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Texas Instruments REF3130AQDBZRQ1
- Part No.:
- REF3130AQDBZRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
REF3130AQDBZRQ1.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,113
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Product details
Overview
REF3130AQDBZRQ1 from Texas Instruments is an AEC-Q100 qualified, precision series voltage reference delivering 3.0 V output with ±0.2% initial accuracy, 15 ppm/°C max drift over –40°C to +125°C, and 115 µA max quiescent current - used as a stable reference for ADCs, sensors, and power monitoring in automotive battery management and ADAS radar systems.
For engineers reviewing the REF3130AQDBZRQ1 datasheet, REF3130AQDBZRQ1 pinout, REF3130AQDBZRQ1 application, or REF3130AQDBZRQ1 equivalent, key selection criteria include its 5 mV dropout, ±10 mA output drive capability, no-output-capacitor operation, and functional safety documentation support for ISO 26262-compliant designs.
Technical Context
The REF3130AQDBZRQ1 implements a CMOS bandgap architecture with curvature compensation to achieve low temperature drift. Its output voltage is derived from a weighted sum of a PTAT (proportional-to-absolute-temperature) voltage across R1 and the CTAT (complementary-to-absolute-temperature) base-emitter voltage of Q2, resulting in near-zero net temperature coefficient.
It operates as a series reference with input-to-output dropout as low as 5 mV under no-load conditions and supports bidirectional load current (±10 mA). Thermal hysteresis is specified at 100 ppm for first cycle and 25 ppm for additional cycles, and long-term stability is 70 ppm over 1000 hours.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.000 V ±0.2% (2.994–3.006 V) - enables accurate 12-bit+ ADC conversion without calibration. |
| Initial Accuracy | ±0.2% - eliminates need for post-manufacturing trimming in most automotive sensor signal chains. |
| Temp Drift (–40°C to +125°C) | ≤15 ppm/°C max - ensures ≤±0.45% total output variation across full automotive temperature range. |
| Quiescent Current | 115 µA max - supports >10-year battery life in always-on vehicle subsystems like BMS monitors. |
| Dropout Voltage | 5 mV min (unloaded), ≤50 mV max (full temp/load) - allows direct regulation from low-headroom supplies like 3.3 V LDO outputs. |
| Output Drive | ±10 mA - sufficient to drive SAR ADC reference inputs, op-amp bias networks, and small logic loads without buffering. |
| Low-Frequency Noise | 39 µVP-P (0.1–10 Hz) - meets noise floor requirements for high-resolution 16-bit delta-sigma data acquisition. |
Pinout & Package
REF3130AQDBZRQ1 is housed in a 3-pin SOT-23 (DBZ) package measuring 2.92 mm × 2.37 mm, optimized for space-constrained automotive PCBs and compatible with standard SMT reflow profiles (MSL Level 1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input supply terminal | Accepts 3.05 V to 5.5 V supply; minimum headroom is 5 mV above VOUT for regulation. |
| 2 (OUT) | Reference output terminal | Delivers stable 3.0 V ±0.2%; sinks or sources up to ±10 mA; requires no external capacitor. |
| 3 (GND) | Ground reference terminal | Provides return path for internal bandgap circuitry and load current; must connect to clean analog ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation with HBM ±2 kV / CDM ±1 kV ESD robustness. |
| Functional safety documentation | Includes FIT rate, failure mode analysis, and diagnostic coverage guidance for ASIL-B system integration. |
| No output capacitor required | Eliminates 1–10 µF ceramic capacitor and associated board area, cost, and reliability risk in compact modules. |
| Low dropout (5 mV) | Enables use after low-dropout regulators or directly from battery-derived rails with minimal voltage margin. |
| High output current (±10 mA) | Drives multiple downstream ICs (e.g., ADC reference + op-amp bias + MCU VREF) without external buffer. |
Applications
| Automotive Battery Management System (BMS) | Radar Signal Conditioning |
|---|---|
Use Scenario: Monitoring cell voltages and pack current in HEV/EV traction batteries using isolated ΣΔ ADCs. IC Role / Device Role / Timing Role: Provides precise 3.0 V reference for 16-bit ADCs sampling shunt-based current and cell voltage measurements. Use Value: Enables <±10 mV absolute measurement error over lifetime and temperature, critical for SOC/SOH estimation accuracy. |
Use Scenario: Biasing RF front-end components and calibrating IF chain gain in 77-GHz automotive radar transceivers. IC Role / Device Role / Timing Role: Supplies stable reference to programmable gain amplifiers and DACs controlling LO phase alignment and receiver gain. Use Value: Maintains <0.01° phase error contribution under thermal cycling, preserving Doppler resolution and object detection fidelity. |
| Electric Power Steering (EPS) Control Unit | Front Camera Image Sensor Reference |
Use Scenario: Providing reference voltage to torque sensor signal conditioning and motor current sensing circuits in EPS ECUs. IC Role / Device Role / Timing Role: Delivers low-noise, drift-stable 3.0 V to instrumentation amplifiers and sigma-delta converters digitizing analog torque feedback. Use Value: Limits torque measurement drift to <0.2% FS over 15-year vehicle life, ensuring consistent steering assist response. |
Use Scenario: Supplying reference to image sensor ADCs and ISP analog front ends in ADAS front-facing cameras. IC Role / Device Role / Timing Role: Acts as master reference for 12-bit column-parallel ADCs converting pixel data in rolling-shutter CMOS sensors. Use Value: Reduces fixed-pattern noise by maintaining <1 LSB INL variation across temperature, improving low-light dynamic range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3430RTER | Higher accuracy (±0.05%), lower drift (6 ppm/°C), but higher IQ (350 µA) and larger 6-pin WSON package. | Better suited for lab-grade instrumentation; less optimal for battery-powered or space-constrained automotive modules. | Select REF3430RTER only when sub-0.1% total error budget is mandatory and power/package constraints allow. |
| MAX6033AESA30+ | Same 3.0 V output and SOT-23 package, but wider drift spec (20 ppm/°C max) and no AEC-Q100 qualification. | Limited to industrial or non-safety-critical automotive infotainment subsystems; not approved for powertrain or ADAS. | Choose MAX6033AESA30+ only for cost-sensitive, non-automotive applications where AEC-Q100 is not required. |
Compared with REF3130AQDBZRQ1, REF3430RTER offers superior accuracy at the expense of power and size, while MAX6033AESA30+ trades automotive qualification and drift performance for lower unit cost - making REF3130AQDBZRQ1 the balanced choice for production-grade automotive electronics requiring AEC-Q100 compliance, low IQ, and SOT-23 footprint.
Availability
REF3130AQDBZRQ1 is available at Aetrix Electronics and suitable for automotive battery management systems, ADAS radar modules, electric power steering control units, and front camera image sensor interfaces requiring stable component supply across extended temperature and lifecycle demands.
Supply support for REF3130AQDBZRQ1 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, industrial, and power management ICs.
The REF31xx-Q1 product line was designed specifically for AEC-Q100-compliant automotive applications demanding high accuracy, ultra-low power, and robust thermal performance in harsh environments - including battery monitoring, radar, and ADAS sensor signal chains.
FAQ
What is the maximum operating temperature range for the REF3130AQDBZRQ1?
The REF3130AQDBZRQ1 is rated for continuous operation from –40°C to +125°C ambient temperature, fully qualified per AEC-Q100 Grade 1 requirements. This range covers under-hood and cabin-mounted automotive electronics, including battery management systems and radar modules where junction temperatures may approach 150°C under worst-case power dissipation and airflow conditions. The REF3130AQDBZRQ1 maintains specified electrical performance across this full range.
Does the REF3130AQDBZRQ1 require an output capacitor for stability?
No, the REF3130AQDBZRQ1 does not require an output capacitor for stability - it is internally compensated and remains stable with zero load capacitance. This eliminates component count, board area, and potential reliability risks associated with ceramic capacitors. However, if an output capacitor is added for noise filtering, TI recommends using one with ESR ≥ 0.5 Ω to avoid instability. The REF3130AQDBZRQ1's no-capacitor operation is verified across all load and temperature conditions in the datasheet.
What is the minimum supply voltage needed for the REF3130AQDBZRQ1 to regulate properly?
The REF3130AQDBZRQ1 requires a minimum supply voltage of VOUT + 5 mV (i.e., 3.005 V) under no-load conditions to maintain regulation. With load current, the required headroom increases - for example, at ±10 mA output, dropout rises to ≤50 mV. Therefore, for full 3.0 V output regulation across temperature and load, VIN must be ≥3.05 V (no load) to ≥3.05 V (worst-case loaded). This ultra-low dropout enables use after low-headroom LDOs or directly from battery-derived rails.
How does the REF3130AQDBZRQ1 support functional safety in automotive systems?
The REF3130AQDBZRQ1 is designated "functional safety-capable": TI provides documented FIT rate, failure mode effects analysis (FMEA), and diagnostic coverage guidance to aid ISO 26262 ASIL-B system design. It includes built-in ESD protection (HBM ±2 kV, CDM ±1 kV) and thermal shutdown behavior characterized across temperature. While the REF3130AQDBZRQ1 itself is not ASIL-certified, its supporting documentation and robust parametric specs enable integration into safety-critical signal chains - such as BMS voltage monitoring - where fault detection and mitigation are implemented at the system level.
Can the REF3130AQDBZRQ1 sink and source current simultaneously?
No - the REF3130AQDBZRQ1 operates in either sourcing or sinking mode depending on external circuit demand, but cannot do both simultaneously at the same output node. It delivers up to +10 mA (source) when driving high-impedance loads like ADC reference inputs, or absorbs up to –10 mA (sink) when connected to pull-down resistors or active loads drawing current from the reference node. Its bidirectional capability means it adapts to net load polarity, but the instantaneous current direction is unidirectional per operating condition. This behavior is confirmed in the Electrical Characteristics table under ILOAD.
REF3130AQDBZRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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:
- ±0.2%
- Temperature Coefficient:
- 20ppm/°C
- Noise - 0.1Hz to 10Hz:
- 39µVp-p
- Noise - 10Hz to 10kHz:
- 57µVrms
- Voltage - Input:
- 3.05V ~ 5.5V
- Current - Supply:
- 135µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
REF3130AQDBZRQ1 FAQ
1.How can I place an order for REF3130AQDBZRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for REF3130AQDBZRQ1 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 REF3130AQDBZRQ1 reliable?
The price and inventory of REF3130AQDBZRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF3130AQDBZRQ1 is usually 5 days.
3.What payment methods are accepted for REF3130AQDBZRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF3130AQDBZRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF3130AQDBZRQ1?
REF3130AQDBZRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF3130AQDBZRQ1 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 REF3130AQDBZRQ1?
For technical support, including REF3130AQDBZRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF3130AQDBZRQ1 requirements.
6.How does Aetrix verify that REF3130AQDBZRQ1 is sourced from the original manufacturer or authorized distributors?
All REF3130AQDBZRQ1 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 REF3130AQDBZRQ1 meets industry standards.
7.What is the process for return or replacement of REF3130AQDBZRQ1?
All REF3130AQDBZRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with REF3130AQDBZRQ1, 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 REF3130AQDBZRQ1 part is unused and in its original packaging.
Return procedure for REF3130AQDBZRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF3130AQDBZRQ1 Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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LM4040EIM3-2.5/NOPB
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AZ431LBNTR-G1
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
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LM4040DIM3X-2.5/NOPB
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LM4040DIM3-2.5/NOPB
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AZ431LANTR-G1
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