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Analog Devices Inc./Maxim Integrated REF02HP+
- Part No.:
- REF02HP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
REF02HP+.pdf
- Description:
- IC VREF SERIES 0.5% 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,932
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Product details
Overview
REF02HP+ from Maxim Integrated is a precision 5V voltage reference IC with TEMP pin for linear temperature sensing, housed in an 8-pin plastic DIP package. It delivers ±25mV initial accuracy, 25ppm/°C max temperature coefficient over 0°C to +70°C, 10µVP-P (0.1Hz–10Hz) output noise, and supports 10mA load current with 1mA quiescent supply current. It is used in high-accuracy ADC/DAC reference circuits requiring stable 5V bias and integrated temperature monitoring.
For engineers reviewing the REF02HP+ datasheet, REF02HP+ pinout, REF02HP+ application, or REF02HP+ equivalent, this page provides verified electrical specifications, thermal transducer interface details, trim-adjustable output behavior, and validated alternative options for precision analog reference design.
Technical Context
The REF02HP+ implements a bandgap-based reference core with internal trimming and a dedicated TEMP pin that outputs a voltage proportional to absolute temperature (630mV at 25°C, 2.1mV/°C slope). Its output is adjustable ±6% via external 10kΩ potentiometer without degrading temperature stability beyond 0.7ppm/°C per 100mV of adjustment.
It operates from a single 7V–33V supply, features short-circuit protection, indefinite short-circuit duration capability, and maintains ±0.07% max output voltage change over its full operating temperature range. Load regulation is specified at 0.006%/mA (0–8mA), and line regulation at 0.007%/V (8–33V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.975V to 5.025V at 25°C - ensures ≤±0.5% deviation from nominal 5V under no-load conditions. |
| Initial Accuracy | ±25mV (±0.5%) - defines maximum output error before system calibration or trimming. |
| Tempco (Max) | 25ppm/°C - limits worst-case drift to ±1.75mV over 0°C to +70°C operating range. |
| Output Noise | 10µVP-P (0.1Hz–10Hz) - enables high-resolution 16-bit+ data conversion without added noise floor. |
| TEMP Pin Output | 630mV at 25°C, 2.1mV/°C slope - provides direct Kelvin-scaled analog temperature signal with ±0.5°C resolution potential. |
| Supply Range | 7V to 33V - allows operation from common industrial rails (e.g., +12V, +15V, +24V) with ≥2V headroom. |
| Quiescent Current | 1.0–1.4mA - enables low-power reference use in battery-backed or energy-constrained systems. |
Pinout & Package
REF02HP+ uses an 8-pin plastic DIP (dual in-line package) with 0.3-inch body width and standard through-hole mounting. Pin 1 is VOUT, Pin 2 is TRIM, Pin 3 is TEMP (active only on REF02 variants), Pin 4 is GND, Pin 5 is VOUT (redundant output), Pin 6 is TRIM (redundant trim), Pin 7 is N.C., Pin 8 is VIN.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5 | VOUT | Dual-output pins reduce trace inductance and improve PSRR; both deliver identical 5V reference voltage. |
| 2, 6 | TRIM | Adjusts output ±6% (±300mV) using external 10kΩ pot; minimal impact on tempco (0.7ppm/°C per 100mV). |
| 3 | TEMP | Linear temperature transducer output: 630mV @ 25°C, 2.1mV/°C slope; requires ≤50nA load and ≤30pF capacitance. |
| 4 | GND | Analog ground reference; must be star-connected to minimize noise coupling into reference path. |
| 7 | N.C. | No internal connection; must remain unconnected to avoid parasitic leakage or ESD paths. |
| 8 | VIN | Input supply pin; accepts 7–33V DC; internal circuitry regulates down to 5V with 1mA quiescent draw. |
Key Features
| Feature | Design Value |
|---|---|
| Pretrimmed 5V output | Guaranteed 4.975–5.025V at 25°C eliminates need for factory calibration in most applications. |
| Integrated temperature sensor | TEMP pin provides calibrated 2.1mV/°C analog output-no external sensor or signal conditioning required. |
| Low 10µVP-P noise | Enables stable reference for 16-bit SAR and delta-sigma ADCs without post-filtering or averaging overhead. |
| ±6% output adjustability | Allows fine-tuning to compensate for system-level gain/offset errors while preserving thermal stability. |
| Short-circuit protected | Withstands indefinite output short to GND or VIN-critical for robustness in test equipment and field-deployed systems. |
Applications
| High-Accuracy Data Acquisition | Precision Temperature Monitoring |
|---|---|
Use Scenario: 16-bit industrial ADC measuring strain gauge or RTD signals in PLC analog input modules. IC Role / Device Role / Timing Role: Primary 5V reference source for ADC VREF input and TEMP pin used for cold-junction compensation. Use Value: Enables <0.01% total measurement uncertainty by combining low-noise reference with on-chip temperature tracking. | Use Scenario: Remote environmental sensor node logging ambient temperature across -20°C to +70°C range. IC Role / Device Role / Timing Role: Dual-function device: 5V reference powers local signal chain; TEMP pin feeds microcontroller ADC as calibrated temperature sensor. Use Value: Eliminates separate temperature IC and reference IC-reduces BOM count, PCB area, and calibration complexity. |
| Calibrated Test Equipment | Programmable Power Supply Reference |
Use Scenario: Benchtop digital multimeter requiring traceable 5V reference with <50ppm/year stability. IC Role / Device Role / Timing Role: Master reference for internal DAC-based voltage generation and self-calibration routines. Use Value: ±25mV initial error and 25ppm/°C tempco meet Class II DMM requirements without active oven control. | Use Scenario: Lab-grade programmable DC power supply needing precise, adjustable 5V feedback reference. IC Role / Device Role / Timing Role: Adjustable 5V reference (via TRIM pin) sets output voltage setpoint; TEMP pin monitors heatsink temperature for thermal foldback. Use Value: Single IC satisfies both precision voltage setting and thermal safety monitoring-reducing component count and interconnect failure points. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF02HSA+ | Same electrical specs but in 8-pin SOIC (S8-2) package; lower thermal resistance, surface-mount compatible. | Preferred for space-constrained or automated assembly designs where through-hole DIP is impractical. | Select REF02HSA+ when PCB real estate or reflow compatibility is prioritized over manual prototyping or socket-based testing. |
| MAX6143AESA+ | 5V precision reference with 3ppm/°C max tempco (vs. 25ppm/°C), no TEMP pin, SOIC-8 package, 1.8–18V supply. | Better stability for metrology-grade applications; lacks integrated temperature sensing function. | Select MAX6143AESA+ when ultimate temperature stability is required and external temperature sensing is acceptable or already implemented. |
Compared with REF02HP+, REF02HSA+ offers identical performance in a surface-mount package for production scalability, while MAX6143AESA+ trades away the TEMP pin for significantly lower tempco-making it suitable for ultra-stable references where thermal sensing is handled separately.
Availability
REF02HP+ is available at Aetrix Electronics and suitable for high-accuracy data acquisition systems, calibrated test equipment, and programmable power supplies requiring stable component supply, long-term calibration traceability, and industrial temperature range support.
Supply support for REF02HP+ 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) designs precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The REF02HP+ belongs to Maxim's legacy precision voltage reference product line, engineered specifically for applications demanding stable 5V references with integrated temperature transduction and field-adjustable output.
FAQ
What is the operating temperature range of the REF02HP+?
The REF02HP+ is rated for operation from 0°C to +70°C. This industrial-grade temperature range ensures reliable performance in commercial and non-extended-environment applications such as benchtop instruments, PLC I/O modules, and laboratory power supplies. The device's 25ppm/°C maximum temperature coefficient is guaranteed across this full range, and its TEMP pin output remains linear and calibrated within these limits. REF02HP+ does not support extended temperature grades like -40°C to +85°C-that capability is reserved for REF02CESA+ variants.
Can the REF02HP+ output voltage be adjusted, and how does trimming affect accuracy?
Yes, the REF02HP+ output voltage can be adjusted ±6% (±300mV around 5V) using an external 10kΩ potentiometer connected between TRIM (pins 2/6), VOUT (pins 1/5), and GND (pin 4). Trimming introduces minimal degradation to temperature stability: the output voltage temperature coefficient increases by only 0.7ppm/°C per 100mV of adjustment. For example, adjusting +200mV adds ≤1.4ppm/°C to the base 25ppm/°C spec-still well within typical system requirements. The REF02HP+ maintains its ±25mV initial accuracy specification before trimming.
What is the function and electrical specification of the TEMP pin on the REF02HP+?
The TEMP pin (pin 3) on the REF02HP+ provides a linear analog voltage proportional to absolute temperature: 630mV at 25°C with a slope of 2.1mV/°C. This corresponds to VO = 2.1 × (T + 273) mV, where T is in °C. To maintain accuracy, the pin must be loaded with ≤50nA and shunted by ≤30pF capacitance. It is not present on REF01 variants and is exclusive to REF02-family devices. The TEMP pin enables direct Kelvin-scaled temperature measurement without external components-ideal for cold-junction compensation, thermal derating, or ambient monitoring in REF02HP+ based systems.
How does the REF02HP+ compare to the REF01HP+ in terms of output voltage and application suitability?
The REF02HP+ delivers a stable 5V output, whereas the REF01HP+ provides 10V. Both share identical package (8-pin plastic DIP), temperature range (0°C to +70°C), max tempco (25ppm/°C), and trim capability (±6%). However, only REF02HP+ includes the TEMP pin for temperature sensing. REF02HP+ operates from 7–33V supply (vs. 13–33V for REF01HP+), making it better suited for lower-voltage systems. Choose REF02HP+ for 5V-referenced ADCs, temperature-aware power supplies, or dual-function reference/sensor roles; choose REF01HP+ when 10V full-scale range or higher supply headroom is needed.
Is the REF02HP+ RoHS-compliant and lead-free?
Yes, the REF02HP+ is RoHS-compliant and lead-free, as indicated by the "+" suffix in its part number per Maxim's ordering nomenclature. This designation confirms compliance with EU Directive 2011/65/EU and associated exemptions, including lead content below 0.1% by weight in homogeneous materials. The device uses matte tin lead finish and meets JEDEC J-STD-020 moisture sensitivity level (MSL) requirements for standard SMT handling. REF02HP+ is suitable for modern environmentally regulated manufacturing without requiring special Pb-free reflow profiles beyond standard SnAgCu guidelines.
REF02HP+ 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:
- ±0.5%
- Temperature Coefficient:
- 25ppm/°C
- Noise - 0.1Hz to 10Hz:
- 10µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 8V ~ 33V
- Current - Supply:
- 1.4mA
- Current - Cathode:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
REF02HP+ FAQ
1.How can I place an order for REF02HP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for REF02HP+ 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 REF02HP+ reliable?
The price and inventory of REF02HP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF02HP+ is usually 5 days.
3.What payment methods are accepted for REF02HP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF02HP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF02HP+?
REF02HP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF02HP+ 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 REF02HP+?
For technical support, including REF02HP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF02HP+ requirements.
6.How does Aetrix verify that REF02HP+ is sourced from the original manufacturer or authorized distributors?
All REF02HP+ 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 REF02HP+ meets industry standards.
7.What is the process for return or replacement of REF02HP+?
All REF02HP+ units undergo pre-shipment inspection (PSI). If there is an issue with REF02HP+, 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 REF02HP+ part is unused and in its original packaging.
Return procedure for REF02HP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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