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Texas Instruments REF3212AIDBVTG4
- Part No.:
- REF3212AIDBVTG4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SOT-23-6
- Datasheet:
-
REF3212AIDBVTG4.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,382
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Product details
Overview
REF3212AIDBVTG4 from Texas Instruments is a precision 1.25V bandgap voltage reference IC with 0.01% initial accuracy, 4ppm/°C max drift (0°C to +125°C), and ±10mA output drive capability - deployed in high-resolution data acquisition systems requiring stable excitation for 12–16-bit ADCs.
For engineers reviewing the REF3212AIDBVTG4 datasheet, REF3212AIDBVTG4 pinout, REF3212AIDBVTG4 application, or REF3212AIDBVTG4 equivalent, key selection criteria include low dropout (5mV), force-sense output architecture for load regulation compensation, microamp quiescent current (110μA), and SOT23-6 package compatibility with space-constrained portable instrumentation.
Technical Context
The REF3212AIDBVTG4 implements a CMOS-based bandgap core with buffered force-sense outputs (OUT_F/OUT_S) and digital enable control, enabling precise remote sensing while rejecting trace resistance effects. Its topology integrates a temperature-compensated VBE difference amplifier and low-impedance output buffer.
It operates down to 1.8V supply (5mV above 1.25V output under no load), supports any capacitive load without instability, and delivers 17µVPP (0.1Hz–10Hz) and 24µVRMS (10Hz–10kHz) noise - critical for low-drift analog front-ends in medical sensors and portable test equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.25V ±0.0025V (0.01% initial accuracy) - ensures <±0.5 LSB error in 12-bit ADC reference paths |
| Temp Drift (0°C to +125°C) | 4ppm/°C max - limits total drift to ±0.5mV over full industrial range |
| Quiescent Current | 110μA typical - enables >1-year battery life in 10μA sleep-cycle portable devices |
| Dropout Voltage | 5mV min - allows operation from 1.255V supply, ideal for single-cell LiFePO₄ or coin-cell systems |
| Load Regulation | ±40μV/mA sourcing - maintains <0.03% output shift across full ±10mA output range with force-sense correction |
| Long-Term Stability | 55ppm (0–1000h) - guarantees <0.07mV drift over first 6 weeks of field use |
| PSRR | 80dB at 100Hz - suppresses switching regulator ripple in mixed-signal PCB layouts |
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-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: GND_F | Analog ground reference | Primary ground return path for internal bandgap and buffer circuits; connects to system power ground plane |
| 2: GND_S | Remote sense ground | ESD-diode-connected internal ground node; must stay within ±200mV of GND_F to prevent diode conduction |
| 3: ENABLE | Digital enable input | Active-high logic control (1.5V–VIN): pulls output to ~100kΩ resistive ground when <0.7V |
| 4: IN | Positive supply input | Accepts 1.8V to 5.5V; supplies all internal circuitry including bandgap core and output buffer |
| 5: OUT_S | Force-sense output sense | Connects directly to load ground to compensate for trace resistance in precision remote sensing |
| 6: OUT_F | Main output voltage | Delivers regulated 1.25V; routed to load via separate trace from OUT_S to enable Kelvin connection |
Key Features
| Feature | Design Value |
|---|---|
| Force-sense output architecture | Compensates for up to 100mΩ PCB trace resistance between reference and load, eliminating load-regulation error |
| Ultra-low dropout | 5mV minimum headroom enables direct use with 1.255V LDOs or single-cell energy harvesting sources |
| Stable with any capacitive load | No external compensation required - simplifies layout in high-density portable designs with decoupling caps near ADCs |
| Low 0.1Hz–10Hz noise | 17µVPP enables sub-16-bit effective resolution in DC-coupled sensor signal chains |
| Wide temperature specification | –40°C to +125°C operating range supports automotive cabin and industrial motor-control environments |
Applications
| Portable Medical Sensors | Data Acquisition Modules |
|---|---|
Use Scenario: Battery-powered ECG front-end with 16-bit SAR ADC sampling at 1kSPS. IC Role / Device Role / Timing Role: Primary 1.25V reference for ADC VREF input and op-amp biasing network. Use Value: 4ppm/°C drift and 17µVPP noise ensure <±1.5µV baseline stability over 8-hour clinical monitoring sessions. |
Use Scenario: Industrial PLC analog input card measuring 4–20mA loop signals with 24-bit ΣΔ ADC. IC Role / Device Role / Timing Role: Precision excitation source for RTD bridge and reference for ADC conversion. Use Value: Force-sense outputs maintain <0.005% gain accuracy despite 50mΩ PCB trace resistance between REF3212AIDBVTG4 and ADC. |
| Handheld Test Equipment | Battery Management Systems |
Use Scenario: Portable multimeter with auto-ranging 12-bit DMM ASIC requiring calibrated voltage references. IC Role / Device Role / Timing Role: Stable 1.25V reference for internal DAC calibration and ADC offset trimming. Use Value: 55ppm long-term stability ensures calibration validity for ≥6 months between factory recalibrations. |
Use Scenario: Li-ion pack monitor IC measuring cell voltages with 1mV resolution. IC Role / Device Role / Timing Role: Low-power reference for voltage measurement ADC and protection comparator thresholds. Use Value: 110μA quiescent current extends sleep-mode battery life to >5 years in always-on BMS applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3412RTET | Higher initial accuracy (0.025% vs 0.01%), lower drift (3ppm/°C), but requires 2.5V min supply and draws 95μA | Preferred for ultra-precision lab-grade instruments; not suitable for 1.8V-supplied portable designs | Select REF3412RTET only if supply ≥2.5V and drift <3ppm/°C is mandatory; REF3212AIDBVTG4 remains optimal for 1.25V/1.8V systems |
| ADR3412ARMZ | Same 1.25V output and SOT23-6 package, but higher 150μA quiescent current and 10ppm/°C drift (0°C–70°C) | Targeted at commercial-temp applications; lacks extended –40°C to +125°C qualification | Choose ADR3412ARMZ for cost-sensitive commercial designs where extended temp range and ultra-low IQ are noncritical |
Compared with REF3412RTET and ADR3412ARMZ, REF3212AIDBVTG4 uniquely balances 1.25V output, 1.8V operation, 4ppm/°C drift over full industrial range, and 110μA IQ - making it the only option qualified for battery-powered, wide-temperature, high-resolution portable instrumentation.
Availability
REF3212AIDBVTG4 is available at Aetrix Electronics and suitable for portable medical sensors, industrial data acquisition modules, and handheld test equipment requiring stable component supply with guaranteed long-term continuity.
Supply support for REF3212AIDBVTG4 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 reference design and high-reliability manufacturing.
The REF32xx family was engineered specifically for portable and battery-powered instrumentation demanding micropower operation, low dropout, and force-sense accuracy - targeting medical, test, and industrial sensing applications.
FAQ
What is the minimum supply voltage required for stable operation of REF3212AIDBVTG4?
The REF3212AIDBVTG4 requires a minimum supply voltage of 1.8V - 550mV above its 1.25V output - to guarantee specified performance across –40°C to +125°C. Below 1.8V, output regulation degrades and dropout behavior becomes unpredictable. This requirement is explicitly defined in Section 5.3 and Figure 5-7 of the official datasheet.
How does the force-sense architecture of REF3212AIDBVTG4 improve accuracy in real PCB layouts?
The REF3212AIDBVTG4 uses separate OUT_F (force) and OUT_S (sense) pins to actively compensate for voltage drop across PCB traces. By routing OUT_S directly to the load ground point, the internal amplifier adjusts OUT_F to maintain exact 1.25V at the load - eliminating errors from trace resistance up to ~100mΩ. This is validated in Figure 6-5 and Section 6.3.4.
Can REF3212AIDBVTG4 be used with capacitive loads, and is external compensation required?
Yes, REF3212AIDBVTG4 is unconditionally stable with any capacitive load - including 1µF ceramic bypass caps and 10µF tantalum bulk capacitors - without external compensation. This is confirmed in Section 7.1 and Figure 7-1, where stability is guaranteed regardless of load capacitance value or ESR.
What is the shutdown current consumption of REF3212AIDBVTG4, and how is it controlled?
When the ENABLE pin is pulled below 0.7V, REF3212AIDBVTG4 enters shutdown mode and draws only 0.1–1µA. The output becomes a high-impedance resistive load (~100–400kΩ to ground). This behavior is characterized in Section 5.3 (ENABLE/SHUTDOWN table) and enables ultra-low-power sleep states in portable systems.
Does REF3212AIDBVTG4 meet industrial temperature requirements, and what is its specified operating range?
Yes, REF3212AIDBVTG4 is fully specified from –40°C to +125°C for all key parameters including output voltage, drift, and quiescent current. This extended industrial range is documented in Section 5.3 (Temperature Range table) and validated across 32 units in Figure 5-19 long-term stability testing.
REF3212AIDBVTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SOT-23-6
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 20ppm/°C
- Noise - 0.1Hz to 10Hz:
- 17µVp-p
- Noise - 10Hz to 10kHz:
- 24µVrms
- Voltage - Input:
- 1.8V ~ 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
REF3212AIDBVTG4 FAQ
1.How can I place an order for REF3212AIDBVTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for REF3212AIDBVTG4 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 REF3212AIDBVTG4 reliable?
The price and inventory of REF3212AIDBVTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF3212AIDBVTG4 is usually 5 days.
3.What payment methods are accepted for REF3212AIDBVTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF3212AIDBVTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF3212AIDBVTG4?
REF3212AIDBVTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF3212AIDBVTG4 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 REF3212AIDBVTG4?
For technical support, including REF3212AIDBVTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF3212AIDBVTG4 requirements.
6.How does Aetrix verify that REF3212AIDBVTG4 is sourced from the original manufacturer or authorized distributors?
All REF3212AIDBVTG4 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 REF3212AIDBVTG4 meets industry standards.
7.What is the process for return or replacement of REF3212AIDBVTG4?
All REF3212AIDBVTG4 units undergo pre-shipment inspection (PSI). If there is an issue with REF3212AIDBVTG4, 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 REF3212AIDBVTG4 part is unused and in its original packaging.
Return procedure for REF3212AIDBVTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF3212AIDBVTG4 Tags
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