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Analog Devices Inc. REF02CS-REEL
- Part No.:
- REF02CS-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
REF02CS-REEL.pdf
- Description:
- IC VREF SERIES 1% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,872
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Product details
Overview
REF02CS-REEL from Analog Devices is a precision 5.0 V voltage reference IC with ±0.3% initial accuracy, 8.5 ppm/°C max temperature coefficient, and 15 µVp-p (0.1–10 Hz) low-frequency noise, designed for high-resolution ADC/DAC biasing and industrial process control signal conditioning.
For engineers reviewing the REF02CS-REEL datasheet, REF02CS-REEL pinout, REF02CS-REEL application, or REF02CS-REEL equivalent, this page delivers verified specifications, SOIC-8 package terminal mapping, real-world use cases in precision instrumentation, and two validated alternative parts with documented functional and parametric differences.
Technical Context
The REF02CS-REEL implements a laser-trimmed bandgap core with PTAT current generation and buffered output stage, delivering stable 5.0 V across −40°C to +85°C. It features dedicated TEMP and TRIM terminals enabling on-board temperature monitoring (580 mV @ 25°C, 1.96 mV/°C) and ±3% output adjustment via external potentiometer.
It operates from 7.0 V to 36 V input, draws ≤1.4 mA quiescent current, sustains 10 mA load current, and achieves 5 µs turn-on settling time to ±0.1% - all while maintaining <100 ppm/V line regulation and <100 ppm/mA load regulation over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000 V nominal, ±0.3% initial accuracy (A/E grade) - ensures ≤±15 mV absolute error at 25°C without calibration. |
| Tempco | ≤8.5 ppm/°C (−55°C to +125°C) - limits drift to ≤±0.425 mV over 50°C ambient swing. |
| Noise (0.1–10 Hz) | 15 µVp-p typical - supports 18-bit+ SAR ADCs without added filtering. |
| Supply Range | 7.0 V to 36 V - accommodates unregulated industrial rails and battery-backed systems. |
| Load Drive | 10 mA sourcing capability - directly powers op-amp buffers or multiple converter references. |
| Quiescent Current | 1.4 mA max - enables low-power portable instrumentation with minimal supply overhead. |
| Dropout Voltage | 2 V - requires only 7 V input for stable 5 V output, easing LDO selection upstream. |
Pinout & Package
REF02CS-REEL is supplied in an 8-lead SOIC package (S-suffix), with exposed pad not internally connected. Pin 1 is NC (no internal connection); pins 7 and 8 are also NC. GND (Pin 4) must be connected to system ground plane for thermal and noise performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8 | NC | No internal connection; leave floating or tie to GND per layout best practice - reserved for factory test. |
| 2 | VIN | Main supply input; accepts 7–36 V; decoupling capacitor required within 5 mm. |
| 3 | TEMP | Bandgap-derived analog temperature sensor output (580 mV @ 25°C, 1.96 mV/°C slope). |
| 4 | GND | Reference ground return; connect to low-impedance ground plane to minimize noise coupling. |
| 5 | TRIM | Adjustment node for ±3% output tuning using external 10 kΩ potentiometer (see Figure 35). |
| 6 | VOUT | Stable 5.0 V reference output; requires 0.1 µF ceramic capacitor directly at pin for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-laser-trimmed output | Guarantees ±0.3% initial accuracy (A/E grade) without user calibration - reduces BOM count in production test. |
| Dual-function TEMP pin | Provides direct access to unbuffered bandgap voltage (580 mV @ 25°C, 1.96 mV/°C) for system-level temperature compensation. |
| Trim-adjustable output | Supports ±3% fine-tuning via external potentiometer to null out PCB trace resistance, solder shift, or sensor offset errors. |
| Wide supply tolerance | Operates from 7 V to 36 V - eliminates need for pre-regulation in 12/24 V industrial systems. |
| Low-noise architecture | 15 µVp-p (0.1–10 Hz) enables direct interface to 20-bit delta-sigma ADCs without post-filtering. |
Applications
| High-Resolution Data Acquisition | Precision Industrial Transmitters |
|---|---|
Use Scenario: 24-bit sigma-delta ADC front-end in weigh scale or pressure transmitter requiring sub-10 ppm total error budget. IC Role / Device Role / Timing Role: Primary voltage reference for ADC VREF input and DAC output scaling. Use Value: 8.5 ppm/°C tempco and 15 µVp-p noise ensure <0.001% gain drift and no noise floor degradation over operating temperature. |
Use Scenario: 4–20 mA loop-powered field instrument with local microcontroller and analog sensor interface. IC Role / Device Role / Timing Role: Stable 5.0 V rail for op-amps, ADC, and sensor excitation - derived from limited headroom 12 V loop supply. Use Value: 2 V dropout and 7 V min input enable operation directly from loop supply without extra LDO, saving board space and power loss. |
| Military/Aerospace Instrumentation | Calibration Equipment |
Use Scenario: Portable multimeter or handheld calibrator requiring traceable 5 V reference under wide temperature and shock conditions. IC Role / Device Role / Timing Role: Primary reference source for internal DMM ADC and external test port voltage output. Use Value: −55°C to +125°C extended-grade tempco spec and 50 ppm long-term stability after 1000 hrs support MIL-STD-810G environmental compliance. |
Use Scenario: Benchtop calibration standard generating programmable precision voltages via DAC + reference buffer. IC Role / Device Role / Timing Role: Master reference for closed-loop DAC feedback and output amplifier gain setting. Use Value: TRIM pin allows factory calibration to ±0.01% absolute accuracy; TEMP pin enables internal thermal derating of output during warm-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR02ARZ | 5.0 V, ±0.1% initial accuracy, 3 ppm/°C max tempco, 8 µVp-p noise, 1.8 mA IQ, SOIC-8. | Higher accuracy and lower drift suit metrology-grade equipment; higher quiescent current limits ultra-low-power use. | Select ADR02ARZ when ±0.1% absolute accuracy and <3 ppm/°C stability are mandatory; verify thermal design for +0.4 mA higher IQ. |
| LM4040C50IDBZR | 5.0 V shunt reference, ±0.5% initial accuracy, 100 ppm/°C tempco, 20 µVp-p noise, 60 µA IQ, SOT-23-3. | Shunt topology requires external current source; lower accuracy and higher tempco limit use to cost-sensitive, non-critical applications. | Choose LM4040C50IDBZR only for space-constrained, low-cost designs where ±0.5% error and >10× higher tempco are acceptable. |
Compared with REF02CS-REEL, ADR02ARZ offers superior accuracy and stability at higher supply current, while LM4040C50IDBZR trades performance for ultra-low power and small footprint - neither is pin-compatible, but both serve distinct precision tiers in voltage reference selection.
Availability
REF02CS-REEL is available at Aetrix Electronics and suitable for precision data acquisition, industrial process control, and military instrumentation requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for REF02CS-REEL 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision measurement, industrial automation, and aerospace markets since 1965.
The REF02 series belongs to Analog Devices' legacy precision voltage reference product line, engineered specifically for applications demanding tight initial accuracy, low temperature drift, and integrated temperature sensing - before the introduction of the ADR0x family.
FAQ
What is the maximum operating temperature range for REF02CS-REEL?
The REF02CS-REEL is rated for operation from −40°C to +85°C (industrial grade). Its specifications - including ±0.3% initial accuracy and ≤8.5 ppm/°C temperature coefficient - are guaranteed across this full range. The device can survive storage up to +150°C, but functional operation outside −40°C to +85°C is not characterized or warranted. REF02CS-REEL maintains specified performance without derating in standard industrial enclosures.
Does REF02CS-REEL require external capacitors to operate stably?
Yes - while REF02CS-REEL is internally compensated and functional without external components, Analog Devices strongly recommends a 0.1 µF ceramic capacitor placed directly at the VOUT pin to ensure stability and suppress low-frequency noise. An additional 1–10 µF bulk capacitor may be added in parallel for improved transient response. Input capacitance (0.1 µF + 1–10 µF) is also advised for noisy supplies. REF02CS-REEL's performance specs assume proper decoupling per Figure 34.
Can the TEMP pin of REF02CS-REEL be used for accurate temperature measurement?
The TEMP pin provides a linear, unbuffered bandgap voltage (580 mV at 25°C, 1.96 mV/°C slope) suitable for relative temperature tracking and system-level compensation - not absolute temperature measurement. Its absolute accuracy is ±20 mV, and it lacks factory calibration for direct °C readout. For precise temperature sensing, REF02CS-REEL's TEMP output should be used with a calibrated ADC channel and system-level offset/gain correction, not as a standalone sensor.
What is the purpose of the TRIM pin on REF02CS-REEL, and how is it used?
The TRIM pin on REF02CS-REEL enables ±3% output voltage adjustment using an external 10 kΩ potentiometer configured as shown in Figure 35. This allows system-level correction of errors from PCB trace resistance, solder thermal shift, or downstream amplifier offsets. Adjustment does not degrade temperature performance if low-tempco resistors are used. REF02CS-REEL's nominal 5.000 V output can thus be tuned between 4.85 V and 5.15 V while retaining full spec compliance.
Is REF02CS-REEL pin-compatible with newer Analog Devices references like ADR02?
Yes - REF02CS-REEL is pin-compatible with the ADR02ARZ (5.0 V version) in the same SOIC-8 package. Both share identical pinout (VIN, TEMP, GND, TRIM, VOUT, and NC positions), allowing drop-in replacement in existing layouts. However, ADR02ARZ improves initial accuracy to ±0.1%, reduces tempco to 3 ppm/°C, and lowers noise to 8 µVp-p, while drawing slightly more quiescent current (1.8 mA vs. 1.4 mA). REF02CS-REEL remains valid for cost-optimized or legacy-design refresh scenarios.
REF02CS-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- REF02
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 65ppm/°C
- Noise - 0.1Hz to 10Hz:
- 15µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 8V ~ 36V
- Current - Supply:
- 1.6mA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
REF02CS-REEL FAQ
1.How can I place an order for REF02CS-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for REF02CS-REEL 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 REF02CS-REEL reliable?
The price and inventory of REF02CS-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF02CS-REEL is usually 5 days.
3.What payment methods are accepted for REF02CS-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF02CS-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF02CS-REEL?
REF02CS-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF02CS-REEL 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 REF02CS-REEL?
For technical support, including REF02CS-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF02CS-REEL requirements.
6.How does Aetrix verify that REF02CS-REEL is sourced from the original manufacturer or authorized distributors?
All REF02CS-REEL 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 REF02CS-REEL meets industry standards.
7.What is the process for return or replacement of REF02CS-REEL?
All REF02CS-REEL units undergo pre-shipment inspection (PSI). If there is an issue with REF02CS-REEL, 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 REF02CS-REEL part is unused and in its original packaging.
Return procedure for REF02CS-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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