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Texas Instruments REF3430QDBVRQ1
- Part No.:
- REF3430QDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SOT-23-6
- Datasheet:
-
REF3430QDBVRQ1.pdf
- Description:
- IC VREF SERIES 0.05% SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,976
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Product details
Overview
REF3430QDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (−40°C to +125°C) precision CMOS voltage reference delivering 3.0 V output with ±0.05% initial accuracy, 6 ppm/°C max temperature coefficient, 95 μA max quiescent current, and 3.8 µVPP/V low-frequency noise - used in high-resolution ADC biasing for automotive battery management systems.
For engineers reviewing the REF3430QDBVRQ1 datasheet, REF3430QDBVRQ1 pinout, REF3430QDBVRQ1 application, or REF3430QDBVRQ1 equivalent, this page delivers verified electrical specs, SOT-23-6 pin mapping, automotive-grade thermal hysteresis data, and real-world load regulation performance across −40°C to +125°C.
Technical Context
The REF3430QDBVRQ1 implements a precision bandgap core with dual-output force/sense architecture (OUT_F/OUT_S) and integrated enable-controlled shutdown mode. Its 6 ppm/°C drift is characterized using the box method over −40°C to +125°C, and its 3.8 µVPP/V (0.1–10 Hz) noise enables <20-bit ADC performance without external filtering.
It operates from 3.05 V to 12 V input (50 mV dropout at 0 mA), sustains ±10 mA output current, and achieves 25 ppm/1000 hrs long-term stability in the DBV package. Thermal hysteresis is specified at 30 ppm (Cycle 1) and 10 ppm (Cycle 2) for the SOT-23-6 variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal - precisely sets ADC reference rail for 3.0 V–system signal chains. |
| Initial Accuracy | ±0.05% max - ensures ≤1.5 mV absolute error at 25°C, critical for calibration-critical BMS sensors. |
| Temp Coefficient | 6 ppm/°C max - limits drift to ±0.72 mV over full −40°C to +125°C range. |
| Quiescent Current | 95 μA max - enables multi-year operation in always-on automotive modules powered by 12 V battery. |
| Noise (0.1–10 Hz) | 3.8 µVPP/V - supports 19.5+ ENOB in 20-bit SAR ADCs like ADS7951-Q1 without post-filtering. |
| Shutdown Current | 3 μA max - reduces system standby power when paired with MCU GPIO control of EN pin. |
| Load Current | ±10 mA - drives multiple ADC reference inputs or op-amp buffers without external gain stage. |
Pinout & Package
SOT-23-6 (DBV) package: 2.90 mm × 1.60 mm body, surface-mount, RoHS-compliant, rated for −40°C to +125°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND_F | Force ground | Low-impedance return path for output current; connects directly to PCB ground plane under device. |
| GND_S | Sense ground | High-impedance reference for internal feedback; routed separately to minimize IR drop errors. |
| EN | Enable input | Active-high logic control: ≥1.6 V enables output; ≤0.5 V places REF3430QDBVRQ1 in 3 μA shutdown. |
| OUT_F | Force output | Main reference output terminal; delivers ±10 mA while maintaining regulation under load. |
| IN | Power input | Accepts 3.05 V to 12 V supply; 50 mV dropout at zero load enables use with low-headroom LDOs. |
| OUT_S | Sense output | Feedback-sense node; connects to high-impedance ADC VREF+ or instrumentation amplifier reference input. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-output force/sense topology | Separates high-current output (OUT_F) from precision sense (OUT_S), eliminating trace IR drop errors in noisy automotive PCBs. |
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C operation, HBM ±2500 V, CDM ±1500 V - meets functional safety requirements for ASIL-B systems. |
| Low thermal hysteresis | 30 ppm (Cycle 1) / 10 ppm (Cycle 2) - ensures repeatable reference voltage after thermal cycling in engine bay environments. |
| Stable capacitive loading | Operates with 0.1–10 µF output capacitance - compatible with standard ceramic decoupling without oscillation risk. |
| Low solder heat shift | <±0.01% typical post-reflow shift - maintains initial accuracy after single Pb-free reflow, critical for automotive production yield. |
Applications
| Body Control Module | On-Board Charger |
|---|---|
Use Scenario: Monitoring 12 V battery state-of-charge and load current via isolated shunt amplifiers and 16-bit ADCs. IC Role / Device Role / Timing Role: Provides stable 3.0 V reference for current-sense amplifier gain-setting and ADC full-scale calibration. Use Value: Enables ±0.5% SOC accuracy over lifetime by maintaining ±0.05% initial accuracy and 6 ppm/°C drift across under-hood temperature swings. |
Use Scenario: Precision voltage sensing of DC-link capacitor in 6.6 kW OBC during active rectification and regenerative braking. IC Role / Device Role / Timing Role: Supplies reference to isolated sigma-delta modulator (e.g., AMC1306) feeding MCU-based control loop. Use Value: 3.8 µVPP/V noise ensures ≤0.001% measurement error in 100 kHz sampling, improving power conversion efficiency by 0.3%. |
| Traction Inverter | Battery Management System |
Use Scenario: Gate driver bias and current sensor calibration in IGBT/SiC half-bridge modules operating at 85°C junction temperature. IC Role / Device Role / Timing Role: Delivers regulated 3.0 V to isolated gate driver ICs and shunt monitor references under high EMI conditions. Use Value: 95 μA quiescent current minimizes self-heating; 12 V input tolerance allows direct connection to vehicle 12 V rail without pre-regulation. |
Use Scenario: Cell voltage monitoring in 96-cell EV battery packs using daisy-chained 16-bit ADCs (e.g., ADS7951-Q1). IC Role / Device Role / Timing Role: High-stability 3.0 V reference for multiplexed cell voltage acquisition across all 96 channels. Use Value: 25 ppm/1000 hrs long-term stability reduces recalibration frequency from quarterly to annual, lowering service cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3430QDGKRQ1 | Same 3.0 V output, ±0.05% accuracy, and 6 ppm/°C drift, but in 8-pin VSSOP (DGK) package with different pinout and higher RθJA (174.1°C/W). | Requires PCB redesign due to larger 4.00 mm × 4.00 mm footprint and 8-pin layout; better thermal hysteresis (20 ppm Cycle 1). | Select DGK only if board space permits and lower thermal hysteresis outweighs SMT placement complexity. |
| LM4132QMFE-3.0/NOPB | 3.0 V output, ±0.04% initial accuracy, but 20 ppm/°C max drift and no enable pin; 100 μA quiescent current. | Lacks shutdown mode and automotive temp range - not qualified to AEC-Q100; limited to cabin electronics. | Use only in non-safety-critical, lower-temp applications where ultra-low initial error is prioritized over drift and power control. |
Compared with REF3430QDGKRQ1, REF3430QDBVRQ1 offers smaller footprint and lower thermal resistance, while LM4132QMFE-3.0/NOPB trades AEC-Q100 compliance and enable functionality for marginally better initial accuracy - making REF3430QDBVRQ1 optimal for space-constrained, safety-certified automotive power stages.
Availability
REF3430QDBVRQ1 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, on-board chargers, and advanced driver assistance systems requiring stable component supply across automotive production lifecycles.
Supply support for REF3430QDBVRQ1 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 focused on analog and embedded processing technologies, with leadership in precision analog ICs for automotive, industrial, and communications markets.
The REF34-Q1 product line delivers AEC-Q100 qualified voltage references optimized for high-accuracy, low-drift, low-power operation in automotive powertrain and battery systems - targeting ASIL-B functional safety compliance.
FAQ
What is the maximum input voltage for REF3430QDBVRQ1?
The REF3430QDBVRQ1 supports a maximum input voltage of 12 V, with absolute maximum rating up to 13 V. Operation above 12 V is not recommended, as it exceeds the recommended operating condition and may impact long-term reliability or thermal performance in the SOT-23-6 package. The device maintains regulation down to VOUT + 50 mV dropout at zero load.
Does REF3430QDBVRQ1 support shutdown mode, and how is it controlled?
Yes, REF3430QDBVRQ1 supports shutdown mode via its dedicated EN pin. Pulling EN ≤0.5 V disables the output and reduces quiescent current to ≤3 μA. Pulling EN ≥1.6 V enables normal operation. The EN pin must not exceed the IN supply voltage, and no external pull-up is required - internal circuitry ensures clean transition between states.
What is the output noise specification of REF3430QDBVRQ1, and how does it affect ADC performance?
REF3430QDBVRQ1 specifies 3.8 µVPP/V (0.1–10 Hz) low-frequency noise and 24 µVRMS (10 Hz–10 kHz). This enables ≥19.5 ENOB in 20-bit SAR ADCs such as ADS7951-Q1 without additional filtering. The noise value is measured per volt of output, so at 3.0 V output, total peak-to-peak noise is ~11.4 µVPP, directly limiting effective resolution in precision measurement paths.
Is REF3430QDBVRQ1 qualified for automotive applications, and what AEC-Q100 grade does it meet?
Yes, REF3430QDBVRQ1 is AEC-Q100 qualified for automotive use. It meets Grade 1 specifications: ambient operating temperature range of −40°C to +125°C, HBM ESD classification Level 2 (±2500 V), and CDM ESD classification Level C6 (±1500 V). These qualifications are verified per TI's production test flow and documented in the SBAS901C datasheet revision history.
How does the force/sense architecture of REF3430QDBVRQ1 improve accuracy in high-current applications?
The REF3430QDBVRQ1 uses separate OUT_F (force) and OUT_S (sense) pins to isolate the high-current output path from the precision feedback loop. This eliminates voltage drop errors caused by PCB trace resistance under ±10 mA load, ensuring the internal regulator maintains exact 3.0 V at the sense node - critical for metrology-grade measurements in battery monitoring and motor control circuits.
REF3430QDBVRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SOT-23-6
- Series:
- REF34xx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 6ppm/°C
- Noise - 0.1Hz to 10Hz:
- 5µVp-p
- Noise - 10Hz to 10kHz:
- 24µVrms
- Voltage - Input:
- 3.5V ~ 12V
- Current - Supply:
- 95µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
REF3430QDBVRQ1 FAQ
1.How can I place an order for REF3430QDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for REF3430QDBVRQ1 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 REF3430QDBVRQ1 reliable?
The price and inventory of REF3430QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF3430QDBVRQ1 is usually 5 days.
3.What payment methods are accepted for REF3430QDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF3430QDBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF3430QDBVRQ1?
REF3430QDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF3430QDBVRQ1 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 REF3430QDBVRQ1?
For technical support, including REF3430QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF3430QDBVRQ1 requirements.
6.How does Aetrix verify that REF3430QDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All REF3430QDBVRQ1 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 REF3430QDBVRQ1 meets industry standards.
7.What is the process for return or replacement of REF3430QDBVRQ1?
All REF3430QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with REF3430QDBVRQ1, 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 REF3430QDBVRQ1 part is unused and in its original packaging.
Return procedure for REF3430QDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF3430QDBVRQ1 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
-
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
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