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Texas Instruments REF35300QDBVR
- Part No.:
- REF35300QDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SOT-23-6
- Datasheet:
-
REF35300QDBVR.pdf
- Description:
- IC VREF SERIES SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,246
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Product details
Overview
REF35300QDBVR from Texas Instruments is a nanopower, high-precision series voltage reference delivering 3.0V 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 and 12–16-bit data converter power supply in portable industrial instrumentation.
For engineers reviewing the REF35300QDBVR datasheet, REF35300QDBVR pinout, REF35300QDBVR application, or REF35300QDBVR equivalent, key selection criteria include ultra-low IQ for battery life, 3.3ppmP-P 0.1Hz–10Hz noise, EN/NR pin control for dynamic power management, and −55°C to +125°C operational range for harsh environments.
Technical Context
The REF35300QDBVR implements a bandgap-based series reference architecture with integrated noise-reduction (NR) and enable (EN) terminals. Its 12ppm/°C tempco over −40°C to 105°C and 40ppm long-term stability at 1k hour are specified for the DBV (SOT-23) package variant. The device achieves 3.3ppmP-P low-frequency noise via external NR capacitor filtering and maintains 20ppm/mA load regulation when sourcing up to +10mA.
It operates from VIN = VREF + VDO (120mV @ 5mA) to 6V, supports shutdown current as low as 0.1µA, and features thermal hysteresis of 70ppm after −40°C/105°C cycling - critical for repeatable calibration in field-deployed equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | 3.0V nominal; enables direct interface with 3V ADC references and low-voltage microcontroller analog peripherals. |
| Initial accuracy | ±0.05% max at 25°C; reduces system calibration burden and improves absolute measurement fidelity. |
| Tempco | 12ppm/°C max (−40°C to 105°C); ensures <±120ppm total drift across full industrial range for stable sensor scaling. |
| Quiescent current | 650nA typical active, 0.1µA shutdown; extends battery life to years in wireless sensor nodes and portable medical devices. |
| Low-frequency noise | 3.3ppmP-P (0.1Hz–10Hz, VREF < 2.5V); meets noise floor requirements for 16-bit SAR ADCs without additional filtering. |
| Load regulation | 20ppm/mA sourcing (0–10mA); maintains reference integrity under dynamic sensor excitation or DAC buffer loading. |
| Dropout voltage | 120mV at 5mA; allows operation from 3.12V supply, compatible with single-cell LiFePO4 or regulated 3.3V rails. |
Pinout & Package
REF35300QDBVR uses the 6-pin SOT-23 (DBV) package (2.90mm × 1.60mm body), optimized for space-constrained PCB layouts while maintaining thermal performance (RθJA = 164.4°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1 & 2) | Ground reference | Internally shorted pins provide low-impedance return path; decoupling capacitors must connect here to minimize noise coupling. |
| EN (Pin 3) | Enable control input | Logic-high or floating enables output; logic-low disables reference and reduces IQ to 0.1µA - essential for duty-cycled systems. |
| VIN (Pin 4) | Input supply | Accepts 3.12V–6V; requires 0.1µF ceramic input capacitor close to pin for PSRR optimization above 10kHz. |
| NR (Pin 5) | Noise reduction node | Connects external capacitor (0.1–10µF) to reduce 0.1Hz–10Hz noise; left floating if not used. |
| VREF (Pin 6) | Precision output | Delivers regulated 3.0V; output capacitor (0.1–10µF, ESR ≤400mΩ) required for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ (650nA) | Enables multi-year operation from coin cells in IoT edge sensors and portable diagnostics equipment. |
| NR pin with external capacitor | Reduces 0.1Hz–10Hz noise to 3.3ppmP-P, eliminating need for post-regulator RC filters in high-resolution data acquisition. |
| EN pin with sub-µA shutdown | Permits precise power gating in battery-powered instruments, reducing average system current by >99% during idle periods. |
| 12ppm/°C tempco (−40°C to 105°C) | Guarantees reference stability across automotive under-hood and industrial process control ambient ranges without software compensation. |
| 40ppm long-term stability (1k hr) | Minimizes recalibration frequency in field-deployed flow transmitters and power quality analyzers, lowering TCO. |
Applications
| Flow transmitter | Blood glucose monitor |
|---|---|
Use Scenario: High-accuracy differential pressure sensing in smart water/gas meters with 16-bit sigma-delta ADCs. IC Role / Device Role / Timing Role: Provides stable 3.0V reference for bridge excitation and ADC conversion, directly determining mass flow calculation accuracy. Use Value: ±0.05% initial accuracy and 12ppm/°C tempco ensure <±0.1% full-scale error over temperature, meeting ANSI/API metrology standards. | Use Scenario: Portable handheld blood glucose meters using electrochemical test strips requiring precise bias voltage. IC Role / Device Role / Timing Role: Supplies regulated 3.0V to amperometric sensor front-end and 12-bit SAR ADC for strip current measurement. Use Value: 650nA IQ extends single-CR2032 battery life beyond 500 tests; 3.3ppmP-P noise prevents false high/low glucose readings. |
| Servo drive control module | Power quality analyzer |
Use Scenario: Current sensing and position feedback conditioning in compact industrial servo drives with isolated gate drivers. IC Role / Device Role / Timing Role: References shunt amplifier gain stages and ADC inputs for motor phase current measurement. Use Value: −55°C to +125°C operating range survives drive enclosure thermal cycling; EN pin enables synchronized reference activation with PWM periods. | Use Scenario: Multi-channel voltage/current harmonic analysis in DIN-rail mounted PQ analyzers with simultaneous sampling. IC Role / Device Role / Timing Role: Supplies common 3.0V reference to 16-bit ADCs on all channels to eliminate inter-channel gain mismatch. Use Value: 70ppm thermal hysteresis ensures repeatable calibration after field temperature excursions; 40ppm 1k-hour drift reduces annual recalibration needs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3430QDBVR | Higher IQ (3.5µA), same 3.0V output and ±0.05% accuracy; no NR pin; 10ppm/°C tempco (−40°C to 125°C). | Better tempco over extended range but lacks noise filtering capability; suited for non-noise-critical industrial controls. | Select REF3430QDBVR only if lower tempco outweighs need for sub-ppm noise suppression in high-resolution measurement. |
| ADR3430ARJZ-R7 | 3.0V output, ±0.1% accuracy, 12ppm/°C tempco, 4.5µA IQ; no EN/NR pins; 5-pin SOT-23 package. | Higher initial error and fixed operation; requires external enable circuitry; less suitable for ultra-low-power or dynamically filtered designs. | Choose ADR3430ARJZ-R7 only when TI supply chain constraints exist and system can tolerate doubled initial error and no power gating. |
Compared with REF35300QDBVR, REF3430QDBVR trades nanopower operation for improved temperature coefficient across −40°C to 125°C, while ADR3430ARJZ-R7 offers broader distributor availability but sacrifices accuracy, IQ, and feature set - making REF35300QDBVR optimal for battery-powered precision instrumentation where noise, power, and stability are co-constrained.
Availability
REF35300QDBVR is available at Aetrix Electronics and suitable for flow transmitter calibration, portable medical diagnostics, and industrial servo drive design requiring stable component supply with guaranteed long-term manufacturability.
Supply support for REF35300QDBVR 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 voltage references and signal-chain solutions.
The REF35 family was designed specifically for ultra-low-power, high-stability applications in portable instrumentation, medical devices, and industrial sensors - prioritizing nanoscale IQ, low noise, and robust thermal performance over legacy reference trade-offs.
FAQ
What is the maximum operating temperature range for REF35300QDBVR?
The REF35300QDBVR is fully specified from −40°C to +105°C and remains functional across −55°C to +125°C. This extended range supports deployment in automotive engine compartments, outdoor utility meters, and industrial control cabinets where ambient temperatures exceed standard commercial limits. The 12ppm/°C tempco guarantee applies strictly within the −40°C to +105°C range per datasheet Section 6.5.
How does the NR pin on REF35300QDBVR reduce output noise?
The NR pin on REF35300QDBVR connects to an external capacitor (0.1–10µF) that forms a low-pass filter with internal impedance, suppressing 0.1Hz–10Hz noise to 3.3ppmP-P. When the NR capacitor is omitted, noise increases to 3.8ppmP-P for VREF ≥2.5V. This feature eliminates the need for discrete RC filters in high-resolution data acquisition systems using the REF35300QDBVR.
Can REF35300QDBVR be used with a 3.3V supply rail?
Yes - REF35300QDBVR operates with input voltage from VREF + VDO (3.12V minimum at 5mA) up to 6V, making it fully compatible with standard 3.3V LDO outputs. Its 120mV dropout voltage ensures stable 3.0V regulation even as the 3.3V rail sags to 3.15V under load, provided a 0.1µF input capacitor is placed adjacent to the VIN pin.
What is the long-term stability specification for REF35300QDBVR?
REF35300QDBVR exhibits 40ppm typical long-term stability over 1000 hours at 35°C, measured per JEDEC JESD22-A117. This value reflects real-world PCB mounting conditions without burn-in, and represents the dominant drift period - subsequent drift is typically lower. Stability is verified using calibrated 8.5-digit multimeters in oil-bath temperature control to isolate aging effects from thermal artifacts.
Does REF35300QDBVR require an output capacitor, and what value is recommended?
Yes - REF35300QDBVR requires an output capacitor between VREF and GND for stability and transient response. The datasheet specifies a range of 0.1µF to 10µF with ESR ≤400mΩ. A 1µF X7R ceramic capacitor placed within 2mm of the VREF pin delivers optimal load transient performance (Figure 6-22) and ensures phase margin >60° across temperature and load conditions.
REF35300QDBVR 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:
- 12ppm/°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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
REF35300QDBVR FAQ
1.How can I place an order for REF35300QDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for REF35300QDBVR 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 REF35300QDBVR reliable?
The price and inventory of REF35300QDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF35300QDBVR is usually 5 days.
3.What payment methods are accepted for REF35300QDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF35300QDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF35300QDBVR?
REF35300QDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF35300QDBVR 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 REF35300QDBVR?
For technical support, including REF35300QDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF35300QDBVR requirements.
6.How does Aetrix verify that REF35300QDBVR is sourced from the original manufacturer or authorized distributors?
All REF35300QDBVR 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 REF35300QDBVR meets industry standards.
7.What is the process for return or replacement of REF35300QDBVR?
All REF35300QDBVR units undergo pre-shipment inspection (PSI). If there is an issue with REF35300QDBVR, 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 REF35300QDBVR part is unused and in its original packaging.
Return procedure for REF35300QDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF35300QDBVR 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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