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Analog Devices Inc. REF01EN8
- Part No.:
- REF01EN8
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
REF01EN8.pdf
- Description:
- IC VREF SERIES 0.3% 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,833
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Product details
Overview
REF01EN8 from Analog Devices (formerly Linear Technology) is a precision 10V bandgap voltage reference in an 8-lead plastic DIP package, rated for 0°C to 70°C operation. It delivers ±0.3% initial accuracy, 5ppm/°C typical temperature coefficient, 1.4mA max quiescent current, and 20µVP-P (0.1Hz–10Hz) output noise - enabling high-stability bridge excitation and ADC/DAC reference in industrial instrumentation.
For engineers reviewing the REF01EN8 datasheet, REF01EN8 pinout, REF01EN8 application, or REF01EN8 equivalent, key selection criteria include its guaranteed 8.5ppm/°C max TC over 0°C–70°C, trim-adjustable output (±3%), and compatibility with low-power, moderate-accuracy analog signal chains requiring stable 10V bias without external amplification.
Technical Context
The REF01EN8 implements a thermally compensated bandgap core with internal trimming capability via the TRIM pin, supporting fine adjustment of output voltage within ±3% using an external potentiometer. Its architecture minimizes self-heating effects on regulation, with line regulation specified at 0.0001%/V and load regulation at 0.0005%/mA (0–10mA).
No temperature output pin is present - unlike the REF-02 family, the REF01EN8 is strictly a 10V reference with no integrated temperature-sensing function. All electrical specifications are validated for the N8 (8-lead PDIP) package at 0°C to 70°C ambient, with TJMAX = 100°C and θJA = 130°C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10.00 V nominal, ±0.3% initial accuracy - ensures direct use in 12-bit ADC references without calibration. |
| Temp Coefficient | 5 ppm/°C typical, 8.5 ppm/°C max (0°C–70°C) - supports <±0.5 mV drift over full commercial range. |
| Output Noise | 20 µVP-P, 0.1Hz–10Hz - suitable for precision weigh-scale and strain-gauge amplifier front-ends. |
| Quiescent Current | 1.4 mA max - enables battery-backed systems and low-power data loggers with minimal supply burden. |
| Line Regulation | 0.0001 %/V - maintains stability across wide input variations (12V–40V), critical for unregulated DC supplies. |
| Load Regulation | 0.0005 %/mA (0–10 mA) - allows direct driving of op-amp inputs and low-current DAC references. |
| Input Voltage Range | 12 V to 40 V - accommodates standard industrial 15V/24V rails with margin for ripple and dropout. |
Pinout & Package
REF01EN8 is housed in an 8-lead narrow-body plastic DIP (N8) package per LTC DWG #05-08-1510, with 0.300-inch lead spacing and through-hole mounting. Pin 1 is marked by a notch or dot; pins 1–4 occupy one side, 5–8 the opposite.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Internally unconnected; must remain floating - no external tie required or permitted. |
| 2 (INPUT) | Voltage Input | Accepts 12V–40V unregulated supply; internal regulator drops to stable 10V output. |
| 3 (OUTPUT) | Reference Output | Provides precise 10V output; capable of sourcing up to 10mA or sinking up to 0.3mA. |
| 4 (TRIM) | Adjustment Terminal | Connects to wiper of 10kΩ potentiometer between OUTPUT and GND for ±3% fine tuning. |
| 5 (GND) | Ground Reference | Analog ground return; must be low-impedance and separated from digital/power ground where possible. |
| 6 (NC) | No Connect | Internally unconnected; must remain floating - no external tie required or permitted. |
| 7 (NC) | No Connect | Internally unconnected; must remain floating - no external tie required or permitted. |
| 8 (NC) | No Connect | Internally unconnected; must remain floating - no external tie required or permitted. |
Key Features
| Feature | Design Value |
|---|---|
| Trim-adjustable output | ±3% output voltage adjustment via external potentiometer - enables system-level calibration without component replacement. |
| Low temperature drift | 8.5 ppm/°C max over 0°C–70°C - guarantees ≤±0.85 mV total drift across commercial temperature range. |
| Ultra-low 0.1Hz–10Hz noise | 20 µVP-P - preserves SNR in high-resolution (≥16-bit) measurement systems with slow-sampling requirements. |
| High line rejection | 0.0001 %/V line regulation - rejects supply ripple and transient disturbances without additional filtering. |
| Robust short-circuit protection | Indefinite short-to-ground tolerance - survives accidental output shorts during prototyping or field service. |
Applications
| Bridge Excitation | ADC Reference |
|---|---|
|
Use Scenario: Precision Wheatstone bridge used in load cell or pressure transducer circuits. IC Role / Device Role / Timing Role: Provides stable 10V excitation voltage to bridge arms, directly determining measurement sensitivity and zero-point stability. Use Value: 5ppm/°C TC and 20µVP-P noise ensure bridge output drift remains below 0.01% FS over temperature, meeting Class C industrial sensor specs. |
Use Scenario: 12-bit successive-approximation ADC in programmable logic controller (PLC) analog input module. IC Role / Device Role / Timing Role: Serves as primary voltage reference for ADC conversion, defining full-scale range and LSB size. Use Value: ±0.3% initial accuracy and 0.0005%/mA load regulation eliminate need for post-conversion software correction in factory-calibrated modules. |
| Constant Current Source | Trimmed Precision Regulator |
|
Use Scenario: Low-drift current source for RTD or thermistor biasing in temperature transmitters. IC Role / Device Role / Timing Role: Supplies fixed 10V to precision resistor network generating 1mA or 4mA loop current. Use Value: 1.4mA quiescent current and 10mA output drive allow direct integration into 4–20mA transmitter designs with minimal auxiliary power overhead. |
Use Scenario: Adjustable 10V regulator for analog subsystems requiring calibrated output voltage. IC Role / Device Role / Timing Role: Functions as trimmed shunt or series regulator core, with TRIM pin enabling final system-level voltage setting. Use Value: ±3% trim range and 8.5ppm/°C TC support field recalibration and long-term stability in metrology-grade calibration equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1019CN8#PBF | 0.05% initial accuracy, 5ppm/°C TC, pin-compatible 8-lead PDIP - tighter spec but higher cost and power (2.5mA). | Required for ≥14-bit ADC references or metrology calibrators needing sub-5mV absolute error. | Select when REF01EN8's ±0.3% accuracy is insufficient and budget allows premium performance. |
| REF02EN8#PBF | 5V output (not 10V), includes TEMP pin for linear temperature sensing (620mV @ 25°C, 2.1mV/°C), same N8 package and temp grade. | Suitable for dual-purpose 5V reference + temperature monitoring in compact sensor nodes. | Choose only if system requires 5V reference or integrated temperature output - not a drop-in 10V replacement. |
Compared with REF01EN8, LT1019CN8 offers superior accuracy and drift for high-end test equipment, while REF02EN8 trades 10V output for 5V + temperature sensing - making it complementary rather than substitutable in 10V-referenced designs.
Availability
REF01EN8 is available at Aetrix Electronics and suitable for industrial instrumentation, PLC analog I/O modules, and precision sensor signal conditioning requiring stable component supply with commercial-temperature reliability and long-lifecycle availability.
Supply support for REF01EN8 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 and maintains full product support, manufacturing, and documentation for legacy Linear references including the REF-01/REF-02 family.
The REF-01 series was designed specifically for cost-sensitive, moderate-accuracy analog systems needing robust 10V references with trim capability - targeting industrial control, test equipment, and sensor interfaces.
FAQ
What is the operating temperature range for REF01EN8?
The REF01EN8 is specified for 0°C to 70°C ambient operation, with guaranteed 8.5ppm/°C maximum temperature coefficient across this full range. It uses the N8 (plastic DIP) package, which has a junction temperature limit of 100°C and thermal resistance θJA = 130°C/W. This makes REF01EN8 suitable for commercial and industrial indoor environments but not extended-temperature applications.
Does REF01EN8 provide a temperature output voltage like REF-02?
No, REF01EN8 does not include a temperature output pin. The TEMP pin (Pin 3) is reserved for the REF-02 family only; on REF01EN8, Pin 3 is the OUTPUT terminal. The REF01EN8 is a dedicated 10V reference with no integrated temperature-sensing functionality - all references to "TEMP" in the datasheet apply exclusively to REF-02 variants.
Can REF01EN8 drive a 10kΩ load directly?
Yes, REF01EN8 can drive a 10kΩ load directly. With a nominal 10V output, a 10kΩ load draws 1mA - well within its 10mA sourcing capability. Load regulation is specified at 0.0005%/mA, so the output will shift by only 5µV under this condition. No buffer amplifier is needed for typical op-amp or ADC reference inputs with >10kΩ impedance.
What is the purpose of the TRIM pin on REF01EN8?
The TRIM pin (Pin 4) on REF01EN8 enables fine adjustment of the output voltage within ±3% of nominal 10V using an external 10kΩ potentiometer connected between OUTPUT and GND, with the wiper tied to TRIM. This allows system-level calibration to compensate for PCB trace resistance, layout parasitics, or downstream component tolerances - eliminating the need for laser-trimmed references in cost-sensitive designs.
Is REF01EN8 RoHS-compliant and lead-free?
Yes, REF01EN8#PBF is RoHS-compliant and features a lead-free finish, as indicated by the "#PBF" suffix in the ordering code. The device meets JEDEC J-STD-020 moisture sensitivity level (MSL) requirements for the N8 package and is qualified for standard reflow soldering profiles. Full compliance documentation is available in Analog Devices' official product change notices.
REF01EN8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Series:
- REF01
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 10V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.3%
- Temperature Coefficient:
- 8.5ppm/°C
- Noise - 0.1Hz to 10Hz:
- 20µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 12V ~ 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
REF01EN8 FAQ
1.How can I place an order for REF01EN8 through Aetrix?
Please submit a Request for Quotation (RFQ) for REF01EN8 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 REF01EN8 reliable?
The price and inventory of REF01EN8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF01EN8 is usually 5 days.
3.What payment methods are accepted for REF01EN8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF01EN8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF01EN8?
REF01EN8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF01EN8 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 REF01EN8?
For technical support, including REF01EN8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF01EN8 requirements.
6.How does Aetrix verify that REF01EN8 is sourced from the original manufacturer or authorized distributors?
All REF01EN8 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 REF01EN8 meets industry standards.
7.What is the process for return or replacement of REF01EN8?
All REF01EN8 units undergo pre-shipment inspection (PSI). If there is an issue with REF01EN8, 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 REF01EN8 part is unused and in its original packaging.
Return procedure for REF01EN8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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