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Texas Instruments REF3220AMDBVREP
- Part No.:
- REF3220AMDBVREP
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SOT-23-6
- Datasheet:
-
REF3220AMDBVREP.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,549
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Product details
Overview
REF3220AMDBVREP from Texas Instruments is a precision 2.048 V series voltage reference IC with 0.01% initial accuracy, 4 ppm/°C max drift over 0°C to +125°C, and ±10 mA output drive capability. It operates in SOT23-6 package with force-sense outputs (OUT_F/OUT_S) and enable control, targeting high-accuracy data acquisition systems requiring stable low-drift references.
For engineers reviewing the REF3220AMDBVREP datasheet, REF3220AMDBVREP pinout, REF3220AMDBVREP application, or REF3220AMDBVREP equivalent, key selection criteria include its 5 mV dropout voltage at no load, 100 μA quiescent current, thermal hysteresis of 25 ppm, and support for remote sensing in precision ADC biasing and portable medical instrumentation.
Technical Context
The REF3220AMDBVREP implements a CMOS bandgap topology with dual base-emitter voltage subtraction and resistor-based amplification to achieve temperature-invariant output. Its force-sense architecture separates output (OUT_F) and sense (OUT_S) paths to compensate for PCB trace resistance up to 200 mV differential between GND_S and GND_F.
It features digital enable/disable control (ENABLE pin), shutdown current of 0.1–1 μA, and operates across –55°C to +125°C. The device delivers stable performance with capacitive loads from 1 μF to 47 μF and requires no mandatory output capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V ±0.2% (2.044–2.052 V); enables precise 12-bit DAC/ADC full-scale alignment |
| Initial Accuracy | 0.01% (±0.2 mV); eliminates need for post-manufacture trimming in production calibration |
| Temp Drift (0°C to +125°C) | ≤7 ppm/°C max; contributes ≤0.85 mV total error across industrial temperature range |
| Dropout Voltage | 5 mV min (no load); allows operation from supply as low as 2.053 V, critical for ultra-low-voltage battery systems |
| Quiescent Current | 100 μA typ / 135 μA max (–55°C to +125°C); supports >10-year battery life in always-on sensor nodes |
| Output Current | ±10 mA; drives 100 Ω load directly without external buffer in 16-bit SAR ADC reference circuits |
| Noise (0.1–10 Hz) | 27 μVPP; limits RMS noise contribution to <0.001 LSB in 16-bit, 2.048 V full-scale systems |
Pinout & Package
SOT23-6 package (DBV), 2.9 mm × 1.6 mm × 1.15 mm, moisture sensitivity level 2 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND_F (Pin 1) | Analog ground reference | Primary ground return for internal reference core; connects to system analog ground plane |
| GND_S (Pin 2) | Sense ground input | Monitors ground potential at remote load; must stay within ±200 mV of GND_F to avoid ESD diode conduction |
| ENABLE (Pin 3) | Digital enable input | Active-high logic: ≥1.5 V enables output; ≤0.7 V disables output and reduces IQ to ≤1 μA |
| IN (Pin 4) | Positive supply input | Accepts 2.053 V to 5.5 V; supplies internal bandgap and output stage |
| OUT_S (Pin 5) | Load sense output | Feedback path to regulate voltage precisely at load point; connects directly to ADC VREF+ sense node |
| OUT_F (Pin 6) | Main output terminal | Delivers regulated 2.048 V; used for local decoupling and bypass capacitor connection |
Key Features
| Feature | Design Value |
|---|---|
| Force-sense output architecture | Compensates for up to 200 mV IR drop in PCB traces, ensuring ±0.01% accuracy at load despite layout parasitics |
| Ultra-low dropout (5 mV) | Enables direct use with single-cell LiFePO₄ (2.8–3.6 V) or two-series alkaline batteries without LDO pre-regulation |
| Low 100 μA quiescent current | Reduces self-heating to <0.1°C rise in SOT23-6, minimizing thermally induced drift in sealed enclosures |
| Stable with wide capacitive loads (1–47 μF) | Eliminates need for external compensation networks when driving large ADC input capacitance or filtering caps |
| –55°C to +125°C operation | Qualified for aerospace, defense, and downhole oil/gas instrumentation per enhanced plastic product requirements |
Applications
| Portable Data Logger | Medical ECG Front-End |
|---|---|
Use Scenario: Battery-powered environmental sensor node logging temperature, humidity, and pressure at 1 Hz using 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Provides stable 2.048 V reference for ADC conversion, enabling 16-bit linearity without recalibration across temperature swings. Use Value: 7 ppm/°C drift ensures <0.02% full-scale error over –20°C to +70°C operating range, meeting IEC 60601-1 ambient tolerance. | Use Scenario: Low-noise analog front-end for 3-lead ECG acquisition with 12-bit SAR ADC sampling at 1 kSPS. IC Role / Device Role / Timing Role: Supplies precision reference to ADC and programmable gain amplifier, rejecting supply ripple via 80 dB PSRR at 60 Hz. Use Value: 27 μVPP (0.1–10 Hz) noise contributes <0.0008 LSB RMS noise, preserving microvolt-level ST-segment resolution. |
| Industrial PLC Analog Input Module | Aerospace Avionics Sensor Interface |
Use Scenario: 8-channel 16-bit isolated analog input card for factory automation, accepting ±10 V signals via precision resistive dividers. IC Role / Device Role / Timing Role: Generates calibrated 2.048 V reference for on-board ADC and excitation current sources in RTD/thermocouple circuits. Use Value: Force-sense configuration maintains ±0.005% reference accuracy at ADC input despite 50 mΩ trace resistance, eliminating channel-to-channel gain mismatch. | Use Scenario: High-reliability pressure transducer interface in flight control computers operating from –55°C to +125°C. IC Role / Device Role / Timing Role: Provides radiation-tolerant, long-term stable reference for A/D conversion of engine health sensors. Use Value: 55 ppm long-term stability (1000 h) and controlled baseline manufacturing ensure <0.01% calibration drift over 10-year service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3420RTET | 2.048 V, 0.025% initial accuracy, 3 ppm/°C drift (0°C to +125°C), 1.2 mA IQ, SOT23-6 | Higher accuracy and lower drift but 12× higher quiescent current; unsuitable for battery-powered designs | Select REF3420RTET only when ultimate drift performance outweighs power budget constraints |
| ADR3420ARMZ | 2.048 V, 0.1% initial accuracy, 10 ppm/°C drift (−40°C to +125°C), 120 μA IQ, SOT23-6 | Looser initial spec and higher drift; lacks force-sense outputs and extended −55°C rating | Choose ADR3420ARMZ for commercial-grade cost-sensitive applications where REF3220AMDBVREP's military temp range is unnecessary |
Compared with REF3420RTET and ADR3420ARMZ, REF3220AMDBVREP uniquely balances ultra-low power (100 μA), force-sense accuracy, and extended temperature qualification - making it irreplaceable in space-constrained, battery-operated, or high-reliability systems demanding both precision and longevity.
Availability
REF3220AMDBVREP is available at Aetrix Electronics and suitable for portable medical devices, industrial data loggers, and aerospace sensor interfaces requiring stable component supply under extended temperature and long-lifecycle conditions.
Supply support for REF3220AMDBVREP 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 specializing in analog and embedded processing technologies, with leadership in precision analog ICs and high-reliability components.
The REF32xx family was designed for high-accuracy, low-power, extended-temperature applications including defense avionics, downhole instrumentation, and portable diagnostic equipment requiring long-term stability and force-sense compensation.
FAQ
What is the maximum allowable voltage difference between GND_S and GND_F on the REF3220AMDBVREP?
The REF3220AMDBVREP specifies a maximum differential voltage of 200 mV between GND_S and GND_F pins. Exceeding this limit risks forward-biasing internal ESD protection diodes, causing unpredictable output behavior or increased drift. This constraint defines the practical PCB trace resistance budget for remote sensing layouts.
Does the REF3220AMDBVREP require an output capacitor for stability?
No, the REF3220AMDBVREP does not require an output capacitor for stability. It is explicitly characterized as stable with most capacitive loads from 1 μF to 47 μF and can operate reliably with no output capacitor. A 0.47 μF bypass capacitor on the IN pin is recommended for supply filtering, but the output remains stable without load capacitance.
What is the minimum supply voltage required for the REF3220AMDBVREP to regulate properly?
The REF3220AMDBVREP requires a minimum supply voltage of VOUT + 5 mV = 2.053 V under no-load conditions. Under load, dropout increases with current - e.g., 50 mV at 10 mA sink/source - so VIN must exceed VOUT by the specified dropout voltage for the given load condition to maintain regulation.
How does the ENABLE pin function on the REF3220AMDBVREP, and what voltage levels activate it?
The ENABLE pin on REF3220AMDBVREP is a digital input: logic high (≥1.5 V) enables the reference output and draws 100–135 μA; logic low (≤0.7 V) places the device in shutdown mode, reducing supply current to 0.1–1 μA and disconnecting OUT_F/OUT_S. The pin has no internal pull-up, so it must be actively driven.
Is the REF3220AMDBVREP suitable for new designs, and what is its product lifecycle status?
The REF3220AMDBVREP is marked "Not Recommended For New Designs" (NRND) per TI's official documentation. However, it remains in active production with full lifecycle support, traceable sourcing, and extended temperature qualification (–55°C to +125°C), making it appropriate for legacy design refreshes, long-lifecycle programs, and applications requiring its unique force-sense architecture and military-grade reliability.
REF3220AMDBVREP 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):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 40ppm/°C
- Noise - 0.1Hz to 10Hz:
- 27µVp-p
- Noise - 10Hz to 10kHz:
- 39µVrms
- Voltage - Input:
- 2.098V ~ 5.5V
- Current - Supply:
- 120µA
- Current - Cathode:
- -
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
REF3220AMDBVREP FAQ
1.How can I place an order for REF3220AMDBVREP through Aetrix?
Please submit a Request for Quotation (RFQ) for REF3220AMDBVREP 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 REF3220AMDBVREP reliable?
The price and inventory of REF3220AMDBVREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF3220AMDBVREP is usually 5 days.
3.What payment methods are accepted for REF3220AMDBVREP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF3220AMDBVREP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF3220AMDBVREP?
REF3220AMDBVREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF3220AMDBVREP 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 REF3220AMDBVREP?
For technical support, including REF3220AMDBVREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF3220AMDBVREP requirements.
6.How does Aetrix verify that REF3220AMDBVREP is sourced from the original manufacturer or authorized distributors?
All REF3220AMDBVREP 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 REF3220AMDBVREP meets industry standards.
7.What is the process for return or replacement of REF3220AMDBVREP?
All REF3220AMDBVREP units undergo pre-shipment inspection (PSI). If there is an issue with REF3220AMDBVREP, 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 REF3220AMDBVREP part is unused and in its original packaging.
Return procedure for REF3220AMDBVREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF3220AMDBVREP Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
Microchip Technology
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LM4040CYM3-4.1-TR
Microchip Technology
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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
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
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