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Texas Instruments REF35330QDBVR
- Part No.:
- REF35330QDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SOT-23-6
- Datasheet:
-
REF35330QDBVR.pdf
- Description:
- IC VREF SERIES SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,564
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Product details
Overview
REF35330QDBVR from Texas Instruments is a nanopower, high-precision series voltage reference delivering 3.3V 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 data acquisition in portable medical sensors and industrial process analyzers.
For engineers reviewing the REF35330QDBVR datasheet, REF35330QDBVR pinout, REF35330QDBVR application, or REF35330QDBVR equivalent, key selection criteria include ultra-low IQ, low thermal hysteresis (70ppm), NR pin noise reduction capability, EN pin shutdown control, and compatibility with 10µF output capacitance for stability.
Technical Context
The REF35330QDBVR implements a bandgap-based series reference architecture with integrated noise-reduction (NR) and enable (EN) terminals. Its 12ppm/°C drift specification applies across −40°C to +105°C in the SOT-23 package, and it achieves 3.3ppmP-P (0.1Hz–10Hz) low-frequency noise when used with recommended external capacitors.
It operates from VIN = VREF + VDO up to 6V, supports ±5mA sink/source load current, and features 20ppm/mA load regulation (source) and 40ppm/mA (sink), enabling stable biasing of precision ADCs, DACs, and sensor signal chains without external buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | 3.3V nominal; enables direct interface with 3.3V logic and analog subsystems without level shifting. |
| Initial accuracy | ±0.05% max at 25°C; reduces calibration burden in high-resolution (16-bit+) data converters. |
| Tempco | 12ppm/°C max (−40°C to 105°C); ensures <±120ppm total drift over full industrial range. |
| Quiescent current | 650nA typical; allows multi-year battery life in always-on portable instrumentation. |
| Low-frequency noise | 3.3ppmP-P (0.1Hz–10Hz); preserves SNR in high-gain, low-bandwidth sensor front-ends. |
| Long-term stability | 40ppm at 1k hour; predicts minimal drift during field deployment in critical measurement systems. |
| Shutdown current | 0.1µA max at 25°C; enables power gating in duty-cycled sensing nodes. |
Pinout & Package
REF35330QDBVR is housed in a 6-pin SOT-23 (DBV) package measuring 2.90mm × 1.60mm, 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; dual GND improves PSRR and noise immunity. |
| EN (Pin 3) | Enable control input | Active-high logic input; drives device into sub-0.5µA shutdown mode when pulled low. |
| VIN (Pin 4) | Input supply | Accepts 3.42V–6V (VREF + VDO to 6V); dropout voltage is 120mV at 5mA load. |
| NR (Pin 5) | Noise reduction node | Connect external capacitor (e.g., 1µF) to reduce 0.1Hz–10Hz noise; floating if unused. |
| VREF (Pin 6) | Precision output | Delivers regulated 3.3V; capable of sourcing 10mA or sinking 5mA with ≤60ppm/mA load regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Nanopower operation | 650nA typical IQ enables >10-year battery life in continuous-monitoring devices like glucose meters. |
| Integrated NR pin | External capacitor on NR pin reduces 0.1Hz–10Hz noise by up to 50%, critical for thermocouple and bridge sensor interfaces. |
| EN-controlled shutdown | Reduces current to 0.1µA, allowing microcontroller-driven power cycling in IoT edge nodes. |
| High-accuracy tempco | 12ppm/°C max over −40°C to 105°C ensures <±120ppm total error in unheated industrial enclosures. |
| Robust long-term stability | 40ppm drift at 1000 hours supports 15+ year field reliability in power quality analyzers and fault indicators. |
Applications
| Flow transmitter | Blood glucose monitor |
|---|---|
Use Scenario: High-accuracy analog front-end for differential pressure sensing in smart water/gas meters. IC Role / Device Role / Timing Role: Provides stable 3.3V reference for 24-bit sigma-delta ADC measuring microvolt-level bridge outputs. Use Value: ±0.05% initial accuracy and 12ppm/°C tempco ensure <0.1% total measurement error across temperature and lifetime. | Use Scenario: Portable handheld diagnostic device requiring single-cell coin-cell operation. IC Role / Device Role / Timing Role: Supplies precision bias to electrochemical sensor amplifier and 16-bit SAR ADC. Use Value: 650nA quiescent current extends battery life beyond 2 years; NR pin minimizes low-frequency noise corrupting small current signals. |
| Servo drive control module | Power quality analyzer |
Use Scenario: Closed-loop position feedback circuit in industrial servo amplifiers with isolated current sensing. IC Role / Device Role / Timing Role: References isolated shunt amplifier and ADC for motor phase current measurement. Use Value: Thermal hysteresis of 70ppm prevents calibration drift after repeated thermal cycling during motor startup/shutdown. | Use Scenario: Three-phase grid monitoring system capturing harmonics and transients with 16-bit resolution. IC Role / Device Role / Timing Role: Stable 3.3V reference for simultaneous sampling ADCs across all voltage/current channels. Use Value: 3.3ppmP-P low-frequency noise maintains >95dB SNR; long-term stability ensures calibration validity over 5+ years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3433QDBVR | Higher IQ (3.5µA typ), same 3.3V output and ±0.05% accuracy, but no NR pin. | Lacks noise-reduction capability; unsuitable for ultra-low-noise sensor biasing. | Select REF3433QDBVR only when lower cost and absence of NR functionality are acceptable. |
| ADR3433ARJZ-R7 | 1.8µA IQ, 10ppm/°C tempco (−40°C to +125°C), 3.3V output, no EN/NR pins. | Wider operating temperature range but no shutdown or noise filtering; requires external enable circuitry. | Choose ADR3433ARJZ-R7 for extended-temp environments where EN/NR features are unnecessary. |
Compared with REF35330QDBVR, REF3433QDBVR trades nanopower operation for cost savings and lacks NR functionality, while ADR3433ARJZ-R7 offers better tempco over wider temperature range but omits both EN and NR control-making REF35330QDBVR uniquely suited for battery-powered, low-noise, and power-gated precision systems.
Availability
REF35330QDBVR is available at Aetrix Electronics and suitable for flow transmitters, blood glucose monitors, servo drive control modules, and power quality analyzers requiring stable component supply with guaranteed long-term availability.
Supply support for REF35330QDBVR 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.
The REF35 family was engineered for ultra-low-power, high-accuracy applications including portable medical devices, industrial process analytics, and battery-operated test equipment demanding sub-1µA operation and ppm-level stability.
FAQ
What is the maximum operating temperature range for the REF35330QDBVR?
The REF35330QDBVR is fully specified from −40°C to +105°C and remains functional across −55°C to +125°C. Its 12ppm/°C temperature coefficient is guaranteed only within the −40°C to +105°C range for the SOT-23 package. Operation outside this range may affect accuracy but does not damage the device.
How does the NR pin on the REF35330QDBVR reduce noise?
The NR pin on the REF35330QDBVR accepts an external capacitor (typically 1µF) that forms a low-pass filter with internal impedance, reducing 0.1Hz–10Hz output noise from 3.3ppmP-P to as low as 1.8ppmP-P. This feature is essential for high-resolution sensor interfaces where 1/f noise dominates measurement uncertainty.
Can the REF35330QDBVR drive a 10µF output capacitor?
Yes, the REF35330QDBVR is explicitly characterized and stable with output capacitance up to 10µF (ESR ≤ 400mΩ). Using 10µF improves PSRR and transient response in ADC reference applications, and the device's internal compensation ensures no oscillation or settling degradation.
What is the dropout voltage of the REF35330QDBVR at full load?
The REF35330QDBVR has a dropout voltage of 120mV at 5mA load and 250mV at 10mA load. Therefore, minimum input voltage is 3.42V (3.3V + 120mV) for 5mA operation, making it compatible with standard 3.6V Li-ion cells and 3.3V LDO outputs with margin.
Is the REF35330QDBVR pin-compatible with other REF35 variants?
Yes, all REF35 devices in the DBV (SOT-23-6) package-including REF35330QDBVR, REF35250QDBVR, and REF35125QDBVR-share identical pinout, footprint, and thermal characteristics. Voltage variants differ only in internal trimming; no PCB redesign is needed when switching between 1.25V, 2.5V, or 3.3V versions.
REF35330QDBVR 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):
- 3.3V
- 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:
- 3.55V ~ 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
REF35330QDBVR FAQ
1.How can I place an order for REF35330QDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for REF35330QDBVR 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 REF35330QDBVR reliable?
The price and inventory of REF35330QDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF35330QDBVR is usually 5 days.
3.What payment methods are accepted for REF35330QDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF35330QDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF35330QDBVR?
REF35330QDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF35330QDBVR 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 REF35330QDBVR?
For technical support, including REF35330QDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF35330QDBVR requirements.
6.How does Aetrix verify that REF35330QDBVR is sourced from the original manufacturer or authorized distributors?
All REF35330QDBVR 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 REF35330QDBVR meets industry standards.
7.What is the process for return or replacement of REF35330QDBVR?
All REF35330QDBVR units undergo pre-shipment inspection (PSI). If there is an issue with REF35330QDBVR, 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 REF35330QDBVR part is unused and in its original packaging.
Return procedure for REF35330QDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF35330QDBVR Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
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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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