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Analog Devices Inc./Maxim Integrated REF02CESA+T
- Part No.:
- REF02CESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
REF02CESA+T.pdf
- Description:
- IC VREF SERIES 1% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:762
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Product details
Overview
REF02CESA+T from Maxim Integrated is a precision 5V voltage reference with integrated linear temperature transducer output (TEMP pin), operating from -40°C to +85°C, featuring ±50mV initial accuracy, 65ppm/°C max temperature coefficient, 10µVP-P (0.1Hz–10Hz) output noise, and 1mA quiescent current - used in high-accuracy ADC/DAC calibration and remote temperature sensing circuits.
For engineers reviewing the REF02CESA+T datasheet, REF02CESA+T pinout, REF02CESA+T application, or REF02CESA+T equivalent, this page delivers verified electrical parameters, SO-8 package mapping, TEMP pin functionality, load/line regulation behavior, and validated alternative options for industrial-grade voltage reference selection.
Technical Context
The REF02CESA+T implements a bandgap-based reference core with buffered 5V output and a dedicated TEMP pin delivering 630mV at 0°C with 2.1mV/°C slope. Its trim terminal supports ±6% output adjustment (±300mV) without degrading temperature stability beyond 0.7ppm/°C per 100mV shift.
It operates from 7V to 33V single supply, delivers up to 21mA load current, and maintains ±0.01%/V line regulation and ±0.01%/mA load regulation across its full temperature range. Short-circuit protection and indefinite short-duration tolerance are built-in.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±15mV at TA = +25°C - ensures binary-aligned 5V reference for 12-bit+ data converters. |
| Initial Accuracy | ±50mV (±1.0%) over full -40°C to +85°C range - enables system-level trimming without post-calibration. |
| Tempco (Max) | 65ppm/°C - limits drift to ±26.3mV over full temperature span, critical for unheated industrial enclosures. |
| Output Noise | 10µVP-P (0.1Hz–10Hz) - supports low-noise 16-bit SAR ADCs without external filtering. |
| TEMP Pin Output | 630mV @ 0°C, 2.1mV/°C slope - provides direct Kelvin-scaled analog temperature signal for remote sensor interfaces. |
| Supply Range | 7V to 33V - allows operation from standard 9V, 12V, or 24V rails without external regulators. |
| Quiescent Current | 1.0–1.6mA - enables low-power battery-backed instrumentation with <16.5mW dissipation at 12V input. |
Pinout & Package
REF02CESA+T is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package, 3.9mm × 4.9mm body, 1.27mm pitch, JEDEC MS-012 compliant, with exposed pad option not present. Pin 3 is the TEMP output; pins 1, 7, and 8 are no-connect on this variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connect (NC) | Internally unconnected - must be left floating or tied to GND per layout best practice. |
| 2 | GND | Analog ground reference - requires low-impedance connection to system AGND plane. |
| 3 | TEMP | Linear temperature transducer output - 630mV @ 0°C, 2.1mV/°C; limit current to ±50nA and capacitance to ≤30pF. |
| 4 | VIN | Positive supply input - accepts 7V–33V DC; bypass with ≥1µF ceramic capacitor near pin. |
| 5 | TRIM | Output voltage adjustment node - connect 10kΩ potentiometer between VO and GND for ±6% tuning. |
| 6 | VO | Regulated 5V reference output - capable of sourcing up to 21mA; requires local 1µF decoupling. |
| 7 | No Connect (NC) | Internally unconnected - no routing or termination required. |
| 8 | No Connect (NC) | Internally unconnected - no routing or termination required. |
Key Features
| Feature | Design Value |
|---|---|
| Pretrimmed 5V output | Guaranteed 4.95V–5.05V at +25°C - eliminates factory calibration for most industrial DAQ systems. |
| Integrated TEMP pin | Direct Kelvin-proportional analog output (2.1mV/°C) - replaces discrete thermistor+op-amp stages in temperature monitoring. |
| Adjustable output (±6%) | Supports 4.7V–5.3V tuning via external pot - enables system-level offset correction without firmware changes. |
| Low 10µVP-P noise | Minimizes quantization uncertainty in 16-bit+ ADC applications - avoids need for external low-noise op-amp buffering. |
| Short-circuit protected | Indefinite fault tolerance on VO or TEMP pins - enhances reliability in field-deployed test equipment. |
Applications
| High-Accuracy Data Acquisition | Industrial Temperature Monitoring |
|---|---|
|
Use Scenario: 16-bit isolated analog input module for PLC backplane, measuring 4–20mA sensor loops and thermocouples. IC Role / Device Role / Timing Role: Primary 5V reference for SAR ADC and TEMP pin source for cold-junction compensation. Use Value: Enables ±0.01% total measurement accuracy over -40°C to +70°C ambient without recalibration. |
Use Scenario: Remote environmental sensor node with 100ft shielded cable linking to control cabinet. IC Role / Device Role / Timing Role: Local 5V reference for signal conditioning amplifier and Kelvin-scaled TEMP output driving differential receiver. Use Value: Eliminates RTD linearization firmware and reduces BOM count by integrating reference + transducer in one SO-8 device. |
| Calibration Equipment | Battery-Powered Portable Meter |
|
Use Scenario: Benchtop digital multimeter requiring traceable 5.000V reference for auto-ranging DCV function. IC Role / Device Role / Timing Role: Stable 5V reference with TRIM pin used for periodic NIST-traceable adjustment. Use Value: Maintains ±10ppm/°C effective tempco after trim, meeting ANSI C12.1 Class 0.1 accuracy requirements. |
Use Scenario: Handheld insulation resistance tester with dual 9V battery supply and LCD display. IC Role / Device Role / Timing Role: Low-quiescent 5V reference powering microcontroller ADC and TEMP pin monitoring battery temperature. Use Value: Extends battery life beyond 200 hours while providing thermal shutdown warning at >60°C cell temperature. |
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, 15ppm/°C max tempco, 3.6V–18V supply, no TEMP pin | Lacks temperature transduction; suited for low-voltage µP reference, not sensor interface | Select when only ultra-stable 2.5V is needed and TEMP functionality is unnecessary |
| LM4040C50IDBZR | 5.0V shunt reference, 20ppm/°C max, 60µA typical IQ, requires external bias resistor | Higher noise (20µVP-P), no TEMP output, limited load drive (<15mA), different topology | Choose for cost-sensitive, low-current applications where series topology and TEMP pin are not required |
Compared with REF02CESA+T, MAX6035AESA+ offers superior tempco but lacks the integrated temperature transducer and adjustable output, while LM4040C50IDBZR trades off noise performance, load capability, and TEMP functionality for lower cost and simpler biasing - making REF02CESA+T uniquely suited for combined reference + sensing roles in industrial analog front-ends.
Availability
REF02CESA+T is available at Aetrix Electronics and suitable for high-reliability data acquisition systems, portable test equipment, industrial temperature monitors, and calibration instruments requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for REF02CESA+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 robustness, accuracy, and integration.
The REF02CESA+T belongs to Maxim's legacy precision voltage reference product line, engineered specifically for applications demanding simultaneous high-accuracy voltage referencing and analog temperature sensing in a single SOIC package.
FAQ
What is the operating temperature range of the REF02CESA+T?
The REF02CESA+T is rated for continuous operation from -40°C to +85°C. This extended industrial temperature range is confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables of the official REF01/REF02 datasheet, distinguishing it from commercial-grade variants like REF02E (0°C to +70°C). The REF02CESA+T maintains all specified performance parameters-including initial accuracy, tempco, and TEMP pin slope-across this full range.
Does the REF02CESA+T provide a temperature output, and how is it used?
Yes, the REF02CESA+T provides a linear temperature-dependent voltage on pin 3 (TEMP), delivering 630mV at 0°C with a precise 2.1mV/°C slope. This output is designed for direct connection to an ADC input or differential receiver, enabling Kelvin-scaled temperature measurement without external components. Per datasheet Note 7, current into/out of the TEMP pin must be limited to ±50nA and capacitance to ≤30pF to preserve accuracy.
Can the output voltage of the REF02CESA+T be adjusted, and what is the adjustment range?
Yes, the REF02CESA+T output can be adjusted using the TRIM pin (pin 5) with an external 10kΩ potentiometer, enabling ±6% tuning around the nominal 5.000V - i.e., 4.70V to 5.30V. Datasheet Section "Output Adjustment" confirms this range applies to all REF02 variants including REF02CESA+T, and notes that adjustment introduces only ~0.7ppm/°C additional tempco per 100mV shift.
What is the maximum load current the REF02CESA+T can source?
The REF02CESA+T can source up to 21mA while maintaining output voltage within specified tolerance, as documented in the "Load Current" parameter under ELECTRICAL CHARACTERISTICS-REF02C. This rating holds across the full -40°C to +85°C temperature range and is validated with VIN = +15V. At higher temperatures or lower input voltages, the practical limit may reduce due to power dissipation constraints in the SO-8 package (300mW max).
Is the REF02CESA+T pin-compatible with other REF02 variants in SO-8 packages?
Yes, the REF02CESA+T shares identical pinout and SO-8 (S8-2) package dimensions with all other REF02 SO variants including REF02HSA+, REF02CSA+, and REF02HSA. Pin functions - VO (6), TRIM (5), GND (2), VIN (4), TEMP (3), and NC (1,7,8) - are consistent across the family. However, electrical specifications (e.g., tempco, initial error) differ by grade, so substitution requires verification against system accuracy requirements.
REF02CESA+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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
REF02CESA+T FAQ
1.How can I place an order for REF02CESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for REF02CESA+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 REF02CESA+T reliable?
The price and inventory of REF02CESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF02CESA+T is usually 5 days.
3.What payment methods are accepted for REF02CESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF02CESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF02CESA+T?
REF02CESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF02CESA+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 REF02CESA+T?
For technical support, including REF02CESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF02CESA+T requirements.
6.How does Aetrix verify that REF02CESA+T is sourced from the original manufacturer or authorized distributors?
All REF02CESA+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 REF02CESA+T meets industry standards.
7.What is the process for return or replacement of REF02CESA+T?
All REF02CESA+T units undergo pre-shipment inspection (PSI). If there is an issue with REF02CESA+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 REF02CESA+T part is unused and in its original packaging.
Return procedure for REF02CESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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