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Texas Instruments REF3433QDBVRQ1
- Part No.:
- REF3433QDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SOT-23-6
- Datasheet:
-
REF3433QDBVRQ1.pdf
- Description:
- IC VREF SERIES 0.05% SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,641
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Product details
Overview
REF3433QDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified precision voltage reference delivering 3.3 V output with ±0.05% initial accuracy, 6 ppm/°C max temperature coefficient, and ±10 mA output current capability. It operates from −40°C to +125°C and supports battery-powered automotive systems requiring stable low-noise bias for high-resolution ADCs.
For engineers reviewing the REF3433QDBVRQ1 datasheet, REF3433QDBVRQ1 pinout, REF3433QDBVRQ1 application, or REF3433QDBVRQ1 equivalent, this page delivers verified electrical specs, validated SOT-23-6 pin functions, automotive-grade reliability data, and real-world implementation context for body control modules, traction inverters, and BMS designs.
Technical Context
The REF3433QDBVRQ1 implements a precision CMOS bandgap core with dual-output force-sense architecture (OUT_F/OUT_S) to minimize load-induced errors and improve regulation. Its enable-controlled shutdown mode reduces quiescent current to ≤3 μA while maintaining high-impedance output.
It achieves 3.8 µVPP/V (0.1 Hz–10 Hz) low-frequency noise and 24 µVRMS (10 Hz–10 kHz), enabling direct interface with 16-bit+ SAR and delta-sigma ADCs without external filtering. Thermal hysteresis is specified at ≤30 ppm (Cycle 1, DBV package) across −40°C to +125°C cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V nominal - precisely sets ADC reference rail or sensor excitation level in automotive signal chains. |
| Initial Accuracy | ±0.05% max - ensures <±1.65 mV absolute error at 25°C, critical for calibration-critical BMS cell monitoring. |
| Temp Coefficient | 6 ppm/°C max - contributes ≤0.83 mV drift over full −40°C to +125°C range, supporting ASIL-B timing integrity. |
| Quiescent Current | 95 μA max - enables >10-year battery life in always-on vehicle subsystems with minimal standby drain. |
| Output Current | ±10 mA - drives multiple ADC references or op-amp bias networks without external buffering. |
| Noise (0.1–10 Hz) | 3.8 µVPP/V - limits quantization noise floor to <1 LSB for 16-bit 3.3 V full-scale converters. |
| Shutdown Current | 3 μA max - allows system-level power gating during sleep modes without compromising wake-up latency. |
Pinout & Package
REF3433QDBVRQ1 is packaged in a 6-pin SOT-23 (DBV) with 2.90 mm × 1.60 mm body size, optimized for space-constrained automotive PCBs and compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND_F | Force ground | Low-impedance return path for output current; connects directly to power ground plane to minimize IR drop. |
| GND_S | Sense ground | High-impedance reference point for internal feedback; routed separately to avoid noise coupling into regulation loop. |
| EN | Digital enable input | Active-high logic control (1.6 V min) - toggles between 95 μA active and 3 μA shutdown modes. |
| OUT_F | Force output | Delivers regulated 3.3 V to load; designed for high-current sourcing/sinking with Kelvin connection capability. |
| IN | Input supply | Accepts 3.35 V to 12 V input; dropout voltage ≤100 mV at zero load ensures operation with low-headroom supplies. |
| OUT_S | Sense output | Feedback node for internal amplifier - connects to high-impedance ADC reference input or precision op-amp non-inverting terminal. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation with HBM ±2500 V and CDM ±1500 V ESD robustness. |
| Force-sense output architecture | Separates current-carrying (OUT_F) and sensing (OUT_S) paths to eliminate voltage drop errors under load. |
| Low long-term drift | 25 ppm/1000 hrs (DBV) - maintains calibration stability in safety-critical ADAS sensor front-ends over vehicle lifetime. |
| Ultra-low 1/f noise | 3.8 µVPP/V (0.1–10 Hz) - preserves dynamic range in high-resolution battery voltage monitoring and motor phase current sensing. |
| Thermal hysteresis control | ≤30 ppm (Cycle 1) - ensures repeatable reference voltage after thermal cycling in under-hood environments. |
Applications
| Body Control Module (BCM) | Traction Inverter |
|---|---|
Use Scenario: Monitoring door lock actuators, window lift motors, and interior lighting via 12-bit analog inputs. IC Role / Device Role / Timing Role: Provides stable 3.3 V reference for microcontroller ADCs sampling current-sense shunt voltages and potentiometer positions. Use Value: Enables ±0.05% measurement accuracy across temperature, reducing false fault detection in ISO 16750-compliant BCMs. | Use Scenario: Conditioning phase current feedback signals before digitization in IGBT gate driver control loops. IC Role / Device Role / Timing Role: Supplies low-noise 3.3 V reference to isolated sigma-delta modulators (e.g., AMC1306) interfacing with MCU ADCs. Use Value: 3.8 µVPP/V noise ensures <1 LSB error in 16-bit current reconstruction, improving torque control resolution. |
| Battery Management System (BMS) | Advanced Driver Assistance Systems (ADAS) |
Use Scenario: Measuring individual Li-ion cell voltages in 96-cell EV packs using multiplexed precision ADCs. IC Role / Device Role / Timing Role: Delivers 3.3 V reference to ADS1120-Q1 or similar 24-bit delta-sigma ADCs performing cold-junction compensation and cell balancing. Use Value: 6 ppm/°C drift and 25 ppm/1000 hrs stability maintain <1 mV absolute accuracy over 15-year vehicle life. | Use Scenario: Biasing radar transceiver IF amplifiers and ADC front-ends in 77 GHz automotive radar modules. IC Role / Device Role / Timing Role: Provides ultra-stable 3.3 V reference for high-speed ADCs digitizing chirp-based FMCW signals. Use Value: Low thermal hysteresis (≤30 ppm) prevents baseline shift during rapid ambient temperature swings in forward-facing radar housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3433QDGKRQ1 | Same electrical specs; uses 8-pin VSSOP (DGK) package with larger 4.00 mm × 4.00 mm footprint and different pinout (includes NIC pins). | Better thermal performance (RθJA = 174.1°C/W vs. 122.6°C/W) but requires PCB redesign; suited for thermally constrained high-power modules. | Select REF3433QDGKRQ1 only when board layout allows larger package and enhanced thermal dissipation is required. |
| LM4132AQME-3.3/NOPB | 3.3 V output, ±0.04% initial accuracy, but higher 10 ppm/°C tempco and no enable pin; consumes 120 μA typical quiescent current. | Lacks shutdown mode - unsuitable for battery-powered always-on nodes; used in legacy industrial sensors where enable control is unnecessary. | Choose LM4132AQME-3.3/NOPB only for cost-sensitive, non-shutdown applications where 10 ppm/°C drift is acceptable. |
Compared with REF3433QDGKRQ1 and LM4132AQME-3.3/NOPB, REF3433QDBVRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 6 ppm/°C drift, enable-controlled shutdown, and SOT-23-6 compactness - making it the optimal choice for new automotive designs prioritizing space, power, and ASIL compliance.
Availability
REF3433QDBVRQ1 is available at Aetrix Electronics and suitable for body control modules, traction inverters, and battery management systems requiring stable component supply across automotive production lifecycles.
Supply support for REF3433QDBVRQ1 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 automotive-grade precision analog solutions.
The REF34-Q1 product line was engineered specifically for automotive signal conditioning - delivering AEC-Q100 qualified, low-drift, low-noise voltage references for safety-critical ADAS, powertrain, and electrification systems.
FAQ
What is the maximum input voltage for REF3433QDBVRQ1?
The REF3433QDBVRQ1 supports an absolute maximum input voltage of 13 V, with recommended operation up to 12 V. Its dropout voltage remains ≤100 mV at zero load, allowing reliable function even with marginal supply headroom in 12 V automotive systems. Exceeding 13 V risks permanent damage per absolute maximum ratings.
Does REF3433QDBVRQ1 support bidirectional output current?
Yes, REF3433QDBVRQ1 provides ±10 mA output current capability - sourcing up to +10 mA and sinking up to –10 mA. This enables direct drive of both high-side and low-side sensor bias networks, op-amp reference inputs, and ADC reference pins without external buffers, confirmed in Section 7.5 Electrical Characteristics.
How does the force-sense architecture in REF3433QDBVRQ1 improve accuracy?
The REF3433QDBVRQ1 uses separate OUT_F (force) and OUT_S (sense) pins to decouple load current path from regulation feedback. This eliminates IR drop errors caused by PCB trace resistance, ensuring the internal amplifier regulates precisely to 3.3 V at the sense node - critical for maintaining ±0.05% accuracy under varying load conditions.
What is the typical turn-on time for REF3433QDBVRQ1 after enabling?
The REF3433QDBVRQ1 achieves 0.1% output voltage settling in 2.5 ms (typical) when CL = 10 µF, as measured from EN rising edge to VOUT stabilization. This fast wake-up supports responsive power management in automotive subsystems entering active mode from deep sleep states.
Is REF3433QDBVRQ1 compatible with standard SOT-23 reflow profiles?
Yes, REF3433QDBVRQ1 (DBV package) is qualified for standard lead-free reflow profiles, with solder heat shift typically <±0.01% post-reflow. TI characterizes thermal stress effects per JEDEC J-STD-020, and Figure 8-21 confirms distribution remains tightly bounded - enabling use in automated automotive PCB assembly lines.
REF3433QDBVRQ1 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):
- 3.3V
- 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:
- 3.8V ~ 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
REF3433QDBVRQ1 FAQ
1.How can I place an order for REF3433QDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for REF3433QDBVRQ1 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 REF3433QDBVRQ1 reliable?
The price and inventory of REF3433QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF3433QDBVRQ1 is usually 5 days.
3.What payment methods are accepted for REF3433QDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF3433QDBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF3433QDBVRQ1?
REF3433QDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF3433QDBVRQ1 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 REF3433QDBVRQ1?
For technical support, including REF3433QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF3433QDBVRQ1 requirements.
6.How does Aetrix verify that REF3433QDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All REF3433QDBVRQ1 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 REF3433QDBVRQ1 meets industry standards.
7.What is the process for return or replacement of REF3433QDBVRQ1?
All REF3433QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with REF3433QDBVRQ1, 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 REF3433QDBVRQ1 part is unused and in its original packaging.
Return procedure for REF3433QDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF3433QDBVRQ1 Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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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
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LM4040DIM3X-2.5/NOPB
Texas Instruments
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LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
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