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Analog Devices Inc. REF02CN8
- Part No.:
- REF02CN8
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
REF02CN8.pdf
- Description:
- IC VREF SERIES 1% 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,025
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Product details
Overview
REF02CN8 from Analog Devices (formerly Linear Technology) is a precision 5V bandgap voltage reference with temperature output functionality, ±0.3% initial accuracy, 8ppm/°C typical temperature coefficient over 0°C to 70°C, 1.4mA max quiescent current, and 12μVP-P (0.1Hz–10Hz) output noise - used in high-stability bridge excitation, precision DAC/ADC biasing, and constant-current source design.
For engineers reviewing the REF02CN8 datasheet, REF02CN8 pinout, REF02CN8 application, or REF02CN8 equivalent, key selection considerations include its integrated temperature-sensing voltage output (620mV at 25°C, +2.1mV/°C), trim-adjustable output (±2% range), low line/load regulation (0.0001%/V and 0.002%/mA), and N8-package thermal performance (θJA = 130°C/W).
Technical Context
The REF02CN8 implements a two-terminal bandgap reference core with buffered output and dedicated temperature-sensing terminal (Pin 3), enabling simultaneous precision voltage reference and absolute temperature monitoring without external components. Its internal trimming architecture supports ±2% output adjustment via external potentiometer on the TRIM pin.
Designed for operation from 7V to 40V input, it delivers up to 20mA sink/source capability while maintaining <0.01% load regulation across 0–8mA and <0.015%/V line regulation over full input range - critical for unregulated supply environments in industrial instrumentation and sensor signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.00V ±0.3% (4.985–5.015V) at 0mA load - ensures direct compatibility with 5V logic and ADC reference inputs without calibration. |
| Tempco (TC) | 8ppm/°C typical (0°C to 70°C) - guarantees ≤0.45% total output drift across commercial temperature range. |
| Temp Output (VT) | 620mV at 25°C, +2.1mV/°C - provides ratiometric temperature measurement with 1°C resolution using standard ADCs. |
| Quiescent Current | 1.4mA max - enables low-power operation in battery-backed or energy-constrained systems. |
| Noise (0.1–10Hz) | 12μVP-P - supports high-resolution (≥18-bit) data acquisition without added filtering. |
| Line Regulation | 0.0001%/V - minimizes output variation when powered from noisy or varying supplies (e.g., switcher outputs). |
| Load Regulation | 0.002%/mA (0–8mA) - maintains stability under dynamic load conditions in active filter or op-amp bias networks. |
Pinout & Package
REF02CN8 uses the N8 package: 8-lead plastic DIP (0.300" wide), through-hole mount, with θJA = 130°C/W and operating temperature range of 0°C to 70°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Internally unused - must remain unconnected per datasheet; no external tie required. |
| 2 (INPUT) | Reference Input | Accepts 7–40V unregulated supply; powers internal bandgap and output buffer. |
| 3 (TEMP) | Temperature Output | Provides linear 620mV @ 25°C, +2.1mV/°C voltage - requires ≤50nA load and ≤30pF capacitance. |
| 4 (GND) | Ground Reference | Common return for INPUT, OUTPUT, TEMP, and TRIM - must be low-impedance analog ground. |
| 5 (NC) | No Connect | Internally unused - must remain unconnected; floating or tied to GND degrades temp output accuracy. |
| 6 (NC) | No Connect | Internally unused - leave unconnected; not for decoupling or thermal relief. |
| 7 (OUTPUT) | Reference Output | 5V precision output capable of sourcing/sinking up to 20mA; low impedance (<1Ω) for driving op-amps or ADC refs. |
| 8 (TRIM) | Output Adjustment | Connects to center tap of 10kΩ potentiometer between OUTPUT and GND for ±2% fine-tuning of output voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated temperature sensing | Eliminates need for separate temperature sensor and signal conditioning in dual-function circuits (e.g., compensated strain gauge bridges). |
| Trim-adjustable output | Enables system-level calibration to compensate for PCB trace resistance, layout tolerances, or downstream gain errors. |
| Low-noise 5V reference | 12μVP-P (0.1–10Hz) supports high-fidelity analog front-ends in precision weighing, medical sensors, and metrology equipment. |
| High line/load regulation | 0.0001%/V and 0.002%/mA ensure stable reference under varying supply and load - essential for multi-channel data loggers. |
| Robust short-circuit protection | Indefinite short-to-ground or short-to-VIN ≤16V tolerance prevents latch-up or damage during test or fault conditions. |
Applications
| Bridge Excitation | Precision DAC Reference |
|---|---|
Use Scenario: Strain gauge Wheatstone bridge powered by stable excitation voltage in industrial load cells. IC Role / Device Role / Timing Role: Precision 5V excitation source with matched temperature tracking via TEMP pin. Use Value: Enables ratiometric measurement where bridge output and reference drift identically with temperature - eliminating thermal error terms. |
Use Scenario: Reference input for 16-bit+ DACs in programmable power supply control loops. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage reference ensuring monotonicity and integral nonlinearity <±1 LSB. Use Value: 12μVP-P noise and 8ppm/°C TC maintain DAC output accuracy across ambient temperature swings. |
| Constant-Current Source Bias | Trimmed ±5V Regulator Reference |
Use Scenario: Setting precise bias current for laser diodes or LED drivers in optical modules. IC Role / Device Role / Timing Role: Stable 5V reference feeding op-amp current-sense resistor network. Use Value: ±0.3% initial accuracy and 0.002%/mA load regulation ensure current setpoint remains within ±0.5% over full load range. |
Use Scenario: Reference for dual-op-amp ±5V precision regulator in analog test equipment. IC Role / Device Role / Timing Role: Master reference for both positive and negative LDO feedback paths. Use Value: TRIM pin allows factory calibration of both rails simultaneously, reducing BOM count and assembly cost. |
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 tempco, pin-compatible 8-lead SOIC; no temperature output pin. | Higher accuracy and lower drift, but lacks integrated temperature sensing - requires external sensor for thermal compensation. | Choose when absolute reference stability >10× tighter than REF02CN8 is required and temperature monitoring is handled separately. |
| REF02EN8#PBF | Same 5V output, ±0.3% accuracy, 8.5ppm/°C tempco, identical N8 package and pinout - only differs in temperature grade (E-grade: 0°C–70°C, same as C-grade). | No functional difference; E-grade and C-grade share identical electrical specs and packaging - C-grade is obsolete-marked but functionally equivalent. | Choose REF02EN8#PBF for new designs requiring currently active production status and full manufacturer support. |
Compared with REF02CN8, LT1019CS8#PBF offers superior accuracy and drift but removes temperature sensing, while REF02EN8#PBF provides identical performance with active lifecycle status - making it a drop-in replacement for continuity in volume production.
Availability
REF02CN8 is available at Aetrix Electronics and suitable for precision DAC/ADC reference, bridge excitation, and constant-current source applications requiring stable component supply across industrial and test equipment programs.
Supply support for REF02CN8 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 semiconductors.
The REF-01/REF-02 family was designed for cost-sensitive, high-stability analog systems needing both precision voltage reference and on-chip temperature telemetry - targeting industrial instrumentation, sensor interfaces, and calibration-critical equipment.
FAQ
What is the operating temperature range for REF02CN8?
The REF02CN8 is specified for 0°C to 70°C operation - this commercial-grade temperature range is confirmed in the order information table for all N8-package variants including REF02CN8#PBF. Its 8ppm/°C typical temperature coefficient applies across this full range, yielding ≤0.45% total output variation. The device is not rated for extended industrial or automotive temperatures.
Does REF02CN8 provide a temperature output, and how is it used?
Yes, REF02CN8 provides a dedicated temperature output on Pin 3 (TEMP), delivering 620mV at 25°C with a linear +2.1mV/°C slope. This output must be loaded with ≤50nA and capacitance ≤30pF to maintain accuracy. It enables direct ratiometric temperature measurement in bridge circuits or system thermal monitoring without external sensors - a key differentiator from standard references like REF02EN8#PBF.
Can REF02CN8 be adjusted, and what is the adjustment range?
Yes, REF02CN8 supports output voltage trimming via Pin 8 (TRIM), which connects to the wiper of a 10kΩ potentiometer between OUTPUT and GND. This provides ±2% adjustment range (4.9–5.1V), allowing system-level calibration to compensate for PCB losses, op-amp offsets, or downstream gain errors - a feature confirmed in the Electrical Characteristics table for REF-02C grade.
What is the maximum load current REF02CN8 can drive?
REF02CN8 can source or sink up to 20mA while maintaining specification compliance, with guaranteed load regulation of 0.002%/mA from 0–8mA. Short-circuit current is 25mA, and indefinite short-to-ground is permitted. For sustained 20mA loads, thermal derating must be applied given its N8 package θJA = 130°C/W and TJMAX = 100°C.
Is REF02CN8 pin-compatible with other REF-02 variants?
Yes, REF02CN8 shares identical N8-package pinout and electrical interface with all other REF-02 N8 variants (e.g., REF02EN8#PBF, REF02HN8#PBF), including INPUT, OUTPUT, TEMP, TRIM, GND, and NC pins in the same positions. This allows direct substitution in existing layouts - though temperature grade (C vs. E vs. H) and long-term availability should be verified per application requirements.
REF02CN8 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:
- ±1%
- Temperature Coefficient:
- 65ppm/°C
- Noise - 0.1Hz to 10Hz:
- 12µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 8V ~ 33V
- Current - Supply:
- 1.6mA
- Current - Cathode:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
REF02CN8 FAQ
1.How can I place an order for REF02CN8 through Aetrix?
Please submit a Request for Quotation (RFQ) for REF02CN8 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 REF02CN8 reliable?
The price and inventory of REF02CN8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF02CN8 is usually 5 days.
3.What payment methods are accepted for REF02CN8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF02CN8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF02CN8?
REF02CN8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF02CN8 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 REF02CN8?
For technical support, including REF02CN8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF02CN8 requirements.
6.How does Aetrix verify that REF02CN8 is sourced from the original manufacturer or authorized distributors?
All REF02CN8 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 REF02CN8 meets industry standards.
7.What is the process for return or replacement of REF02CN8?
All REF02CN8 units undergo pre-shipment inspection (PSI). If there is an issue with REF02CN8, 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 REF02CN8 part is unused and in its original packaging.
Return procedure for REF02CN8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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