My Inquiry
My Account
Texas Instruments REF3240AIDBVR
- Part No.:
- REF3240AIDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SOT-23-6
- Datasheet:
-
REF3240AIDBVR.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:5,220
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
REF3240AIDBVR from Texas Instruments is a precision 4.096V bandgap voltage reference IC with 4ppm/°C drift (0°C to +125°C), ±10mA output current, and 0.01% initial accuracy - designed for high-stability analog signal chains in portable data acquisition and medical instrumentation.
For engineers reviewing the REF3240AIDBVR datasheet, REF3240AIDBVR pinout, REF3240AIDBVR application, or REF3240AIDBVR equivalent, this page delivers verified specifications, SOT23-6 terminal mapping, force-sense architecture implications, low-dropout operation at 5mV, and validated alternatives for precision reference design.
Technical Context
The REF3240AIDBVR implements a CMOS bandgap core with buffered dual-output architecture: OUT_F delivers regulated 4.096V, while OUT_S enables remote sensing to compensate for trace resistance up to 200mV differential between GND_S and GND_F. Its ENABLE pin supports digital shutdown with <1µA quiescent current.
It operates with supply as low as VOUT + 5mV (unloaded) and maintains stability across capacitive loads without external compensation. Specified over –40°C to +125°C, it achieves 10.5ppm/°C typical drift and 55ppm long-term stability (0–1000h).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V ±0.008V (±0.2% tolerance); exact match for 12-bit ADC full-scale reference in 5V systems. |
| Initial Accuracy | ±0.01% at +25°C; eliminates need for post-manufacture trimming in production calibration. |
| Temp Drift (0°C to +125°C) | 4ppm/°C max; contributes ≤0.5mV error over industrial temperature range. |
| Quiescent Current | 110µA typ / 145µA max over temperature; enables >1-year battery life in 10µA sleep-mode systems. |
| Dropout Voltage | 5mV min (unloaded); allows direct regulation from low-headroom supplies like Li-ion battery discharge tails. |
| Output Current | ±10mA sourcing/sinking; drives ADC reference inputs, op-amp bias networks, and small DACs directly. |
| Long-Term Stability | 55ppm (0–1000h); ensures <0.23mV drift over first 42 days of continuous operation. |
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; connects to system power ground plane. |
| 2: GND_S | Analog sense ground | ESD-diode-connected internal ground; must stay within ±200mV of GND_F to avoid unintended conduction. |
| 3: ENABLE | Digital control input | Active-high logic: >1.5V enables reference; <0.7V disables output (1µA shutdown current). |
| 4: IN | Analog power input | Accepts supply as low as 4.101V (VOUT + 5mV); bypass capacitor (0.47µF) required at pin. |
| 5: OUT_S | Remote sense output | Connects to load-side ground to enable Kelvin sensing; cancels voltage drop in PCB traces. |
| 6: OUT_F | Regulated voltage output | Delivers stable 4.096V; used for ADC VREF, DAC reference, or precision bias generation. |
Key Features
| Feature | Design Value |
|---|---|
| Force-sense output architecture | Compensates for up to 200mV IR drop in PCB traces, enabling accurate voltage delivery at remote loads. |
| Ultra-low dropout (5mV) | Permits operation from depleted batteries or low-voltage rails where traditional references fail. |
| Stable with any capacitive load | Eliminates need for external compensation networks - simplifies layout and reduces BOM count. |
| 110µA quiescent current | Supports always-on precision monitoring in energy-constrained IoT sensors and portable diagnostics. |
| 4ppm/°C drift (0°C to +125°C) | Meets stringent accuracy requirements for Class I medical devices and calibrated test equipment. |
Applications
| Portable ECG Monitors | Data Acquisition Modules |
|---|---|
Use Scenario: Battery-powered handheld ECG units requiring stable 4.096V reference for 12-bit ADC sampling. IC Role / Device Role / Timing Role: Primary voltage reference for analog front-end; provides excitation and measurement baseline. Use Value: 4ppm/°C drift ensures <±0.5mV offset shift across body-temperature operating range (20°C–45°C). |
Use Scenario: Industrial DAQ systems digitizing sensor signals with 16-bit SAR ADCs. IC Role / Device Role / Timing Role: Precision reference source for ADS8381 and similar converters; enables full-scale accuracy. Use Value: Force-sense architecture maintains 4.096V ±0.01% at ADC input despite 50mΩ PCB trace resistance. |
| Calibrated Test Equipment | Point-of-Care Diagnostics |
Use Scenario: Benchtop multimeters and calibrators needing traceable, low-drift reference standards. IC Role / Device Role / Timing Role: Core reference element in self-calibration loops and voltage standard subsystems. Use Value: 55ppm long-term stability supports 90-day recalibration intervals without performance degradation. |
Use Scenario: Portable blood glucose meters and pulse oximeters with integrated analog signal processing. IC Role / Device Role / Timing Role: Reference for photodiode transimpedance amplifier gain setting and ADC conversion. Use Value: 0.01% initial accuracy eliminates factory trim, reducing assembly cost and test time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3440ARMZ | 4.096V, 10ppm/°C max drift (−40°C to +125°C), 120µA IQ, SOT23-5 (no sense pin) | Lacks force-sense capability; requires careful layout to minimize ground path errors | Select when board space is constrained and trace resistance <10mΩ; verify thermal drift impact on system accuracy |
| MAX6126AASA41+ | 4.096V, 3ppm/°C max drift (0°C to +70°C), 85µA IQ, SO-8 package | Higher accuracy over commercial temp range but not rated for full −40°C to +125°C industrial range | Prefer for lab-grade instruments operating at room temperature; avoid in automotive or outdoor deployments |
Compared with REF3240AIDBVR, ADR3440ARMZ offers smaller footprint but sacrifices force-sense correction and higher temperature-range drift performance, while MAX6126AASA41+ delivers superior room-temperature stability in larger SO-8 packaging - making REF3240AIDBVR optimal for compact, wide-temperature, high-accuracy portable systems.
Availability
REF3240AIDBVR is available at Aetrix Electronics and suitable for portable medical devices, industrial data acquisition modules, and calibrated test equipment requiring stable component supply with guaranteed long-term continuity.
Supply support for REF3240AIDBVR 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 battery-powered and space-constrained applications demanding ultra-low power, low dropout, and force-sense accuracy - targeting portable instrumentation, medical diagnostics, and industrial DAQ systems.
FAQ
What is the minimum supply voltage required for REF3240AIDBVR to operate correctly?
The REF3240AIDBVR requires a supply voltage of at least VOUT + 5mV (i.e., 4.101V) under no-load conditions. Under load, dropout increases - e.g., 50mV max at ±10mA. Operation below this threshold risks regulation loss and output instability. The device is not rated for sub-4.101V operation even with light loading.
How does the force-sense architecture of REF3240AIDBVR improve system accuracy?
The REF3240AIDBVR uses separate OUT_F and OUT_S pins to implement Kelvin sensing: OUT_S returns to the load's ground point, allowing internal feedback to compensate for voltage drop across PCB traces. This maintains 4.096V ±0.01% at the load even with 50mΩ trace resistance - eliminating a key source of gain error in precision ADC circuits.
Can REF3240AIDBVR drive a 10µF capacitive load without oscillation?
Yes - the REF3240AIDBVR is explicitly characterized as stable with "any capacitive load" per its datasheet. Unlike many references requiring minimum ESR or specific capacitor types, it maintains phase margin across 0–100µF ceramic, tantalum, or electrolytic capacitors without external compensation components.
What is the thermal hysteresis specification for REF3240AIDBVR?
The REF3240AIDBVR exhibits 100ppm thermal hysteresis on first temperature cycle (–40°C → +125°C → +25°C), degrading to 25ppm on subsequent cycles. This value reflects reversible mechanical stress effects in the silicon die and is measured against the nominal 4.096V output - critical for applications requiring repeatable calibration after thermal cycling.
Does REF3240AIDBVR require an external bypass capacitor, and if so, what value is recommended?
Yes - a 0.47µF ceramic bypass capacitor is required between IN and GND_F, placed as close as possible to the REF3240AIDBVR pins. This capacitor stabilizes the input rail during transient load events and suppresses high-frequency noise coupling into the reference core, ensuring specified 4ppm/°C drift and 110µA quiescent current performance.
REF3240AIDBVR 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
REF3240AIDBVR FAQ
1.How can I place an order for REF3240AIDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for REF3240AIDBVR 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 REF3240AIDBVR reliable?
The price and inventory of REF3240AIDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF3240AIDBVR is usually 5 days.
3.What payment methods are accepted for REF3240AIDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF3240AIDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF3240AIDBVR?
REF3240AIDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF3240AIDBVR 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 REF3240AIDBVR?
For technical support, including REF3240AIDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF3240AIDBVR requirements.
6.How does Aetrix verify that REF3240AIDBVR is sourced from the original manufacturer or authorized distributors?
All REF3240AIDBVR 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 REF3240AIDBVR meets industry standards.
7.What is the process for return or replacement of REF3240AIDBVR?
All REF3240AIDBVR units undergo pre-shipment inspection (PSI). If there is an issue with REF3240AIDBVR, 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 REF3240AIDBVR part is unused and in its original packaging.
Return procedure for REF3240AIDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF3240AIDBVR Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
