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Texas Instruments REF3425SQDBVRQ1
- Part No.:
- REF3425SQDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
REF3425SQDBVRQ1.pdf
- Description:
- IC VREF SERIES 0.05% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,102
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Product details
Overview
REF3425SQDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified, low-drift (6 ppm/°C max), low-power (95 µA max) precision CMOS voltage reference delivering 2.5 V output with ±0.05% initial accuracy and ±10 mA output current capability. It operates from −40°C to +125°C and features enable-controlled shutdown (3 µA max), making it suitable for high-accuracy battery-powered automotive sensor signal chains and BMS front-ends.
For engineers reviewing the REF3425SQDBVRQ1 datasheet, REF3425SQDBVRQ1 pinout, REF3425SQDBVRQ1 application, or REF3425SQDBVRQ1 equivalent, key selection criteria include its 3.8 µVPP/V low-frequency noise, 25 ppm/1000 hrs long-term stability, force-sense output architecture, and SOT-23-6 automotive-grade packaging with validated thermal hysteresis performance.
Technical Context
The REF3425SQDBVRQ1 implements a precision bandgap core with buffered force-sense output topology, separating output drive (OUT_F) and sensing (OUT_S) paths to minimize load-induced errors. Its enable pin controls active/shutdown modes with defined logic thresholds (EN ≥1.6 V for active, ≤0.5 V for shutdown).
It uses a box-method temperature coefficient specification (6 ppm/°C max over −40°C to +125°C), achieves 0.1 Hz–10 Hz noise of 3.8 µVPP/V, and maintains <30 ppm thermal hysteresis after first temperature cycle in the DBV package - critical for repeatable calibration in ADAS and traction inverter monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V nominal; enables precise scaling for 12-bit+ ADCs like ADS7828-Q1 in automotive data acquisition. |
| Initial Accuracy | ±0.05% max at 25°C; reduces system calibration burden in body control modules and on-board chargers. |
| Temp Coefficient | 6 ppm/°C max (−40°C to +125°C); ensures <±0.75 mV drift across full automotive ambient range. |
| Quiescent Current | 95 µA max active / 3 µA max shutdown; extends battery life in always-on vehicle subsystems. |
| Noise (0.1–10 Hz) | 3.8 µVPP/V; preserves SNR in high-resolution converters used in battery cell voltage monitoring. |
| Output Current | ±10 mA; supports driving multiple ADC reference inputs or op-amp bias networks without external buffering. |
| Long-Term Stability | 25 ppm/1000 hrs (DBV package); limits calibration drift in safety-critical BMS and traction inverter feedback loops. |
Pinout & Package
REF3425SQDBVRQ1 is packaged in a 6-pin SOT-23 (DBV) with 2.90 mm × 1.60 mm body size, rated for −40°C to +125°C operation and AEC-Q100 Grade 1 qualification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND_F | Ground force connection | Low-impedance return path for output current; separates from sense ground to reject PCB trace IR drop. |
| GND_S | Ground sense connection | Reference ground for internal regulation; connects to clean analog ground plane to maintain accuracy. |
| EN | Enable input | Active-high digital control (≥1.6 V) enabling shutdown mode with 3 µA quiescent current. |
| OUT_F | Output force connection | High-current output driver; delivers ±10 mA while isolating load transients from sensing path. |
| IN | Power input | Accepts 2.55 V to 12 V supply; dropout voltage is 50 mV at zero load, 500 mV at 10 mA. |
| OUT_S | Output sense connection | High-impedance feedback node; connects directly to ADC VREF+ to eliminate routing error. |
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 - meets automotive reliability requirements. |
| Force-sense output architecture | Separates OUT_F (drive) and OUT_S (sense) pins to eliminate voltage error from PCB trace resistance under load. |
| Low 0.1–10 Hz noise | 3.8 µVPP/V enables <16-bit effective resolution in slow-sampling systems like battery cell monitoring. |
| Thermal hysteresis control | ≤30 ppm after first thermal cycle (DBV package); ensures repeatable reference voltage after cold-start/warm-up cycles. |
| Shutdown mode current | 3 µA max with EN = low; allows system-level power gating without sacrificing reference integrity during sleep states. |
Applications
| Body Control Modules | On-Board Chargers |
|---|---|
Use Scenario: Monitoring 12V battery health, door lock actuator currents, and HVAC sensor signals in distributed vehicle ECUs. IC Role / Device Role / Timing Role: Precision 2.5 V reference for multi-channel SAR ADCs (e.g., ADS7828-Q1) acquiring analog sensor data. Use Value: ±0.05% initial accuracy and 6 ppm/°C drift ensure consistent measurement across cabin temperature extremes without recalibration. |
Use Scenario: Providing stable reference for isolated voltage/current sensing in bidirectional AC/DC conversion stages. IC Role / Device Role / Timing Role: Low-noise 2.5 V reference for sigma-delta ADCs measuring grid-side and battery-side voltages. Use Value: 3.8 µVPP/V noise and 25 ppm/1000 hrs stability maintain measurement fidelity during long-duration charging cycles. |
| Traction Inverters | Battery Management Systems |
Use Scenario: Supporting real-time motor phase current sensing and DC-link voltage monitoring in EV powertrains. IC Role / Device Role / Timing Role: Force-sense 2.5 V reference for high-speed ADCs capturing IGBT gate drive feedback and shunt amplifier outputs. Use Value: OUT_F/OUT_S separation eliminates load-induced error during fast transient current events, preserving closed-loop control accuracy. |
Use Scenario: Calibrating cell voltage measurements across 96-cell stacks in high-voltage EV batteries. IC Role / Device Role / Timing Role: Primary reference for precision 24-bit delta-sigma ADCs (e.g., ADS131M04-Q1) in BMS analog front-ends. Use Value: 25 ppm/1000 hrs long-term stability and ≤30 ppm thermal hysteresis reduce recalibration frequency and improve SoH estimation accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3425QDBVRQ1 | Same 2.5 V output, ±0.05% accuracy, and 6 ppm/°C drift, but lacks ENABLE pin and force-sense architecture (single OUT pin). | Not suitable for high-accuracy load-regulated systems requiring OUT_F/OUT_S separation or dynamic power gating. | Select REF3425SQDBVRQ1 when force-sense topology or shutdown control is required; choose REF3425QDBVRQ1 only for cost-sensitive, static-bias applications. |
| MAX6025AEUR+T | 2.5 V, ±0.1% initial accuracy, 15 ppm/°C drift, no enable pin, SOT-23-5 package, not AEC-Q100 qualified. | Limited to industrial or non-safety-critical automotive sub-systems due to lack of automotive qualification and higher drift. | Use MAX6025AEUR+T only in non-automotive designs where AEC-Q100 compliance and <6 ppm/°C drift are not mandatory. |
Compared with REF3425QDBVRQ1 and MAX6025AEUR+T, REF3425SQDBVRQ1 uniquely combines AEC-Q100 Grade 1 qualification, force-sense output, enable control, and 6 ppm/°C drift - making it the only option for ASIL-B–compliant BMS and traction inverter reference design.
Availability
REF3425SQDBVRQ1 is available at Aetrix Electronics and suitable for body control modules, on-board chargers, and battery management systems requiring stable component supply with automotive-grade reliability and traceable sourcing.
Supply support for REF3425SQDBVRQ1 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 is designed specifically for high-accuracy, low-drift voltage referencing in automotive safety-critical systems including ADAS, electrified powertrains, and battery monitoring - emphasizing AEC-Q100 qualification, long-term stability, and noise performance.
FAQ
What is the maximum input voltage for REF3425SQDBVRQ1?
The absolute maximum input voltage for REF3425SQDBVRQ1 is 13 V, but the recommended operating maximum is 12 V per the datasheet's Recommended Operating Conditions table. Exceeding 12 V may increase power dissipation and thermal stress, especially at high ambient temperatures or load currents. The device maintains specified performance up to 12 V across its full −40°C to +125°C operating range.
Does REF3425SQDBVRQ1 support force-sense configuration?
Yes, REF3425SQDBVRQ1 explicitly supports force-sense configuration via dedicated OUT_F (force) and OUT_S (sense) pins, along with separate GND_F and GND_S connections. This architecture isolates the high-current output path from the precision voltage sensing path, eliminating errors caused by PCB trace resistance and ensuring stable 2.5 V reference accuracy under varying load conditions.
What is the thermal hysteresis performance of REF3425SQDBVRQ1?
REF3425SQDBVRQ1 in the DBV (SOT-23-6) package exhibits ≤30 ppm thermal hysteresis after the first −40°C → +125°C → 25°C temperature cycle, and ≤10 ppm after the second cycle. This is measured per JEDEC JESD22-A103 and documented in Section 7.5 of the SBAS901C datasheet - critical for repeatable calibration in automotive ADAS and BMS applications.
Is REF3425SQDBVRQ1 qualified for automotive use?
Yes, REF3425SQDBVRQ1 is AEC-Q100 qualified for Grade 1 (−40°C to +125°C ambient), with HBM ESD rating of ±2500 V and CDM rating of ±1500 V. It is explicitly designated for automotive applications including body control modules, on-board chargers, traction inverters, and battery management systems - meeting functional safety requirements for ASIL-B–level subsystems.
What is the typical 0.1 Hz to 10 Hz noise of REF3425SQDBVRQ1?
The typical 0.1 Hz to 10 Hz output voltage noise of REF3425SQDBVRQ1 is 3.8 µVPP/V, as specified in Section 7.5 of the SBAS901C datasheet. This low noise level supports high-resolution data acquisition in automotive systems such as battery cell voltage monitoring and motor current sensing, where sub-µV noise is essential for maintaining effective resolution.
REF3425SQDBVRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- 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:
- 3V ~ 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-23-5
REF3425SQDBVRQ1 FAQ
1.How can I place an order for REF3425SQDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for REF3425SQDBVRQ1 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 REF3425SQDBVRQ1 reliable?
The price and inventory of REF3425SQDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF3425SQDBVRQ1 is usually 5 days.
3.What payment methods are accepted for REF3425SQDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF3425SQDBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF3425SQDBVRQ1?
REF3425SQDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF3425SQDBVRQ1 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 REF3425SQDBVRQ1?
For technical support, including REF3425SQDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF3425SQDBVRQ1 requirements.
6.How does Aetrix verify that REF3425SQDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All REF3425SQDBVRQ1 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 REF3425SQDBVRQ1 meets industry standards.
7.What is the process for return or replacement of REF3425SQDBVRQ1?
All REF3425SQDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with REF3425SQDBVRQ1, 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 REF3425SQDBVRQ1 part is unused and in its original packaging.
Return procedure for REF3425SQDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF3425SQDBVRQ1 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
-
AZ431LANTR-G1
Diodes Incorporated
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