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Analog Devices Inc./Maxim Integrated REF02CP+
- Part No.:
- REF02CP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
REF02CP+.pdf
- Description:
- IC VREF SERIES 1% 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,193
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Product details
Overview
REF02CP+ from Maxim Integrated is a precision +5V voltage reference with TEMP pin output, designed for high-accuracy analog systems requiring stable excitation and temperature sensing. It delivers 5.000V ±15mV initial accuracy, 65ppm/°C max temperature coefficient over 0°C to +70°C, 10µVP-P (0.1Hz–10Hz) low noise, and operates from 7V to 30V input with 1.0–1.6mA quiescent current. Used in precision ADC/DAC calibration and remote temperature transducers.
For engineers reviewing the REF02CP+ datasheet, REF02CP+ pinout, REF02CP+ application, or REF02CP+ equivalent, key selection criteria include its integrated linear temperature transducer (630mV @ 25°C, 2.1mV/°C), ±6% output adjustability via external resistor, short-circuit protection, and plastic DIP-8 package compatibility with legacy industrial layouts.
Technical Context
The REF02CP+ integrates a bandgap-based +5V reference core with a dedicated TEMP pin that outputs a voltage linearly proportional to absolute temperature (2.1mV/°C), enabling direct use as a two-terminal temperature sensor without external components. Its trim terminal allows ±300mV adjustment of the 5V output while maintaining <0.7ppm/°C/100mV degradation in temperature coefficient.
It operates in single-supply mode from 7V to 30V, supports up to 8mA load current at full temperature range, and features internal short-circuit protection with indefinite fault duration. The device exhibits 0.009%/V line regulation and 0.006%/mA load regulation (IL = 0–4mA) over 0°C to +70°C, with turn-on settling time of 230µs to ±0.1%.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±15mV at TA = +25°C - ensures system-level calibration accuracy without post-manufacture trimming. |
| Tempco (Max) | 65ppm/°C over 0°C to +70°C - limits output drift to ±23mV across full operating range. |
| TEMP Pin Output | 630mV at +25°C, 2.1mV/°C slope - enables direct Kelvin-referenced temperature measurement with ±0.5°C resolution. |
| Output Noise | 12µVP-P (0.1Hz–10Hz) - minimizes quantization error in 16-bit+ data acquisition systems. |
| Input Voltage Range | 7V to 30V - supports operation from standard 9V batteries or regulated 12V/24V industrial rails. |
| Quiescent Current | 1.0–1.6mA - enables low-power portable instrumentation without sacrificing reference stability. |
| Adjustment Range | ±6% (±300mV) via external 10kΩ potentiometer - allows fine-tuning to compensate for system gain errors. |
Pinout & Package
REF02CP+ uses an 8-pin Plastic Dual-In-Line Package (P8-2), 0.3" wide, with 0.1" lead pitch. Pin 3 is the TEMP output; pins 1, 7, and 8 are no-connect on this variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connection (NC) | Not bonded; must remain unconnected per datasheet to avoid parasitic coupling. |
| 2 | GND | Analog ground reference; requires low-impedance connection to minimize noise injection. |
| 3 | TEMP | Linear temperature transducer output (630mV @ 25°C); limit current to ±50nA and capacitance to ≤30pF. |
| 4 | VIN | Positive supply input (7V–30V); bypass with ≥1µF ceramic capacitor near pin for stability. |
| 5 | TRIM | Adjustment terminal; connect 10kΩ pot between VO and GND for ±6% output tuning. |
| 6 | VO | +5V precision reference output; capable of sourcing up to 8mA with <0.01%/mA load regulation. |
| 7 | No Connection (NC) | Internally unused; leave floating or tie to GND only if required by PCB layout constraints. |
| 8 | No Connection (NC) | Not functional; avoid routing signals or traces adjacent to prevent crosstalk. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated temperature transducer | Provides calibrated 2.1mV/°C output on dedicated TEMP pin-eliminates need for external sensor and signal conditioning. |
| ±6% output adjustability | Enables system-level error correction (e.g., matching 5.000V to 5.024V for binary-scaled DACs) without degrading tempco beyond 0.7ppm/°C per 100mV. |
| Low 12µVP-P noise (0.1Hz–10Hz) | Reduces effective number of bits (ENOB) loss in high-resolution ADCs, critical for metrology-grade measurements. |
| Short-circuit protected output | Withstands indefinite grounding or VIN shorts-ensures reliability in rugged industrial environments with transient faults. |
| Single-supply 7V–30V operation | Simplifies power architecture in mixed-signal systems by eliminating negative rails or charge pumps for reference biasing. |
Applications
| Precision ADC Calibration | Remote Temperature Monitoring |
|---|---|
|
Use Scenario: High-accuracy 16-bit analog-to-digital conversion in portable multimeters and data loggers. IC Role / Device Role / Timing Role: Provides stable 5.000V reference voltage and excitation source for ADC front-end, while TEMP pin monitors ambient sensor temperature. Use Value: Enables <±0.01% full-scale accuracy and real-time thermal drift compensation using the same IC's dual outputs. |
Use Scenario: Distributed temperature sensing in HVAC control panels with long cable runs to remote probes. IC Role / Device Role / Timing Role: Serves as both precision voltage reference for signal conditioning circuitry and linear temperature transducer (630mV @ 25°C, 2.1mV/°C). Use Value: Eliminates separate temperature sensor IC and reference IC, reducing BOM count and improving channel-to-channel thermal tracking. |
| Calibrated Current Source | Industrial Threshold Detector |
|
Use Scenario: Programmable 1mA current source for RTD or strain gauge excitation in process control transmitters. IC Role / Device Role / Timing Role: Supplies precise 5V reference to op-amp feedback network; TRIM pin adjusts output to exact 1.000mA setpoint. Use Value: Achieves ±0.1% current accuracy over temperature without laser trimming or external calibration resistors. |
Use Scenario: Over-temperature shutdown circuit in motor drives and power supplies with hysteresis-free trip point. IC Role / Device Role / Timing Role: Generates stable 5V threshold reference for comparator inputs; TEMP pin provides real-time die temperature feedback. Use Value: Enables accurate thermal protection at defined junction temperatures (e.g., 85°C trip) using only one IC and minimal external parts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF02EP+ | Same 8-pin PDIP package and pinout; tighter 8.5ppm/°C max tempco and ±15mV initial error vs. REF02CP+'s 65ppm/°C and ±50mV. | Better suited for lab-grade instruments where long-term stability dominates cost and temperature range. | Select REF02EP+ when operating temperature is strictly 0°C to +70°C and higher initial accuracy is required. |
| MAX6143AESA+ | 5.0V precision reference in 8-pin SO; 3ppm/°C max tempco, 0.02% initial accuracy, but no TEMP pin output. | Lacks integrated temperature sensing-requires separate sensor for thermal monitoring functions. | Choose MAX6143AESA+ when ultra-low drift is mandatory and temperature transduction is handled externally. |
Compared with REF02CP+, REF02EP+ offers superior temperature stability at identical package and interface, while MAX6143AESA+ delivers significantly lower drift but removes the dual-function TEMP capability-making REF02CP+ uniquely balanced for cost-sensitive industrial designs needing both reference and sensing.
Availability
REF02CP+ is available at Aetrix Electronics and suitable for precision data acquisition, industrial temperature monitoring, and calibrated current source applications requiring stable component supply across extended production lifecycles.
Supply support for REF02CP+ 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
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.
The REF02 product line delivers industry-standard +5V precision references with integrated temperature transduction, targeting applications where space-constrained, dual-function analog building blocks improve system integration and reduce calibration complexity.
FAQ
What is the maximum allowable capacitance on the TEMP pin of the REF02CP+?
The REF02CP+ datasheet specifies a maximum capacitance of 30pF on the TEMP pin to ensure stable operation and accurate temperature readings. Exceeding this value may cause phase shift or oscillation in the temperature transducer output, leading to erroneous thermal measurements. Always use short, shielded traces and avoid placing decoupling capacitors directly on pin 3. This constraint applies specifically to the REF02CP+ and is documented in Note 7 of the electrical characteristics table.
Can the REF02CP+ operate from a 5V supply rail?
No, the REF02CP+ requires a minimum input voltage of 7V for proper regulation and specified performance. At 5V, the internal reference core cannot maintain 5.000V output, resulting in dropout and uncontrolled behavior. The absolute minimum input is 7V, with recommended operation from 9V to 30V. This requirement is explicitly stated in the "Typical Operating Circuit" and "Absolute Maximum Ratings" sections for REF02C variants like the REF02CP+.
How does the TRIM pin affect temperature coefficient in the REF02CP+?
Adjusting the REF02CP+ output via the TRIM pin changes the temperature coefficient by approximately 0.7ppm/°C per 100mV of output deviation from 5.000V. For example, setting VO to 5.300V increases the worst-case tempco from 65ppm/°C to ~67.1ppm/°C. This relationship is confirmed in the "Change in VO Temperature Coefficient with Output Adjustment" specification and applies identically across all REF02C-grade devices including the REF02CP+.
Is the REF02CP+ pin-compatible with the REF01CP+?
No, the REF02CP+ and REF01CP+ are not pin-compatible. While both use 8-pin PDIP packages, the REF01CP+ has no TEMP pin functionality-pin 3 is a no-connect-whereas the REF02CP+ uses pin 3 as the active TEMP output. Swapping them would result in missing temperature data or incorrect biasing. Their TRIM and VO pin assignments differ in internal routing, making direct replacement unsafe without board revision.
What is the short-circuit current rating for the REF02CP+ output?
The REF02CP+ output is rated for indefinite short-circuit current of 30mA when VO is shorted to GND or VIN. This protection is built into the output stage and does not require external current limiting. The value is guaranteed across the full 0°C to +70°C operating range and is verified in production testing per the "Short-Circuit Current" parameter in the REF02C electrical characteristics table. This rating applies specifically to the REF02CP+ and matches other REF02C variants.
REF02CP+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Series:
- REF02
- Packaging:
- Tube
- Product Status:
- Obsolete
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 21 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 65ppm/°C
- Noise - 0.1Hz to 10Hz:
- 12µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 8V ~ 30V
- Current - Supply:
- 1.6mA
- Current - Cathode:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
REF02CP+ FAQ
1.How can I place an order for REF02CP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for REF02CP+ 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 REF02CP+ reliable?
The price and inventory of REF02CP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF02CP+ is usually 5 days.
3.What payment methods are accepted for REF02CP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF02CP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF02CP+?
REF02CP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF02CP+ 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 REF02CP+?
For technical support, including REF02CP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF02CP+ requirements.
6.How does Aetrix verify that REF02CP+ is sourced from the original manufacturer or authorized distributors?
All REF02CP+ 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 REF02CP+ meets industry standards.
7.What is the process for return or replacement of REF02CP+?
All REF02CP+ units undergo pre-shipment inspection (PSI). If there is an issue with REF02CP+, 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 REF02CP+ part is unused and in its original packaging.
Return procedure for REF02CP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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