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Texas Instruments REF3230AIDBVT
- Part No.:
- REF3230AIDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SOT-23-6
- Datasheet:
-
REF3230AIDBVT.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,056
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Product details
Overview
REF3230AIDBVT from Texas Instruments is a precision 3.0V bandgap voltage reference IC with 0.01% initial accuracy, 4ppm/°C drift (0°C to +125°C), ±10mA output current capability, and 110μA quiescent current - deployed in high-accuracy data acquisition systems requiring stable excitation for 16-bit ADCs and low-power portable instrumentation.
For engineers reviewing the REF3230AIDBVT datasheet, REF3230AIDBVT pinout, REF3230AIDBVT application, or REF3230AIDBVT equivalent, key selection criteria include force-sense output architecture for load regulation compensation, SOT23-6 microsize packaging, dropout as low as 5mV, thermal hysteresis of 100ppm (first cycle), and guaranteed operation across –40°C to +125°C.
Technical Context
The REF3230AIDBVT implements a CMOS-based bandgap core with buffered force-sense outputs (OUT_F/OUT_S) and independent ground sense (GND_S), enabling precise remote voltage regulation at the load by compensating for trace resistance. Its ENABLE pin provides digital shutdown control with <1μA standby current.
It operates down to VIN = VOUT + 5mV under no-load conditions and maintains stability with any capacitive load - eliminating need for external compensation. The device achieves 39µVPP (0.1Hz–10Hz) noise and 57µVRMS (10Hz–10kHz) at 3.0V output, with PSRR >60dB up to 10kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.000V ±0.006V (0.2% total error budget over temperature and load) |
| Initial Accuracy | ±0.01% - enables direct use in 16-bit SAR ADC reference without trimming |
| Temp Drift (0°C to +125°C) | 4ppm/°C typ / 7ppm/°C max - ensures ≤0.25mV output shift across primary industrial range |
| Dropout Voltage | 5mV min - supports operation from ultra-low headroom supplies (e.g., single-cell LiFePO₄) |
| Quiescent Current | 110μA typ / 145μA max over temp - extends battery life in portable medical sensors |
| Output Current | ±10mA - drives ADC reference inputs, op-amp bias networks, and small DACs directly |
| Noise (0.1Hz–10Hz) | 39µVPP - contributes <0.0013% RMS error in 16-bit (±3.0V full-scale) systems |
Pinout & Package
SOT23-6 (DBV) package: 2.9mm × 2.8mm footprint, 1.45mm height, lead-free NiPdAu finish, MSL Level-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: GND_F | Analog ground reference | Return path for internal bandgap and buffer circuits; connects to system power ground |
| 2: GND_S | Ground sense input | Monitors load-side ground potential; must stay within ±200mV of GND_F to avoid ESD diode conduction |
| 3: ENABLE | Digital enable input | Active-high logic control: <0.7V = shutdown (<1μA), >1.5V = active; compatible with 1.8V/3.3V GPIO |
| 4: IN | Positive supply input | Accepts 3.005V to 5.5V; minimum 5mV headroom above VOUT required for regulation |
| 5: OUT_S | Output sense input | Remote sense connection at load; enables Kelvin-force regulation to cancel IR drop in PCB traces |
| 6: OUT_F | Regulated output driver | High-current buffered output (±10mA); tracks OUT_S voltage with <40µV/mA load regulation error |
Key Features
| Feature | Design Value |
|---|---|
| Force-sense output architecture | Compensates for up to 100mΩ trace resistance between REF3230AIDBVT and load, maintaining ±0.01% accuracy at point-of-use |
| Ultra-low dropout | 5mV minimum headroom enables use with 3.05V supplies - critical for energy-harvesting and coin-cell applications |
| Low 0.1Hz–10Hz noise | 39µVPP supports high-resolution DC measurements in weigh scales and precision thermometry |
| Wide temperature operation | Specified from –40°C to +125°C with 10.5ppm/°C max drift ensures reliability in automotive engine control modules |
| Digital enable with low IQ | Shuts down to <1μA while preserving output impedance - ideal for duty-cycled sensor nodes in IoT edge devices |
Applications
| Portable Medical Sensors | Data Acquisition Systems |
|---|---|
|
Use Scenario: Battery-powered handheld blood glucose meters requiring stable 3.0V reference for 16-bit ADC conversion of electrochemical sensor signals. IC Role / Device Role / Timing Role: Precision voltage reference providing excitation and scaling for analog front-end; force-sense pins compensate for flex-cable resistance. Use Value: Enables ±0.5% glucose measurement accuracy over 0°C–45°C operating range with no calibration drift compensation needed. |
Use Scenario: Industrial PLC analog input modules digitizing 4–20mA current loops using 3.0V-referenced 18-bit sigma-delta ADCs. IC Role / Device Role / Timing Role: Primary reference source for ADC and programmable gain amplifier; OUT_S connected directly at ADC REF+ pin. Use Value: Eliminates need for external Kelvin wiring; maintains 15.5-bit effective resolution despite 50mΩ PCB trace resistance. |
| Test & Measurement Equipment | Automotive Engine Control Units |
|
Use Scenario: Benchtop multimeters performing DC voltage measurements with 0.005% basic accuracy specification. IC Role / Device Role / Timing Role: Master reference for auto-ranging attenuator and ADC subsystem; enabled only during measurement cycles. Use Value: 110μA quiescent current and 60µs turn-on settling allow fast wake-up from sleep mode without reference stabilization delay. |
Use Scenario: Under-hood oxygen sensor signal conditioning in gasoline direct injection engines, exposed to –40°C cold cranking and +125°C under-hood ambient. IC Role / Device Role / Timing Role: Stable 3.0V bias for wideband op-amps amplifying zirconia sensor output; operates continuously during engine runtime. Use Value: 7ppm/°C max drift over 0°C–125°C ensures <1 LSB error in 12-bit ECU ADC across full thermal envelope. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3430ARJZ-R7 | 3.0V output, 10ppm/°C max drift (−40°C to +125°C), 4.5μA quiescent current, SOT23-5 (no sense pins) | Lacks force-sense architecture; requires local regulation only; lower power but higher thermal drift | Select when board space is constrained and trace resistance <10mΩ; not suitable for remote sensing. |
| MAX6126AUT30+ | 3.0V output, 3ppm/°C max drift (0°C to +70°C), 950μA quiescent current, SOT23-6 (no ENABLE) | Higher IQ, no shutdown, tighter drift only over commercial temp range; no sense capability | Choose for lab-grade instruments needing lowest drift at room temperature; unsuitable for battery operation. |
Compared with ADR3430ARJZ-R7 and MAX6126AUT30+, REF3230AIDBVT uniquely combines force-sense regulation, ultra-low dropout (5mV), and industrial temperature drift spec (7ppm/°C) in a 110μA solution - making it optimal for embedded systems where accuracy must be maintained at the load point under varying thermal and supply conditions.
Availability
REF3230AIDBVT is available at Aetrix Electronics and suitable for portable medical sensors, industrial data acquisition systems, and automotive engine control units requiring stable component supply with guaranteed long-term availability and consistent parametric performance.
Supply support for REF3230AIDBVT 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The REF32xx family was designed specifically for high-accuracy, low-power, force-sense voltage reference applications in portable instrumentation, precision data converters, and harsh-environment control systems.
FAQ
What is the minimum supply voltage required for stable operation of the REF3230AIDBVT?
The REF3230AIDBVT requires a minimum supply voltage of VOUT + 5mV = 3.005V under no-load conditions. With 10mA load, typical dropout rises to 50mV, so VIN ≥ 3.05V is recommended for full output current capability. Operation below this threshold causes loss of regulation and increased output error.
How does the force-sense architecture of the REF3230AIDBVT improve accuracy in real-world PCB layouts?
The REF3230AIDBVT uses separate OUT_F (force) and OUT_S (sense) pins to regulate voltage precisely at the load. By routing OUT_S directly to the ADC reference input, the device compensates for voltage drop across PCB traces - maintaining ±0.01% accuracy even with 50mΩ series resistance, which would otherwise cause 0.5mV error at 10mA.
Can the REF3230AIDBVT be used with capacitive loads, and is an output capacitor required?
Yes, the REF3230AIDBVT is unconditionally stable with any capacitive load and does not require an output capacitor. It remains stable from 0pF to >10µF, simplifying layout and eliminating risk of oscillation - unlike many references that demand specific COUT values or ESR ranges.
What is the thermal hysteresis specification for the REF3230AIDBVT, and how does it affect long-term calibration?
The REF3230AIDBVT exhibits 100ppm thermal hysteresis on first temperature cycle (–40°C → +125°C → +25°C), degrading to 25ppm on subsequent cycles. This translates to a maximum 0.3mV offset shift after thermal cycling - acceptable for systems calibrated post-assembly but critical for field-replaceable modules requiring zero recalibration.
Does the REF3230AIDBVT support shutdown mode, and what is its leakage behavior when disabled?
Yes, pulling the ENABLE pin below 0.7V places the REF3230AIDBVT in shutdown mode, reducing supply current to 0.1–1μA. In this state, the OUT_F pin becomes a high-impedance resistive load (~100kΩ to 400kΩ to GND_F), preventing back-driving of downstream circuitry while maintaining fast wake-up (<60µs settling).
REF3230AIDBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SOT-23-6
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 20ppm/°C
- Noise - 0.1Hz to 10Hz:
- 39µVp-p
- Noise - 10Hz to 10kHz:
- 57µVrms
- Voltage - Input:
- 3.05V ~ 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
REF3230AIDBVT FAQ
1.How can I place an order for REF3230AIDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for REF3230AIDBVT 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 REF3230AIDBVT reliable?
The price and inventory of REF3230AIDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF3230AIDBVT is usually 5 days.
3.What payment methods are accepted for REF3230AIDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF3230AIDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF3230AIDBVT?
REF3230AIDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF3230AIDBVT 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 REF3230AIDBVT?
For technical support, including REF3230AIDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF3230AIDBVT requirements.
6.How does Aetrix verify that REF3230AIDBVT is sourced from the original manufacturer or authorized distributors?
All REF3230AIDBVT 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 REF3230AIDBVT meets industry standards.
7.What is the process for return or replacement of REF3230AIDBVT?
All REF3230AIDBVT units undergo pre-shipment inspection (PSI). If there is an issue with REF3230AIDBVT, 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 REF3230AIDBVT part is unused and in its original packaging.
Return procedure for REF3230AIDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF3230AIDBVT Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
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LM4040CYM3-2.5-TR
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LM4040CYM3-4.1-TR
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LM4040EIM3-2.5/NOPB
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AZ431LBNTR-G1
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
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LM4040DIM3X-2.5/NOPB
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LM4040DIM3-2.5/NOPB
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AZ431LANTR-G1
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