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Texas Instruments REF35180QDBVRQ1
- Part No.:
- REF35180QDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SOT-23-6
- Datasheet:
-
REF35180QDBVRQ1.pdf
- Description:
- IC VREF SERIES 1.8V SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,493
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Product details
Overview
REF35180QDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (−40°C to +125°C) ultra-low-power, high-precision series voltage reference delivering 1.8 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 to 6 V, supplies ±5 mA load current, and targets precision sensor biasing and data converter reference in automotive ADAS subsystems.
For engineers reviewing the REF35180QDBVRQ1 datasheet, REF35180QDBVRQ1 pinout, REF35180QDBVRQ1 application, or REF35180QDBVRQ1 equivalent, key selection criteria include its nanopower 650 nA quiescent current, NR pin for configurable noise reduction, EN pin for shutdown control, SOT-23-6 package compatibility, and AEC-Q100 qualification for automotive front camera and battery control unit use.
Technical Context
The REF35180QDBVRQ1 implements a precision bandgap core with buffered output and integrated enable logic, supporting active and shutdown modes via a clean EN architecture that draws only 0.1 µA in shutdown. Its low dropout voltage (120 mV at 5 mA, 250 mV at 10 mA) enables operation from single-cell LiFePO4 or dual-cell alkaline supplies.
It features dual ground pins (GND1, GND2) for improved PSRR and thermal stability, an NR pin enabling external capacitor filtering to reduce 1/f noise, and specified performance across −40°C to +125°C ambient with functional operation down to −55°C. Load regulation is 20 ppm/mA (source) and 40 ppm/mA (sink), and line regulation is ≤160 ppm/V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | 1.8 V ±0.05 % - stable reference for 12–16-bit ADCs requiring sub-LSB error budget |
| Quiescent current | 650 nA typical - enables >10-year battery life in always-on automotive sensors |
| Tempco | 15 ppm/°C max (−40°C to +125°C) - limits drift to <1.8 mV over full automotive range |
| Low-frequency noise | 3.3 ppmP-P (0.1–10 Hz) - supports high-resolution DC measurements without averaging penalty |
| Load current | +10 mA / −5 mA - drives multiple op-amps or SAR ADC references directly |
| Input voltage range | VREF + VDO to 6 V - supports 2.5–6 V supply rails with 120–250 mV headroom |
| Long-term stability | 30 ppm at 1k hour - ensures calibration integrity in safety-critical ECU modules |
Pinout & Package
SOT-23-6 package (2.90 mm × 1.60 mm body size), thermally enhanced with dual ground terminals and exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Primary analog ground return; must be connected to low-impedance PCB ground plane |
| GND (Pin 2) | Ground reference | Secondary ground path to reduce ground bounce and improve PSRR |
| EN (Pin 3) | Enable control input | Logic-high or open = active; logic-low = shutdown (0.1 µA IQ); no internal pull-up |
| VIN (Pin 4) | Power input | Supplies internal bandgap and buffer; requires 0.1 µF ceramic decoupling close to pin |
| NR (Pin 5) | Noise reduction node | Accepts external capacitor (1–10 µF) to suppress 1/f noise; connects to internal filter node |
| VREF (Pin 6) | Precision output | 1.8 V regulated reference; drives up to 10 mA; requires 0.1–10 µF output capacitance |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation in automotive ECUs per stress test requirements |
| NR pin with external capacitor support | Reduces 0.1–10 Hz noise by up to 50 % when 1–10 µF is placed on Pin 5 |
| Clean EN architecture | Zero static current draw when EN is grounded; no pull-up leakage or startup glitches |
| Dual GND pins | Minimizes ground loop impedance and improves thermal stability under dynamic load |
| Low dropout at full load | 250 mV max at 10 mA allows use with 2.05 V minimum input (e.g., aged LiFePO4) |
Applications
| Automotive Front Camera | Driver Monitoring System |
|---|---|
Use Scenario: Provides stable bias voltage for CMOS image sensor analog front-end and ISP power domains. IC Role / Device Role / Timing Role: Precision 1.8 V reference for ADCs digitizing pixel data and for LDO feedback networks. Use Value: Enables <1 LSB INL error in 14-bit image processing pipelines despite wide temperature swings and EMI exposure. | Use Scenario: Supplies reference for infrared LED driver current sensing and cabin ambient light sensor conditioning. IC Role / Device Role / Timing Role: Low-noise 1.8 V source for transimpedance amplifiers and delta-sigma ADCs measuring driver attentiveness. Use Value: Maintains <±0.5 % gain accuracy over lifetime, critical for ISO 26262 ASIL-B functional safety compliance. |
| Battery Control Unit | Electric Power Steering |
Use Scenario: References cell voltage monitoring circuits and pack-level SOC estimation ADCs in 12 V/48 V hybrid systems. IC Role / Device Role / Timing Role: High-stability 1.8 V reference for multiplexed 16-bit SAR converters sampling up to 16 cells. Use Value: Limits long-term drift to 30 ppm over 1000 hours, reducing recalibration frequency and extending service intervals. | Use Scenario: Powers torque sensor signal conditioning and motor phase current shunt amplifier references. IC Role / Device Role / Timing Role: Low-quiescent-current 1.8 V reference for isolated sigma-delta modulators feeding MCU-based motor controllers. Use Value: Delivers 650 nA IQ to extend standby time during vehicle sleep mode while meeting ASIL-C diagnostic coverage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3418QDBVRQ1 | Higher IQ (3.5 µA typ), no NR pin, 20 ppm/°C tempco, same SOT-23-6 package | Lacks noise-reduction capability; less suitable for ultra-low-noise sensor front-ends | Select when cost sensitivity outweighs need for sub-ppm noise or lowest possible IQ |
| MAX6070BAUT18+T | 600 nA IQ, 10 ppm/°C tempco, 2.5 ppmP-P noise, SOT-23-6, but not AEC-Q100 qualified | Not automotive-qualified; limited to industrial or consumer applications | Select only for non-automotive designs where AEC-Q100 is not required |
Compared with REF3418QDBVRQ1 and MAX6070BAUT18+T, REF35180QDBVRQ1 uniquely combines AEC-Q100 Grade 1 qualification, nanopower operation, and NR-pin-enabled noise tailoring-making it the only choice for ASIL-B/C automotive sensor references demanding both longevity and precision.
Availability
REF35180QDBVRQ1 is available at Aetrix Electronics and suitable for automotive front camera, battery control unit, and electric power steering applications requiring stable component supply, long-lifecycle assurance, and AEC-Q100-compliant sourcing.
Supply support for REF35180QDBVRQ1 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 precision analog ICs and automotive-grade components.
The REF35-Q1 product line delivers nanopower, high-accuracy voltage references engineered specifically for ASIL-B/C automotive subsystems-including ADAS cameras, battery management, and steering control-where low drift, low noise, and guaranteed reliability across extreme temperatures are mandatory.
FAQ
What is the maximum input voltage for REF35180QDBVRQ1?
The absolute maximum input voltage for REF35180QDBVRQ1 is 6.5 V, but the recommended operating range is VREF + VDO to 6 V. With VREF = 1.8 V and VDO ≤ 250 mV, the minimum valid VIN is 2.05 V. Operating above 6 V risks permanent damage per Absolute Maximum Ratings.
How does the NR pin on REF35180QDBVRQ1 reduce noise?
The NR pin on REF35180QDBVRQ1 connects internally to a noise-filtering node; adding a 1–10 µF capacitor between NR and GND attenuates 0.1–10 Hz 1/f noise by up to 50 %. REF35180QDBVRQ1 achieves 3.3 ppmP-P base noise, and with 10 µF on NR, typical noise drops to ~1.7 ppmP-P, verified in TI's SNAS845 characterization data.
Is REF35180QDBVRQ1 pin-compatible with other REF35-Q1 variants?
Yes, all REF35-Q1 variants-including REF35180QDBVRQ1, REF35250QDBVRQ1, and REF35330QDBVRQ1-share identical SOT-23-6 (DBV) pinout, thermal footprint, and electrical interface. Only the output voltage differs; no PCB layout change is needed when swapping within the family for design flexibility.
What is the load regulation specification for REF35180QDBVRQ1?
REF35180QDBVRQ1 has load regulation of 20 ppm/mA (source, 0–10 mA) and 40 ppm/mA (sink, 0–5 mA). At 10 mA output, this equates to a worst-case ΔVREF of ±20 µV, ensuring stable reference performance across dynamic sensor biasing loads without external buffering.
Does REF35180QDBVRQ1 support operation below −40°C?
REF35180QDBVRQ1 is fully specified from −40°C to +125°C (Grade 1), but its functional operating range extends to −55°C. Electrical characteristics such as initial accuracy and tempco are not guaranteed below −40°C; however, the device remains powered and operational, enabling cold-cranking support in battery management systems.
REF35180QDBVRQ1 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):
- 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 15ppm/°C
- Noise - 0.1Hz to 10Hz:
- 3.3ppmp-p
- Noise - 10Hz to 10kHz:
- 0.7ppmrms
- Voltage - Input:
- 2.05V ~ 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
REF35180QDBVRQ1 FAQ
1.How can I place an order for REF35180QDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for REF35180QDBVRQ1 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 REF35180QDBVRQ1 reliable?
The price and inventory of REF35180QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF35180QDBVRQ1 is usually 5 days.
3.What payment methods are accepted for REF35180QDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF35180QDBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF35180QDBVRQ1?
REF35180QDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF35180QDBVRQ1 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 REF35180QDBVRQ1?
For technical support, including REF35180QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF35180QDBVRQ1 requirements.
6.How does Aetrix verify that REF35180QDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All REF35180QDBVRQ1 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 REF35180QDBVRQ1 meets industry standards.
7.What is the process for return or replacement of REF35180QDBVRQ1?
All REF35180QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with REF35180QDBVRQ1, 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 REF35180QDBVRQ1 part is unused and in its original packaging.
Return procedure for REF35180QDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF35180QDBVRQ1 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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