microcontroller ADC?
Yes, the RCV420KPG4's 0–5V output is compatible with 3.3V microcontrollers when used with appropriate scaling - either via external resistor divider or by configuring the MCU's ADC reference to 5V. The RCV420KPG4 itself does not support reduced output ranges; its 0–5V span is fixed and optimized for industrial-grade 12-bit and 16-bit ADCs. No internal modification of the RCV420KPG4 is needed to interface with 3.3V logic.
What is the purpose of the Ref Noise Reduction pin on the RCV420KPG4?
The Ref Noise Reduction pin (Pin 7) on the RCV420KPG4 accepts an external capacitor (e.g., 0.1µF) to ground, reducing high-frequency noise on the internal 10V reference. Per SBVS019, this cuts reference output noise from ~1mVp-p to ~200µVp-p, and further attenuates it to ~25µVp-p at the RCV420KPG4 output due to the 8:1 Ref In attenuation. This improves system SNR in noise-sensitive measurement applications without altering the RCV420KPG4's core functionality.
How does the RCV420KPG4 differ from the RCV420JP grade?
The RCV420KPG4 and RCV420JP share identical circuitry and pinout but differ in initial accuracy specifications: RCV420KPG4 has 0.15% max gain error and 0.075% max zero error, while RCV420JP allows up to 0.25% gain error and 0.15% zero error. Both operate from 0°C to +70°C and use the same PDIP-16 package. The "KP" suffix denotes tighter initial calibration - making RCV420KPG4 preferred for high-fidelity process control where minimal factory calibration is desired.
RCV420KPG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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
RCV420KPG4 FAQ
1.How can I place an order for RCV420KPG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for RCV420KPG4 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 RCV420KPG4 reliable?
The price and inventory of RCV420KPG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RCV420KPG4 is usually 5 days.
3.What payment methods are accepted for RCV420KPG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RCV420KPG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RCV420KPG4?
RCV420KPG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RCV420KPG4 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 RCV420KPG4?
For technical support, including RCV420KPG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RCV420KPG4 requirements.
6.How does Aetrix verify that RCV420KPG4 is sourced from the original manufacturer or authorized distributors?
All RCV420KPG4 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 RCV420KPG4 meets industry standards.
7.What is the process for return or replacement of RCV420KPG4?
All RCV420KPG4 units undergo pre-shipment inspection (PSI). If there is an issue with RCV420KPG4, 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 RCV420KPG4 part is unused and in its original packaging.
Return procedure for RCV420KPG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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