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Texas Instruments REF3450QDBVRQ1
- Part No.:
- REF3450QDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SOT-23-6
- Datasheet:
-
REF3450QDBVRQ1.pdf
- Description:
- IC VREF SERIES 0.05% SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:9,036
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Product details
Overview
REF3450QDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (−40°C to +125°C) precision CMOS voltage reference delivering 5.0 V output with ±0.05% initial accuracy, 6 ppm/°C max temperature coefficient, and 3.8 µVPP/V low-frequency noise (0.1 Hz–10 Hz). It supports ±10 mA load current, operates from 5.05 V to 12 V input, and features enable-controlled shutdown (3 µA max).
For engineers reviewing the REF3450QDBVRQ1 datasheet, REF3450QDBVRQ1 pinout, REF3450QDBVRQ1 application, or REF3450QDBVRQ1 equivalent, key selection criteria include automotive-grade thermal stability, ultra-low quiescent current (95 µA max), force-sense output architecture for high-accuracy data acquisition, and SOT-23-6 packaging for space-constrained BMS and ADAS sensor signal chains.
Technical Context
The REF3450QDBVRQ1 implements a precision bandgap core with buffered force-sense output architecture: OUT_F delivers regulated 5.0 V to the load, while OUT_S provides feedback to the internal error amplifier, minimizing IR drop and trace resistance errors. Its enable pin controls active/shutdown modes with fast 2.5 ms turn-on time and <0.5 V logic-low threshold.
Designed for automotive safety-critical systems, it meets AEC-Q100 Grade 1 requirements, including HBM ±2500 V and CDM ±1500 V ESD ratings, 25 ppm/1000 hrs long-term stability (DBV package), and thermal hysteresis ≤30 ppm (Cycle 1, DBV). Dropout voltage remains ≤100 mV at zero load and ≤500 mV at ±10 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal; stable reference for 16-bit+ ADCs in battery management and traction inverter monitoring. |
| Initial Accuracy | ±0.05% max at 25°C; enables single-point calibration in production without trimming. |
| Temp Coefficient | 6 ppm/°C max (−40°C to +125°C); ensures ≤0.75 mV total drift across full automotive ambient range. |
| Quiescent Current | 95 µA max over temperature; allows continuous operation in always-on vehicle subsystems with minimal battery drain. |
| Low-Freq Noise | 3.8 µVPP/V (0.1–10 Hz); preserves SNR in high-resolution SAR and delta-sigma converters used in ADAS sensors. |
| Shutdown Current | 3 µA max; reduces system standby power when paired with MCU-controlled EN pin in body control modules. |
| Load Current | ±10 mA sourcing/sinking; drives multiple ADC reference inputs or op-amp bias networks without external buffering. |
Pinout & Package
SOT-23-6 (DBV) package: 2.90 mm × 1.60 mm footprint, surface-mount, RoHS-compliant, rated for −40°C to +125°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND_F | Force ground | Primary return path for output current; connects to power ground plane to minimize voltage offset. |
| GND_S | Sense ground | High-impedance reference for internal error amplifier; ties to clean analog ground to reject ground noise. |
| EN | Enable input | Active-high logic control; pulls ≥1.6 V to activate, ≤0.5 V to enter 3 µA shutdown mode. |
| OUT_F | Force output | Delivers 5.0 V to load; routed directly to ADC VREF+ or sensor excitation circuitry. |
| IN | Input supply | Accepts 5.05–12 V; dropout as low as 50 mV enables use with post-regulated 5.5 V rails. |
| OUT_S | Sense output | Feedback node for internal regulation; connected to OUT_F via low-impedance trace to close loop. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation, HBM ±2500 V, CDM ±1500 V - suitable for under-hood and battery-pack applications. |
| Force-sense output architecture | Separates current-carrying (OUT_F/GND_F) and sensing (OUT_S/GND_S) paths to eliminate PCB trace resistance errors in high-accuracy measurement. |
| Ultra-low 1/f noise | 3.8 µVPP/V (0.1–10 Hz) enables <100 dB SNR in 20-bit ADCs used in EV battery cell voltage monitoring. |
| Stable capacitive loading | Operates with 0.1–10 µF output capacitance; compatible with standard ceramic decoupling without oscillation risk. |
| Thermal hysteresis control | ≤30 ppm (Cycle 1) ensures repeatable reference voltage after thermal cycling in ADAS camera modules and radar units. |
Applications
| Body Control Modules | On-Board Chargers |
|---|---|
Use Scenario: Monitoring 12 V battery health and interior lighting PWM dimming accuracy in modern vehicle cabins. IC Role / Device Role / Timing Role: Provides stable 5.0 V reference for microcontroller ADCs measuring battery voltage, temperature, and current shunt signals. Use Value: ±0.05% initial accuracy eliminates factory calibration steps; 6 ppm/°C drift ensures consistent readings across cabin temperature swings. |
Use Scenario: Precision voltage sensing of DC-link capacitors and isolated AC/DC converter outputs during EV charging cycles. IC Role / Device Role / Timing Role: Supplies reference to isolated sigma-delta ADCs (e.g., AMC1306) performing high-voltage DC bus monitoring. Use Value: Force-sense architecture rejects PCB layout-induced errors; 3.8 µVPP/V noise maintains >18-bit ENOB at 10 kSPS sampling rates. |
| Traction Inverters | Battery Management Systems |
Use Scenario: Real-time phase current sensing and IGBT gate driver biasing in 400 V/800 V electric drive inverters. IC Role / Device Role / Timing Role: Delivers 5.0 V reference to current-sense amplifiers and isolated gate drivers requiring tight common-mode rejection. Use Value: ±10 mA drive capability powers multiple downstream analog blocks; shutdown mode cuts leakage during vehicle sleep states. |
Use Scenario: Cell voltage measurement in 96-cell lithium-ion packs, where each cell's 3.0–4.2 V range must be resolved to ±1 mV. IC Role / Device Role / Timing Role: Reference source for 24-channel SAR ADCs (e.g., ADS7951-Q1) performing simultaneous cell monitoring. Use Value: 25 ppm/1000 hrs long-term stability minimizes recalibration frequency; AEC-Q100 qualification ensures reliability over 15-year pack life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3450QDGKRQ1 | Same electrical specs but in 8-pin VSSOP (DGK) package; includes dedicated NIC pins and lower RθJA (174.1°C/W vs 122.6°C/W). | Better thermal performance in high-power-density modules; requires larger PCB area and different layout. | Select DGKRQ1 for thermally constrained traction inverter control boards needing enhanced long-term stability (17 ppm/1000 hrs). |
| LM4132QMFE-5.0/NOPB | 5.0 V output, ±0.04% initial accuracy, but higher 10 ppm/°C drift and no enable pin; consumes 120 µA typical quiescent current. | Lacks shutdown mode and force-sense architecture; unsuitable for low-power BMS wake-up circuits or noise-sensitive ADAS sensors. | Choose LM4132QMFE-5.0 only if board space permits SOIC-8 and system does not require dynamic power gating or sub-5 ppm/°C drift. |
Compared with REF3450QDBVRQ1, REF3450QDGKRQ1 offers superior thermal metrics and long-term stability in larger packages, while LM4132QMFE-5.0 trades enable functionality and ultra-low drift for marginally better initial accuracy - making REF3450QDBVRQ1 optimal for compact, power-aware automotive signal chains demanding both precision and configurability.
Availability
REF3450QDBVRQ1 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, advanced driver assistance systems, and on-board chargers requiring stable component supply across automotive production lifecycles.
Supply support for REF3450QDBVRQ1 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 ICs.
The REF34-Q1 product line is designed specifically for automotive safety-critical applications requiring AEC-Q100 qualification, ultra-low drift, and robust noise performance in harsh thermal environments.
FAQ
What is the maximum input voltage for REF3450QDBVRQ1?
The absolute maximum input voltage for REF3450QDBVRQ1 is 13 V, but the recommended operating maximum is 12 V per the datasheet. Operation above 12 V risks exceeding absolute maximum ratings and may degrade long-term reliability. The device maintains regulation down to VOUT + VDO, where VDO is 50 mV at zero load and up to 500 mV at ±10 mA - ensuring compatibility with tightly regulated 5.5 V supply rails.
Does REF3450QDBVRQ1 support force-sense configuration?
Yes, REF3450QDBVRQ1 implements a true force-sense architecture with separate OUT_F (force output) and OUT_S (sense output) pins, plus GND_F and GND_S terminals. This allows routing the high-current output path away from sensitive feedback traces, eliminating voltage errors caused by PCB trace resistance - a critical feature for maintaining ±0.05% accuracy in production-level automotive BMS and ADAS designs.
What is the typical turn-on time for REF3450QDBVRQ1?
The typical turn-on time for REF3450QDBVRQ1 is 2.5 ms, defined as the time required for the output to settle within 0.1% of final 5.0 V value after the EN pin transitions from low to high. This specification applies with CL = 10 µF and is verified across temperature (−40°C to +125°C). Fast settling supports responsive power sequencing in ADAS camera modules and real-time battery cell monitoring systems.
Can REF3450QDBVRQ1 drive a 10 µF output capacitor?
Yes, REF3450QDBVRQ1 is fully stable with output capacitance ranging from 0.1 µF to 10 µF, as confirmed in Section 7.5 of the datasheet. It is optimized for standard X7R/X5R ceramic capacitors and does not require series resistance or special ESR considerations - simplifying layout in space-constrained automotive ECUs and enabling direct connection to ADC reference inputs without additional filtering components.
Is REF3450QDBVRQ1 qualified for automotive applications?
Yes, REF3450QDBVRQ1 is AEC-Q100 qualified as Grade 1 (−40°C to +125°C ambient), with documented HBM ±2500 V and CDM ±1500 V ESD ratings. It undergoes extended reliability testing including thermal hysteresis, long-term stability (25 ppm/1000 hrs), and solder heat shift characterization - meeting requirements for deployment in body control modules, on-board chargers, and battery management systems across Tier 1 and OEM automotive programs.
REF3450QDBVRQ1 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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 6ppm/°C
- Noise - 0.1Hz to 10Hz:
- 3.8µVp-p
- Noise - 10Hz to 10kHz:
- 24µVrms
- Voltage - Input:
- 6V ~ 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
REF3450QDBVRQ1 FAQ
1.How can I place an order for REF3450QDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for REF3450QDBVRQ1 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 REF3450QDBVRQ1 reliable?
The price and inventory of REF3450QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF3450QDBVRQ1 is usually 5 days.
3.What payment methods are accepted for REF3450QDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF3450QDBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF3450QDBVRQ1?
REF3450QDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF3450QDBVRQ1 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 REF3450QDBVRQ1?
For technical support, including REF3450QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF3450QDBVRQ1 requirements.
6.How does Aetrix verify that REF3450QDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All REF3450QDBVRQ1 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 REF3450QDBVRQ1 meets industry standards.
7.What is the process for return or replacement of REF3450QDBVRQ1?
All REF3450QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with REF3450QDBVRQ1, 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 REF3450QDBVRQ1 part is unused and in its original packaging.
Return procedure for REF3450QDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF3450QDBVRQ1 Tags
-
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
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AZ431LANTR-G1
Diodes Incorporated
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