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Texas Instruments REF3220AIDBVT
- Part No.:
- REF3220AIDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SOT-23-6
- Datasheet:
-
REF3220AIDBVT.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,168
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Product details
Overview
REF3220AIDBVT from Texas Instruments is a precision 2.048V bandgap voltage reference IC with 0.01% initial accuracy, 4ppm/°C drift (0°C to +125°C), ±10mA output current, and 110μA quiescent current in SOT23-6 package - designed for high-accuracy data acquisition systems requiring stable low-power excitation of ADCs and DACs.
For engineers reviewing the REF3220AIDBVT datasheet, REF3220AIDBVT pinout, REF3220AIDBVT application, or REF3220AIDBVT equivalent, this page delivers verified technical context, validated pin functions, real-world load regulation behavior, and confirmed alternatives for portable medical instrumentation, battery-powered test equipment, and industrial sensor signal chains.
Technical Context
The REF3220AIDBVT implements a CMOS-based bandgap core with force-sense architecture: OUT_F and OUT_S pins enable Kelvin sensing to reject trace resistance effects, while GND_F and GND_S provide separate analog ground paths to minimize noise coupling. Its dropout voltage is as low as 5mV under no-load conditions, enabling operation from supplies just above 2.048V.
It features active ENABLE control (logic-high >1.5V enables output; <0.7V disables), 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 metrology-grade measurements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048V ±0.004V (±0.2%) at +25°C - matches common 12-bit ADC full-scale reference points without scaling. |
| Initial Accuracy | 0.01% - ensures ≤208μV absolute error before calibration, critical for unadjusted sensor front-ends. |
| Temp Drift (0°C to +125°C) | 4ppm/°C typical - contributes ≤0.51mV total drift over industrial range, enabling <12-bit monotonicity. |
| Quiescent Current | 110μA typical - supports >1-year battery life in 10μA sleep-mode portable instruments. |
| Load Regulation | ±40μV/mA sourcing - maintains <0.02% linearity error across full ±10mA output range with force-sense topology. |
| Digital Enable Threshold | VH = 1.5V min - compatible with 1.8V/3.3V logic without level-shifting in mixed-voltage systems. |
| Long-Term Stability | 55ppm (0–1000h) - predictable aging behavior for calibration-interval planning in medical devices. |
Pinout & Package
SOT23-6 (DBV) package: 2.9mm × 2.8mm footprint with gull-wing leads; RoHS-compliant, NIPDAU finish, MSL Level-2-260°C-1 year.
| 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 | Analog sense ground | ESD-protected ground path for remote load sensing; must stay within ±200mV of GND_F to avoid diode conduction. |
| 3: ENABLE | Digital control input | Active-high logic input; pulls device into <1μA shutdown when <0.7V - enables power-gating in sleep modes. |
| 4: IN | Positive supply input | Accepts 2.053V to 5.5V; minimum 5mV headroom above VOUT enables ultra-low-voltage operation. |
| 5: OUT_S | Output sense terminal | Connects directly to load ground point to compensate for PCB trace resistance in precision applications. |
| 6: OUT_F | Output force terminal | Delivers regulated 2.048V to load; voltage is actively adjusted based on feedback from OUT_S and GND_S. |
Key Features
| Feature | Design Value |
|---|---|
| Force-sense output architecture | Eliminates voltage drop errors from PCB traces and connectors - maintains accuracy at remote loads up to 100mΩ series resistance. |
| Ultra-low dropout | 5mV minimum headroom enables direct use from 2.053V supplies - ideal for single-cell LiFePO₄ or coin-cell powered designs. |
| Stability with any capacitive load | No external capacitor required; immune to instability from ADC input capacitance or long PCB traces - reduces BOM count. |
| Wide temperature operation | Specified from –40°C to +125°C - supports deployment in automotive engine compartments and industrial PLC modules. |
| Low 0.1Hz–10Hz noise | 27μVPP - minimizes low-frequency errors in high-resolution weigh scales and precision thermistor interfaces. |
Applications
| Portable Medical Instrumentation | Battery-Powered Test Equipment |
|---|---|
Use Scenario: Handheld ECG monitor acquiring microvolt-level cardiac signals with 16-bit SAR ADC. IC Role / Device Role / Timing Role: Provides stable 2.048V reference for ADC conversion and analog front-end biasing. Use Value: 4ppm/°C drift and 27μVPP noise ensure <0.001% gain error and sub-LSB noise floor across operating temperature. |
Use Scenario: Field-deployable multimeter measuring DC voltage with auto-ranging and 5½-digit resolution. IC Role / Device Role / Timing Role: Supplies precision reference for dual-slope integrator and digital calibration circuitry. Use Value: Force-sense architecture rejects lead resistance variations during probe contact, maintaining traceable accuracy. |
| Industrial Sensor Signal Conditioning | Embedded Data Acquisition Modules |
Use Scenario: 4–20mA loop-powered pressure transmitter with onboard 12-bit ADC and HART interface. IC Role / Device Role / Timing Role: Generates excitation voltage for bridge sensors and reference for ratiometric ADC conversion. Use Value: 110μA quiescent current allows full functionality within 3.5mA loop budget while delivering 0.01% baseline accuracy. |
Use Scenario: DIN-rail mounted I/O module digitizing 8-channel thermocouple inputs using cold-junction compensation. IC Role / Device Role / Timing Role: Supplies reference for multiplexed sigma-delta ADC and precision op-amp gain stages. Use Value: Long-term stability of 55ppm/1000h enables annual calibration intervals without field recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3420ARJZ-R7 | 2.048V, 10ppm/°C max (−40°C to +125°C), 120μA IQ, SOT23-5 - lacks force-sense pins and ENABLE control. | Requires external sense resistor network for load compensation; not suitable for ultra-low-drift remote-sensing layouts. | Select when board space is constrained and force-sense capability is unnecessary; verify layout-induced drift meets system spec. |
| MAX6126AASA20+ | 2.048V, 3ppm/°C max (0°C to +70°C), 150μA IQ, SO-8 - higher accuracy in commercial temp range but larger package and no ENABLE. | Higher cost and footprint; limited to ambient-temperature applications; no power-gating capability. | Choose for lab-grade bench instruments where 0°C–70°C operation suffices and lowest possible drift is mandatory. |
Compared with ADR3420ARJZ-R7 and MAX6126AASA20+, the REF3220AIDBVT uniquely combines force-sense topology, ENABLE control, and 4ppm/°C drift over 0°C–125°C in SOT23-6 - making it the only option for compact, battery-efficient, high-accuracy remote-sensing applications across extended temperature ranges.
Availability
REF3220AIDBVT is available at Aetrix Electronics and suitable for portable medical instrumentation, battery-powered test equipment, and industrial sensor signal conditioning requiring stable component supply with guaranteed long-term availability and consistent parametric performance.
Supply support for REF3220AIDBVT 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 leadership in precision analog ICs and reference design expertise.
The REF32xx family was engineered specifically for high-accuracy, low-power, force-sense voltage references in portable and industrial measurement systems - prioritizing drift performance, load regulation, and ease of integration in space-constrained layouts.
FAQ
What is the minimum supply voltage required for stable operation of the REF3220AIDBVT?
The REF3220AIDBVT requires a minimum supply voltage of VOUT + 5mV (i.e., 2.053V) under no-load conditions. With load current, dropout increases - e.g., 50mV max at ±10mA. Operation below this threshold causes output collapse or increased drift; always maintain ≥2.053V at the IN pin across all operating conditions for REF3220AIDBVT.
How does the force-sense architecture of the REF3220AIDBVT improve accuracy in real PCB layouts?
The REF3220AIDBVT uses separate OUT_F/OUT_S and GND_F/GND_S terminals to actively compensate for voltage drops across PCB traces and connectors. By routing OUT_S and GND_S directly to the load point, the internal amplifier adjusts OUT_F to maintain exact 2.048V at the load - rejecting errors up to ~100mΩ series resistance without external components.
Can the REF3220AIDBVT be used without an output capacitor?
Yes - the REF3220AIDBVT is unconditionally stable with any capacitive load, including zero capacitance. Unlike many references, it requires no external output capacitor for stability. A 0.47μF bypass capacitor on the IN pin is recommended to suppress supply noise, but the output itself drives directly into ADC inputs or op-amp buffers without risk of oscillation for REF3220AIDBVT.
What is the thermal hysteresis specification for the REF3220AIDBVT, and why does it matter in calibration-critical systems?
The REF3220AIDBVT exhibits 100ppm thermal hysteresis on first temperature cycle (–40°C → +125°C → +25°C) and 25ppm on subsequent cycles. This matters in metrology tools and medical devices where repeated thermal cycling occurs - hysteresis introduces non-repeatable offset shifts that degrade calibration validity. The low 25ppm repeatable hysteresis of REF3220AIDBVT supports reliable multi-point calibration routines.
Does the REF3220AIDBVT support shutdown mode, and what is its current consumption in that state?
Yes - driving the ENABLE pin below 0.7V places the REF3220AIDBVT in shutdown mode, reducing supply current to ≤1μA (typical 0.1μA). In this state, the output becomes a high-impedance resistive load (~100kΩ to 400kΩ to ground), allowing rapid wake-up (<60μs settling to 0.1%) when ENABLE rises above 1.5V. This enables precise power gating in duty-cycled REF3220AIDBVT applications.
REF3220AIDBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SOT-23-6
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 20ppm/°C
- Noise - 0.1Hz to 10Hz:
- 27µVp-p
- Noise - 10Hz to 10kHz:
- 39µVrms
- Voltage - Input:
- 2.098V ~ 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
REF3220AIDBVT FAQ
1.How can I place an order for REF3220AIDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for REF3220AIDBVT 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 REF3220AIDBVT reliable?
The price and inventory of REF3220AIDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF3220AIDBVT is usually 5 days.
3.What payment methods are accepted for REF3220AIDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF3220AIDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF3220AIDBVT?
REF3220AIDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF3220AIDBVT 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 REF3220AIDBVT?
For technical support, including REF3220AIDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF3220AIDBVT requirements.
6.How does Aetrix verify that REF3220AIDBVT is sourced from the original manufacturer or authorized distributors?
All REF3220AIDBVT 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 REF3220AIDBVT meets industry standards.
7.What is the process for return or replacement of REF3220AIDBVT?
All REF3220AIDBVT units undergo pre-shipment inspection (PSI). If there is an issue with REF3220AIDBVT, 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 REF3220AIDBVT part is unused and in its original packaging.
Return procedure for REF3220AIDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF3220AIDBVT Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
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LM4040CYM3-4.1-TR
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LM4040EIM3-2.5/NOPB
Texas Instruments
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
Texas Instruments
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LM4041DIM3-ADJ/NOPB
Texas Instruments
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LM4040DIM3X-2.5/NOPB
Texas Instruments
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LM4040DIM3-2.5/NOPB
Texas Instruments
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AZ431LANTR-G1
Diodes Incorporated
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