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Texas Instruments REF3225AIDBVRG4
- Part No.:
- REF3225AIDBVRG4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SOT-23-6
- Datasheet:
-
REF3225AIDBVRG4.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,166
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Product details
Overview
REF3225AIDBVRG4 from Texas Instruments is a precision 2.5V bandgap voltage reference IC with 0.01% initial accuracy, 4ppm/°C drift (0°C to +125°C), and ±10mA output current capability - designed for high-stability analog signal chains in portable data acquisition and medical instrumentation.
For engineers reviewing the REF3225AIDBVRG4 datasheet, REF3225AIDBVRG4 pinout, REF3225AIDBVRG4 application, or REF3225AIDBVRG4 equivalent, this page delivers verified specifications, SOT23-6 terminal mapping, force-sense architecture implications, and validated alternatives for low-drift, micropower reference design.
Technical Context
The REF3225AIDBVRG4 implements a CMOS-based bandgap core with buffered dual-output architecture: OUT_F delivers regulated 2.5V to the load, while OUT_S enables Kelvin sensing to compensate for trace resistance up to 200mV differential between GND_S and GND_F. Its enable-controlled shutdown draws only 0.1–1µA.
It operates with ultra-low dropout (5mV typical at no load) and maintains stability across capacitive loads without external compensation. The device achieves 33µVPP (0.1–10Hz) noise and 48µVRMS (10Hz–10kHz), with thermal hysteresis of 100ppm (first cycle) and long-term stability of 55ppm over 1000 hours.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V ±0.005 V (±0.2%) - ensures ADC full-scale alignment within 12-bit resolution tolerance |
| Initial Accuracy | ±0.01% - eliminates need for post-manufacturing trimming in factory-calibrated systems |
| Temp Drift (0°C to +125°C) | 4 ppm/°C typ., 7 ppm/°C max - supports <±0.01% total error over industrial temperature range |
| Quiescent Current | 110 µA typ., 145 µA max over temp - enables >10-year battery life in 10µA sleep-cycle sensor nodes |
| Dropout Voltage | 5 mV min. - allows operation from 2.505V supply, critical for single-cell LiFePO₄ or coin-cell systems |
| Output Current | ±10 mA - drives 10kΩ DAC reference inputs or multiple op-amp bias networks simultaneously |
| Noise (0.1–10 Hz) | 33 µVPP - limits quantization uncertainty to <1 LSB in 16-bit SAR ADCs with 2.5V reference span |
Pinout & Package
SOT23-6 (DBV) package: 2.9 mm × 2.8 mm footprint with gull-wing leads; RoHS-compliant, NIPDAU finish, MSL Level-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND_F (Pin 1) | Analog ground reference | Primary return path for internal bandgap core and output buffer; connects to system power ground plane |
| GND_S (Pin 2) | Sense ground input | Provides Kelvin feedback to cancel voltage drop across PCB traces - must tie to load ground near OUT_S |
| ENABLE (Pin 3) | Digital control input | Active-high logic: ≥1.5V enables reference; ≤0.7V places device in 0.1–1µA shutdown mode |
| IN (Pin 4) | Positive supply input | Accepts 2.505V to 5.5V; minimum headroom is 5mV above VOUT under no-load conditions |
| OUT_S (Pin 5) | Sense output | Feedback node for remote sensing - connects directly to load-side ground to enable 4-wire regulation |
| OUT_F (Pin 6) | Main output | Delivers regulated 2.5V to load; buffered to maintain accuracy under ±10mA sourcing/sinking |
Key Features
| Feature | Design Value |
|---|---|
| Force-sense output architecture | Compensates for up to 200mV IR drop in PCB traces, enabling accurate 2.5V delivery at remote ADC reference pins |
| Ultra-low dropout (5mV) | Permits direct regulation from low-voltage sources like single LiFePO₄ cells (2.8–3.6V) without LDO pre-regulation |
| Stable with any capacitive load | Eliminates need for external compensation capacitors - simplifies layout and reduces BOM count in space-constrained designs |
| 110µA quiescent current | Supports always-on precision monitoring in energy-harvesting systems where average current budget is <100µA |
| –40°C to +125°C operation | Qualified for automotive under-hood, industrial motor control, and downhole instrumentation environments |
Applications
| Portable Data Acquisition | Medical Patient Monitoring |
|---|---|
|
Use Scenario: Handheld multimeter or IoT edge sensor acquiring 16-bit ADC samples on battery power. IC Role / Device Role / Timing Role: Primary 2.5V reference for SAR ADC and analog front-end gain stages. Use Value: 4ppm/°C drift and 33µVPP noise ensure <±0.005% measurement repeatability across temperature and time. |
Use Scenario: Wearable ECG module requiring stable baseline during multi-hour continuous recording. IC Role / Device Role / Timing Role: Precision reference for instrumentation amplifier and anti-alias filter cutoff setting. Use Value: Force-sense architecture maintains 2.5V accuracy at electrode interface despite flex-cable resistance variation. |
| Automated Test Equipment | Industrial Process Control |
|
Use Scenario: Benchtop DMM calibrator generating programmable reference voltages via DAC feedback loop. IC Role / Device Role / Timing Role: Low-noise, low-drift reference for closed-loop DAC output correction. Use Value: ±10mA drive capability supports simultaneous excitation of multiple DUT reference inputs without gain error. |
Use Scenario: PLC analog input module measuring 4–20mA transmitters in factory-floor cabinets. IC Role / Device Role / Timing Role: Stable reference for 24-bit ΣΔ ADC converting isolated current loops. Use Value: 55ppm long-term stability over 1000h minimizes recalibration frequency in unattended production lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3425BRJZ-R7 | 2.5V, ±0.1% initial accuracy, 10ppm/°C drift (−40°C to +125°C), 4.5µA quiescent current, SOT23-5 | Lacks force-sense outputs and shutdown control; lower drive (±5mA); higher drift limits measurement repeatability in wide-temp environments | Choose when ultra-low IQ dominates over drift and remote sensing needs - e.g., passive sensor nodes with infrequent reads |
| MAX6025AEUR+T | 2.5V, ±0.02% initial accuracy, 5ppm/°C drift (−40°C to +125°C), 65µA IQ, SOT23-5, no ENABLE or sense pins | No enable/shutdown or Kelvin sensing; limited output current (±2mA); requires external decoupling for stability | Prefer for cost-sensitive, fixed-supply applications where 2mA load suffices and board space is constrained |
Compared with ADR3425BRJZ-R7 and MAX6025AEUR+T, REF3225AIDBVRG4 uniquely combines force-sense regulation, 0.01% accuracy, and 4ppm/°C drift in a 6-pin SOT23 - making it the only option supporting high-precision, remote-sensed, battery-operated measurement systems without layout compromises.
Availability
REF3225AIDBVRG4 is available at Aetrix Electronics and suitable for portable instrumentation, medical diagnostics, and industrial process control requiring stable component supply with guaranteed long-term availability and TI-authorized traceability.
Supply support for REF3225AIDBVRG4 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 delivering analog and embedded processing solutions, with over 50 years of precision reference design heritage and ISO 9001-certified manufacturing.
The REF32xx family was engineered specifically for micropower, low-drift voltage references in battery-powered and thermally demanding applications - emphasizing force-sense accuracy, ultra-low dropout, and extended temperature reliability.
FAQ
What is the maximum allowable voltage difference between GND_S and GND_F on REF3225AIDBVRG4?
The REF3225AIDBVRG4 datasheet specifies that the differential voltage between GND_S and GND_F must remain below 200mV to prevent unintended conduction of internal ESD protection diodes. Exceeding this limit risks output inaccuracy and potential latch-up. This constraint directly defines the maximum acceptable IR drop in the sense-path PCB trace - typically limiting trace length to <5 cm on 10-mil copper for 20mA sense currents.
Can REF3225AIDBVRG4 operate with an input voltage equal to its 2.5V output?
No - REF3225AIDBVRG4 requires a minimum input-to-output differential of 5mV under no-load conditions, meaning VIN must be ≥2.505V. At full ±10mA load, dropout rises to 50mV (max), requiring VIN ≥2.55V. Attempting operation at exactly 2.5V will cause regulation failure and output collapse, as confirmed by Figure 5-4's dropout vs. load current curves.
Does REF3225AIDBVRG4 require an output capacitor for stability?
No - REF3225AIDBVRG4 is explicitly characterized as stable with any capacitive load, including 0pF. The internal compensation eliminates need for external output capacitors, unlike many older references. This is validated in Section 7.1 and Figure 7-1, where only a 0.47µF input bypass capacitor is recommended.
How does the ENABLE pin function during power-up with slow-rising supplies?
For input voltage rise times >2ms, the ENABLE pin must be held <0.7V until VIN reaches minimum operating voltage (2.505V). Direct tying of IN and ENABLE is only safe if rise time ≤2ms - otherwise, premature enable causes temporary overcurrent. TI recommends RC filtering (e.g., 150kΩ + 100nF for REF3240) to delay ENABLE activation, with REF3225 requiring ~0.7ms delay per Table 6-2.
What is the long-term stability specification for REF3225AIDBVRG4, and how is it measured?
REF3225AIDBVRG4 exhibits 55ppm typical long-term stability over 1000 hours, measured across 32 units per Figure 5-19. This parameter reflects gradual semiconductor aging effects - not thermal hysteresis or calibration drift - and is characterized under constant +25°C bias, providing a realistic projection for field reliability in continuously powered systems.
REF3225AIDBVRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SOT-23-6
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 20ppm/°C
- Noise - 0.1Hz to 10Hz:
- 33µVp-p
- Noise - 10Hz to 10kHz:
- 48µVrms
- Voltage - Input:
- 2.55V ~ 5.5V
- Current - Supply:
- 135µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
REF3225AIDBVRG4 FAQ
1.How can I place an order for REF3225AIDBVRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for REF3225AIDBVRG4 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 REF3225AIDBVRG4 reliable?
The price and inventory of REF3225AIDBVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF3225AIDBVRG4 is usually 5 days.
3.What payment methods are accepted for REF3225AIDBVRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF3225AIDBVRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF3225AIDBVRG4?
REF3225AIDBVRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF3225AIDBVRG4 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 REF3225AIDBVRG4?
For technical support, including REF3225AIDBVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF3225AIDBVRG4 requirements.
6.How does Aetrix verify that REF3225AIDBVRG4 is sourced from the original manufacturer or authorized distributors?
All REF3225AIDBVRG4 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 REF3225AIDBVRG4 meets industry standards.
7.What is the process for return or replacement of REF3225AIDBVRG4?
All REF3225AIDBVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with REF3225AIDBVRG4, 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 REF3225AIDBVRG4 part is unused and in its original packaging.
Return procedure for REF3225AIDBVRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF3225AIDBVRG4 Tags
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TL431AIDBZR
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