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Analog Devices Inc./Maxim Integrated REF02DSA
- Part No.:
- REF02DSA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
REF02DSA.pdf
- Description:
- 5V VOLTAGE REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:3,796
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Product details
Overview
REF02DSA from Maxim Integrated is a precision 5V voltage reference IC with integrated linear temperature transducer output (TEMP pin), ±25mV initial accuracy, 25ppm/°C max temperature coefficient, and 8-pin SO package. It operates from 7V to 33V input, delivers up to 21mA load current, and supports system calibration and remote temperature sensing in industrial data acquisition systems.
For engineers reviewing the REF02DSA datasheet, REF02DSA pinout, REF02DSA application, or REF02DSA equivalent, key selection criteria include its 5V output stability over 0°C to +70°C, TEMP pin linearity (2.1mV/°C), low 15µVP-P noise (0.1Hz–10Hz), and trim-adjustable range (±6% of 5V) without degrading thermal performance.
Technical Context
The REF02DSA implements a bandgap-based reference core with buffered 5V output and a dedicated TEMP pin that provides a voltage proportional to absolute temperature (630mV at 0°C, +2.1mV/°C). Its trim terminal allows ±300mV adjustment via external 10kΩ potentiometer while maintaining ≤0.7ppm/°C/100mV change in temperature coefficient.
Designed for single-supply operation, it features short-circuit protection, 1mA quiescent current, and stable performance across 0°C to +70°C ambient - verified per REF02HSA electrical characteristics tables. The TEMP pin requires ≤50nA load and ≤30pF capacitance to preserve linearity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.975V to 5.025V at 25°C (±0.5% tolerance; enables high-accuracy ADC/DAC biasing) |
| Tempco (Max) | 25ppm/°C over 0°C to +70°C (ensures ≤0.07% output drift across full operating range) |
| Initial Accuracy | ±25mV (±0.5% of 5V) at 25°C (supports factory calibration without post-trim) |
| Output Noise | 15µVP-P, 0.1Hz–10Hz (minimizes quantization error in 16-bit+ data converters) |
| TEMP Pin Output | 630mV at 0°C, +2.1mV/°C slope (enables direct Kelvin-to-voltage conversion for sensorless thermal monitoring) |
| Input Voltage Range | 7V to 33V (compatible with standard industrial 12V/24V rails and legacy ±15V supplies) |
| Load Current | 21mA maximum (drives multiple op-amps or ADC references without external buffering) |
Pinout & Package
REF02DSA is housed in an 8-pin Small Outline (SO) package (S8-2), surface-mount compatible with JEDEC MS-012AC footprint, 1.75mm height, and lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VOUT) | Reference Output | Stable 5V source; requires ≤10nF bypass capacitor for noise suppression |
| 2 (TRIM) | Adjustment Terminal | Connects to wiper of 10kΩ potentiometer for ±6% output tuning (±300mV) |
| 3 (TEMP) | Temperature Transducer Output | Linear analog voltage (630mV @ 0°C, +2.1mV/°C); must be loaded ≤50nA |
| 4 (GND) | Analog Ground | Return path for reference and TEMP outputs; separate from power ground in mixed-signal layouts |
| 5 (N.C.) | No Connection | Internally unconnected; leave floating or tie to GND per layout best practice |
| 6 (N.C.) | No Connection | Internally unconnected; no routing required |
| 7 (VIN) | Positive Supply Input | Accepts 7V–33V DC; internal regulation rejects ripple up to 100dB at 1kHz |
| 8 (N.C.) | No Connection | Internally unconnected; no routing required |
Key Features
| Feature | Design Value |
|---|---|
| Pretrimmed 5V output | Guaranteed 4.975V–5.025V at 25°C eliminates need for initial calibration in production test |
| Integrated temperature transducer | Direct 2.1mV/°C output on dedicated TEMP pin enables analog temperature measurement without external sensors |
| Trim-adjustable output | ±6% range (±300mV) via external potentiometer maintains <0.7ppm/°C/100mV tempco shift |
| Low wideband noise | 15µVP-P (0.1Hz–10Hz) ensures minimal contribution to system noise floor in precision measurement |
| Short-circuit protected | Indefinite short-circuit duration to GND or VIN prevents latch-up or damage during fault conditions |
Applications
| High-Accuracy Data Acquisition | Dual-Supply Precision Instrumentation |
|---|---|
Use Scenario: 16-bit SAR ADC in programmable logic controller (PLC) analog input module requiring stable reference under varying ambient temperatures. IC Role / Device Role / Timing Role: Primary 5V reference source and on-board temperature monitor for self-calibration compensation. Use Value: 25ppm/°C tempco limits reference drift to <0.07% over 0°C–70°C, while TEMP pin enables real-time gain/offset correction. |
Use Scenario: Dual ±10V reference generation using op-amp inverter and REF02DSA as 5V source in bench multimeter front-end. IC Role / Device Role / Timing Role: Stable 5V reference feeding precision inverting amplifier; TEMP pin monitors heatsink temperature for thermal derating. Use Value: ±25mV initial accuracy and 15µVP-P noise ensure <0.01% measurement uncertainty; trim adjust accommodates op-amp offset errors. |
| Industrial Temperature Monitoring | Calibration Standard Generator |
Use Scenario: Remote temperature sensing in HVAC control panel where sensor wiring runs >10 feet from main PCB. IC Role / Device Role / Timing Role: Local temperature transducer with buffered TEMP output driving shielded cable to remote ADC. Use Value: 2.1mV/°C linearity and 630mV offset allow direct Kelvin reading; low output impedance minimizes cable-induced error. |
Use Scenario: Portable calibration standard for field service of digital multimeters requiring traceable 5.000V output. IC Role / Device Role / Timing Role: Adjustable 5V reference with trim pot set to exact 5.000V; TEMP pin verifies unit thermal stability during warm-up. Use Value: ±25mV initial accuracy + ±300mV trim range enables factory-set 5.000V; 25ppm/°C tempco ensures <±0.0035V drift over 70°C span. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF02HSA+ | Same 5V output, 25ppm/°C tempco, and 8-SO package; lead-free finish only (no RoHS exemption) | Identical functional behavior; differs only in packaging compliance status | Select REF02HSA+ when lead-free assembly is mandatory and RoHS-6 compliance is required. |
| MAX6143AESA+ | 5.0V output, 3ppm/°C max tempco, 12ppm/°C typical; higher precision but no TEMP pin | Lacks integrated temperature transducer; requires external sensor for thermal monitoring | Choose MAX6143AESA+ when ultra-low tempco (<3ppm/°C) is critical and TEMP functionality is unnecessary. |
Compared with REF02DSA, REF02HSA+ offers identical electrical performance with RoHS-compliant finish, while MAX6143AESA+ delivers superior temperature stability but omits the TEMP pin - making REF02DSA uniquely suited for combined reference + thermal sensing in space-constrained industrial modules.
Availability
REF02DSA is available at Aetrix Electronics and suitable for industrial data acquisition, precision instrumentation, temperature monitoring, and calibration equipment requiring stable component supply across extended lifecycle programs.
Supply support for REF02DSA 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
Maxim Integrated (now part of Analog Devices) designs high-performance analog and mixed-signal ICs for industrial, automotive, and communications applications.
The REF02DSA belongs to the REF01/REF02 family of precision voltage references engineered for applications demanding stable, low-noise, trimmable references with integrated thermal sensing capability.
FAQ
What is the operating temperature range for the REF02DSA?
The REF02DSA is specified for operation from 0°C to +70°C ambient temperature. This range is confirmed in the Ordering Information table for REF02HSA variants and aligns with the REF02E/REF02H electrical characteristics test conditions. The device's 25ppm/°C max temperature coefficient applies across this full range, ensuring predictable output drift in industrial control environments.
Does the REF02DSA provide a temperature output, and how is it used?
Yes, the REF02DSA provides a linear temperature-dependent voltage on Pin 3 (TEMP), delivering 630mV at 0°C with a slope of +2.1mV/°C. This output is designed for direct connection to an ADC input; design requires limiting load current to ≤50nA and capacitance to ≤30pF to preserve linearity. The REF02DSA datasheet confirms this function is active only on REF02 variants - not REF01 - and is fully characterized in the REF02E/REF02H electrical tables.
What is the input voltage range supported by the REF02DSA?
The REF02DSA supports an input voltage range of 7V to 33V DC, as specified in the ABSOLUTE MAXIMUM RATINGS and ELECTRICAL CHARACTERISTICS sections for REF02E/REF02H devices. This range enables compatibility with common industrial power rails including 12V and 24V systems, and legacy ±15V supplies. Operation below 7V risks dropout; above 33V exceeds absolute maximum rating and may cause permanent damage.
Can the output voltage of the REF02DSA be adjusted, and what is the adjustment range?
Yes, the REF02DSA output can be adjusted using the TRIM pin (Pin 2) with an external 10kΩ potentiometer, providing a ±6% range around 5V - i.e., ±300mV or 4.7V to 5.3V. This adjustment is confirmed in the REF02E/REF02H electrical tables and does not significantly degrade temperature stability: the datasheet specifies ≤0.7ppm/°C change in tempco per 100mV of adjustment.
What is the maximum load current the REF02DSA can drive?
The REF02DSA can deliver up to 21mA of load current while maintaining output voltage within specified tolerance, as documented in the REF02E/REF02H electrical characteristics tables under "Load Current" parameter. This capability supports driving multiple downstream devices such as op-amps, ADC references, or DAC buffers without external amplification - provided power dissipation remains within the 300mW SO-package limit at the given ambient temperature.
REF02DSA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- REF02
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 21 mA
- Tolerance:
- ±2%
- Temperature Coefficient:
- 250ppm/°C
- Noise - 0.1Hz to 10Hz:
- 12µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 8V ~ 30V
- Current - Supply:
- 2mA
- Current - Cathode:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
REF02DSA FAQ
1.How can I place an order for REF02DSA through Aetrix?
Please submit a Request for Quotation (RFQ) for REF02DSA 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 REF02DSA reliable?
The price and inventory of REF02DSA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF02DSA is usually 5 days.
3.What payment methods are accepted for REF02DSA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF02DSA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF02DSA?
REF02DSA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF02DSA 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 REF02DSA?
For technical support, including REF02DSA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF02DSA requirements.
6.How does Aetrix verify that REF02DSA is sourced from the original manufacturer or authorized distributors?
All REF02DSA 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 REF02DSA meets industry standards.
7.What is the process for return or replacement of REF02DSA?
All REF02DSA units undergo pre-shipment inspection (PSI). If there is an issue with REF02DSA, 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 REF02DSA part is unused and in its original packaging.
Return procedure for REF02DSA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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