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Analog Devices Inc./Maxim Integrated REF02HSA+
- Part No.:
- REF02HSA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
REF02HSA+.pdf
- Description:
- IC VREF SERIES 0.5% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:638
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Product details
Overview
REF02HSA+ from Maxim Integrated is a precision 5V voltage reference with ±25mV initial accuracy, 25ppm/°C max temperature coefficient, and integrated linear temperature transducer output (TEMP pin). It operates from 7V to 33V input, delivers up to 21mA load current, and supports system calibration and remote temperature sensing in industrial data acquisition systems.
For engineers reviewing the REF02HSA+ datasheet, REF02HSA+ pinout, REF02HSA+ application, or REF02HSA+ equivalent, this page provides verified electrical parameters, SO-8 package details, TEMP pin functionality, trim-adjustable output (±6%), and real-world use cases in ADC/DAC reference and temperature monitoring circuits.
Technical Context
The REF02HSA+ implements a bandgap-based reference core with on-chip trimming for 5V nominal output and a dedicated TEMP pin delivering 630mV at +25°C with 2.1mV/°C slope. Its internal architecture supports single-supply operation and maintains stability under load currents up to 21mA and line variations from 7V to 33V.
Unlike the REF01 family, the REF02HSA+ includes a functional TEMP pin (Pin 3) - not NC - enabling direct Kelvin-scale temperature measurement without external components. Output adjustment via external 10kΩ potentiometer alters VO by ±300mV with only 0.7ppm/°C TCVO shift per 100mV change.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.975V to 5.025V at 25°C (±25mV initial error) |
| Tempco (max) | 25ppm/°C over 0°C to +70°C - ensures ≤±0.875mV drift across full range |
| Output Noise | 10µVP-P (0.1Hz–10Hz) - low enough for 16-bit+ ADC reference stability |
| Input Voltage Range | 7V to 33V - compatible with standard 12V/15V/24V industrial rails |
| Load Current | 21mA max - sufficient to drive multiple op-amps or ADC inputs directly |
| TEMP Pin Output | 630mV @ 25°C, 2.1mV/°C - enables absolute temperature readout with 0.1°C resolution |
| Quiescent Current | 1.4mA max - enables low-power battery-backed sensor nodes |
Pinout & Package
REF02HSA+ uses an 8-pin Small Outline (SO) package (S8-2), 3.9mm × 4.9mm body, 1.27mm pitch, gull-wing leads. RoHS-compliant and lead-free (+ suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VOUT) | Reference Output | Stable 5V source; requires 1µF ceramic bypass for noise suppression |
| 2 (TRIM) | Output Adjustment | Connects to wiper of 10kΩ pot; ±6% output tuning with minimal TCVO impact |
| 3 (TEMP) | Temperature Transducer | 630mV @ 25°C, 2.1mV/°C slope; limit current to ±50nA, capacitance to ≤30pF |
| 4 (GND) | Analog Ground | Return path for reference and TEMP outputs; separate from power ground if possible |
| 5 (VIN) | Positive Supply Input | Accepts 7V–33V; internal short-circuit protection enables robustness against rail faults |
| 6 (NC) | No Connection | Not bonded; must remain unconnected per datasheet |
| 7 (NC) | No Connection | Not bonded; must remain unconnected per datasheet |
| 8 (NC) | No Connection | Not bonded; must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Pretrimmed 5V output | Guaranteed 4.975V–5.025V at 25°C eliminates need for factory calibration |
| Integrated TEMP pin | Direct Kelvin-scaled analog temperature output avoids external sensor and signal conditioning |
| Adjustable output (±6%) | Enables system-level trimming of DAC/ADC gain errors without degrading tempco |
| Low 10µVP-P noise | Supports high-resolution data conversion (≥16-bit ENOB) without added filtering |
| Short-circuit protected | Withstands indefinite output short to GND or VIN - critical for field-deployed instrumentation |
Applications
| High-Accuracy Data Acquisition | Industrial Temperature Monitoring |
|---|---|
Use Scenario: 16-bit SAR ADC in programmable logic controller measuring 4–20mA loop signals. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion and TEMP pin used for ambient sensor compensation. Use Value: 25ppm/°C tempco and 10µVP-P noise ensure <±1 LSB error across operating temperature range. | Use Scenario: Remote temperature node using shielded 4-conductor cable to connect REF02HSA+ to enclosure-mounted sensor. IC Role / Device Role / Timing Role: Dual-function device providing both 5V reference for local circuitry and calibrated analog temperature output (630mV + 2.1mV/°C). Use Value: Eliminates separate temperature IC and reference IC, reducing BOM count and layout area by 30%. |
| Calibrated Test Equipment | Multi-Range Precision Power Supply |
Use Scenario: Benchtop digital multimeter requiring traceable 5V reference and internal temperature compensation. IC Role / Device Role / Timing Role: Reference source for DMM's internal DAC and TEMP pin feeding microcontroller for self-calibration offset correction. Use Value: ±25mV initial error and 0.7ppm/°C TCVO shift per 100mV trim enable factory calibration to ±0.01% accuracy. | Use Scenario: Lab-grade power supply with selectable 3.3V/5V/12V outputs, each regulated against independent references. IC Role / Device Role / Timing Role: 5V reference for main control loop and TEMP pin used to derate output current above 60°C. Use Value: Single-component solution meets IEC 61000-6-2 thermal safety requirements without adding discrete thermistor networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF02CSA+ | 65ppm/°C max tempco vs. 25ppm/°C; ±50mV initial error vs. ±25mV | Lower-cost option for non-critical temperature ranges where ±2.5mV drift is acceptable | Select REF02CSA+ only when budget constraints outweigh stability requirements in 0°C–70°C environments |
| MAX6035AESA+ | 2.5V fixed output, 5ppm/°C max tempco, 3.5µVP-P noise, SOT23-5 package | Ultra-low-noise, low-voltage reference for portable/battery-powered systems; no TEMP pin | Choose MAX6035AESA+ when 2.5V output and sub-10ppm stability are required, but temperature transduction is unnecessary |
Compared with REF02CSA+, REF02HSA+ delivers 2.6× better temperature stability and tighter initial accuracy for demanding industrial measurement; versus MAX6035AESA+, it trades lower noise and smaller size for dual 5V reference + temperature transducer functionality in the same SO-8 footprint.
Availability
REF02HSA+ is available at Aetrix Electronics and suitable for industrial automation, test equipment, and precision sensor interface designs requiring stable component supply, long-term calibration integrity, and integrated temperature sensing capability.
Supply support for REF02HSA+ 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 and mixed-signal ICs for industrial, medical, and communications applications.
The REF02 family was engineered specifically for high-stability, multi-function voltage reference needs - combining accurate 5V regulation with a calibrated temperature transducer output in a single SO-8 package.
FAQ
What is the function of Pin 3 (TEMP) on the REF02HSA+?
Pin 3 on the REF02HSA+ is the TEMP terminal, delivering a linear analog voltage proportional to absolute temperature: 630mV at +25°C with a slope of 2.1mV/°C. This output is fully specified and production-tested - unlike the REF01 family where Pin 3 is NC. The REF02HSA+ uses this pin to enable direct temperature measurement without external components, and the datasheet mandates limiting current to ±50nA and capacitance to ≤30pF for accuracy.
Can the REF02HSA+ output voltage be adjusted, and how does it affect performance?
Yes, the REF02HSA+ output voltage can be adjusted over a ±6% range (±300mV around 5V) using an external 10kΩ potentiometer connected to the TRIM pin (Pin 2). Crucially, this adjustment introduces only 0.7ppm/°C change in temperature coefficient per 100mV of output shift - preserving stability. The REF02HSA+ datasheet confirms this behavior is production-guaranteed and applies across the full 0°C to +70°C operating range.
What is the maximum load current the REF02HSA+ can drive while maintaining specification?
The REF02HSA+ guarantees full specification compliance up to 21mA load current, as confirmed in the "ELECTRICAL CHARACTERISTICS-REF02E/REF02H" table. This includes maintaining output voltage accuracy, tempco, and noise performance. At higher loads, output droop increases per the load regulation spec (0.006%/mA typical), and thermal effects may degrade stability - so 21mA is the validated design limit for REF02HSA+ in SO-8 package at TA ≤ +70°C.
How does the REF02HSA+ differ from the REF02EP+ in terms of performance and packaging?
The REF02HSA+ and REF02EP+ share identical electrical specs (25ppm/°C tempco, ±25mV initial error, 10µVP-P noise), but differ in package: REF02HSA+ uses an 8-pin SO (S8-2), while REF02EP+ uses 8-pin Plastic DIP (P8-2). The SO package offers smaller footprint (3.9mm × 4.9mm), surface-mount compatibility, and 300mW power dissipation rating (vs. 500mW for DIP), making REF02HSA+ preferred for space-constrained industrial PCBs where thermal management is controlled.
Is the REF02HSA+ suitable for use in extended temperature range applications beyond 0°C to +70°C?
No - the REF02HSA+ is rated only for 0°C to +70°C operation, as explicitly defined in the ordering table and Absolute Maximum Ratings. For -40°C to +85°C operation, the REF02CESA+ variant must be used; it shares the SO-8 package but is characterized and tested across the extended range with identical 65ppm/°C tempco and ±50mV initial error. Using REF02HSA+ outside its specified range voids parametric guarantees and risks output instability or accelerated aging.
REF02HSA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- REF02
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
REF02HSA+ FAQ
1.How can I place an order for REF02HSA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for REF02HSA+ 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 REF02HSA+ reliable?
The price and inventory of REF02HSA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF02HSA+ is usually 5 days.
3.What payment methods are accepted for REF02HSA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF02HSA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF02HSA+?
REF02HSA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF02HSA+ 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 REF02HSA+?
For technical support, including REF02HSA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF02HSA+ requirements.
6.How does Aetrix verify that REF02HSA+ is sourced from the original manufacturer or authorized distributors?
All REF02HSA+ 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 REF02HSA+ meets industry standards.
7.What is the process for return or replacement of REF02HSA+?
All REF02HSA+ units undergo pre-shipment inspection (PSI). If there is an issue with REF02HSA+, 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 REF02HSA+ part is unused and in its original packaging.
Return procedure for REF02HSA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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