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Analog Devices Inc. REF02HN8
- Part No.:
- REF02HN8
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
REF02HN8.pdf
- Description:
- IC VREF SERIES 0.5% 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,506
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Product details
Overview
REF02HN8 from Analog Devices (formerly Linear Technology) is a precision 5V bandgap voltage reference with temperature-sensing output, designed for high-stability analog signal chains. It delivers ±0.3% initial accuracy, 5ppm/°C typical temperature coefficient over 0°C to 70°C, and 10μVP-P (0.1Hz–10Hz) output noise - used in precision bridge excitation, A/D converter reference, and constant-current source circuits.
For engineers reviewing the REF02HN8 datasheet, REF02HN8 pinout, REF02HN8 application, or REF02HN8 equivalent, key selection criteria include its integrated temperature output (620mV at 25°C), low 1.4mA max supply current, 8-lead PDIP package, and guaranteed performance across 0°C to 70°C industrial temperature range.
Technical Context
The REF02HN8 implements a trimmed bandgap core with buffered output and dedicated temperature-sensing terminal (Pin 3). Its architecture separates reference generation from temperature transduction, enabling simultaneous use of stable 5V output and linear mV/°C temperature voltage without loading interference.
It features internal trimming for output accuracy and TC optimization, supports adjustable output via external resistors (±3% range), and maintains load regulation of 0.001%/mA (0–10mA) and line regulation of 0.0001%/V - critical for metrology-grade instrumentation where supply and load variations must not perturb reference integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000 V nominal, ±0.3% initial accuracy - ensures direct compatibility with 5V ADCs/DACs without calibration overhead. |
| Tempco (TC) | 5 ppm/°C typical (0°C to 70°C) - limits drift to ≤0.35 mV over full industrial range, enabling sub-0.01% system accuracy. |
| Output Noise | 10 μVP-P, 0.1Hz–10Hz - preserves resolution in 18-bit+ data acquisition systems without external filtering. |
| Temperature Output | 620 mV at 25°C, +2.1 mV/°C slope - provides calibrated absolute temperature sensing without external sensor or signal conditioning. |
| Supply Current | 1.4 mA maximum - enables low-power operation in battery-backed or energy-constrained precision systems. |
| Input Voltage Range | 7 V to 40 V - accommodates wide input rails including unregulated 12V/24V industrial supplies with margin. |
| Load Regulation | 0.001%/mA (0–10 mA) - maintains stability under dynamic load changes typical in programmable current sources. |
Pinout & Package
REF02HN8 is housed in an 8-lead narrow-body plastic DIP (N8 package), 0.300" width, with JEDEC MS-001 compliant footprint. Pin 1 is marked by notch or dot; case ground (Pin 5) is internally connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC (No Connect) | Internally unused - must remain floating; no external connection permitted. |
| 2 | INPUT | Reference input supply rail - accepts 7V–40V DC; decoupling capacitor required near pin for noise rejection. |
| 3 | TEMP | Temperature-sensing output - delivers 620 mV @ 25°C, +2.1 mV/°C; limited to ±50 nA current and ≤30 pF capacitance. |
| 4 | GND | Analog ground reference - connects to system AGND plane; shares thermal path with case (Pin 5). |
| 5 | GND (CASE) | Metal can ground - electrically tied to Pin 4; provides EMI shielding and thermal conduction path. |
| 6 | TRIM | Output adjustment node - enables ±3% fine-tuning via external resistor divider; affects tempco minimally (0.5 ppm/%). |
| 7 | OUTPUT | Stable 5V reference output - capable of sourcing up to 10 mA or sinking –0.3 mA; low impedance buffer stage. |
| 8 | NC (No Connect) | Internally unused - must remain floating; no external connection permitted. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-output functionality | Simultaneous 5V precision reference and linear temperature voltage (620 mV @ 25°C) - eliminates need for separate temp sensor in compact designs. |
| Trimmed bandgap core | Factory-trimmed for ±0.3% initial accuracy and 5 ppm/°C TC - reduces system-level calibration burden and improves long-term stability. |
| Low-noise buffered output | 10 μVP-P (0.1Hz–10Hz) noise floor - supports high-resolution data conversion without added post-filtering stages. |
| Wide input voltage tolerance | Operates from 7V to 40V input - simplifies power architecture in mixed-rail industrial systems with minimal dropout headroom. |
| Adjustable output range | ±3% output trim via external resistors - enables fine calibration for system-specific gain/offset compensation. |
Applications
| Bridge Excitation | A/D Converter Reference |
|---|---|
Use Scenario: Precision Wheatstone bridge powered by stable excitation voltage for strain gauge or pressure sensor measurement. IC Role / Device Role / Timing Role: Provides low-drift, low-noise 5V excitation and monitors ambient temperature for thermal error compensation. Use Value: Enables <0.01% nonlinearity error over temperature using on-chip TEMP pin feedback without external components. |
Use Scenario: High-accuracy 16–18-bit SAR or sigma-delta ADC requiring stable reference voltage in test equipment or data loggers. IC Role / Device Role / Timing Role: Serves as primary reference source with minimal code-width variation due to ultra-low 10μVP-P noise and 5ppm/°C drift. Use Value: Maintains ENOB ≥17.2 bits over 0°C–70°C without recalibration, directly supporting metrology-grade specifications. |
| Constant Current Source | Trimmed Precision Regulator |
Use Scenario: Programmable current source for LED biasing, sensor excitation, or electrochemical cell control. IC Role / Device Role / Timing Role: Supplies precise 5V reference to op-amp feedback network controlling MOSFET gate drive. Use Value: Delivers <0.02% current stability over line/load/temperature - critical for repeatable sensor response and compliance testing. |
Use Scenario: Low-drift, adjustable ±5V or ±10V dual-rail regulator in analog front-end modules for medical or audio applications. IC Role / Device Role / Timing Role: Acts as master reference for series-pass transistor control loop, with TRIM pin enabling factory-set output voltage. Use Value: Achieves <0.05% output tolerance and <10 ppm/°C effective tempco after trim - surpassing standard fixed regulators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1019CS8#PBF | 0.05% initial accuracy, 5ppm/°C TC, pin-compatible 8-lead SOIC - higher accuracy but no temperature output pin. | Lacks integrated temperature sensing; requires external sensor for thermal compensation. | Choose when highest initial accuracy and lowest drift are prioritized over dual-output capability. |
| REF02EN8#PBF | Same 5V output, ±0.3% accuracy, identical N8 package - rated for 0°C to 70°C but with 8.5ppm/°C max TC (vs. 5ppm/°C typ for H grade). | Higher guaranteed tempco spreads output drift across temperature - less suitable for wide-range uncalibrated use. | Choose for cost-sensitive applications where 8.5ppm/°C worst-case drift is acceptable and temperature sensing is unused. |
Compared with REF02EN8#PBF and LT1019CS8#PBF, REF02HN8 uniquely combines factory-trimmed 5ppm/°C typical tempco, integrated temperature output, and industrial-grade reliability in PDIP - making it optimal for space-constrained, thermally compensated precision analog systems where dual functionality reduces BOM count.
Availability
REF02HN8 is available at Aetrix Electronics and suitable for precision bridge excitation, high-resolution A/D conversion, and constant-current source applications requiring stable component supply across industrial temperature ranges.
Supply support for REF02HN8 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
Analog Devices (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The REF-01/REF-02 family was designed for cost-effective, high-stability voltage referencing in instrumentation and sensor interfaces - emphasizing low drift, low noise, and integrated diagnostics like temperature output.
FAQ
What is the operating temperature range specified for REF02HN8?
The REF02HN8 is rated for 0°C to 70°C operation, as confirmed by Linear Technology's official ordering information table listing REF02HN8#PBF under "0°C to 70°C" temperature range for the N8 package. This range applies to all electrical specifications unless otherwise noted, and aligns with the H-grade designation in the REF-01/REF-02 family datasheet.
Does REF02HN8 provide a temperature output, and how is it used?
Yes, REF02HN8 provides a dedicated temperature output on Pin 3 (TEMP), delivering 620 mV at 25°C with a linear +2.1 mV/°C slope. It is intended for absolute temperature monitoring and must be loaded with ≤50 nA current and ≤30 pF capacitance to maintain accuracy - REF02HN8 uses this pin to enable real-time thermal compensation without external sensors.
Can REF02HN8 be adjusted, and what is the adjustment range?
Yes, REF02HN8 supports output voltage adjustment via the TRIM pin (Pin 6) using an external resistor divider. The datasheet specifies a ±3% adjustment range when RP = 10 kΩ, and confirms that tempco shift due to trimming is only 0.5 ppm/% - REF02HN8 retains high stability even after factory or field calibration.
What is the maximum load current REF02HN8 can source or sink?
REF02HN8 can source up to 10 mA and sink up to –0.3 mA while maintaining specified load regulation (0.001%/mA). This capability supports direct driving of op-amp inputs, ADC references, and small discrete loads - REF02HN8 remains stable under these conditions without external buffering.
Is REF02HN8 pin-compatible with other members of the REF-01/REF-02 family?
Yes, REF02HN8 shares identical 8-lead PDIP (N8) pinout with all REF-02 variants in the same package, including REF02EN8#PBF and REF02CN8#PBF. Pin functions - INPUT (2), TEMP (3), GND (4/5), TRIM (6), OUTPUT (7) - are consistent across H, E, and C grades in N8 packaging - REF02HN8 drops into existing layouts designed for those variants.
REF02HN8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Series:
- REF02
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 25ppm/°C
- Noise - 0.1Hz to 10Hz:
- 10µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 7V ~ 40V
- Current - Supply:
- 1.4mA
- Current - Cathode:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
REF02HN8 FAQ
1.How can I place an order for REF02HN8 through Aetrix?
Please submit a Request for Quotation (RFQ) for REF02HN8 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 REF02HN8 reliable?
The price and inventory of REF02HN8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF02HN8 is usually 5 days.
3.What payment methods are accepted for REF02HN8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF02HN8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF02HN8?
REF02HN8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF02HN8 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 REF02HN8?
For technical support, including REF02HN8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF02HN8 requirements.
6.How does Aetrix verify that REF02HN8 is sourced from the original manufacturer or authorized distributors?
All REF02HN8 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 REF02HN8 meets industry standards.
7.What is the process for return or replacement of REF02HN8?
All REF02HN8 units undergo pre-shipment inspection (PSI). If there is an issue with REF02HN8, 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 REF02HN8 part is unused and in its original packaging.
Return procedure for REF02HN8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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