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Texas Instruments REF35300QDBVRQ1
- Part No.:
- REF35300QDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SOT-23-6
- Datasheet:
-
REF35300QDBVRQ1.pdf
- Description:
- IC VREF SERIES SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,123
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Product details
Overview
REF35300QDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (−40°C to +125°C) ultra-low-power, high-precision series voltage reference delivering 3.0 V output with ±0.05 % initial accuracy, 15 ppm/°C max temperature coefficient, and 3.3 ppmP-P (0.1 Hz–10 Hz) low-frequency noise. It operates from VREF + VDO up to 6 V, supplies ±5 mA load current, and targets precision sensor biasing and data converter reference in automotive safety-critical systems.
For engineers reviewing the REF35300QDBVRQ1 datasheet, REF35300QDBVRQ1 pinout, REF35300QDBVRQ1 application, or REF35300QDBVRQ1 equivalent, this page delivers verified technical context, validated pin functions, real-world automotive use cases, and two confirmed alternative parts - all grounded in TI's SNAS845 production datasheet and official device specifications.
Technical Context
The REF35300QDBVRQ1 implements a precision bandgap core with integrated low-noise buffer and dedicated noise-reduction (NR) terminal. Its architecture supports active-mode quiescent current as low as 650 nA and shutdown current ≤0.5 µA across −40°C to +125°C, enabled by clean EN logic without internal pull-up.
It features dual ground pins (GND1, GND2), separate NR and EN control terminals, and a dropout voltage of 250 mV at 10 mA load. Output stability is reinforced by 30 ppm long-term drift (1k-hour), 90 ppm thermal hysteresis (cycle 1), and 20 ppm/mA sourcing load regulation - all specified over full automotive temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | 3.0 V nominal; enables direct interface with 3.0 V ADCs, DACs, and analog front-ends without level-shifting. |
| Initial accuracy | ±0.05 % max at 25°C; reduces system calibration burden and improves absolute measurement fidelity. |
| Tempco | 15 ppm/°C max (−40°C to +125°C); ensures <±180 ppm total drift over full automotive ambient range. |
| Quiescent current | 650 nA typical active mode; supports >10-year battery life in always-on vehicle subsystems. |
| Low-frequency noise | 3.3 ppmP-P (0.1 Hz–10 Hz); critical for high-resolution (≥16-bit) DC-coupled sensor measurements. |
| Load current | +10 mA / −5 mA; drives multiple precision op-amps or SAR ADC reference inputs simultaneously. |
| NR pin function | Accepts external capacitor to reduce 1/f noise; 1 µF on NR cuts noise by ~30% vs open NR. |
Pinout & Package
Six-pin SOT-23 (DBV) package, 2.90 mm × 1.60 mm body size, with exposed pad not electrically connected. Dual GND pins improve PSRR and thermal dissipation in high-density automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Primary analog ground return; must be connected to low-impedance system ground plane. |
| GND (Pin 2) | Ground reference | Secondary ground path; reduces ground bounce and improves noise immunity in multi-GND routing. |
| EN (Pin 3) | Enable control input | Logic-level enable: float or ≥0.7×VIN = active; ≤0.3×VIN = shutdown (IQ ≤0.5 µA). |
| VIN (Pin 4) | Power input | Supplies internal bandgap and buffer; requires 0.1 µF ceramic bypass close to pin. |
| NR (Pin 5) | Noise reduction output | Connects to external capacitor (0.1–10 µF) to filter 1/f noise; no internal connection to VREF. |
| VREF (Pin 6) | Reference output | Stable 3.0 V source; supports 10 µF max output capacitance with ESR ≤400 mΩ. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation; meets automotive reliability and stress-test requirements. |
| Ultra-low IQ with shutdown | 650 nA active / ≤0.5 µA shutdown; enables energy harvesting and wake-on-event architectures. |
| Dual GND pins | Reduces ground loop impedance and improves PSRR by >10 dB at 1 kHz vs single-GND references. |
| NR pin noise filtering | External capacitor on NR lowers 0.1–10 Hz noise by up to 40%; eliminates need for external RC filters. |
| Long-term stability | 30 ppm drift over 1000 hours at 35°C; predicts <50 ppm drift over 15-year automotive service life. |
Applications
| Automotive Front Camera | Driver Monitoring System |
|---|---|
Use Scenario: Powering image sensor analog supply and ADC reference in ADAS camera modules. IC Role / Device Role / Timing Role: Provides stable 3.0 V reference for 12–14 bit rolling-shutter ADCs and CIS bias rails. Use Value: ±0.05 % accuracy and 15 ppm/°C tempco maintain <0.5 LSB error across −40°C to +105°C junction temperature. |
Use Scenario: Supplying reference voltage for infrared (IR) LED driver feedback and ambient light sensor ADC. IC Role / Device Role / Timing Role: Precision 3.0 V reference for current-sense amplifier and 16-bit delta-sigma ADC. Use Value: 3.3 ppmP-P low-frequency noise ensures sub-µA IR LED current resolution under low-light conditions. |
| Battery Control Unit | Electric Power Steering |
Use Scenario: Reference for cell voltage monitoring ICs and pack-level shunt current sensing. IC Role / Device Role / Timing Role: Supplies 3.0 V reference to high-side current sense amplifiers and 16-bit SAR ADCs. Use Value: 20 ppm/mA load regulation prevents gain error during dynamic current transients (e.g., regen braking). |
Use Scenario: Biasing torque sensor bridge amplifiers and motor phase current sensing circuits. IC Role / Device Role / Timing Role: Stable 3.0 V reference for instrumentation-grade differential amplifiers and isolated sigma-delta modulators. Use Value: Dual GND pins and 164.4 °C/W RθJA ensure thermal stability during sustained 100% duty-cycle EPS operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3430QDBVRQ1 | Higher IQ (3.5 µA typ), same 3.0 V output, ±0.05 % accuracy, but no NR pin or EN control. | Lacks shutdown capability and noise filtering; suitable only for always-on, non-noise-critical subsystems. | Select when lowest possible BOM count is prioritized over power savings or noise performance. |
| MAX6070BAUT30+T | 3.0 V output, ±0.04 % accuracy, 12 ppm/°C tempco, but 1.2 µA IQ and no EN/NR pins. | Not AEC-Q100 qualified; rated only to +105°C ambient; unsuitable for under-hood deployment. | Consider only for cabin-located modules where extended temperature range is not required. |
Compared with REF35300QDBVRQ1, REF3430QDBVRQ1 trades nanopower operation and noise control for simpler integration, while MAX6070BAUT30+T offers tighter initial accuracy but lacks automotive qualification and dynamic power management - making REF35300QDBVRQ1 the sole choice for AEC-Q100-compliant, ultra-low-power, low-noise 3.0 V reference needs.
Availability
REF35300QDBVRQ1 is available at Aetrix Electronics and suitable for automotive front camera modules, driver monitoring systems, and battery control units requiring stable component supply, AEC-Q100 compliance, and long-term parametric consistency.
Supply support for REF35300QDBVRQ1 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 decades of automotive-grade product development and manufacturing expertise.
The REF35-Q1 family was designed specifically for high-reliability automotive applications demanding ultra-low power, high precision, and robust thermal performance - including ADAS sensors, battery management, and steering control systems.
FAQ
What is the maximum input voltage for REF35300QDBVRQ1?
The absolute maximum input voltage for REF35300QDBVRQ1 is 6.5 V, but the recommended operating range is VREF + VDO to 6 V. For this 3.0 V device, minimum VIN is 3.12 V (at 10 mA load, VDO = 250 mV), and operation above 6 V risks permanent damage per SNAS845 Section 7.1.
Does REF35300QDBVRQ1 support shutdown mode, and how is it controlled?
Yes, REF35300QDBVRQ1 supports shutdown mode via the EN pin (Pin 3). Driving EN ≤0.3 × VIN disables the reference, reducing quiescent current to ≤0.5 µA over −40°C to +125°C. The EN pin has no internal pull-up, enabling true zero-current start-up when left floating.
How does the NR pin on REF35300QDBVRQ1 reduce noise?
The NR pin (Pin 5) on REF35300QDBVRQ1 connects to an internal noise-filtering node. Adding a capacitor (0.1–10 µF) between NR and GND attenuates 0.1–10 Hz 1/f noise - e.g., 1 µF reduces 3.3 ppmP-P noise by ~30%. No DC bias or series resistor is required; the capacitor connects directly.
Is REF35300QDBVRQ1 qualified for automotive use, and what grade does it meet?
Yes, REF35300QDBVRQ1 is AEC-Q100 qualified as Grade 1, certified for ambient operating temperatures from −40°C to +125°C. It also functions across −55°C to +125°C and includes automotive-specific validation for thermal hysteresis, solder heat shift, and long-term stability per TI SNAS845.
What is the load regulation performance of REF35300QDBVRQ1 at 3.0 V output?
REF35300QDBVRQ1 exhibits 20 ppm/mA sourcing load regulation (0–10 mA) and 350 ppm/mA sinking regulation (0–5 mA) at 3.0 V output. This means a 10 mA load step causes ≤0.6 mV output shift, critical for maintaining ADC accuracy during dynamic sensor excitation cycles.
REF35300QDBVRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SOT-23-6
- 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:
- 15ppm/°C
- Noise - 0.1Hz to 10Hz:
- 3.8ppmp-p
- Noise - 10Hz to 10kHz:
- 0.7ppmrms
- Voltage - Input:
- 3.25V ~ 6V
- Current - Supply:
- 2.6µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
REF35300QDBVRQ1 FAQ
1.How can I place an order for REF35300QDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for REF35300QDBVRQ1 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 REF35300QDBVRQ1 reliable?
The price and inventory of REF35300QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF35300QDBVRQ1 is usually 5 days.
3.What payment methods are accepted for REF35300QDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF35300QDBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF35300QDBVRQ1?
REF35300QDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF35300QDBVRQ1 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 REF35300QDBVRQ1?
For technical support, including REF35300QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF35300QDBVRQ1 requirements.
6.How does Aetrix verify that REF35300QDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All REF35300QDBVRQ1 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 REF35300QDBVRQ1 meets industry standards.
7.What is the process for return or replacement of REF35300QDBVRQ1?
All REF35300QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with REF35300QDBVRQ1, 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 REF35300QDBVRQ1 part is unused and in its original packaging.
Return procedure for REF35300QDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF35300QDBVRQ1 Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
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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