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Analog Devices Inc. REF02CSZ
- Part No.:
- REF02CSZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
REF02CSZ.pdf
- Description:
- IC VREF SERIES 1% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:954
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Product details
Overview
REF02CSZ 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, industrial sensor signal conditioning, and calibration-critical instrumentation circuits.
For engineers reviewing the REF02CSZ datasheet, REF02CSZ pinout, REF02CSZ application, or REF02CSZ equivalent, key selection criteria include output stability under varying load (≤100 ppm/mA), wide 7.0–36 V input range, integrated temperature-sensing capability (580 mV @ 25°C, 1.96 mV/°C), and trim-adjustable output (±3% min).
Technical Context
The REF02CSZ implements a laser-trimmed bandgap core with internal op-amp feedback to deliver stable 5.0 V output across −40°C to +85°C. Its TEMP pin provides direct access to the unbuffered PTAT voltage for external temperature monitoring without additional components.
It features a dedicated TRIM terminal enabling fine output adjustment via external resistor network, and supports up to 10 mA sourcing load current while maintaining <2 V dropout at full load - all within an 8-lead SOIC package optimized for board space and thermal performance (θJA = 130°C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000 V nominal; A-grade devices guaranteed 4.985–5.015 V at 25°C - enables direct interface with 5 V logic and mid-scale ADC references. |
| Initial Accuracy | ±0.3% (±15 mV) for A/E grades - eliminates need for system-level calibration in moderate-precision applications. |
| Temp Coefficient | Max 8.5 ppm/°C over −55°C to +125°C - ensures ≤±0.43 mV drift across full industrial range (−40°C to +85°C). |
| Voltage Noise | 15 µVp-p (0.1–10 Hz) - preserves ENOB in 16-bit+ SAR and delta-sigma converters. |
| Supply Range | 7.0 V to 36 V - accommodates unregulated 12 V/24 V rails and battery-backed systems without pre-regulation. |
| Load Drive | 10 mA sourcing capability - directly drives ADC reference inputs, op-amp bias networks, and small DACs. |
| Quiescent Current | 1.4 mA max - balances low-power operation with fast turn-on settling (5 µs to ±0.1%). |
Pinout & Package
REF02CSZ is housed in an 8-lead SOIC (S-suffix) package with exposed pad thermal enhancement. Pin 1 is NC (no internal connection); pins 7 and 8 are also NC. GND (Pin 4) serves as both circuit ground and thermal reference plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8 | NC | No internal connection; must remain floating or tied to GND per layout guidelines - not for routing or decoupling. |
| 2 | VIN | Main supply input; accepts 7–36 V; requires local 0.1 µF ceramic capacitor for stability and noise rejection. |
| 3 | TEMP | Unbuffered bandgap voltage output (580 mV @ 25°C, 1.96 mV/°C); used for on-chip temperature sensing or compensation. |
| 4 | GND | Analog ground return and thermal path; must be connected to low-impedance ground plane for optimal noise and thermal performance. |
| 5 | TRIM | Adjustment node for external potentiometer (10 kΩ typical); enables ±3% output tuning to compensate for system-level errors. |
| 6 | VOUT | Stable 5.0 V reference output; capable of sourcing up to 10 mA; requires 0.1 µF ceramic capacitor for low-noise operation. |
Key Features
| Feature | Design Value |
|---|---|
| High-output accuracy | ±0.3% initial tolerance (A-grade) - reduces calibration overhead in automated test equipment and portable instruments. |
| Low temperature drift | 8.5 ppm/°C max over −55°C to +125°C - maintains sub-millivolt stability in outdoor or factory-floor environments. |
| Integrated temperature sensing | Direct TEMP pin output (580 mV @ 25°C, ±1.96 mV/°C) - enables self-calibrating systems without external sensors or ADC channels. |
| Trim-adjustable output | ±3% minimum adjustment range via external potentiometer - compensates for PCB trace resistance, solder reflow shift, and long-term aging. |
| Wide supply voltage range | Operates from 7.0 V to 36 V - supports direct connection to industrial 24 V rails and legacy power supplies without LDO pre-regulation. |
Applications
| High-Resolution Data Acquisition | Industrial Process Transmitters |
|---|---|
Use Scenario: 18-bit SAR ADC front-end in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion reference rail and sensor excitation bias. Use Value: 15 µVp-p low-frequency noise and 8.5 ppm/°C drift ensure <0.005% total error over temperature - meeting IEC 61000-6-2 immunity requirements. |
Use Scenario: 4–20 mA loop-powered pressure transmitter with onboard microcontroller and HART modulation. IC Role / Device Role / Timing Role: Stable 5.0 V supply for MCU, ADC, and DAC; TEMP pin used for cold-junction compensation of RTD inputs. Use Value: 10 mA drive capability powers entire signal chain; TRIM pin allows field recalibration without hardware change. |
| Precision Calibration Equipment | Aerospace Sensor Signal Conditioning |
Use Scenario: Benchtop multimeter reference subsystem requiring traceable 5.0 V source with <10 ppm/year long-term stability. IC Role / Device Role / Timing Role: Master reference for internal DAC-based voltage generation and self-test calibration routines. Use Value: 50 ppm long-term stability after 1000 hours and ±0.3% initial accuracy meet ANSI/NCSL Z540-1 metrology standards. |
Use Scenario: Avionics-grade inertial measurement unit (IMU) with MEMS gyros and accelerometers. IC Role / Device Role / Timing Role: Low-noise reference for sigma-delta ADCs digitizing gyro bias outputs; TEMP pin monitors die temperature for real-time drift correction. Use Value: 5 µs turn-on settling and 15 µVp-p noise prevent transient-induced measurement artifacts during aircraft power-up sequences. |
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 | Higher initial accuracy (±0.1%), lower tempco (3 ppm/°C), same 5.0 V output and SOIC-8 package. | Better suited for metrology-grade systems where long-term stability and ultra-low drift dominate cost sensitivity. | Select ADR02ARZ when ±0.1% accuracy and <3 ppm/°C drift are mandatory; REF02CSZ remains optimal for cost-sensitive industrial designs requiring proven reliability. |
| LT1021DCN8-5 | Lower quiescent current (0.8 mA), higher noise (25 µVp-p), same 5 V output and 8-pin DIP package (not SOIC). | Preferred in legacy military/aerospace designs with existing DIP footprints and strict power budget constraints. | Choose LT1021DCN8-5 only if DIP-8 mechanical compatibility or sub-1 mA supply current is required; REF02CSZ offers superior noise and SOIC footprint. |
Compared with ADR02ARZ and LT1021DCN8-5, REF02CSZ delivers the best balance of industrial-grade accuracy (±0.3%), ultra-low noise (15 µVp-p), and SOIC-8 manufacturability - making it ideal for volume production of test equipment and process control hardware where cost, noise, and ease of assembly are jointly critical.
Availability
REF02CSZ is available at Aetrix Electronics and suitable for precision data acquisition, industrial process transmitters, and aerospace sensor signal conditioning requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for REF02CSZ 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 industrial, communications, automotive, and defense markets since 1965.
The REF02CSZ belongs to Analog Devices' precision voltage reference product line, engineered specifically for applications demanding low drift, low noise, and robust thermal performance in harsh operating environments.
FAQ
What is the maximum load current supported by the REF02CSZ?
The REF02CSZ can source up to 10 mA while maintaining specified output accuracy and regulation. This capability allows direct driving of ADC reference inputs, op-amp bias networks, and small-signal DACs without external buffers. Sinking capability is limited to −0.3 mA. Exceeding 10 mA may degrade line/load regulation and increase output drift.
Does the REF02CSZ require external capacitors for stable operation?
Yes - a 0.1 µF ceramic capacitor is highly recommended at the VOUT pin to suppress low-frequency noise and improve stability. An additional 1–10 µF bulk capacitor (tantalum or ceramic) may be added in parallel for improved transient response. A 0.1 µF ceramic capacitor is also advised at VIN to reduce supply noise. All capacitors must be placed as close as possible to their respective pins.
How is the TEMP pin used in the REF02CSZ?
The TEMP pin provides direct access to the unbuffered bandgap voltage (580 mV at 25°C) with a linear temperature coefficient of 1.96 mV/°C. It enables on-chip temperature monitoring for drift compensation, thermal protection, or cold-junction correction in RTD or thermocouple systems - no external sensor or amplifier is needed.
Can the output voltage of the REF02CSZ be adjusted, and how?
Yes - the TRIM pin supports external adjustment using a 10 kΩ potentiometer in the configuration shown in Figure 35 of the datasheet. This allows ±3% minimum output tuning (4.95–5.02 V for A-grade units) to compensate for system-level errors including PCB trace resistance, solder reflow shift, and long-term aging effects.
What is the operating temperature range for the REF02CSZ part number?
The REF02CSZ is rated for operation from −40°C to +85°C, consistent with its "C" grade industrial temperature specification and SOIC-8 (S-suffix) package. This range covers standard industrial, commercial, and many transportation applications - though extended-range variants (e.g., REF02AZ) support −55°C to +125°C.
REF02CSZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- REF02
- Packaging:
- Tube
- Product Status:
- Active
- 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
REF02CSZ FAQ
1.How can I place an order for REF02CSZ through Aetrix?
Please submit a Request for Quotation (RFQ) for REF02CSZ 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 REF02CSZ reliable?
The price and inventory of REF02CSZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF02CSZ is usually 5 days.
3.What payment methods are accepted for REF02CSZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF02CSZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF02CSZ?
REF02CSZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF02CSZ 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 REF02CSZ?
For technical support, including REF02CSZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF02CSZ requirements.
6.How does Aetrix verify that REF02CSZ is sourced from the original manufacturer or authorized distributors?
All REF02CSZ 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 REF02CSZ meets industry standards.
7.What is the process for return or replacement of REF02CSZ?
All REF02CSZ units undergo pre-shipment inspection (PSI). If there is an issue with REF02CSZ, 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 REF02CSZ part is unused and in its original packaging.
Return procedure for REF02CSZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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