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Texas Instruments REF02AU/2K5G4
- Part No.:
- REF02AU/2K5G4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
REF02AU/2K5G4.pdf
- Description:
- IC VREF SERIES 0.3% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,907
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Product details
Overview
REF02AU/2K5G4 from Texas Instruments is a precision +5V voltage reference IC with ±0.2% initial accuracy, 10ppm/°C max temperature drift over –40°C to +85°C, and 10µVPP low-frequency noise (0.1Hz–10Hz). It operates from 8V to 40V supply, draws ≤1.4mA quiescent current, and delivers up to ±21mA load current - ideal for high-accuracy A/D and D/A converter biasing in portable instrumentation.
For engineers reviewing the REF02AU/2K5G4 datasheet, REF02AU/2K5G4 pinout, REF02AU/2K5G4 application, or REF02AU/2K5G4 equivalent, key selection criteria include output adjustability (±6%), line regulation (0.01%/V max), load regulation (0.008%/mA max), short-circuit protection, and SOIC-8 packaging compatibility with industrial-grade thermal stability.
Technical Context
The REF02AU/2K5G4 implements a laser-trimmed bandgap reference core with external trim capability via Pin 6 (Trim), enabling ±6% output adjustment while maintaining <0.7ppm/°C/100mV added drift. Its internal architecture supports stable operation under wide input voltage (8V–40V) and load (0–10mA) variations without requiring external compensation.
Pin 3 (Temp) provides a linear 630mV nominal temperature-sensing voltage (2.1mV/°C), decoupled from output regulation - enabling simultaneous precision referencing and on-chip temperature monitoring in single-supply systems. The device features built-in short-circuit protection and indefinite output short duration tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +5.000V ±15mV at 25°C - ensures binary-compatible 5.12V calibration when trimmed. |
| Temp Drift | ≤10ppm/°C (–40°C to +85°C) - guarantees ≤±0.5mV total output shift across full industrial range. |
| Noise (0.1–10Hz) | ≤10µVPP - minimizes quantization error in 16-bit+ ADC systems. |
| Line Regulation | ≤0.01%/V (8.5V–33V) - rejects >40dB of supply ripple without external filtering. |
| Load Regulation | ≤0.008%/mA (0–10mA) - maintains accuracy despite dynamic load changes in DAC buffer stages. |
| Quiescent Current | ≤1.4mA - enables battery-powered metering with >1-year runtime on AA cells. |
| Supply Range | 8V to 40V - supports unregulated industrial rails and legacy ±15V systems via simple resistor drop. |
Pinout & Package
REF02AU/2K5G4 is housed in an SOIC-8 (D) package per JEDEC MS-012AA, 3.9mm width, 1.75mm max height, RoHS-compliant NIPDAU lead finish, MSL Level-3 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Internally unused; must remain floating or grounded per layout guidelines. |
| 2 (VIN) | Positive Supply Input | Accepts 8V–40V DC; requires ≥0.1µF local ceramic bypass to GND. |
| 3 (Temp) | Temperature Sensor Output | 630mV @ 25°C, 2.1mV/°C slope; insensitive to capacitive loading. |
| 4 (GND) | Analog Ground Reference | Primary return path for reference output and internal circuitry; separate from power ground recommended. |
| 5 (NC) | No Connect | Internally unused; must remain floating or grounded per layout guidelines. |
| 6 (Trim) | Output Adjustment Terminal | Connects to wiper of 10kΩ potentiometer between VOUT and GND for ±6% trimming. |
| 7 (VOUT) | Precision +5V Output | Regulated output capable of sourcing/sinking ±21mA; low-noise node requiring dedicated trace routing. |
| 8 (NC) | No Connect | Internally unused; must remain floating or grounded per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed temperature coefficient | Guarantees ≤10ppm/°C drift without external calibration - reduces system-level temperature compensation overhead. |
| External output adjustment | ±6% trim range via single potentiometer preserves <0.7ppm/°C/100mV added drift - enables field calibration without redesign. |
| Integrated temperature sensor | Linear 630mV/25°C output with 2.1mV/°C slope - eliminates need for discrete thermistor network in dual-function circuits. |
| Short-circuit protected output | Withstands indefinite output-to-ground or output-to-VIN shorts - enhances reliability in test equipment with probe contact faults. |
| Low 10µVPP noise floor | Enables <1 LSB error in 18-bit SAR ADCs sampling at 100ksps - critical for digital voltmeter front-ends. |
Applications
| Digital Voltmeters | A/D and D/A Converters |
|---|---|
Use Scenario: High-resolution benchtop DVM measuring 0–10V full-scale with 100µV resolution. IC Role / Device Role / Timing Role: Primary 5V reference for 24-bit delta-sigma ADC and internal DAC used in auto-ranging circuitry. Use Value: 10ppm/°C drift limits calibration interval to once per year; 10µVPP noise prevents dither-induced measurement uncertainty. | Use Scenario: Industrial PLC analog I/O module converting 4–20mA sensor signals to digital and back. IC Role / Device Role / Timing Role: Shared reference for simultaneous 16-bit SAR ADC and R-2R DAC in isolated signal chain. Use Value: Matched line/load regulation (0.01%/V, 0.008%/mA) ensures <±0.005% gain error across varying field power supplies and load transients. |
| Precision Calibration Standards | Portable Instrumentation |
Use Scenario: Handheld calibrator generating precise 5.000V, 5.120V, and 10.000V outputs for field verification of multimeters. IC Role / Device Role / Timing Role: Adjustable reference source with ±6% trim capability and temperature-stable output. Use Value: Laser-trimmed 10ppm/°C drift and long-term stability (100ppm/1000h) meet ANSI/NCSL Z540 calibration lab requirements. | Use Scenario: Battery-powered gas analyzer using thermopile sensors requiring stable bias and ratiometric ADC conversion. IC Role / Device Role / Timing Role: Low-quiescent-current (1.4mA) reference powering sensor excitation and ADC reference simultaneously. Use Value: 8V–40V supply range accommodates buck-boost battery management; SOIC-8 footprint enables compact 2-layer PCB layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5050AIDR | Lower 3ppm/°C drift, higher 3.8mA IQ, fixed 5.0V output (no trim), SOIC-8 | Superior stability for metrology; lacks output adjustability needed for binary-scaled V/F converters | Select when absolute drift performance outweighs trim flexibility and power budget allows +2.4mA increase |
| ADR4550BRZ | 5ppm/°C drift, 1.15mA IQ, 5.0V fixed, SOIC-8, better 0.1Hz–10Hz noise (4µVPP) | Better noise for audio-grade converters; no Temp pin or trim capability | Prefer for ultra-low-noise 24-bit audio ADCs where temperature sensing and field calibration are unnecessary |
Compared with REF02AU/2K5G4, REF5050AIDR offers tighter drift but sacrifices adjustability and adds 2.4mA supply current; ADR4550BRZ improves noise by 6µVPP and reduces drift by 5ppm/°C yet omits both Trim and Temp pins - making REF02AU/2K5G4 uniquely suited for cost-sensitive, field-calibratable industrial instruments requiring dual functionality.
Availability
REF02AU/2K5G4 is available at Aetrix Electronics and suitable for precision calibration standards, portable instrumentation, A/D and D/A converters, and digital voltmeters requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for REF02AU/2K5G4 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic technologies, with over 90 years of innovation in precision analog ICs.
The REF02 product line was designed specifically for high-accuracy, wide-supply industrial and portable instrumentation applications requiring integrated temperature sensing and field-adjustable reference outputs.
FAQ
What is the maximum allowable input voltage for REF02AU/2K5G4?
The absolute maximum input voltage for REF02AU/2K5G4 is +40V DC applied to Pin 2 (VIN). Operation above this rating risks permanent damage. The device is specified for reliable operation from 8V to 33V under standard conditions, with guaranteed performance up to 40V only in transient scenarios per TI's absolute maximum ratings table. Always include input overvoltage clamping in designs where supply transients exceed 33V.
Can REF02AU/2K5G4 be used to generate a precise 5.12V output for 8-bit binary applications?
Yes, REF02AU/2K5G4 can be adjusted to 5.12V using a 10kΩ potentiometer between VOUT (Pin 7) and GND (Pin 4), with its wiper connected to Trim (Pin 6). This achieves ±6% output range (4.7V–5.3V), covering 5.12V with minimal impact on temperature coefficient (<0.7ppm/°C per 100mV shift). The 20mV LSB specification confirms suitability for 8-bit systems requiring exact binary scaling.
Does REF02AU/2K5G4 provide temperature monitoring capability independent of its voltage reference function?
Yes, REF02AU/2K5G4 provides a dedicated temperature-sensing output on Pin 3 (Temp), delivering 630mV at 25°C with a linear 2.1mV/°C coefficient across –55°C to +125°C. This signal is electrically isolated from the VOUT circuitry, allowing concurrent use of the 5V reference and temperature measurement without mutual interference or added error sources.
What is the short-circuit behavior of REF02AU/2K5G4, and how long can it safely sustain output-to-ground faults?
REF02AU/2K5G4 includes internal short-circuit protection and is rated for indefinite output-to-ground or output-to-VIN short-circuit duration without damage. During fault conditions, output current is limited to ~30mA (typical), and power dissipation remains within safe junction temperature limits. No external current-limiting components are required for basic protection in test equipment or probing interfaces.
Is REF02AU/2K5G4 compatible with standard SOIC-8 PCB footprints and reflow profiles?
Yes, REF02AU/2K5G4 uses a JEDEC-standard SOIC-8 (D) package with 1.27mm pitch, 3.9mm body width, and 1.75mm max height. It is qualified for MSL Level-3 moisture sensitivity and supports peak reflow temperatures up to 260°C for 168 hours - fully compatible with IPC/JEDEC J-STD-020-compliant lead-free assembly processes and standard SOIC-8 land patterns.
REF02AU/2K5G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- REF02
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 21 mA
- Tolerance:
- ±0.3%
- Temperature Coefficient:
- 15ppm/°C
- Noise - 0.1Hz to 10Hz:
- 4µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 8V ~ 40V
- Current - Supply:
- 1.4mA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
REF02AU/2K5G4 FAQ
1.How can I place an order for REF02AU/2K5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for REF02AU/2K5G4 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 REF02AU/2K5G4 reliable?
The price and inventory of REF02AU/2K5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF02AU/2K5G4 is usually 5 days.
3.What payment methods are accepted for REF02AU/2K5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF02AU/2K5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF02AU/2K5G4?
REF02AU/2K5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF02AU/2K5G4 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 REF02AU/2K5G4?
For technical support, including REF02AU/2K5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF02AU/2K5G4 requirements.
6.How does Aetrix verify that REF02AU/2K5G4 is sourced from the original manufacturer or authorized distributors?
All REF02AU/2K5G4 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 REF02AU/2K5G4 meets industry standards.
7.What is the process for return or replacement of REF02AU/2K5G4?
All REF02AU/2K5G4 units undergo pre-shipment inspection (PSI). If there is an issue with REF02AU/2K5G4, 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 REF02AU/2K5G4 part is unused and in its original packaging.
Return procedure for REF02AU/2K5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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