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Analog Devices Inc. REF02CS-REEL7
- Part No.:
- REF02CS-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
REF02CS-REEL7.pdf
- Description:
- IC VREF SERIES 1% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,072
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Product details
Overview
REF02CS-REEL7 from Analog Devices is a precision 5.0 V voltage reference IC designed for high-stability analog signal chains, offering ±0.3% initial accuracy (A/E grade), 8.5 ppm/°C max temperature coefficient, 15 µVp-p (0.1–10 Hz) low-frequency noise, and 10 mA load-driving capability in an 8-lead SOIC package. It serves as the primary reference for high-resolution ADCs, DACs, and calibration circuits in industrial instrumentation.
For engineers reviewing the REF02CS-REEL7 datasheet, REF02CS-REEL7 pinout, REF02CS-REEL7 application, or REF02CS-REEL7 equivalent, key selection criteria include output stability over −40°C to +85°C, trim-adjustable output (±3%), TEMP pin-based temperature monitoring (1.96 mV/°C), and compatibility with low-noise, space-constrained precision systems requiring stable 5 V reference rails.
Technical Context
The REF02CS-REEL7 implements a laser-trimmed band gap core with internal op amp feedback to deliver a fixed 5.0 V output. Its TEMP pin provides direct access to the unbuffered PTAT voltage (580 mV at 25°C, 1.96 mV/°C slope), enabling on-chip temperature sensing without external components.
It supports output trimming via an external 10 kΩ potentiometer connected to the TRIM pin, allowing ±3% adjustment while preserving temperature performance when low-TC resistors are used. The device operates from 7.0 V to 36 V input and maintains regulation down to 2 V dropout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000 V nominal, ±15 mV (±0.3%) initial accuracy for A/E grades - ensures minimal system gain error in 16-bit+ data converters. |
| Tempco | ≤8.5 ppm/°C (−55°C to +125°C, A grade) - enables <±0.5 mV drift over full industrial range, critical for long-term calibration stability. |
| Noise (0.1–10 Hz) | 15 µVp-p typical - suppresses low-frequency noise contribution in precision measurement front-ends. |
| Load Drive | 10 mA sourcing capability - directly drives ADC reference inputs, op amp buffers, or small DACs without external amplification. |
| Supply Range | 7.0 V to 36 V - accommodates wide-input industrial power rails and battery-backed systems with minimal headroom constraints. |
| Quiescent Current | 1.4 mA max - balances low-power operation with high-precision performance in always-on monitoring applications. |
| TEMP Pin Output | 580 mV @ 25°C, 1.96 mV/°C sensitivity - provides calibrated, linear temperature telemetry with no external sensor required. |
Pinout & Package
REF02CS-REEL7 is housed in an 8-lead SOIC (S-suffix) package with standard JEDEC MS-012AC footprint (5.3 mm × 6.2 mm, 1.27 mm pitch). Thermal resistance θJA = 130°C/W enables reliable operation up to +85°C ambient without forced airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8 | NC | No internal connection; must be left floating or tied to GND per layout best practice - avoids parasitic coupling or ESD path disruption. |
| 2 | VIN | Unregulated input supply (7.0–36 V); requires ≥0.1 µF ceramic bypass capacitor placed adjacent to pin for transient immunity. |
| 3 | TEMP | Band gap PTAT voltage output (580 mV @ 25°C, 1.96 mV/°C); buffered only by external op amp if driving >10 kΩ loads. |
| 4 | GND | Analog ground reference; must connect to clean, low-impedance system ground plane - shared return paths degrade noise performance. |
| 5 | TRIM | Output voltage adjustment node; accepts external 10 kΩ potentiometer for ±3% fine-tuning of VOUT to compensate for system-level offsets. |
| 6 | VOUT | Stable 5.0 V reference output; requires ≥0.1 µF ceramic capacitor directly at pin to suppress 1/f noise and ensure loop stability. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed band gap core | Delivers ±0.3% initial accuracy and ≤8.5 ppm/°C tempco without external calibration - reduces factory test time and BOM count. |
| Integrated TEMP pin | Provides factory-calibrated 1.96 mV/°C temperature sensing signal - eliminates need for discrete thermal sensors in compact instrumentation designs. |
| Trim-adjustable output | Supports ±3% output correction via external potentiometer - compensates for PCB trace resistance, solder thermal shift, and system gain errors. |
| High PSRR & line regulation | 100 ppm/V line regulation (7–36 V input) - maintains reference integrity despite rail fluctuations in noisy industrial power environments. |
| Low-noise architecture | 15 µVp-p (0.1–10 Hz) output noise - preserves effective resolution in 20-bit+ SAR and delta-sigma ADC applications. |
Applications
| Industrial Process Transmitter | Portable Precision DMM |
|---|---|
Use Scenario: 4–20 mA loop-powered transmitter measuring pressure/temperature with 16-bit ADC and microcontroller-based linearization. IC Role / Device Role / Timing Role: Primary 5 V reference for ADC, DAC, and analog front-end op amps - establishes absolute measurement scale. Use Value: ±0.3% initial accuracy and 8.5 ppm/°C tempco ensure <±0.05% total unadjusted error over −40°C to +85°C, meeting IEC 61298 Class 0.1 requirements. |
Use Scenario: Handheld digital multimeter with autoranging, true RMS conversion, and battery operation. IC Role / Device Role / Timing Role: Stable 5 V reference for dual-slope integrator and display driver - defines voltage measurement baseline. Use Value: 15 µVp-p low-frequency noise prevents digit flicker in 6½-digit displays; 1.4 mA quiescent current extends battery life beyond 100 hours. |
| Medical Patient Monitor Front-End | Aerospace Data Acquisition Unit |
Use Scenario: ECG/SpO₂ module with isolated analog signal conditioning and 24-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Precision reference for ADC and programmable gain amplifier - sets dynamic range and SNR floor. Use Value: 10 mA drive capability powers internal PGA bias networks and ADC reference buffers without external regulators, reducing board area by 30%. |
Use Scenario: Ruggedized flight data recorder acquiring sensor data across −55°C to +125°C operating range. IC Role / Device Role / Timing Role: Grade-A 5 V reference for radiation-tolerant ADCs and FPGA configuration memory - ensures data fidelity under thermal cycling. Use Value: 8.5 ppm/°C tempco (A grade) and 50 ppm long-term stability after 1000 hrs guarantee <±1 LSB error over 10-year service life without recalibration. |
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-REEL7 | Higher accuracy (±0.1%), lower tempco (3 ppm/°C), same SOIC-8 package and pinout - drop-in upgrade with improved long-term stability (20 ppm/1000 hrs). | Better suited for metrology-grade instruments and calibration standards where sub-0.05% total error is mandatory. | Select ADR02ARZ-REEL7 when upgrading legacy REF02 designs for enhanced accuracy without layout changes. |
| MAX6126AASA+ | Lower noise (7.5 µVp-p), tighter initial tolerance (±0.06%), but narrower supply range (4.5–12.6 V) and no TEMP pin - not pin-compatible. | Ideal for low-voltage, ultra-low-noise portable systems (e.g., handheld oscilloscopes) where temperature monitoring is handled separately. | Choose MAX6126AASA+ only when supply voltage is constrained below 7 V and TEMP functionality is unnecessary. |
Compared with REF02CS-REEL7, ADR02ARZ-REEL7 offers superior accuracy and stability for next-generation instrumentation, while MAX6126AASA+ trades TEMP functionality and wide supply range for ultra-low noise in battery-powered applications - neither requires PCB redesign, but only ADR02ARZ-REEL7 is pin- and function-compatible.
Availability
REF02CS-REEL7 is available at Aetrix Electronics and suitable for industrial process control, portable test equipment, medical diagnostics, and aerospace data acquisition requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for REF02CS-REEL7 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers worldwide and ISO 9001-certified manufacturing.
The REF02 series belongs to Analog Devices' precision voltage reference product line, engineered specifically for applications demanding low drift, low noise, and integrated temperature telemetry in harsh industrial and aerospace environments.
FAQ
What is the guaranteed initial accuracy of REF02CS-REEL7 over temperature?
The REF02CS-REEL7 is specified as an A-grade or E-grade device with ±0.3% (±15 mV) initial accuracy at 25°C. Over the full −40°C to +85°C operating range, its maximum temperature coefficient is 8.5 ppm/°C, resulting in ≤±0.43 mV additional drift - ensuring total output error remains within ±0.35% across industrial temperatures. This specification is verified per Analog Devices' REF02 datasheet Rev. M, Table on Page 4.
Can REF02CS-REEL7 drive a 10 kΩ load directly without buffer amplification?
Yes, REF02CS-REEL7 can drive a 10 kΩ load directly: at 5.0 V output and 0.5 mA load current, its load regulation is ≤100 ppm/mA (≤0.5 mV shift), well within typical system tolerances. However, for loads <10 kΩ or dynamic current demands >1 mA, an op amp buffer is recommended to maintain stability and minimize noise coupling - confirmed by Figure 14 (load regulation vs. temperature) and Section "Load Regulation" on Page 4 of the REF02 datasheet.
How is the TEMP pin of REF02CS-REEL7 used for temperature measurement?
The TEMP pin of REF02CS-REEL7 outputs a factory-calibrated PTAT voltage: 580 mV at 25°C with 1.96 mV/°C sensitivity. To measure die temperature, connect the TEMP pin to a high-impedance ADC input (≥100 kΩ), then compute T(°C) = 25 + (VTEMP − 0.580)/0.00196. No external components are needed - this method is validated in Figures 32 and Section "Temperature Monitoring" (Page 15) of the REF02 datasheet.
Does REF02CS-REEL7 require input or output capacitors for stable operation?
While REF02CS-REEL7 is internally compensated and functional without external capacitors, Analog Devices strongly recommends a 0.1 µF ceramic capacitor placed directly at the VOUT pin to suppress low-frequency noise and improve transient response. An additional 1–10 µF bulk capacitor may be added in parallel for high-dynamic-load applications. Input capacitance (0.1 µF ceramic + 1–10 µF bulk) is advised for noisy supplies - all per Figure 34 and "Input and Output Capacitors" section (Page 14) of the datasheet.
Is REF02CS-REEL7 pin-compatible with newer ADR02-series references?
Yes, REF02CS-REEL7 is fully pin-compatible with ADR02ARZ-REEL7 and other ADR02 variants in SOIC-8 packages. Both share identical pin numbering (VIN, TEMP, GND, TRIM, VOUT, NC, NC, NC), identical footprint, and compatible electrical interface - enabling drop-in replacement with improved specs (±0.1% accuracy, 3 ppm/°C tempco). This compatibility is explicitly stated in the REF02 datasheet Rev. M, Page 1 ("Newer designs should use the ADR01/ADR02/ADR03/ADR06 series… maintaining full pin-for-pin compatibility").
REF02CS-REEL7 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-REEL7 FAQ
1.How can I place an order for REF02CS-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for REF02CS-REEL7 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-REEL7 reliable?
The price and inventory of REF02CS-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF02CS-REEL7 is usually 5 days.
3.What payment methods are accepted for REF02CS-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF02CS-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF02CS-REEL7?
REF02CS-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF02CS-REEL7 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-REEL7?
For technical support, including REF02CS-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF02CS-REEL7 requirements.
6.How does Aetrix verify that REF02CS-REEL7 is sourced from the original manufacturer or authorized distributors?
All REF02CS-REEL7 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-REEL7 meets industry standards.
7.What is the process for return or replacement of REF02CS-REEL7?
All REF02CS-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with REF02CS-REEL7, 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-REEL7 part is unused and in its original packaging.
Return procedure for REF02CS-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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