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Analog Devices Inc./Maxim Integrated REF02CSA+T
- Part No.:
- REF02CSA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
REF02CSA+T.pdf
- Description:
- IC VREF SERIES 1% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,264
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Product details
Overview
REF02CSA+T from Maxim Integrated is a precision 5V voltage reference IC with integrated linear temperature transducer output (TEMP pin), ±50mV initial accuracy, 65ppm/°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 REF02CSA+T datasheet, REF02CSA+T pinout, REF02CSA+T application, or REF02CSA+T equivalent, key selection criteria include its 5V output stability over 0°C to +70°C, TEMP pin linearity (2.1mV/°C), low 10µVP-P (0.1Hz–10Hz) noise, and trimmable ±6% output range for error correction in high-resolution ADC/DAC references.
Technical Context
The REF02CSA+T implements a bandgap-based reference core with buffered 5V output and dedicated TEMP pin delivering voltage proportional to absolute temperature (VT = 2.1 × (T + 273) mV). Its trim terminal allows ±300mV adjustment without degrading temperature stability beyond 0.7ppm/°C per 100mV change.
It features short-circuit protection, indefinite output short duration capability, and operates with 1.0–1.4mA quiescent current. Input voltage range (7V–33V) and load regulation (0.005–0.010%/mA) are optimized for single-supply industrial instrumentation where supply rails vary and load conditions shift dynamically.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.950V to 5.050V at +25°C, enabling ±1% tolerance compliance before trimming |
| Initial Accuracy | ±50mV (±1%), supporting 12-bit system calibration without external trimming |
| Tempco (Max) | 65ppm/°C over 0°C to +70°C, limiting drift to ±2.275mV across full operating range |
| Output Noise | 12µVP-P (0.1Hz–10Hz), critical for sub-LSB stability in 16-bit ADC references |
| TEMP Pin Output | 630mV at +25°C with 2.1mV/°C slope, enabling direct Kelvin-to-voltage conversion |
| Load Current | Up to 21mA sink/source, sufficient to drive op-amp buffers and multiple ADC references |
| Input Voltage Range | 7V to 30V (REF02C grade), compatible with standard 9V/12V/24V industrial rails |
Pinout & Package
REF02CSA+T is housed in an 8-pin Small Outline (SO) package (S8-2), surface-mount, lead-free, with 1.27mm pitch and JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VOUT) | Reference output | Stable 5V source; requires 10µF bypass capacitor for noise suppression |
| 2 (TRIM) | Output adjustment node | Connects to 10kΩ potentiometer for ±6% output tuning; high-impedance input |
| 3 (TEMP) | Temperature transducer output | Provides 2.1mV/°C analog temperature signal; limit current to ±50nA and capacitance to ≤30pF |
| 4 (GND) | Analog ground reference | Must be star-connected to minimize ground bounce in mixed-signal systems |
| 5 (N.C.) | No connection | Internally unconnected; leave floating or tie to GND per layout best practice |
| 6 (VIN) | Positive supply input | Accepts 7V–30V; requires local 1µF ceramic decoupling adjacent to pin |
| 7 (N.C.) | No connection | Internally unconnected; no routing required |
| 8 (N.C.) | No connection | Internally unconnected; no routing required |
Key Features
| Feature | Design Value |
|---|---|
| Pretrimmed 5V output | Reduces factory calibration time; enables drop-in replacement in legacy 5V reference designs |
| Linear temperature transducer | Eliminates need for external sensor and signal conditioning in thermal monitoring subsystems |
| Low 10µVP-P noise (0.1Hz–10Hz) | Preserves effective resolution in precision weigh scales and strain-gauge interfaces |
| ±6% output adjustability | Compensates for PCB trace resistance, op-amp offset, and system-level gain errors |
| Short-circuit protected output | Withstands indefinite fault conditions without latch-up or parametric shift |
Applications
| High-Resolution Data Acquisition | Industrial Temperature Monitoring |
|---|---|
Use Scenario: 16-bit SAR ADC in programmable logic controller (PLC) analog input module. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion and secondary TEMP pin used for ambient sensor compensation. Use Value: 65ppm/°C tempco ensures <±3 LSB drift over 0°C–70°C; TEMP pin replaces discrete thermistor network. | Use Scenario: Remote cabinet temperature telemetry using shielded 4-conductor cable. IC Role / Device Role / Timing Role: Local temperature transducer with 2.1mV/°C output referenced to stable 5V rail. Use Value: Eliminates cold-junction compensation and analog front-end amplification; 630mV @ 25°C provides 10-bit dynamic range over –40°C to +85°C. |
| Calibrated Test Equipment | Multi-Range Precision Power Supply |
Use Scenario: Benchtop digital multimeter requiring traceable 5V reference and internal thermal drift correction. IC Role / Device Role / Timing Role: Master reference for DAC-driven voltage/current outputs; TEMP pin feeds microcontroller for real-time gain/offset correction. Use Value: ±50mV initial error corrected via TRIM pin; 0.005%/mA load regulation maintains accuracy across 10mA output swings. | Use Scenario: Lab-grade power supply with selectable 3.3V/5V/12V outputs and auto-calibration. IC Role / Device Role / Timing Role: Reference for feedback divider networks and TEMP pin monitors heatsink temperature for fan speed control. Use Value: Single-component dual function reduces BOM count; 7V–30V input range accommodates wide-range DC-DC pre-regulator outputs. |
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+ | Lower max tempco (25ppm/°C vs. 65ppm/°C); same SO-8 package and pinout | Better suited for extended-temperature industrial environments where drift budget is tighter | Select REF02HSA+ when operating above +70°C or requiring <±0.875mV total drift over temperature |
| MAX6035AESA+ | Shunt reference (2.5V), 15ppm/°C, 35µA quiescent current, SOT23-3 package | Requires external bias resistor; lower power but no TEMP output or adjustable output | Choose MAX6035AESA+ only for ultra-low-power, space-constrained designs where temperature sensing is handled separately |
Compared with REF02HSA+ and MAX6035AESA+, the REF02CSA+T offers unique integration of adjustable 5V reference and linear temperature transduction in one SO-8 device-enabling simultaneous voltage referencing and thermal monitoring without additional ICs or layout area.
Availability
REF02CSA+T is available at Aetrix Electronics and suitable for industrial PLCs, portable test equipment, calibrated power supplies, and embedded temperature-aware instrumentation requiring stable component supply and long-term parametric consistency.
Supply support for REF02CSA+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 and mixed-signal ICs for industrial, automotive, and communications applications.
The REF02 product line delivers industry-standard 5V voltage references with integrated temperature transduction, targeting high-accuracy measurement, calibration, and thermal-aware power systems.
FAQ
What is the operating temperature range for the REF02CSA+T?
The REF02CSA+T is specified for operation from 0°C to +70°C. This commercial-grade temperature range aligns with standard industrial control environments and avoids the cost premium of extended-temperature variants like REF02CESA+. The device's 65ppm/°C max tempco ensures predictable performance across this span, and all electrical characteristics-including TEMP pin output and output voltage stability-are guaranteed within this range per the official Maxim datasheet.
Can the REF02CSA+T be used as a standalone temperature sensor?
Yes, the REF02CSA+T can serve as a standalone temperature sensor via its dedicated TEMP pin, which outputs 630mV at +25°C with a precise 2.1mV/°C slope. When used this way, the device requires only a stable 7V–30V supply and proper current limiting (<±50nA) on the TEMP pin. Its linearity and known offset enable direct Kelvin-to-voltage conversion without calibration-making REF02CSA+T suitable for cabinet monitoring, thermal shutdown circuits, and ambient sensing where moderate accuracy (±1.5°C) suffices.
How does the TRIM pin on the REF02CSA+T affect temperature stability?
The TRIM pin on the REF02CSA+T allows ±6% output adjustment (±300mV around 5V) with minimal impact on temperature stability: output voltage temperature coefficient degrades by only 0.7ppm/°C per 100mV of adjustment. This means a full ±300mV trim introduces at most ±2.1ppm/°C added tempco uncertainty-well within the 65ppm/°C maximum spec. Therefore, REF02CSA+T retains its guaranteed drift performance even when trimmed, supporting system-level error correction without sacrificing thermal robustness.
What is the maximum load current the REF02CSA+T can drive?
The REF02CSA+T can source or sink up to 21mA while maintaining output voltage within specification. This capability is confirmed across the full 0°C to +70°C range and supports driving op-amp buffers, multiple ADC references, or small discrete loads directly. At 10mA load, load regulation is 0.005%/mA-equivalent to just ±0.5mV change-making REF02CSA+T suitable for multi-channel data acquisition systems where a single reference serves several downstream stages.
Is the REF02CSA+T pin-compatible with other REF02 variants?
Yes, the REF02CSA+T is pin-compatible with all 8-pin SO-packaged REF02 variants-including REF02HSA+, REF02CESA+, and REF02ESA+-as they share identical S8-2 footprint, pin numbering, and terminal functions. Pin 3 is TEMP on all REF02 versions (unlike REF01, where it is N.C.), and VOUT/TRIM/GND/VIN assignments are consistent. This allows direct substitution for tempco or temperature-range upgrades without PCB redesign, provided the system's thermal and accuracy requirements match the selected variant's specifications.
REF02CSA+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:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 21 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 65ppm/°C
- Noise - 0.1Hz to 10Hz:
- 12µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 8V ~ 30V
- Current - Supply:
- 1.6mA
- Current - Cathode:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
REF02CSA+T FAQ
1.How can I place an order for REF02CSA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for REF02CSA+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 REF02CSA+T reliable?
The price and inventory of REF02CSA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF02CSA+T is usually 5 days.
3.What payment methods are accepted for REF02CSA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF02CSA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF02CSA+T?
REF02CSA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF02CSA+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 REF02CSA+T?
For technical support, including REF02CSA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF02CSA+T requirements.
6.How does Aetrix verify that REF02CSA+T is sourced from the original manufacturer or authorized distributors?
All REF02CSA+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 REF02CSA+T meets industry standards.
7.What is the process for return or replacement of REF02CSA+T?
All REF02CSA+T units undergo pre-shipment inspection (PSI). If there is an issue with REF02CSA+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 REF02CSA+T part is unused and in its original packaging.
Return procedure for REF02CSA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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