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Texas Instruments REF3233AIDBVT
- Part No.:
- REF3233AIDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SOT-23-6
- Datasheet:
-
REF3233AIDBVT.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:850
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Product details
Overview
REF3233AIDBVT from Texas Instruments is a precision 3.3V series voltage reference IC with 4ppm/°C max drift (0°C to +125°C), ±10mA output current, 0.01% initial accuracy, and 110μA quiescent current - designed for high-accuracy data acquisition and portable medical instrumentation requiring stable low-power biasing.
For engineers reviewing the REF3233AIDBVT datasheet, REF3233AIDBVT pinout, REF3233AIDBVT application, or REF3233AIDBVT equivalent, this page delivers verified specifications, SOT23-6 terminal mapping, force-sense architecture implications, and validated alternatives for battery-powered and industrial-grade analog signal chains.
Technical Context
The REF3233AIDBVT implements a CMOS band-gap core with buffered dual-output architecture: OUT_F delivers regulated 3.3V to the load, while OUT_S enables remote sensing to compensate for trace resistance up to 200mV differential between GND_S and GND_F. Its low-dropout operation (5mV min) allows use with supply voltages as low as 3.305V under no-load conditions.
It features active enable control (EN pin threshold: 1.5V min for activation), shutdown current <1μA, and stability with any capacitive load - eliminating need for external compensation. Thermal hysteresis is specified at 100ppm (first cycle) and 25ppm (subsequent cycles), supporting repeatable calibration in cyclic temperature environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V nominal, ±7mV tolerance (3.293–3.307V) at +25°C - ensures ADC full-scale alignment within 0.2% error margin. |
| Temp Drift (0°C to +125°C) | 4ppm/°C typical / 7ppm/°C max - contributes ≤0.88mV total drift over range, critical for 16-bit+ system accuracy. |
| Initial Accuracy | ±0.01% (±330μV) - supports sub-12-bit absolute accuracy without trimming in production systems. |
| Quiescent Current | 110μA typical / 130μA max - enables >1-year battery life in 10μA-average-power portable devices. |
| Dropout Voltage | 5mV min (unloaded), ≤50mV max (full load) - permits direct regulation from single-cell Li-ion or 3.3V LDO outputs. |
| Load Current | ±10mA sourcing/sinking - drives SAR ADC references, op-amp bias networks, and multiplexer VREF inputs directly. |
| Noise (0.1–10Hz) | 43μVPP - limits effective resolution to ~19.5 bits in low-frequency precision measurement front-ends. |
Pinout & Package
SOT23-6 (DBV) package: 2.9mm × 2.8mm footprint with gull-wing leads; thermal resistance θJA = 200°C/W; RoHS-compliant NiPdAu lead finish; MSL Level-2 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: GND_F | Analog ground reference | Primary ground return for internal bandgap and buffer - connects to system power ground plane. |
| 2: GND_S | Sense ground input | Provides feedback path for remote sensing; must be tied to load ground within 200mV of GND_F to avoid ESD diode conduction. |
| 3: ENABLE | Digital enable input | Active-high logic control: ≥1.5V enables reference; ≤0.7V places device in shutdown (<1μA IQ). |
| 4: IN | Positive supply input | Accepts 3.305V–5.5V; dropout as low as 5mV enables ultra-low-headroom operation. |
| 5: OUT_S | Sense output connection | Connects to load-side ground to close force-sense loop - eliminates voltage drop errors in PCB traces. |
| 6: OUT_F | Regulated output | Delivers stable 3.3V to load; internally buffered to drive ±10mA with minimal line/load regulation error. |
Key Features
| Feature | Design Value |
|---|---|
| Force-sense output architecture | Compensates for up to 200mV IR drop in PCB traces and connectors - maintains 3.3V accuracy at point-of-load. |
| Ultra-low dropout | 5mV minimum enables operation from 3.305V supplies - ideal for post-LDO or single-cell battery systems. |
| Stability with any capacitive load | No external capacitor required; eliminates risk of oscillation with ADC input capacitance or long PCB traces. |
| Low thermal hysteresis | 25ppm after first thermal cycle - ensures repeatable calibration across temperature cycling in test equipment. |
| Shutdown mode | Reduces quiescent current to <1μA - extends battery life in intermittent-sampling portable instruments. |
Applications
| Portable Medical Sensors | Data Acquisition Systems |
|---|---|
Use Scenario: Battery-powered ECG front-end with 24-bit delta-sigma ADC requiring stable reference over 0–45°C operating range. IC Role / Device Role / Timing Role: Primary 3.3V reference for ADC VREF, enabling ratiometric measurement against sensor bridge output. Use Value: 4ppm/°C drift and 43μVPP noise preserve diagnostic-grade signal integrity without recalibration. |
Use Scenario: Industrial PLC analog input module digitizing 4–20mA loops with 16-bit SAR ADC. IC Role / Device Role / Timing Role: Precision reference for ADC and programmable gain amplifier biasing in multi-channel acquisition. Use Value: Force-sense architecture maintains 3.3V accuracy at ADC input despite 50mΩ PCB trace resistance. |
| Handheld Test Equipment | Medical Imaging Subsystems |
Use Scenario: Portable multimeter with auto-ranging and 5½-digit display requiring stable reference during battery voltage sag. IC Role / Device Role / Timing Role: Reference source for internal DAC-based calibration and ADC reference switching. Use Value: 5mV dropout allows uninterrupted operation down to 3.305V supply - extends usable battery range by 12%. |
Use Scenario: Ultrasound beamformer ASIC requiring low-noise, low-drift reference for time-of-flight timing circuits. IC Role / Device Role / Timing Role: Bias reference for high-speed comparators and delay-locked loops in analog front-end. Use Value: 110μA quiescent current and ±10mA drive capability support low-power, high-channel-count architectures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3433ARJZ-R7 | 3.3V, 3ppm/°C max drift (−40°C to +125°C), 120μA IQ, SOT23-5 (no sense pins) | Lacks force-sense architecture; requires careful layout to minimize trace IR error | Select when board space is constrained and trace resistance <10mΩ; verify load regulation impact. |
| MAX6126AASA33+ | 3.3V, 3ppm/°C max drift, 125μA IQ, SO-8 package, no enable pin | No shutdown mode; larger footprint; higher thermal resistance (θJA = 220°C/W) | Prefer for fixed-power systems where continuous operation and lowest drift outweigh size/power trade-offs. |
Compared with REF3233AIDBVT, ADR3433ARJZ-R7 offers lower drift but sacrifices force-sense accuracy compensation, while MAX6126AASA33+ provides superior drift performance at the cost of shutdown capability and compactness - making REF3233AIDBVT optimal for portable, layout-sensitive, and power-gated applications.
Availability
REF3233AIDBVT is available at Aetrix Electronics and suitable for portable medical sensors, industrial data acquisition systems, handheld test equipment, and medical imaging subsystems requiring stable component supply with guaranteed long-term continuity.
Supply support for REF3233AIDBVT 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 and embedded processing technologies, with decades of expertise in precision analog IC design and manufacturing.
The REF32xx family was engineered specifically for high-accuracy, low-power, force-sense voltage referencing in portable, medical, and industrial measurement systems - prioritizing drift, noise, and layout robustness over cost or integration density.
FAQ
What is the minimum supply voltage required for stable operation of REF3233AIDBVT?
The REF3233AIDBVT operates with a minimum supply voltage of 3.305V (VOUT + 5mV) under no-load conditions. At full ±10mA load, dropout rises to ≤50mV, requiring ≥3.35V supply. This ultra-low dropout enables direct use with single-cell Li-ion batteries or low-headroom LDOs in portable designs.
How does the force-sense architecture of REF3233AIDBVT improve accuracy in real-world PCB layouts?
The REF3233AIDBVT uses separate OUT_F and OUT_S pins with dedicated GND_F and GND_S terminals to implement a 4-wire Kelvin sense configuration. By routing OUT_S and GND_S directly to the load ground, the device actively compensates for voltage drop across PCB traces and connectors - maintaining true 3.3V at the load even with up to 200mV differential between sense and power grounds.
Can REF3233AIDBVT drive a 10μF capacitive load without instability?
Yes - the REF3233AIDBVT is explicitly characterized as stable with "any capacitive load" per its datasheet. Unlike many references requiring minimum ESR or specific capacitor types, it employs an internal compensation scheme that prevents peaking or oscillation regardless of output capacitance value or dielectric type, simplifying design for ADC decoupling and filtering.
What is the thermal hysteresis specification for REF3233AIDBVT, and why does it matter in calibration-critical systems?
The REF3233AIDBVT exhibits 100ppm thermal hysteresis on the first temperature cycle (−40°C → +125°C → +25°C) and 25ppm on subsequent cycles. This matters in metrology and calibration equipment where repeated thermal cycling must not introduce cumulative offset shifts - the low post-cycle hysteresis ensures repeatability after environmental stress.
Does REF3233AIDBVT require an external bypass capacitor, and if so, what value is recommended?
A 0.47μF ceramic bypass capacitor is recommended between IN and GND_F per TI's typical application circuit. While the REF3233AIDBVT remains stable without it, this capacitor suppresses supply noise and improves PSRR above 10kHz - particularly important in mixed-signal systems sharing noisy digital rails with precision analog sections.
REF3233AIDBVT 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):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 20ppm/°C
- Noise - 0.1Hz to 10Hz:
- 43µVp-p
- Noise - 10Hz to 10kHz:
- 63µVrms
- Voltage - Input:
- 3.35V ~ 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
REF3233AIDBVT FAQ
1.How can I place an order for REF3233AIDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for REF3233AIDBVT 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 REF3233AIDBVT reliable?
The price and inventory of REF3233AIDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF3233AIDBVT is usually 5 days.
3.What payment methods are accepted for REF3233AIDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF3233AIDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF3233AIDBVT?
REF3233AIDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF3233AIDBVT 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 REF3233AIDBVT?
For technical support, including REF3233AIDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF3233AIDBVT requirements.
6.How does Aetrix verify that REF3233AIDBVT is sourced from the original manufacturer or authorized distributors?
All REF3233AIDBVT 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 REF3233AIDBVT meets industry standards.
7.What is the process for return or replacement of REF3233AIDBVT?
All REF3233AIDBVT units undergo pre-shipment inspection (PSI). If there is an issue with REF3233AIDBVT, 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 REF3233AIDBVT part is unused and in its original packaging.
Return procedure for REF3233AIDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF3233AIDBVT Tags
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