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Texas Instruments REF3430SQDBVRQ1
- Part No.:
- REF3430SQDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
REF3430SQDBVRQ1.pdf
- Description:
- IC VREF SERIES 0.05% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,971
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Product details
Overview
REF3430SQDBVRQ1 from Texas Instruments is a precision AEC-Q100 Grade 1 automotive voltage reference delivering 3.0 V output with ±0.05% initial accuracy, 6 ppm/°C max temperature coefficient, and ±10 mA load capability - deployed in battery management systems and traction inverters requiring stable, low-noise analog references.
For engineers reviewing the REF3430SQDBVRQ1 datasheet, REF3430SQDBVRQ1 pinout, REF3430SQDBVRQ1 application, or REF3430SQDBVRQ1 equivalent, this page delivers verified package mapping (SOT-23-5), confirmed enable-controlled shutdown (3 µA), low 3.8 µVPP/V 0.1–10 Hz noise, and validated alternatives for high-reliability automotive signal chains.
Technical Context
The REF3430SQDBVRQ1 implements a CMOS bandgap core with dual-output force/sense architecture to minimize thermal and layout-induced errors. Its enable pin controls active mode (72–95 µA IQ) and shutdown mode (≤3 µA), with EN logic thresholds defined at 1.6 V (high) and 0.5 V (low).
It operates across −40°C to +125°C with 50 mV dropout at zero load and supports capacitive loads from 0.1 µF to 10 µF. Output stability is reinforced by 25 ppm/1000 hrs long-term drift and ≤30 ppm thermal hysteresis (Cycle 1, DBV package).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal - precisely sets ADC/DAC reference level for 12–16-bit automotive data acquisition. |
| Initial Accuracy | ±0.05% max - eliminates need for post-production trimming in body control modules and ADAS sensor interfaces. |
| Temp Coefficient | 6 ppm/°C max - ensures ≤0.72 mV total drift over −40°C to +125°C ambient range. |
| Quiescent Current | 95 µA max active / 3 µA max shutdown - enables ultra-low-power wake-up modes in OBC and BMS standby states. |
| Output Noise | 3.8 µVPP/V (0.1–10 Hz) - preserves SNR in high-resolution converters like ADS7828-Q1 without external filtering. |
| Load Current | ±10 mA - drives multiple SAR ADC references or op-amp bias networks without external buffers. |
| Input Voltage Range | 3.05 V to 12 V - accommodates wide-input DC/DC outputs in 12 V and 48 V vehicle architectures. |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm footprint, surface-mount, thermally enhanced for automotive under-hood use.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 NC | No internal connection | Must be left floating or tied to GND per layout guidelines; no electrical function. |
| 2 GND | Ground reference | Primary ground return path for reference core and output buffer; connects to system AGND plane. |
| 3 IN | Power input | Accepts 3.05–12 V supply; dropout as low as 50 mV enables operation near battery minimum. |
| 4 NIC | No internal connection | Unused terminal; electrically isolated - avoid routing signals or power near this pin. |
| 5 OUT | Voltage reference output | 3.0 V precision output sourcing/sinking ±10 mA; low noise and hysteresis support metrology-grade accuracy. |
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 safety-critical reliability requirements. |
| Enable-controlled shutdown | EN pin reduces quiescent current to ≤3 µA while placing output in high-impedance state - critical for low-power sleep modes in ADAS ECUs. |
| Dual-path output architecture | Force/sense topology (in 6-pin/8-pin variants) not present in REF3430SQDBVRQ1's 5-pin variant; this SOT-23-5 uses single OUT pin optimized for space-constrained layouts. |
| Low thermal hysteresis | ≤30 ppm (Cycle 1) after −40°C ↔ +125°C cycling - maintains calibration integrity across repeated thermal cycles in engine bay applications. |
| Stable with ceramic capacitors | Operates reliably with 0.1–10 µF X7R/X5R MLCCs - eliminates need for tantalum or electrolytic output caps in compact automotive PCBs. |
Applications
| Body Control Modules | Traction Inverters |
|---|---|
Use Scenario: Reference voltage for current-sense amplifiers and isolated gate drivers monitoring motor phase currents. IC Role / Device Role / Timing Role: Precision 3.0 V reference for bidirectional shunt-based current measurement and PWM timing synchronization. Use Value: 6 ppm/°C drift and 3.8 µVPP/V noise ensure <±0.1% current measurement error across full drivetrain temperature range. |
Use Scenario: Stable reference for ADCs sampling DC-link voltage and IGBT collector-emitter sensing circuits. IC Role / Device Role / Timing Role: Low-drift, low-noise analog reference enabling accurate real-time voltage regulation and fault detection. Use Value: ±0.05% initial accuracy and 25 ppm/1000 hrs long-term stability reduce recalibration frequency in high-voltage inverter stacks. |
| Battery Management Systems | Advanced Driver Assistance Systems |
Use Scenario: Reference for cell voltage monitoring ICs (e.g., BQ796xx-Q1) in 12–100-cell EV battery packs. IC Role / Device Role / Timing Role: Primary voltage reference for multi-channel SAR ADCs performing simultaneous cell voltage acquisition. Use Value: ±10 mA drive strength supports daisy-chained reference distribution across stacked monitor boards without gain error accumulation. |
Use Scenario: Reference for radar signal chain ADCs (e.g., ADS7828-Q1) in 77 GHz front-end receivers. IC Role / Device Role / Timing Role: Low-noise, high-stability reference ensuring consistent dynamic range and SFDR in RF digitization paths. Use Value: 3.8 µVPP/V 0.1–10 Hz noise directly translates to <−105 dBc/Hz integrated phase noise floor in baseband processing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3430QDBVRQ1 | 6-pin SOT-23 with separate force/sense outputs (OUT_F/OUT_S); same 3.0 V, ±0.05%, 6 ppm/°C specs. | Enables Kelvin sensing for ultra-high-accuracy current measurement; requires extra PCB trace routing. | Select REF3430QDBVRQ1 when layout allows dual-output routing and measurement uncertainty must be minimized below 10 ppm. |
| MAX6070AUT30+T | 3.0 V, ±0.1% initial accuracy, 10 ppm/°C tempco, 12 µA IQ - not AEC-Q100 qualified; smaller SOT-23-3 package. | Limited to non-safety-critical infotainment or comfort systems; lacks automotive qualification and shutdown control. | Choose MAX6070AUT30+T only for cost-sensitive, non-automotive industrial designs where AEC-Q100 and low IQ are not required. |
Compared with REF3430QDBVRQ1, REF3430SQDBVRQ1 trades force/sense capability for minimal footprint and simplified routing - ideal for space-constrained BMS slave boards. Versus MAX6070AUT30+T, it delivers tighter accuracy, lower drift, automotive qualification, and enable control at modest size premium.
Availability
REF3430SQDBVRQ1 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, body control modules, and advanced driver assistance systems requiring stable component supply across extended automotive temperature ranges.
Supply support for REF3430SQDBVRQ1 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 deep expertise in automotive-grade precision analog solutions.
The REF34-Q1 product line was engineered specifically for AEC-Q100 Grade 1 automotive applications demanding ultra-low drift, low noise, and robust enable-controlled power management in harsh environments.
FAQ
What is the maximum input voltage for REF3430SQDBVRQ1?
The absolute maximum input voltage for REF3430SQDBVRQ1 is 13 V, but the recommended operating maximum is 12 V per the datasheet. Exceeding 12 V may increase power dissipation and thermal stress without functional benefit, especially given its 50 mV dropout at zero load. REF3430SQDBVRQ1 is designed to operate efficiently from 3.05 V up to 12 V across −40°C to +125°C.
Does REF3430SQDBVRQ1 support shutdown mode, and what is its current draw?
Yes, REF3430SQDBVRQ1 supports shutdown mode via its ENABLE pin. When EN is pulled low (≤0.5 V), the device enters shutdown with output placed in high-impedance state and quiescent current reduced to ≤3 µA maximum. This feature is fully characterized and AEC-Q100 validated for automotive standby operation. REF3430SQDBVRQ1 maintains this low-current state across the full −40°C to +125°C temperature range.
What is the 0.1 Hz to 10 Hz output voltage noise of REF3430SQDBVRQ1?
The peak-to-peak output voltage noise of REF3430SQDBVRQ1 over 0.1 Hz to 10 Hz is 3.8 µVPP/V, measured at 3.0 V output. This value is specified in the Electrical Characteristics table and confirmed in Figure 8-24 of the SBAS901C datasheet. The low noise performance makes REF3430SQDBVRQ1 suitable for driving high-resolution ADCs such as the ADS7828-Q1 without degrading effective resolution.
Is REF3430SQDBVRQ1 qualified for automotive applications?
Yes, REF3430SQDBVRQ1 is AEC-Q100 qualified as Grade 1, rated for −40°C to +125°C ambient operating temperature. It also meets HBM ESD classification Level 2 (±2500 V) and CDM Level C6 (±1500 V). These qualifications are explicitly documented in Section 1 of the REF34-Q1 datasheet (SBAS901C), confirming REF3430SQDBVRQ1 for use in safety-critical automotive subsystems including BMS and ADAS.
What package type does REF3430SQDBVRQ1 use, and what are its dimensions?
REF3430SQDBVRQ1 uses the 5-pin SOT-23 (DBV) package with nominal body dimensions of 2.90 mm × 1.60 mm × 1.15 mm. This package is distinct from the 6-pin DBV variant (REF3430QDBVRQ1) and the 8-pin VSSOP (DGK) variant. Pin configuration is verified per Figure 6-2 and Table 6-1 in the REF34-Q1 datasheet, confirming NC/GND/IN/NIC/OUT pinout for REF3430SQDBVRQ1.
REF3430SQDBVRQ1 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):
- 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-23-5
REF3430SQDBVRQ1 FAQ
1.How can I place an order for REF3430SQDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for REF3430SQDBVRQ1 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 REF3430SQDBVRQ1 reliable?
The price and inventory of REF3430SQDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF3430SQDBVRQ1 is usually 5 days.
3.What payment methods are accepted for REF3430SQDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF3430SQDBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF3430SQDBVRQ1?
REF3430SQDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF3430SQDBVRQ1 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 REF3430SQDBVRQ1?
For technical support, including REF3430SQDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF3430SQDBVRQ1 requirements.
6.How does Aetrix verify that REF3430SQDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All REF3430SQDBVRQ1 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 REF3430SQDBVRQ1 meets industry standards.
7.What is the process for return or replacement of REF3430SQDBVRQ1?
All REF3430SQDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with REF3430SQDBVRQ1, 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 REF3430SQDBVRQ1 part is unused and in its original packaging.
Return procedure for REF3430SQDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF3430SQDBVRQ1 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
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
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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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