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Texas Instruments REF3240AIDBVT
- Part No.:
- REF3240AIDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SOT-23-6
- Datasheet:
-
REF3240AIDBVT.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
REF3240AIDBVT from Texas Instruments is a precision 4.096V bandgap voltage reference IC with 4ppm/°C max drift (0°C to +125°C), ±10mA output drive, 0.01% initial accuracy, and 110μA quiescent current - designed for high-accuracy data acquisition systems requiring stable excitation or ADC reference in portable and medical instrumentation.
For engineers reviewing the REF3240AIDBVT datasheet, REF3240AIDBVT pinout, REF3240AIDBVT application, or REF3240AIDBVT equivalent, this page delivers verified specifications, SOT23-6 terminal mapping, force-sense architecture implications, low-dropout operation down to 5mV, and real-world substitution guidance for industrial-grade voltage reference selection.
Technical Context
The REF3240AIDBVT implements a CMOS-based bandgap core with separate force (OUT_F) and sense (OUT_S) outputs, enabling remote load regulation by compensating for trace resistance up to 200mV differential between GND_S and GND_F. Its architecture supports stable operation with any capacitive load and achieves 53µVPP (0.1Hz–10Hz) noise at 4.096V output.
It operates from supply voltages as low as VOUT + 5mV (unloaded), maintains 4ppm/°C drift over 0°C to +125°C, and features digital enable control with 1.5V activation threshold and sub-1µA shutdown current - making it suitable for battery-powered systems requiring precision and ultra-low power.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V ±0.008V (0.01% initial accuracy); enables direct interface with 12-bit ADCs using full-scale reference |
| Temp Drift (0°C to +125°C) | 4ppm/°C max; contributes ≤0.5 LSB error over temperature in 16-bit systems |
| Quiescent Current | 110μA typ (130μA max); allows >1-year battery life in 10μA-average-power portable designs |
| Dropout Voltage | 5mV min (unloaded); supports operation from single-cell Li-ion or coin-cell supplies |
| Output Drive | ±10mA sourcing/sinking; drives 10kΩ loads directly without external buffer |
| Noise (0.1Hz–10Hz) | 53µVPP; limits resolution in high-gain sensor front-ends to ~19-bit effective |
| Enable Threshold | VH = 1.5V min; compatible with 1.8V/3.3V GPIO without level-shifting |
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 path for internal bandgap and buffer circuits |
| 2: GND_S | Ground sense input | Connects to load ground to enable Kelvin sensing; must stay within ±200mV of GND_F |
| 3: ENABLE | Digital enable input | Active-high control: ≥1.5V enables reference; <0.7V places device in 1µA shutdown |
| 4: IN | Positive supply input | Accepts VOUT + 5mV min; supports ultra-low-voltage operation in energy-constrained systems |
| 5: OUT_S | Sense output | Feedback node connected to load; used with GND_S to compensate trace resistance |
| 6: OUT_F | Force output | Main regulated output; delivers precise 4.096V to load via OUT_S/GND_S feedback loop |
Key Features
| Feature | Design Value |
|---|---|
| Force-sense output architecture | Compensates for up to 200mV IR drop in PCB traces, maintaining ±0.01% accuracy at remote loads |
| Ultra-low dropout | 5mV minimum headroom enables use with single-cell batteries (e.g., 4.2V Li-ion → 4.096V ref) |
| Stable with any capacitive load | Eliminates need for external compensation or minimum load capacitance in space-constrained layouts |
| Low 0.1Hz–10Hz noise | 53µVPP enables high-resolution measurements in weigh scales and medical biosensors |
| Wide temp range support | Specified from –40°C to +125°C; meets industrial and automotive under-hood requirements |
Applications
| Portable Data Loggers | Medical Patient Monitors |
|---|---|
Use Scenario: Battery-powered handheld devices acquiring ECG, SpO₂, or temperature with 16-bit ADCs. IC Role / Device Role / Timing Role: Primary voltage reference for analog front-end and ADC conversion. Use Value: 4ppm/°C drift and 53µVPP noise ensure <0.5 LSB error across operating temperature and battery discharge cycle. |
Use Scenario: Compact bedside monitors requiring FDA-grade accuracy and long-term stability. IC Role / Device Role / Timing Role: Stable excitation source for precision transducer signal conditioning. Use Value: 55ppm long-term stability (0–1000h) and force-sense topology maintain calibration integrity over device lifetime. |
| Industrial PLC Analog Inputs | Test & Measurement Equipment |
Use Scenario: Modular I/O modules converting 4–20mA or thermocouple signals in harsh factory environments. IC Role / Device Role / Timing Role: Reference for isolated sigma-delta ADCs in channel-dense backplanes. Use Value: ±10mA drive and SOT23-6 size allow direct integration per channel without board area penalty. |
Use Scenario: Benchtop multimeters and DAQ systems demanding traceable 4.096V reference for 24-bit digitizers. IC Role / Device Role / Timing Role: High-accuracy, low-noise reference replacing bulkier buried-zener solutions. Use Value: 0.01% initial accuracy and 4ppm/°C drift meet Class A metrology requirements without oven control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR4540BRZ | 4.096V, 3ppm/°C max drift, 950μA IQ, SOIC-8 package | Higher power, larger footprint, better drift but incompatible pinout and no force-sense capability | Select when ultimate drift performance justifies higher IQ and board area; not drop-in |
| MAX6126AASA41+ | 4.096V, 5ppm/°C max drift, 350μA IQ, SOIC-8, integrated enable | Higher IQ, no force-sense, different enable logic (active-low), requires layout change | Choose for legacy SOIC compatibility where force-sense is unnecessary and 5ppm/°C is acceptable |
Compared with ADR4540BRZ and MAX6126AASA41+, REF3240AIDBVT offers unique force-sense regulation and ultra-low 110μA quiescent current in SOT23-6 - critical for space- and power-constrained portable instrumentation where trace resistance compensation and battery life are design priorities.
Availability
REF3240AIDBVT is available at Aetrix Electronics and suitable for portable equipment, medical instrumentation, and industrial data acquisition systems requiring stable component supply with guaranteed long-term continuity.
Supply support for REF3240AIDBVT 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 ICs and voltage references.
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 supply efficiency over legacy performance trade-offs.
FAQ
What is the maximum allowable voltage difference between GND_S and GND_F on the REF3240AIDBVT?
The REF3240AIDBVT specifies a maximum differential voltage of 200mV between GND_S and GND_F pins. Exceeding this risks forward-biasing internal ESD protection diodes, potentially causing output inaccuracy or latch-up. This limit defines the practical trace resistance compensation range for remote sensing applications.
Does the REF3240AIDBVT require an external bypass capacitor for stability?
No - the REF3240AIDBVT is internally compensated and stable with any capacitive load, including zero capacitance. A 0.47µF ceramic bypass capacitor on the IN pin is recommended for optimal PSRR and transient immunity, but it is not required for basic stability per the datasheet.
Can the REF3240AIDBVT operate from a 4.1V supply?
Yes - the REF3240AIDBVT has a minimum dropout voltage of 5mV, so it functions correctly with a 4.1V supply (4.1V − 4.096V = 4mV) only if unloaded. Under load, dropout increases; for ±10mA output, typical dropout is 20–50mV, requiring ≥4.116V supply to maintain regulation.
How does the force-sense architecture of the REF3240AIDBVT improve system accuracy?
The REF3240AIDBVT uses separate OUT_F and OUT_S pins with dedicated GND_F and GND_S to form a 4-wire Kelvin connection. By sensing voltage directly at the load, it actively adjusts OUT_F to compensate for IR drop in PCB traces - maintaining 4.096V ±0.01% accuracy regardless of trace resistance up to ~200mΩ.
What is the long-term stability specification for the REF3240AIDBVT?
The REF3240AIDBVT exhibits 55ppm typical long-term stability over 1000 hours, measured across 32 units. This parameter reflects gradual parametric shift due to silicon aging and is critical for calibration-critical applications like medical diagnostics and metrology equipment where recalibration intervals exceed one year.
REF3240AIDBVT 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):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 20ppm/°C
- Noise - 0.1Hz to 10Hz:
- 53µVp-p
- Noise - 10Hz to 10kHz:
- 78µVrms
- Voltage - Input:
- 4.146V ~ 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
REF3240AIDBVT FAQ
1.How can I place an order for REF3240AIDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for REF3240AIDBVT 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 REF3240AIDBVT reliable?
The price and inventory of REF3240AIDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF3240AIDBVT is usually 5 days.
3.What payment methods are accepted for REF3240AIDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF3240AIDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF3240AIDBVT?
REF3240AIDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF3240AIDBVT 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 REF3240AIDBVT?
For technical support, including REF3240AIDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF3240AIDBVT requirements.
6.How does Aetrix verify that REF3240AIDBVT is sourced from the original manufacturer or authorized distributors?
All REF3240AIDBVT 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 REF3240AIDBVT meets industry standards.
7.What is the process for return or replacement of REF3240AIDBVT?
All REF3240AIDBVT units undergo pre-shipment inspection (PSI). If there is an issue with REF3240AIDBVT, 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 REF3240AIDBVT part is unused and in its original packaging.
Return procedure for REF3240AIDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF3240AIDBVT Tags
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