My Inquiry
My Account
Analog Devices Inc. REF01EH
- Part No.:
- REF01EH
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- TO-205-8, TO-5-8 Metal Can
- Datasheet:
-
REF01EH.pdf
- Description:
- IC VREF SERIES 10V TO-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,984
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
REF01EH from Analog Devices (formerly Linear Technology) is a precision 10V bandgap voltage reference in an 8-lead TO-5 metal can package, delivering ±0.3% initial accuracy, 5ppm/°C typical temperature coefficient over 0°C to 70°C, 20µVP-P (0.1Hz–10Hz) output noise, and 1.4mA max quiescent current. It serves as a stable reference for high-resolution data converters and precision regulators in industrial instrumentation.
For engineers reviewing the REF01EH datasheet, REF01EH pinout, REF01EH application, or REF01EH equivalent, key selection criteria include its guaranteed 0°C to 70°C operating range, low-drift performance without external trimming, compatibility with load currents up to 10mA, and thermal stability critical for bridge excitation and calibrated sensor signal chains.
Technical Context
The REF01EH implements a compensated bandgap core with internal trimming to achieve tight initial accuracy and low thermal drift. Its output is buffered to support load currents up to 10mA while maintaining line regulation of 0.0001%/V and load regulation of 0.0005%/mA.
Unlike the REF-02 variant, REF01EH omits the temperature-sensing pin (Pin 3), simplifying use where only a stable 10V reference is required. The TO-5 metal can package provides hermetic sealing and superior thermal dissipation (θJA = 150°C/W, θJC = 45°C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10.00 V ±0.3% (9.97–10.03 V at 0 mA load; enables direct 10V scaling in 16-bit DACs) |
| Temp Coefficient | 5 ppm/°C typical (0.0005%/°C; ensures <0.35 mV drift over 0°C–70°C ambient) |
| Output Noise | 20 µVP-P, 0.1Hz–10Hz (low-frequency stability critical for precision weigh scales) |
| Quiescent Current | 1.4 mA max (enables low-power operation in battery-backed calibration circuits) |
| Line Regulation | 0.0001 %/V (0.01 ppm/V; rejects supply ripple without additional filtering) |
| Load Regulation | 0.0005 %/mA (0.05 ppm/mA; maintains accuracy across 0–10 mA load variation) |
| Input Voltage Range | 12 V to 40 V (supports wide-input industrial power rails with margin) |
Pinout & Package
REF01EH uses an 8-lead TO-5 metal can (H package) with hermetic sealing and case-grounded thermal path. Pin 1 is designated by orientation mark; Pins 1, 2, and 4 are internally connected NC terminals and must remain unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | No Connect (NC) | Internally tied; no external connection permitted - avoids parasitic loading |
| Pin 2 | No Connect (NC) | Internally tied; floating connection would degrade long-term stability |
| Pin 3 | Not Used | Omitted on REF01EH (temperature output only on REF-02 variants); leave open |
| Pin 4 | No Connect (NC) | Internally tied; external connection risks reference error or oscillation |
| Pin 5 | Input (VIN) | Accepts 12–40 V DC input; requires ≥2 V headroom above 10 V output |
| Pin 6 | Output (VOUT) | Stable 10 V reference output; capable of sourcing up to 10 mA |
| Pin 7 | Trim (ADJ) | Adjustment node for ±3% output fine-tuning via external resistor divider |
| Pin 8 | GND (Case) | Hermetically sealed metal case serves as ground return and thermal sink |
Key Features
| Feature | Design Value |
|---|---|
| Initial Accuracy | ±0.3% trimmed at 25°C - eliminates need for system-level calibration in factory-set instruments |
| Low Temperature Drift | 5 ppm/°C typical - ensures ≤0.35 mV total drift across full 0°C–70°C operating range |
| Ultra-Low 0.1Hz–10Hz Noise | 20 µVP-P - preserves effective resolution in 24-bit sigma-delta ADC applications |
| High Line Rejection | 0.0001 %/V - minimizes sensitivity to unregulated supply variations in PLC analog inputs |
| Robust Input Range | 12 V to 40 V operation - accommodates wide-input industrial power supplies with safety margin |
Applications
| High-Resolution Data Acquisition | Precision Voltage Regulators |
|---|---|
|
Use Scenario: 16-bit and 24-bit SAR/sigma-delta ADC systems requiring stable reference for accurate digitization of sensor signals. IC Role / Device Role / Timing Role: Primary 10V reference source for ADC internal conversion ladder and external gain-setting circuitry. Use Value: ±0.3% initial tolerance and 5 ppm/°C drift ensure <0.005% total error contribution over temperature - meeting EN 61000-6-2 immunity requirements. |
Use Scenario: Low-drift, low-noise series or shunt regulator designs for metrology-grade power supplies. IC Role / Device Role / Timing Role: Reference element in op-amp feedback loop controlling pass transistor output voltage. Use Value: 20 µVP-P noise and 0.0005%/mA load regulation enable sub-10 ppm output stability under dynamic load conditions. |
| Bridge Sensor Excitation | Calibrated Test Equipment |
|
Use Scenario: Wheatstone bridge excitation in strain-gauge load cells and pressure transducers used in industrial weighing. IC Role / Device Role / Timing Role: Stable 10V excitation source referenced to bridge common-mode point. Use Value: 0.0001%/V line regulation prevents output shift due to rail sag during motor startup events in factory automation. |
Use Scenario: Built-in reference for handheld multimeters, calibrators, and benchtop DMMs requiring traceable accuracy. IC Role / Device Role / Timing Role: Factory-trimmed primary reference against which all measurement ranges are calibrated. Use Value: Hermetic TO-5 package and 5 ppm/°C TC provide long-term stability needed for annual recalibration intervals without drift compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1019ACN8#PBF | 0.05% initial accuracy, 5 ppm/°C TC, pin-compatible 8-lead PDIP; higher cost, tighter spec | Used where ±0.05% absolute accuracy required (e.g., calibration lab standards) | Select when REF01EH's ±0.3% is insufficient but TO-5 packaging is not mandatory |
| REF01EN8#PBF | Same electrical specs, identical 0°C–70°C range, but in plastic DIP (N8) instead of TO-5 metal can | Preferred for cost-sensitive, non-hermetic applications with lower EMI/thermal stress | Choose for PCB space savings and RoHS-compliant assembly where hermeticity is unnecessary |
Compared with REF01EH, LT1019ACN8 offers superior accuracy at higher cost and different package, while REF01EN8 delivers identical performance in a lower-cost plastic DIP - enabling trade-offs between environmental robustness, board area, and system-level reliability requirements.
Availability
REF01EH is available at Aetrix Electronics and suitable for high-precision data acquisition, industrial sensor conditioning, and calibrated test equipment requiring stable component supply with long lifecycle visibility.
Supply support for REF01EH 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 ICs for precision measurement and control.
The REF-01 family was designed specifically for applications demanding low-drift, low-noise, and moderate-accuracy voltage references - bridging the gap between basic bandgaps and ultra-precision buried-zener solutions.
FAQ
What is the operating temperature range specified for REF01EH?
The REF01EH is rated for 0°C to 70°C operation, as confirmed by the order information table listing "REF01EH#PBF" with "0°C to 70°C" temperature range. This differs from the REF01AH#PBF variant, which supports –55°C to 125°C. The 0°C–70°C range is fully characterized for parameters including output voltage drift, line regulation, and noise performance.
Does REF01EH include a temperature output pin like REF-02 devices?
No, REF01EH does not include a temperature output pin. The datasheet explicitly states "DO NOT CONNECT ON REF-01" for Pin 3 (TEMP), and the REF-01/REF-02 functional description confirms that the temperature output feature is exclusive to REF-02 variants. REF01EH provides only the 10V reference output and trim functionality.
What is the maximum load current REF01EH can source while maintaining specification?
REF01EH is specified to maintain full accuracy up to 10 mA source current, as stated in the Electrical Characteristics table under "IOUT Load Current" (Sink Current column shows –0.3 mA, confirming sourcing capability). Performance remains within datasheet limits for line/load regulation and output voltage accuracy across this range when operated within its input voltage and thermal limits.
Can REF01EH be used with input voltages below 12 V?
No - the Absolute Maximum Ratings and Electrical Characteristics specify a minimum input voltage of 12 V for REF01EH. Operation below 12 V violates the guaranteed operating condition and may result in loss of regulation, increased drift, or failure to maintain 10 V output. A minimum 2 V headroom above nominal output is required for proper bandgap core biasing.
Is REF01EH pin-compatible with LT1019 series voltage references?
Yes, REF01EH is pin-compatible with LT1019 variants in the same package configuration. The datasheet's RELATED PARTS section explicitly states "Pin Compatible With the REF-01, REF-02, Improved Specs" for LT1019. However, note that LT1019 uses PDIP (N8) packaging by default, so mechanical compatibility requires matching the TO-5 (H) package variant if substituting directly on existing REF01EH footprints.
REF01EH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- TO-205-8, TO-5-8 Metal Can
- Series:
- REF01
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Reference Type:
- Series
- Output Type:
- -
- Voltage - Output (Min/Fixed):
- 10V
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Tolerance:
- ±0.3%
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-5
REF01EH FAQ
1.How can I place an order for REF01EH through Aetrix?
Please submit a Request for Quotation (RFQ) for REF01EH 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 REF01EH reliable?
The price and inventory of REF01EH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF01EH is usually 5 days.
3.What payment methods are accepted for REF01EH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF01EH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF01EH?
REF01EH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF01EH 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 REF01EH?
For technical support, including REF01EH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF01EH requirements.
6.How does Aetrix verify that REF01EH is sourced from the original manufacturer or authorized distributors?
All REF01EH 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 REF01EH meets industry standards.
7.What is the process for return or replacement of REF01EH?
All REF01EH units undergo pre-shipment inspection (PSI). If there is an issue with REF01EH, 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 REF01EH part is unused and in its original packaging.
Return procedure for REF01EH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF01EH Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
