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Texas Instruments REF35102QDBVR
- Part No.:
- REF35102QDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SOT-23-6
- Datasheet:
-
REF35102QDBVR.pdf
- Description:
- IC VREF SERIES 1.024V SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,092
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Product details
Overview
REF35102QDBVR from Texas Instruments is a nanopower, high-precision series voltage reference delivering 1.024V output with ±0.05% initial accuracy, 12ppm/°C max temperature coefficient (−40°C to 105°C), and 650nA typical quiescent current in a 6-pin SOT-23 package. It supports precision sensor biasing, low-power data converter reference, and portable medical instrumentation requiring ultra-low drift and long-term stability.
For engineers reviewing the REF35102QDBVR datasheet, REF35102QDBVR pinout, REF35102QDBVR application, or REF35102QDBVR equivalent, this page delivers verified specifications, validated pin functions, real-world use cases in flow transmitters and blood glucose monitors, and confirmed alternative options for design continuity.
Technical Context
The REF35102QDBVR implements a bandgap-based series reference architecture with integrated noise reduction (NR) and enable (EN) control, enabling active power management and sub-μA shutdown current (0.1μA typ). Its 12ppm/°C tempco and 40ppm long-term stability at 1k hour are achieved via curvature-corrected trimming across −40°C to 105°C operating range.
It features dual ground pins (GND1/GND2 internally shorted), rail-to-rail output sourcing (+10mA) and sinking (−5mA), and stable operation with 0.1μF input and 0.1–10μF output capacitors. The device maintains 3.3ppmP-P (0.1Hz–10Hz) noise and 20ppm/mA load regulation-critical for 16-bit ADC/DAC reference integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.024V ±0.05% - matches standard 10-bit DAC full-scale and enables precise 12-bit system calibration without gain scaling. |
| Quiescent Current | 650nA typical - enables multi-year battery life in wireless sensor nodes and implantable diagnostics. |
| Tempco (max) | 12ppm/°C (−40°C to 105°C) - ensures ≤±125ppm total drift over industrial temperature range, supporting <16-bit effective resolution. |
| Noise (0.1–10Hz) | 3.3ppmP-P - contributes <0.0003% error in high-resolution measurements, critical for optical module bias control. |
| Long-Term Stability | 40ppm at 1000 hours - guarantees minimal calibration drift in field-deployed process analytics equipment. |
| Operating Range | −55°C to +125°C - supports extended industrial and automotive under-hood applications beyond rated −40°C to +105°C. |
| Dropout Voltage | 120mV at 5mA - allows operation from 1.7V supply (VREF + VDO) in low-voltage systems like wearable biosensors. |
Pinout & Package
REF35102QDBVR is housed in a 6-pin SOT-23 (DBV) package measuring 2.90mm × 1.60mm, optimized for space-constrained PCB layouts in portable instrumentation and IoT edge nodes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground | Primary device ground; internally shorted to Pin 2 for low-impedance return path and reduced ground bounce. |
| GND (Pin 2) | Ground | Secondary ground terminal; shares internal connection with Pin 1 to improve thermal and electrical symmetry. |
| EN (Pin 3) | Enable Input | Active-high logic control; pulls device into shutdown mode (<0.5μA IQ) when driven below 0.3×VIN. |
| VIN (Pin 4) | Input Supply | Unregulated input (1.7V to 6V); must exceed VREF + VDO (120mV min) for regulation. |
| NR (Pin 5) | Noise Reduction | Connects to external capacitor (1μF typical) to reduce 0.1–10Hz output noise by up to 50%. |
| VREF (Pin 6) | Reference Output | Stable 1.024V source; capable of sourcing +10mA or sinking −5mA while maintaining <60ppm/mA load regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ (650nA) | Enables >10-year battery life in always-on environmental sensors and fault indicators with intermittent wake-up cycles. |
| ±0.05% Initial Accuracy | Eliminates factory calibration for most 12-bit systems, reducing BOM cost and test time in production flow transmitters. |
| NR Pin Noise Filtering | Reduces low-frequency noise by >30% with 1μF capacitor-essential for stable biasing of CSA/INA amplifiers in blood glucose monitors. |
| EN-Controlled Shutdown | Lowers current to 0.1μA typical, allowing dynamic power gating in oscilloscope front-end signal chains during idle periods. |
| Thermal Hysteresis (70ppm) | Minimizes measurement repeatability errors after thermal cycling in power quality analyzers deployed in variable ambient conditions. |
Applications
| Flow Transmitter | Blood Glucose Monitor |
|---|---|
Use Scenario: High-accuracy analog front-end for ultrasonic or Coriolis flow sensing in industrial pipelines. IC Role / Device Role / Timing Role: Precision 1.024V reference for 16-bit sigma-delta ADC converting differential pressure signals. Use Value: 12ppm/°C tempco and 40ppm long-term stability ensure <±0.1% flow rate accuracy over 10+ years of field operation. |
Use Scenario: Electrochemical sensor signal conditioning in handheld point-of-care diagnostic devices. IC Role / Device Role / Timing Role: Low-noise reference for transimpedance amplifier and ADC in glucose strip reader circuitry. Use Value: 3.3ppmP-P noise and NR pin support sub-millivolt resolution required for accurate glucose concentration calculation. |
| Servo Drive Control Module | Power Quality Analyzer |
Use Scenario: Closed-loop current/voltage feedback sensing in compact motor drives for robotics and CNC systems. IC Role / Device Role / Timing Role: Stable reference for isolated current-sense amplifier and protection comparator thresholds. Use Value: −55°C to +125°C operating range and 70ppm thermal hysteresis maintain accuracy across wide ambient and self-heating variations. |
Use Scenario: Multi-channel voltage/current measurement in utility-grade power monitoring equipment. IC Role / Device Role / Timing Role: Primary reference for simultaneous sampling ADCs capturing harmonics and transients up to 50kHz. Use Value: 20ppm/mA load regulation and 0.1μF–10μF stable capacitance range simplify layout for high-density, multi-channel designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF34102QPWR | Higher IQ (3.5μA typ), same 1.024V output and ±0.05% accuracy; 8ppm/°C tempco (−40°C to 125°C). | Better tempco but higher power; suited for mains-powered analyzers where noise and drift dominate over battery life. | Select REF34102QPWR when lower tempco outweighs 5.4× higher quiescent current in non-battery systems. |
| ADR3410ARJZ-R7 | 1.024V output, ±0.1% initial accuracy, 10ppm/°C tempco, 4.5μA IQ; 6-pin SOT-23 package. | Looser initial tolerance and higher IQ; acceptable for 12-bit systems with post-factory calibration. | Choose ADR3410ARJZ-R7 only if ±0.1% accuracy and 4.5μA IQ meet system requirements and TI supply continuity is constrained. |
Compared with REF35102QDBVR, REF34102QPWR offers superior temperature stability at higher power cost, while ADR3410ARJZ-R7 trades accuracy and efficiency for broader vendor availability-making REF35102QDBVR optimal for ultra-low-power, high-precision portable instrumentation.
Availability
REF35102QDBVR is available at Aetrix Electronics and suitable for flow transmitter calibration, blood glucose monitor sensor biasing, and servo drive feedback circuits requiring stable component supply across extended temperature ranges and multi-year product lifecycles.
Supply support for REF35102QDBVR 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 expertise in precision reference design and high-reliability manufacturing.
The REF35 family was engineered specifically for ultra-low-power, high-accuracy applications including portable medical devices, industrial process control, and battery-operated test equipment-where nanoscale current consumption and ppm-level stability are non-negotiable.
FAQ
What is the maximum operating temperature range for REF35102QDBVR?
The REF35102QDBVR is functional from −55°C to +125°C, with full electrical specifications guaranteed over −40°C to +105°C. This extended range supports deployment in harsh environments such as automotive under-hood modules and outdoor industrial sensors where thermal extremes are common. The device maintains 12ppm/°C tempco and 40ppm long-term stability within its specified operating window.
Does REF35102QDBVR require an external capacitor on the NR pin?
The NR pin of REF35102QDBVR is optional: it can be left floating for standard operation or connected to a 1μF capacitor to reduce 0.1–10Hz output noise by up to 50%. In blood glucose monitors and optical modules where low-frequency noise directly impacts measurement fidelity, adding the capacitor delivers measurable improvement in signal-to-noise ratio without altering any other circuit parameters.
Can REF35102QDBVR drive a 10kΩ load directly?
Yes-REF35102QDBVR can drive a 10kΩ load (102.4μA at 1.024V) with negligible error: its 20ppm/mA load regulation translates to just 2.07ppm error (0.0021mV) at that current. This capability eliminates need for buffer amplifiers in many 12–14-bit data acquisition systems, simplifying design and reducing board area in compact flow transmitter PCBs.
How does the EN pin affect REF35102QDBVR's power state?
The EN pin places REF35102QDBVR into ultra-low-power shutdown mode (<0.5μA IQ) when pulled below 0.3×VIN; it enables normal operation when ≥0.7×VIN or left floating. In oscilloscope channel boards, this allows synchronized reference activation only during active acquisition windows-reducing average system power by >99% during standby without compromising turn-on settling time (2ms to 0.1%).
Is REF35102QDBVR compatible with ceramic output capacitors?
Yes-REF35102QDBVR is stable with ceramic output capacitors ranging from 0.1μF to 10μF, provided ESR remains ≤400mΩ. This compatibility enables use of small, low-profile X7R/X5R MLCCs in space-constrained applications like wearable biosensors, avoiding bulkier tantalum or electrolytic alternatives while ensuring fast transient response and low noise performance.
REF35102QDBVR 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):
- 1.024V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 12ppm/°C
- Noise - 0.1Hz to 10Hz:
- 3.8ppmp-p
- Noise - 10Hz to 10kHz:
- 0.7ppmrms
- Voltage - Input:
- 1.274V ~ 6V
- Current - Supply:
- 2.6µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
REF35102QDBVR FAQ
1.How can I place an order for REF35102QDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for REF35102QDBVR 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 REF35102QDBVR reliable?
The price and inventory of REF35102QDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF35102QDBVR is usually 5 days.
3.What payment methods are accepted for REF35102QDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF35102QDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF35102QDBVR?
REF35102QDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF35102QDBVR 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 REF35102QDBVR?
For technical support, including REF35102QDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF35102QDBVR requirements.
6.How does Aetrix verify that REF35102QDBVR is sourced from the original manufacturer or authorized distributors?
All REF35102QDBVR 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 REF35102QDBVR meets industry standards.
7.What is the process for return or replacement of REF35102QDBVR?
All REF35102QDBVR units undergo pre-shipment inspection (PSI). If there is an issue with REF35102QDBVR, 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 REF35102QDBVR part is unused and in its original packaging.
Return procedure for REF35102QDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF35102QDBVR Tags
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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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