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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:
- IC VREF SERIES 2% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,960
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Product details
Overview
REF02DSA+ from Maxim Integrated is a precision 5V voltage reference with integrated linear temperature transducer output (TEMP pin), designed for high-accuracy analog systems requiring stable reference and on-chip temperature sensing. It delivers ±15mV initial accuracy, 8.5ppm/°C max temperature coefficient over 0°C to +70°C, 10µVP-P (0.1Hz–10Hz) output noise, and operates from 7V to 33V input supply. Used in precision ADC/DAC calibration, thermal monitoring circuits, and industrial sensor signal chains.
For engineers reviewing the REF02DSA+ datasheet, REF02DSA+ pinout, REF02DSA+ application, or REF02DSA+ equivalent, key selection criteria include its dual-function 5V reference + temperature voltage output (630mV at 25°C, 2.1mV/°C), SO-8 package compatibility, trim-adjustable ±6% output range, and guaranteed performance across commercial temperature range without derating.
Technical Context
The REF02DSA+ integrates a bandgap-based 5V reference core with a dedicated TEMP pin that outputs a voltage linearly proportional to absolute temperature (VT = 2.1 × (T + 273) mV). Its internal trim architecture allows ±6% output adjustment via external resistor without degrading temperature stability beyond 0.7ppm/°C per 100mV of adjustment.
It features short-circuit protection, 1mA quiescent current, 230µs turn-on settling time to ±0.1%, and load capability up to 21mA. The SO-8 package supports surface-mount assembly and thermal dissipation up to 300mW (derated above +55°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.985V to 5.015V at 25°C (±15mV initial error; enables direct replacement of 5V references in metrology-grade designs) |
| Tempco (max) | 8.5ppm/°C over 0°C to +70°C (ensures ≤±0.06% output drift across full operating range) |
| TEMP Pin Output | 630mV at +25°C, 2.1mV/°C slope (provides calibrated absolute temperature sensing without external components) |
| Noise (0.1–10Hz) | 10µVP-P (supports high-resolution 20-bit+ data acquisition without added filtering) |
| Input Voltage Range | 7V to 33V (enables single-supply operation in 12V/24V industrial rails with 2V headroom margin) |
| Load Current | Up to 21mA (drives multiple op-amps or ADC reference inputs directly) |
| Quiescent Current | 1.0–1.4mA (minimizes power impact in battery-backed or low-power systems) |
Pinout & Package
REF02DSA+ is housed in an 8-pin Small Outline (SO) package (S8-2 footprint), compatible with JEDEC MS-012AC, with 1.27mm lead pitch and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VOUT) | Reference output | Stable 5V precision voltage source; requires 10µF ceramic bypass for optimal noise performance |
| 2 (TRIM) | Output adjustment terminal | Connects to external 10kΩ potentiometer for ±6% output tuning; minimal tempco impact |
| 3 (TEMP) | Temperature transducer output | Linear 2.1mV/°C voltage proportional to absolute temperature; limit current to ±50nA, capacitance to 30pF |
| 4 (GND) | Analog ground | Primary return path for reference and TEMP circuits; must be star-connected to minimize noise coupling |
| 5 (N.C.) | No connection | Internally unconnected; leave floating or tie to GND per layout best practice |
| 6 (N.C.) | No connection | Internally unconnected; leave floating or tie to GND per layout best practice |
| 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; leave floating or tie to GND per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Pretrimmed 5V output | Guaranteed 4.985V–5.015V at 25°C eliminates need for factory calibration in production test |
| Integrated temperature transducer | Direct 630mV @ 25°C, 2.1mV/°C output enables single-component thermal feedback in power supplies or environmental monitors |
| Low 0.1–10Hz noise | 10µVP-P ensures <1 LSB error in 20-bit SAR ADCs with 5V full-scale range |
| Adjustable output range | ±6% trimming (4.7V–5.3V) accommodates system-level gain/offset correction without redesigning reference network |
| Short-circuit protected | Indefinite short-to-ground or VIN tolerance prevents latch-up or damage during board bring-up or fault conditions |
Applications
| High-Accuracy Data Acquisition | Precision Temperature Monitoring |
|---|---|
|
Use Scenario: 24-bit delta-sigma ADC front-end in portable multimeter or calibration standard. IC Role / Device Role / Timing Role: Primary 5V reference for ADC VREF input and internal PGA gain-setting; TEMP pin feeds auxiliary ADC channel for ambient compensation. Use Value: Enables <±2ppm total unadjusted error (TUE) over temperature by correlating reference drift and sensor offset in firmware. |
Use Scenario: Remote temperature sensing in telecom base station power module with local thermal management. IC Role / Device Role / Timing Role: Dual-role device: 5V reference for isolated current-sense amplifier, and absolute temperature sensor for fan speed control loop. Use Value: Eliminates separate temperature IC and reference, reducing BOM count and PCB area while maintaining ±0.5°C accuracy after one-point calibration. |
| Industrial Sensor Signal Conditioning | Programmable Voltage Reference Module |
|
Use Scenario: Strain-gauge bridge amplifier in load cell interface with ratiometric output scaling. IC Role / Device Role / Timing Role: Excitation reference for bridge and ADC reference; TEMP pin monitors amplifier die temperature for gain drift correction. Use Value: Achieves <10ppm/°C system-level TCK using correlated drift cancellation between bridge excitation and ADC reference paths. |
Use Scenario: Configurable reference subsystem in modular test equipment supporting multiple DUT voltage requirements. IC Role / Device Role / Timing Role: Adjustable 5V reference with onboard TEMP monitoring for self-calibration routines and thermal derating logic. Use Value: ±6% trim range allows software-selectable output (e.g., 4.9152V for binary-aligned 16-bit DACs) without hardware change. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6035AESA+ | 2.5V fixed output, 3ppm/°C max tempco, no TEMP pin, SO-8 | Lacks temperature sensing; optimized for ultra-low-drift, not dual-function use | Select when only ultra-stable 2.5V reference is needed and temperature monitoring is handled separately |
| LM4040C50IDBZR | 5V shunt reference, 20ppm/°C max tempco, 100µA typical IREF, SOT-23-3 | Requires external bias resistor; no TEMP output; lower accuracy and higher tempco | Select for cost-sensitive, space-constrained designs where ±0.5% accuracy suffices and temperature sensing is unnecessary |
Compared with REF02DSA+, MAX6035AESA+ offers superior 3ppm/°C stability but lacks temperature transduction, while LM4040C50IDBZR provides compact size and low cost at the expense of accuracy, noise, and missing dual functionality-making REF02DSA+ uniquely suited for integrated reference + thermal sensing in industrial analog systems.
Availability
REF02DSA+ is available at Aetrix Electronics and suitable for high-accuracy data acquisition, industrial sensor signal conditioning, and programmable voltage reference modules requiring stable component supply and long-term parametric consistency.
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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.
The REF02DSA+ belongs to Maxim's precision voltage reference product line, engineered to deliver stable, low-noise, and functionally enriched references for metrology-grade instrumentation and thermally aware embedded systems.
FAQ
What is the guaranteed initial accuracy of REF02DSA+ at 25°C?
The REF02DSA+ has a guaranteed initial output voltage tolerance of ±15mV at +25°C, corresponding to 4.985V to 5.015V. This specification is 100% production tested and applies to all units shipped in the REF02DSA+ variant, ensuring consistent performance without post-manufacturing calibration for most precision applications.
How does the TEMP pin on REF02DSA+ function, and what is its output equation?
The TEMP pin on REF02DSA+ outputs a voltage linearly proportional to absolute temperature: VT = 2.1 × (T + 273) mV, where T is in °C. At +25°C, this yields 630mV ±10mV. The pin must be loaded with ≤50nA and ≤30pF to maintain accuracy, enabling direct connection to an ADC for calibrated temperature measurement without external components.
Can REF02DSA+ be used with input voltages below 7V?
No. REF02DSA+ requires a minimum input voltage of 7V for proper regulation and specified performance. Operation below 7V may result in unregulated output, increased noise, or failure to maintain 5V output within tolerance. The recommended operating range remains strictly 7V to 33V, as validated across temperature and load conditions in the official datasheet.
What is the maximum load current REF02DSA+ can drive while maintaining output accuracy?
REF02DSA+ guarantees full output accuracy (±15mV initial error plus tempco drift) up to 21mA load current. Beyond this, output voltage deviation increases nonlinearly due to internal pass element limitations. For designs requiring >21mA, an external buffer amplifier is recommended to preserve reference integrity while delivering higher current.
Is REF02DSA+ pin-compatible with other REF02 variants in SO-8 packages?
Yes. REF02DSA+ shares identical pinout, footprint, and electrical behavior with all REF02xSA and REF02xSA+ variants in SO-8 (S8-2) packages-including REF02HSA+, REF02CSA+, and REF02CESA+. Differences lie only in temperature range, tempco, and initial error specifications; no PCB layout changes are required when upgrading or substituting within the SA+ family.
REF02DSA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- REF02
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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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