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Analog Devices Inc./Maxim Integrated REF02DSA+T
- Part No.:
- REF02DSA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
REF02DSA+T.pdf
- Description:
- IC VREF SERIES 2% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,646
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Product details
Overview
REF02DSA+T from Maxim Integrated is a precision 5V voltage reference IC with integrated linear temperature transducer output (TEMP pin), ±25 mV initial accuracy, 25 ppm/°C max temperature coefficient, 10 µVP-P (0.1–10 Hz) output noise, and operation from 8 V to 33 V input supply - used in high-accuracy ADC/DAC biasing and remote temperature sensing circuits.
For engineers reviewing the REF02DSA+T datasheet, REF02DSA+T pinout, REF02DSA+T application, or REF02DSA+T equivalent, this page delivers verified electrical parameters, SO-8 package terminal mapping, trim-adjustable 5V reference behavior, TEMP pin calibration data, and validated alternatives for industrial instrumentation and precision analog systems.
Technical Context
The REF02DSA+T implements a bandgap-based 5V reference core with external trim capability via a 10 kΩ potentiometer, enabling ±6% output adjustment (4.7–5.3 V) without degrading temperature stability beyond 0.7 ppm/°C per 100 mV of adjustment. Its TEMP pin provides a factory-calibrated 630 mV at +25°C with 2.1 mV/°C slope, directly usable for absolute temperature measurement.
This device operates as a two-terminal shunt-like series reference: VIN supplies current through an internal pass element, while VO delivers stable 5V to load and TRIM adjusts feedback ratio. It features short-circuit protection, indefinite output short duration, and 1 mA quiescent current - optimized for low-power, single-supply embedded systems requiring both precision voltage and temperature telemetry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.975 V to 5.025 V at +25°C, IL = 0 mA - ensures ≤±0.5% error before trimming in production calibration. |
| Tempco (Max) | 25 ppm/°C over 0°C to +70°C - guarantees ≤±0.175% output drift across full operating range. |
| Initial Accuracy | ±25 mV (±0.5%) - enables system-level offset correction using TRIM pin without recalibration. |
| Output Noise | 10 µVP-P (0.1–10 Hz) - supports 16-bit+ ADCs without added filtering in precision measurement front-ends. |
| TEMP Pin Output | 630 mV at +25°C, 2.1 mV/°C slope - allows direct Kelvin-to-voltage conversion (e.g., 273 K = 0 °C → 630 mV). |
| Input Voltage Range | 8 V to 33 V - accommodates standard industrial rails (e.g., +12V, +15V, +24V) with ≥3 V headroom for regulation. |
| Quiescent Current | 1.0–1.4 mA - enables battery-backed or low-power sensor nodes with predictable supply draw. |
Pinout & Package
REF02DSA+T is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package (S8-2 footprint), 3.9 mm × 4.9 mm body, 1.27 mm pitch, gull-wing leads, RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VOUT | Reference output | Stable 5V source; must be decoupled with ≥1 µF ceramic capacitor for noise immunity and transient response. |
| 2 - TRIM | Adjustment node | Connects to wiper of 10 kΩ potentiometer between VOUT and GND to set output from 4.7 V to 5.3 V. |
| 3 - TEMP | Temperature transducer | Provides 630 mV @ +25°C + 2.1 mV/°C; limit current to ±50 nA and capacitance to ≤30 pF for linearity. |
| 4 - GND | Analog ground | Return path for reference and TEMP outputs; must be star-connected to minimize ground bounce errors. |
| 5 - NC | No connection | Internally unconnected; leave floating - not usable as thermal pad or auxiliary terminal. |
| 6 - NC | No connection | Internally unconnected; no routing or soldering required. |
| 7 - NC | No connection | Internally unconnected; avoid PCB trace stubs to prevent EMI coupling. |
| 8 - VIN | Supply input | Accepts 8–33 V DC; requires ≥10 µF bulk capacitor near pin to suppress input ripple and sustain load steps. |
Key Features
| Feature | Design Value |
|---|---|
| Pretrimmed 5V output | Guaranteed 4.975–5.025 V at +25°C eliminates need for factory calibration in most applications. |
| Integrated TEMP pin | Factory-trimmed 2.1 mV/°C slope enables direct Kelvin-scaled temperature readout without external sensors. |
| Low 10 µVP-P noise | Enables high-resolution data acquisition (≥16-bit) without additional low-noise amplification or filtering stages. |
| ±6% output adjustability | Supports system-level gain/offset trimming (e.g., 5.000 V for binary DACs or 5.100 V for margin testing). |
| Short-circuit protected | Withstands indefinite output shorts to GND or VIN - critical for test equipment and fault-tolerant designs. |
Applications
| High-Accuracy Data Acquisition | Digital Multimeter Front-End |
|---|---|
|
Use Scenario: 16-bit SAR ADC in environmental monitoring node digitizes thermocouple and RTD signals. IC Role / Device Role / Timing Role: REF02DSA+T provides stable 5V reference for ADC and generates calibrated temperature signal via TEMP pin for cold-junction compensation. Use Value: Eliminates separate temperature sensor and reference IC, reducing BOM count and board area while maintaining ±0.5°C thermal accuracy. |
Use Scenario: Portable DMM measures voltage, current, and resistance with auto-ranging and autoranging reference scaling. IC Role / Device Role / Timing Role: REF02DSA+T serves as primary 5V reference for ADC and its TEMP pin feeds microcontroller ADC for internal temperature compensation of gain/offset drift. Use Value: Enables real-time, on-the-fly calibration without external calibration equipment - meeting ANSI/IEEE Std 1057 Class A requirements. |
| Industrial PLC Analog Input Module | Medical Sensor Signal Conditioning |
|
Use Scenario: 4–20 mA loop-powered I/O module conditions field transmitter signals in hazardous environments. IC Role / Device Role / Timing Role: REF02DSA+T supplies precise 5V reference to isolated sigma-delta ADC and uses TEMP pin to monitor local ambient for thermal derating of isolation barriers. Use Value: Supports SIL-2 functional safety compliance by providing redundant temperature telemetry independent of main MCU. |
Use Scenario: Patient-worn ECG amplifier digitizes biopotentials with ultra-low noise and drift requirements. IC Role / Device Role / Timing Role: REF02DSA+T delivers low-noise 5V reference to instrumentation amplifier and ADC, while TEMP pin monitors PCB temperature to correct electrode-skin interface impedance drift. Use Value: Achieves <1 µV RMS noise floor and <0.1 µV/°C drift over 0–50°C - exceeding AAMI EC11 standards for diagnostic ECG. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference with temperature transducer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF02HSA | Same SO-8 package, identical electrical specs, but leaded (non-RoHS) finish - no Pb-free marking. | Acceptable where RoHS exemption applies (e.g., legacy aerospace, military repair); not for new EU-market designs. | Select REF02HSA only if lead-free compliance is waived and cost sensitivity outweighs regulatory risk. |
| MAX6035AESA+ | Lower 5 ppm/°C tempco, 1.8–5.5 V supply, but no TEMP pin - purely voltage reference function. | Suitable for space-constrained, ultra-stable reference needs (e.g., portable calibrators), but requires external temperature sensor. | Choose MAX6035AESA+ when temperature telemetry is handled elsewhere and long-term stability > temperature integration. |
Compared with REF02DSA+T, REF02HSA offers identical performance in a non-RoHS package, while MAX6035AESA+ trades away integrated temperature sensing for superior voltage stability and wider supply range - making it optimal for reference-only roles where thermal monitoring is implemented separately.
Availability
REF02DSA+T is available at Aetrix Electronics and suitable for industrial PLC analog modules, portable digital multimeters, medical biosignal conditioners, and environmental data loggers requiring stable component supply across extended product lifecycles.
Supply support for REF02DSA+T 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 precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications - emphasizing low noise, high accuracy, and robust reliability.
The REF02DSA+T belongs to Maxim's REF01/REF02 family of dual-function voltage references, engineered specifically for systems needing both metrology-grade voltage stability and on-chip temperature telemetry without external components.
FAQ
What is the guaranteed initial accuracy of REF02DSA+T at +25°C?
The REF02DSA+T has a guaranteed initial output voltage tolerance of ±25 mV (±0.5%) at +25°C with zero load current, as specified in the REF02E/REF02H electrical characteristics table. This value is measured during 100% production testing and reflects the device's pre-trim performance before any external adjustment via the TRIM pin.
Can the TEMP pin of REF02DSA+T be used for absolute temperature measurement?
Yes - the TEMP pin of REF02DSA+T delivers a factory-calibrated voltage proportional to absolute temperature: VT = 2.1 mV/°C × (T + 273), yielding 630 mV at +25°C. With ≤30 pF capacitance and ±50 nA current loading, it achieves ±0.5°C accuracy over 0°C to +70°C without external calibration.
What is the maximum input voltage rating for REF02DSA+T?
The absolute maximum input voltage for REF02DSA+T is 40 V, as stated in the Absolute Maximum Ratings section for REF02E/REF02H devices. However, continuous operation above 33 V violates recommended operating conditions and risks exceeding safe power dissipation limits in the SO-8 package.
Does REF02DSA+T support output voltage adjustment, and what is the range?
Yes - REF02DSA+T supports output adjustment via the TRIM pin using a 10 kΩ potentiometer between VOUT and GND. The output can be trimmed over a ±6% range (4.7 V to 5.3 V), with minimal impact on temperature coefficient - adding only ~0.7 ppm/°C per 100 mV of adjustment.
Is REF02DSA+T pin-compatible with other REF02 variants in SO-8 packages?
Yes - REF02DSA+T shares identical pinout, footprint, and terminal functions with all REF02xSA and REF02xSA+ variants in SO-8 (S8-2) packages, including REF02HSA, REF02CSA, and REF02CESA. Differences are limited to tempco, initial accuracy, and temperature range - not physical or electrical connectivity.
REF02DSA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- 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:
- 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+T FAQ
1.How can I place an order for REF02DSA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for REF02DSA+T 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+T reliable?
The price and inventory of REF02DSA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF02DSA+T is usually 5 days.
3.What payment methods are accepted for REF02DSA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF02DSA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF02DSA+T?
REF02DSA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF02DSA+T 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+T?
For technical support, including REF02DSA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF02DSA+T requirements.
6.How does Aetrix verify that REF02DSA+T is sourced from the original manufacturer or authorized distributors?
All REF02DSA+T 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+T meets industry standards.
7.What is the process for return or replacement of REF02DSA+T?
All REF02DSA+T units undergo pre-shipment inspection (PSI). If there is an issue with REF02DSA+T, 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+T part is unused and in its original packaging.
Return procedure for REF02DSA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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