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Analog Devices Inc./Maxim Integrated REF02HSA+T
- Part No.:
- REF02HSA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
REF02HSA+T.pdf
- Description:
- IC VREF SERIES 0.5% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,643
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Product details
Overview
REF02HSA+T from Maxim Integrated is a precision 5V voltage reference with integrated linear temperature transducer output (TEMP pin), designed for high-accuracy analog systems requiring stable reference and on-chip temperature sensing. It delivers ±25mV initial output error, 25ppm/°C max temperature coefficient over 0°C to +70°C, 10µVP-P low-frequency noise (0.1Hz–10Hz), and operates from 7V to 33V input with 1.4mA max quiescent current. Used in precision ADC/DAC calibration and remote temperature monitoring circuits.
For engineers reviewing the REF02HSA+T datasheet, REF02HSA+T pinout, REF02HSA+T application, or REF02HSA+T equivalent, key selection criteria include its dual-function 5V reference + temperature voltage output (630mV at 25°C, 2.1mV/°C slope), SO-8 package compatibility, trim-adjustable ±6% output range, and guaranteed short-circuit protection without derating.
Technical Context
The REF02HSA+T implements a bandgap-based reference core with buffered 5V output and a dedicated TEMP pin delivering a linear absolute-temperature-proportional voltage. Its trim terminal enables ±300mV adjustment around 5V while maintaining <0.7ppm/°C/100mV degradation in temperature coefficient.
It features internal short-circuit protection, 230µs turn-on settling to ±0.1%, and load regulation of 0.010%/mA (IL = 0–8mA) across its operating temperature range. The TEMP pin requires ≤50nA current sourcing/sinking and ≤30pF capacitance for accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.975V to 5.025V at 25°C - ensures ±0.5% factory-trimmed accuracy before system calibration |
| Tempco (Max) | 25ppm/°C over 0°C to +70°C - limits worst-case drift to ±1.75mV across full industrial range |
| Initial Error | ±25mV - supports direct use in 12-bit systems without trimming in many applications |
| Output Noise | 10µVP-P (0.1Hz–10Hz) - enables sub-LSB stability in 16-bit SAR ADC references |
| Input Range | 7V to 33V - allows operation from standard 9V batteries up to unregulated 24V rails |
| TEMP Output | 630mV at 25°C, 2.1mV/°C slope - provides calibrated ratiometric temperature readout without external components |
| Quiescent Current | 1.4mA max - enables low-power portable instrumentation with minimal supply loading |
Pinout & Package
REF02HSA+T is housed in an 8-pin Small Outline (SO) package (S8-2), surface-mount compatible with JEDEC MS-012AC footprint, 1.75mm max height, and lead-free (RoHS-compliant) finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VOUT | Reference output | Stable 5V source; capable of sourcing/sinking up to 21mA with <0.010%/mA load regulation |
| 2 - TRIM | Voltage adjustment node | Connects to 10kΩ potentiometer for ±6% output tuning; <0.7ppm/°C/100mV tempco impact |
| 3 - TEMP | Temperature transducer output | Linear 2.1mV/°C output referenced to GND; requires ≤30pF capacitance and ≤50nA load |
| 4 - GND | Analog ground reference | Common return for VOUT, TEMP, and internal circuitry; must be low-impedance for noise immunity |
| 5 - N.C. | No connection | Internally unconnected; must remain floating or tied to GND per layout best practices |
| 6 - N.C. | No connection | Internally unconnected; must remain floating or tied to GND per layout best practices |
| 7 - N.C. | No connection | Internally unconnected; must remain floating or tied to GND per layout best practices |
| 8 - VIN | Positive supply input | Accepts 7V–33V; includes internal overvoltage protection up to 40V absolute maximum |
Key Features
| Feature | Design Value |
|---|---|
| Dual-output functionality | Simultaneous precision 5V reference and calibrated temperature voltage output eliminates need for separate sensor IC |
| Trim-adjustable reference | ±6% output tuning via external potentiometer enables system-level calibration without firmware changes |
| Low wideband noise | 10µVP-P (0.1Hz–10Hz) supports high-resolution data acquisition without external filtering |
| Short-circuit protected output | Indefinite short-to-ground or short-to-VIN tolerance enables robust field deployment without external current limiting |
| Stable thermal performance | 25ppm/°C max tempco ensures <±1.75mV total drift over 0°C to +70°C, critical for metrology-grade instruments |
Applications
| High-Accuracy Data Acquisition | Portable Temperature Monitoring |
|---|---|
Use Scenario: 16-bit SAR ADC in handheld multimeter requiring stable reference and on-board temperature compensation. IC Role / Device Role / Timing Role: REF02HSA+T serves as primary 5V reference for ADC conversion and supplies TEMP voltage to microcontroller ADC for ambient temperature correction. Use Value: Eliminates discrete temperature sensor and external reference IC, reducing BOM count by two components while maintaining ±0.1°C thermal measurement accuracy. | Use Scenario: Battery-powered environmental logger measuring temperature every 10 seconds with ultra-low standby power. IC Role / Device Role / Timing Role: REF02HSA+T provides regulated 5V rail for MCU and sensor interface, while its TEMP pin feeds a low-power ADC channel for direct Celsius reading. Use Value: Achieves 2.1mV/°C linearity and 630mV @25°C offset - enabling single-point calibration and <±0.5°C accuracy over –20°C to +60°C without lookup tables. |
| Calibrated Industrial Transmitter | Lab-Grade Calibration Standard |
Use Scenario: 4–20mA loop-powered transmitter where output scaling must track ambient temperature drift. IC Role / Device Role / Timing Role: REF02HSA+T supplies precise 5V reference to DAC and uses TEMP pin to dynamically adjust gain in analog front-end amplifier. Use Value: Compensates for op-amp and resistor tempcos using real-time TEMP voltage, improving long-term stability to <50ppm/°C system-level drift. | Use Scenario: Benchtop calibration source generating exact 5.000V outputs traceable to national standards. IC Role / Device Role / Timing Role: REF02HSA+T acts as primary reference with TRIM pin adjusted via precision pot to hit exact 5.000V at 25°C; TEMP pin verifies thermal equilibrium. Use Value: Enables ±25mV initial error correction to <±0.1mV using external 10-turn pot, meeting ISO/IEC 17025 calibration lab requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference with temperature sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF02CSA+ | Higher 65ppm/°C max tempco and ±50mV initial error; same SO-8 package and pinout | Suitable for cost-sensitive industrial controls where ±0.1% reference accuracy suffices | Select REF02CSA+ only when tighter tempco is not required and budget constraints dominate |
| MAX6035AESA+ | Lower 5ppm/°C tempco and ±0.05% initial accuracy; no TEMP pin; 8-pin SO package | Better for pure reference applications needing highest stability, but lacks integrated temperature sensing | Choose MAX6035AESA+ when reference precision is paramount and temperature sensing is handled separately |
Compared with REF02HSA+T, REF02CSA+ trades accuracy for cost while retaining identical functionality and pin compatibility, whereas MAX6035AESA+ improves reference stability significantly but removes the TEMP transducer-requiring external sensing if thermal monitoring remains essential.
Availability
REF02HSA+T is available at Aetrix Electronics and suitable for precision data acquisition, portable instrumentation, industrial transmitters, and calibration equipment requiring stable component supply with consistent parametric performance across production lots.
Supply support for REF02HSA+T 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 high-performance analog and mixed-signal ICs for precision, power, and interface applications across industrial, medical, and communications markets.
The REF02 product line delivers industry-standard 5V precision voltage references with integrated temperature transducer functionality, targeting applications demanding both accurate reference and calibrated thermal feedback in a single SO-8 package.
FAQ
What is the function of Pin 3 (TEMP) on the REF02HSA+T?
Pin 3 on the REF02HSA+T is the TEMP output terminal, delivering a linear voltage proportional to absolute temperature: 630mV at 25°C with a slope of 2.1mV/°C. This output requires ≤50nA load current and ≤30pF capacitance to maintain accuracy. It is unused (N.C.) on REF01 variants. The REF02HSA+T leverages this pin to enable direct temperature measurement without external sensors, making it ideal for self-calibrating systems.
Can the REF02HSA+T output voltage be adjusted, and how does trimming affect accuracy?
Yes, the REF02HSA+T output voltage can be adjusted ±6% (±300mV) around 5V using an external 10kΩ potentiometer connected to the TRIM pin (Pin 2). Adjustment introduces minimal degradation: temperature coefficient increases by only ~0.7ppm/°C per 100mV of trim deviation. This allows system-level calibration of REF02HSA+T while preserving high stability - critical for metrology and test equipment where REF02HSA+T serves as a tunable reference.
What is the maximum allowable input voltage for the REF02HSA+T, and what happens beyond that?
The REF02HSA+T supports an input voltage range of 7V to 33V under normal operation, with an absolute maximum rating of 40V. Exceeding 40V may cause permanent damage. Within the 7V–33V range, line regulation remains ≤0.010%/V, and quiescent current stays below 1.4mA. The REF02HSA+T includes internal protection against transient overvoltage, but sustained operation above 33V risks exceeding its 300mW SO-package power dissipation limit and degrading long-term reliability.
How does the REF02HSA+T compare to the REF01 family in terms of output voltage and functionality?
The REF02HSA+T provides a fixed 5V nominal output with integrated TEMP pin functionality, whereas REF01 variants deliver 10V output and lack temperature sensing. Both share identical SO-8 packaging, trim capability, and protection features. The REF02HSA+T's 5V output suits modern low-voltage logic and ADCs, while its TEMP pin adds value in thermal-aware systems - a capability absent in all REF01 parts. This makes REF02HSA+T uniquely suited where dual reference + sensing is needed in one device.
Is the REF02HSA+T RoHS-compliant and lead-free?
Yes, the REF02HSA+T is RoHS-compliant and lead-free, indicated by the "+" suffix in its ordering code. It meets JEDEC J-STD-609 Category 1 marking requirements and is qualified for reflow soldering per IPC/JEDEC J-STD-020. The SO-8 package uses matte tin (Sn) termination with no lead content, ensuring compliance with global environmental regulations. This applies specifically to the REF02HSA+T variant - non-"+" versions such as REF02HSA are not lead-free.
REF02HSA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- REF02
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for REF02HSA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for REF02HSA+T 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+T reliable?
The price and inventory of REF02HSA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF02HSA+T is usually 5 days.
3.What payment methods are accepted for REF02HSA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF02HSA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF02HSA+T?
REF02HSA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF02HSA+T 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+T?
For technical support, including REF02HSA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF02HSA+T requirements.
6.How does Aetrix verify that REF02HSA+T is sourced from the original manufacturer or authorized distributors?
All REF02HSA+T 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+T meets industry standards.
7.What is the process for return or replacement of REF02HSA+T?
All REF02HSA+T units undergo pre-shipment inspection (PSI). If there is an issue with REF02HSA+T, 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+T part is unused and in its original packaging.
Return procedure for REF02HSA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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