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Analog Devices Inc./Maxim Integrated REF02CESA+
- Part No.:
- REF02CESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
REF02CESA+.pdf
- Description:
- IC VREF SERIES 1% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,853
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Product details
Overview
REF02CESA+ from Maxim Integrated is a precision 5V voltage reference with integrated linear temperature transducer output (TEMP pin), designed for high-stability analog systems operating from -40°C to +85°C. It delivers ±50mV initial accuracy, 65ppm/°C max temperature coefficient, 10µVP-P (0.1Hz–10Hz) output noise, and supports 10mA load current with 1mA quiescent supply current. It is used in precision ADC/DAC calibration, remote temperature sensing, and industrial instrumentation.
For engineers reviewing the REF02CESA+ datasheet, REF02CESA+ pinout, REF02CESA+ application, or REF02CESA+ equivalent, key selection criteria include its extended temperature range (-40°C to +85°C), TEMP pin linearity (2.1mV/°C), ±6% output adjustability via external resistor, and SO-8 package compatibility with automated assembly.
Technical Context
The REF02CESA+ implements a bandgap-based reference core with buffered 5V output and a dedicated TEMP terminal that provides a 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 of adjustment.
It operates from a single 7V–33V supply, features short-circuit protection, and maintains ±0.01%/V line regulation and ±0.01%/mA load regulation over its full temperature range. The TEMP pin requires ≤50nA current sourcing/sinking and ≤30pF capacitance for specified accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000 V ±50 mV at TA = +25°C - sets system gain/offset baseline with known error budget |
| Tempco (max) | 65 ppm/°C over -40°C to +85°C - limits drift to ±26.3 mV across full range |
| Initial Accuracy | ±50 mV - enables direct use in 12-bit systems without trimming |
| Output Noise | 10 µVP-P (0.1Hz–10Hz) - supports <16-bit resolution in low-frequency measurement |
| TEMP Pin Output | 630 mV at +25°C, 2.1 mV/°C slope - provides calibrated absolute temperature sensing without external signal conditioning |
| Supply Range | 7V to 33V - compatible with standard industrial 12V/24V rails and legacy ±15V supplies |
| Quiescent Current | 1.0–1.4 mA - enables low-power operation in battery-backed or energy-constrained systems |
Pinout & Package
REF02CESA+ is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package (PKG Code S8-2), surface-mount compatible, with 1.27mm pitch and JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VOUT) | Reference Output | Stable 5V source; drives loads up to 10mA with minimal regulation error |
| 2 (TRIM) | Output Adjustment | Connects to external 10kΩ potentiometer to tune output ±6% (±300mV) without affecting tempco significantly |
| 3 (TEMP) | Temperature Transducer | Provides 2.1mV/°C output referenced to GND; requires ≤30pF loading for linearity |
| 4 (GND) | Analog Ground | Return path for reference and TEMP outputs; must be low-impedance and separate from digital ground |
| 5 (N.C.) | No Connection | Internally unconnected; must remain floating or tied to GND per layout guidelines |
| 6 (VIN) | Positive Supply Input | Accepts 7V–33V DC; internal regulator rejects ripple and line variations |
| 7 (N.C.) | No Connection | Internally unconnected; must remain floating or tied to GND per layout guidelines |
| 8 (N.C.) | No Connection | Internally unconnected; must remain floating or tied to GND per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Pretrimmed 5V output | Reduces system-level calibration steps; ±50mV initial error supports 12-bit DAC/ADC full-scale use |
| Integrated TEMP pin | Eliminates need for external sensor and signal chain-directly interfaces to ADC for temperature monitoring |
| ±6% output adjustability | Enables fine-tuning of system gain/offset to compensate for downstream component tolerances |
| Low 10µVP-P noise | Preserves dynamic range in precision data acquisition; avoids post-processing filtering overhead |
| Short-circuit protected output | Withstands indefinite fault conditions on VOUT without latch-up or degradation |
Applications
| High-Accuracy Data Acquisition | Industrial Temperature Monitoring |
|---|---|
Use Scenario: 16-bit SAR ADC in programmable logic controller (PLC) analog input module requiring stable reference under varying ambient conditions. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion and secondary TEMP pin used for cold-junction compensation of thermocouple inputs. Use Value: Single-component dual function eliminates separate temperature sensor and reduces BOM count while maintaining ±0.5°C sensing accuracy over -40°C to +85°C. | Use Scenario: Remote environmental sensor node with long cable runs between sensor head and control unit. IC Role / Device Role / Timing Role: Reference generator for local signal conditioning and linear temperature transducer feeding differential ADC input. Use Value: TEMP pin's ratiometric output (2.1mV/°C) enables accurate temperature reading despite voltage drop across 10-foot shielded cable, avoiding 4–20mA loop complexity. |
| Calibration Equipment | Power Supply Feedback Reference |
Use Scenario: Benchtop digital multimeter (DMM) requiring traceable 5V reference with low thermal hysteresis. IC Role / Device Role / Timing Role: Master reference for internal DAC-based voltage generation and self-calibration routine. Use Value: 65ppm/°C tempco and <10µVP-P noise ensure <10ppm total uncertainty over operating range, meeting Class A DMM requirements. | Use Scenario: Programmable lab power supply using voltage-mode feedback control with adjustable output. IC Role / Device Role / Timing Role: Precision 5V reference for DAC-controlled setpoint and TRIM pin used to scale output range (e.g., 0–30V). Use Value: ±6% adjustability allows one REF02CESA+ design to support multiple output ranges without changing reference IC, simplifying inventory and firmware. |
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, ultra-stable references where space or power is constrained | Select when 5V output and temperature sensing are not required, and tighter tempco is critical |
| LM4040C50IDBZR | 5V shunt reference, 100ppm/°C max tempco, 60µA typical IQ, no TRIM or TEMP pins | Requires external bias resistor; unsuitable for TEMP-based sensing or output trimming | Select for cost-sensitive, low-quiescent-current applications where ±1% accuracy suffices and board space is limited |
Compared with MAX6035AESA+ and LM4040C50IDBZR, REF02CESA+ uniquely combines 5V precision, wide-temp operation, output adjustability, and integrated temperature transduction in one SO-8 package-making it optimal for multi-function analog subsystems where integration reduces component count and improves system-level accuracy.
Availability
REF02CESA+ is available at Aetrix Electronics and suitable for industrial instrumentation, precision test equipment, and embedded temperature-aware systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for REF02CESA+ 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 REF02 product line delivers precision voltage references with integrated temperature transduction, targeting applications needing both stable excitation and environmental awareness in compact form factors.
FAQ
What is the maximum allowable capacitance on the TEMP pin of the REF02CESA+?
The REF02CESA+ datasheet specifies a maximum capacitance of 30pF on the TEMP pin to maintain linearity and accuracy of the temperature transducer output. Exceeding this value may cause instability or deviation from the nominal 2.1mV/°C slope. For remote sensing, use shielded twisted-pair cabling and avoid adding bypass capacitors directly at the pin unless compensated per application note AN6029.
Can the REF02CESA+ operate from a 5V supply?
No, the REF02CESA+ requires a minimum input voltage of 7V to regulate its internal 5V reference and TEMP circuitry properly. Attempting to power it from 5V will result in unregulated output and undefined TEMP pin behavior. For 5V-supply systems, consider alternatives like the MAX6035AESA+ (2.5V) or external boost regulation.
Does the REF02CESA+ support bidirectional current on the TEMP pin?
No-the TEMP pin of the REF02CESA+ is a unidirectional voltage source designed to sink or source only up to ±50nA. It must not be driven by external voltage sources or loaded with active circuitry. Connecting op-amps or ADC inputs directly is acceptable if input bias current remains below 50nA and input capacitance stays ≤30pF.
How does output trimming affect the temperature coefficient of the REF02CESA+?
Trimming the REF02CESA+ output changes its temperature coefficient by approximately 0.7ppm/°C per 100mV of adjustment. For example, adjusting from 5.000V to 5.300V increases the worst-case tempco from 65ppm/°C to ~67.1ppm/°C over -40°C to +85°C. This effect is linear and documented in the datasheet's "Change in VO Temperature Coefficient with Output Adjustment" parameter.
Is the REF02CESA+ pin-compatible with other REF02 variants in SO-8 packages?
Yes-the REF02CESA+ shares identical pinout, footprint, and electrical interface with all REF02xSA and REF02xSA+ variants in SO-8 (S8-2) packages, including REF02HSA+, REF02CSA+, and REF02CESA. Differences lie solely in temperature range, tempco, and initial accuracy-not connectivity or function mapping.
REF02CESA+ 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:
- 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+ FAQ
1.How can I place an order for REF02CESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for REF02CESA+ 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+ reliable?
The price and inventory of REF02CESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF02CESA+ is usually 5 days.
3.What payment methods are accepted for REF02CESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF02CESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF02CESA+?
REF02CESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF02CESA+ 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+?
For technical support, including REF02CESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF02CESA+ requirements.
6.How does Aetrix verify that REF02CESA+ is sourced from the original manufacturer or authorized distributors?
All REF02CESA+ 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+ meets industry standards.
7.What is the process for return or replacement of REF02CESA+?
All REF02CESA+ units undergo pre-shipment inspection (PSI). If there is an issue with REF02CESA+, 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+ part is unused and in its original packaging.
Return procedure for REF02CESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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