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Analog Devices Inc./Maxim Integrated REF01EP+
- Part No.:
- REF01EP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
REF01EP+.pdf
- Description:
- IC VREF SERIES 0.3% 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,375
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Product details
Overview
REF01EP+ from Maxim Integrated is a precision 10V voltage reference IC in an 8-pin plastic DIP package, rated for 0°C to +70°C operation, with ±30mV initial output error, 8.5ppm/°C max temperature coefficient, and 1mA quiescent current - used as a stable reference in high-accuracy ADCs, DACs, and calibration standards.
For engineers reviewing the REF01EP+ datasheet, REF01EP+ pinout, REF01EP+ application, or REF01EP+ equivalent, this page delivers verified electrical parameters, thermal stability data, trim-adjustable output behavior, and real-world use cases for analog signal chain design and metrology-grade systems.
Technical Context
The REF01EP+ implements a bandgap-based reference core with internal trimming for 10V nominal output, supporting ±6% adjustment via external potentiometer without degrading temperature stability beyond 0.7ppm/°C per 100mV of trim. It operates from 13V to 33V input and delivers up to 10mA load current while maintaining ±0.01% line and load regulation over its full temperature range.
Unlike the REF02 series, REF01EP+ has no TEMP pin - pin 3 is NC - and does not provide temperature transduction. Its noise performance is specified at 20–30µVP-P (0.1Hz–10Hz), and it features short-circuit protection with indefinite output shorting capability to ground or VIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10.00 V ±30 mV at 25°C - sets absolute accuracy baseline for system-level calibration. |
| Tempco (Max) | 8.5 ppm/°C - ensures ≤±0.7 mV drift over 0°C to +70°C operating range. |
| Initial Error | ±30 mV - defines worst-case offset before system trimming. |
| Quiescent Current | 1.4 mA max - enables low-power operation in battery-backed or energy-constrained designs. |
| Input Voltage Range | 13 V to 33 V - supports wide supply headroom for industrial 24V rails and legacy 15V systems. |
| Output Adjustment | ±6% (±600 mV) via external 10kΩ pot - allows binary-aligned 10.240V setting for 10-bit ADC full-scale alignment. |
| Short-Circuit Protection | Indefinite duration to ground or VIN - eliminates need for external current-limiting circuitry. |
Pinout & Package
REF01EP+ uses an 8-pin plastic dual in-line package (P8-2), with 0.3-inch body width and through-hole mounting. Pin 1 is VOUT, pin 2 is TRIM, pin 4 is GND, pin 5 is VOUT (redundant output), pin 6 is VIN, and pins 3, 7, 8 are NC (no connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5 | VOUT | Dual-output pins for low-impedance 10V reference delivery; reduces trace inductance in high-precision layouts. |
| 2 | TRIM | Adjustment node for external 10kΩ potentiometer; enables system-level calibration without recalibration hardware. |
| 4 | GND | Analog ground reference; must be star-connected to minimize noise coupling into reference path. |
| 6 | VIN | Unregulated input supply; requires ≥13V for proper regulation and ≥3V headroom above output. |
| 3, 7, 8 | NC | No internal connection; must remain unconnected - floating or tied to GND per layout best practice. |
Key Features
| Feature | Design Value |
|---|---|
| Pretrimmed 10V output | Guaranteed 9.97–10.03V at 25°C - eliminates factory calibration step in production test. |
| Low TCVO sensitivity to trim | 0.7 ppm/°C per 100mV output shift - preserves thermal stability even after field calibration. |
| Wide input voltage range | 13V–33V operation - compatible with unregulated 24V industrial supplies and legacy ±15V systems. |
| Short-circuit robustness | Indefinite short-to-ground or VIN - removes need for fuse or current-limiting resistor in safety-critical paths. |
| Low-noise reference | 20–30 µVP-P (0.1Hz–10Hz) - suitable for 16-bit+ data acquisition where reference noise dominates SNR. |
Applications
| High-Accuracy Data Acquisition | Precision Calibration Standards |
|---|---|
Use Scenario: 16-bit SAR ADC in portable multimeter requiring <0.01% full-scale accuracy across temperature. IC Role / Device Role / Timing Role: Primary voltage reference establishing absolute scale for digitized measurements. Use Value: 8.5ppm/°C tempco and ±30mV initial error enable single-point calibration at room temperature with <±0.5 LSB drift over 0°C–70°C. |
Use Scenario: Benchtop calibration source for verifying DMMs and process calibrators. IC Role / Device Role / Timing Role: Stable 10.000V reference node with adjustable output for traceable voltage generation. Use Value: ±6% trim range supports exact 10.240V setting for binary-aligned full-scale, while low noise ensures clean DC output. |
| Industrial Analog I/O Modules | Programmable Logic Controller (PLC) Input Conditioning |
Use Scenario: 4–20mA transmitter with integrated ADC/DAC using shared reference for ratiometric conversion. IC Role / Device Role / Timing Role: Common reference for both ADC and DAC to eliminate gain mismatch errors. Use Value: Dual VOUT pins (pins 1 & 5) reduce routing impedance asymmetry, improving channel-to-channel matching in multi-channel modules. |
Use Scenario: PLC analog input card measuring 0–10V sensor signals with 12-bit resolution. IC Role / Device Role / Timing Role: Reference for precision op-amp buffer and ADC front-end scaling network. Use Value: 1mA quiescent current enables low-power standby mode; short-circuit protection prevents latch-up during field wiring faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF01HP+ | Higher 25ppm/°C max tempco and ±50mV initial error; otherwise identical pinout, package, and trim architecture. | Suitable for cost-sensitive industrial applications where ±1.75mV total drift over 0°C–70°C is acceptable. | Select REF01HP+ when thermal stability requirements are relaxed and BOM cost reduction is prioritized. |
| MAX6035AESA+ | Lower 5ppm/°C tempco and ±10mV initial error; 8-pin SO package; 3V to 5.5V supply; no trim pin. | Designed for low-voltage, space-constrained systems - incompatible with REF01EP+'s 13–33V input or adjustability. | Choose MAX6035AESA+ only for new 3.3V/5V designs requiring higher accuracy but no output adjustment capability. |
Compared with REF01HP+, REF01EP+ offers tighter initial error and lower tempco for metrology-grade accuracy; compared with MAX6035AESA+, it trades modern low-voltage compatibility and ultra-low drift for wide-input flexibility and field-trimmable output - making REF01EP+ optimal for legacy 15V/24V systems needing recalibration support.
Availability
REF01EP+ is available at Aetrix Electronics and suitable for high-accuracy data acquisition, precision calibration standards, and industrial analog I/O modules requiring stable component supply across extended production lifecycles.
Supply support for REF01EP+ 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) is a U.S.-based semiconductor company specializing in precision analog, mixed-signal, and power management ICs for industrial, medical, and communications systems.
The REF01 product line was designed specifically for high-stability, trimmable voltage references in test equipment, instrumentation, and industrial control - emphasizing long-term drift immunity and robustness under varying supply conditions.
FAQ
What is the maximum input voltage for REF01EP+?
The absolute maximum input voltage for REF01EP+ is 40V, but functional operation is guaranteed only between 13V and 33V. Operating above 33V risks exceeding the 500mW power dissipation limit in the P8-2 package, especially at elevated temperatures. REF01EP+ must maintain ≥3V headroom above its 10V output to ensure regulation integrity.
Can REF01EP+ be used as a 10.240V reference for binary-aligned ADCs?
Yes, REF01EP+ supports precise 10.240V output via its TRIM pin (pin 2) with a 10kΩ potentiometer. The ±6% adjustment range covers 9.4V to 10.6V, and the device maintains its 8.5ppm/°C tempco within ±0.7ppm/°C per 100mV of trim - ensuring that 10.240V remains stable across 0°C to +70°C without recalibration.
Does REF01EP+ have a temperature output pin like REF02?
No, REF01EP+ does not include a temperature transducer function. Pin 3 is explicitly marked NC (no connection) in the datasheet and pinout diagram. In contrast, REF02 variants feature a TEMP pin (pin 3) delivering 2.1mV/°C output. REF01EP+ is strictly a 10V reference with no built-in temperature sensing capability.
What is the load current capability of REF01EP+?
REF01EP+ delivers up to 10mA of sourced load current while maintaining output voltage within specification (±0.01% load regulation). At 21mA, output error exceeds tolerance limits. Sink capability is limited to 0.5mA. For loads >10mA, an external buffer amplifier is required to preserve accuracy and thermal stability.
Is REF01EP+ RoHS-compliant and lead-free?
Yes, the "+" suffix in REF01EP+ denotes a lead-free, RoHS-compliant package. It uses matte tin plating on leads and meets JEDEC J-STD-020 moisture sensitivity level (MSL) 1 specifications. The plastic DIP package (P8-2) is rated for soldering at +300°C for 60 seconds, consistent with standard lead-free reflow profiles.
REF01EP+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Series:
- REF01
- Packaging:
- Tube
- Product Status:
- Obsolete
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 10V
- Voltage - Output (Max):
- -
- Current - Output:
- 21 mA
- Tolerance:
- ±0.3%
- Temperature Coefficient:
- 8.5ppm/°C
- Noise - 0.1Hz to 10Hz:
- 20µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 13V ~ 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
REF01EP+ FAQ
1.How can I place an order for REF01EP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for REF01EP+ 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 REF01EP+ reliable?
The price and inventory of REF01EP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF01EP+ is usually 5 days.
3.What payment methods are accepted for REF01EP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF01EP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF01EP+?
REF01EP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF01EP+ 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 REF01EP+?
For technical support, including REF01EP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF01EP+ requirements.
6.How does Aetrix verify that REF01EP+ is sourced from the original manufacturer or authorized distributors?
All REF01EP+ 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 REF01EP+ meets industry standards.
7.What is the process for return or replacement of REF01EP+?
All REF01EP+ units undergo pre-shipment inspection (PSI). If there is an issue with REF01EP+, 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 REF01EP+ part is unused and in its original packaging.
Return procedure for REF01EP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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