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Texas Instruments REF35170QDBVR
- Part No.:
- REF35170QDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SOT-23-6
- Datasheet:
-
REF35170QDBVR.pdf
- Description:
- IC VREF SERIES 1.7V SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,802
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Product details
Overview
REF35170QDBVR from Texas Instruments is a nanopower, high-precision series voltage reference delivering 1.7V 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 serves as a stable excitation source for precision bridge sensors and low-power ADC biasing in battery-operated industrial measurement systems.
For engineers reviewing the REF35170QDBVR datasheet, REF35170QDBVR pinout, REF35170QDBVR application, or REF35170QDBVR equivalent, this page delivers verified electrical specifications, thermal performance data, noise characteristics, enable/shutdown behavior, and real-world stability metrics - all specific to the DBV-packaged 1.7V variant.
Technical Context
The REF35170QDBVR employs a bandgap-based series architecture with internal noise-reduction (NR) and enable (EN) terminals, supporting active operation down to 650nA and shutdown current as low as 0.1µA. Its 12ppm/°C tempco is specified over −40°C to +105°C, and long-term drift is characterized at 40ppm over 1k hours at 35°C.
It features 3.3ppmP-P (0.1Hz–10Hz) low-frequency noise, 20ppm/mA load regulation (source), and 40ppm/mA load regulation (sink), with dropout voltage of 120mV at 5mA. Input voltage range is VREF + VDO to 6V, and it supports output sourcing up to +10mA and sinking down to −5mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.7V nominal - matches common sensor excitation and 12–16-bit SAR ADC reference requirements without external scaling. |
| Initial Accuracy | ±0.05% max at 25°C - enables single-point calibration in portable instrumentation with <100ppm total error budget. |
| Tempco | 12ppm/°C max (−40°C to +105°C) - ensures ≤±120ppm drift across full industrial temperature range for stable gain/offset references. |
| Quiescent Current | 650nA typical active mode - allows >10-year battery life in always-on IoT sensor nodes drawing <1µA system standby current. |
| Low-Frequency Noise | 3.3ppmP-P (0.1Hz–10Hz) - contributes <0.0003% RMS error in high-resolution DC measurements with 16-bit+ converters. |
| Load Regulation | 20ppm/mA (source), 40ppm/mA (sink) - maintains reference integrity under dynamic sensor bias or DAC buffer loading conditions. |
| Shutdown Current | 0.1µA max at 25°C - enables power-gating during idle cycles without compromising wake-up latency or accuracy recovery. |
Pinout & Package
REF35170QDBVR is housed in a 6-pin SOT-23 (DBV) package measuring 2.90mm × 1.60mm, with pins 1 and 2 internally shorted to GND for enhanced thermal and grounding performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground | Primary device ground connection; internally shorted to Pin 2 for low-impedance return path and improved PSRR. |
| GND (Pin 2) | Ground | Secondary ground terminal - redundant connection reduces ground bounce in high-accuracy analog signal chains. |
| EN (Pin 3) | Enable Input | Active-high logic control: ≥0.7×VIN enables operation; ≤0.3×VIN places device in ultra-low-power shutdown mode. |
| VIN (Pin 4) | Power Input | Supply input requiring minimum VREF + VDO (120mV @ 5mA); accepts up to 6V for flexible system rail compatibility. |
| NR (Pin 5) | Noise Reduction | Connects to external capacitor (0.1–10µF) to suppress 1/f noise; left floating for standard performance. |
| VREF (Pin 6) | Reference Output | Stable 1.7V output capable of sourcing +10mA or sinking −5mA - suitable for driving ADC references and op-amp bias networks. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 650nA typical active current enables multi-year operation from coin-cell batteries in remote sensing nodes. |
| NR pin for noise reduction | External capacitor on NR pin reduces 0.1Hz–10Hz noise by up to 40%, critical for sub-16-bit precision DC measurements. |
| EN pin for shutdown control | 0.1µA shutdown current allows microcontroller-gated power cycling without sacrificing startup time or accuracy recovery. |
| High-precision tempco | 12ppm/°C max over −40°C to +105°C ensures <±0.12% total drift across industrial ambient range - no software compensation required. |
| Long-term stability | 40ppm drift over first 1000 hours at 35°C provides predictable aging behavior for calibration-interval planning in field-deployed equipment. |
Applications
| Flow Transmitter | Blood Glucose Monitor |
|---|---|
Use Scenario: Precision pressure differential measurement using Wheatstone bridge sensors in ultrasonic or Coriolis flow meters. IC Role / Device Role / Timing Role: Provides stable 1.7V excitation voltage for bridge biasing and reference for 16-bit sigma-delta ADC conversion. Use Value: Enables <0.1% full-scale accuracy over temperature and lifetime, meeting ISO 4185 and OIML R137 metrology requirements. | Use Scenario: Portable handheld blood glucose meters requiring single-use test strip calibration and low-power operation. IC Role / Device Role / Timing Role: Supplies accurate reference for electrochemical current-to-voltage conversion and ADC digitization of enzyme reaction signals. Use Value: Delivers ±0.05% initial accuracy and <3.3ppmP-P noise to resolve sub-1mg/dL glucose concentration changes with 14-bit effective resolution. |
| Servo Drive Control Module | Power Quality Analyzer |
Use Scenario: Analog feedback conditioning in industrial servo amplifiers monitoring motor phase currents via shunt resistors. IC Role / Device Role / Timing Role: References high-side current-sense amplifier offset nulling and ADC reference for closed-loop torque control. Use Value: Maintains 20ppm/mA load regulation under pulsed 10mA loads, preventing gain shift during PWM commutation transients. | Use Scenario: High-accuracy voltage and current channel digitization in Class A power quality analyzers per IEC 61000-4-30 Ed. 3. IC Role / Device Role / Timing Role: Supplies low-noise, low-drift reference for dual 16-bit simultaneous-sampling ADCs measuring harmonics up to 50th order. Use Value: 12ppm/°C tempco and 40ppm long-term drift ensure <0.02% measurement uncertainty over 2-year calibration intervals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF34170RTER | Higher quiescent current (3.5µA vs. 0.65µA), lower tempco (6ppm/°C), same 1.7V output, 6-pin WSON package. | Targeted at higher-accuracy, mains-powered systems where ultra-low power is secondary to tighter drift specs. | Select when tempco <6ppm/°C is mandatory and supply current >3µA is acceptable. |
| ADR3417ARJZ-R7 | 1.7V output, ±0.1% initial accuracy (vs. ±0.05%), 20ppm/°C tempco, 650nA IQ, SOT-23-6 package. | Lower-cost alternative for non-critical industrial sensors where 0.1% accuracy suffices and 20ppm/°C drift is tolerable. | Select when BOM cost sensitivity outweighs need for 0.05% accuracy and 12ppm/°C tempco. |
Compared with REF34170RTER and ADR3417ARJZ-R7, REF35170QDBVR uniquely balances ultra-low 650nA power, ±0.05% accuracy, and 12ppm/°C tempco in a standard SOT-23 - making it optimal for battery-powered precision measurement where both energy efficiency and metrological rigor are non-negotiable.
Availability
REF35170QDBVR is available at Aetrix Electronics and suitable for flow transmitter calibration, blood glucose meter design, and servo drive feedback conditioning requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for REF35170QDBVR 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 analog ICs and voltage references.
The REF35 family was engineered specifically for ultra-low-power, high-accuracy applications including portable medical devices, industrial process analytics, and battery-operated test equipment - prioritizing nanoscale current consumption without sacrificing metrological performance.
FAQ
What is the maximum operating temperature range for REF35170QDBVR?
The REF35170QDBVR 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, making it suitable for harsh industrial environments such as motor control enclosures and outdoor utility metering housings where ambient extremes occur.
Does REF35170QDBVR require an external capacitor on the NR pin?
No - the NR pin of REF35170QDBVR may be left floating for standard operation. Connecting a 0.1–10µF capacitor between NR and GND reduces 0.1Hz–10Hz output noise by up to 40%, which is beneficial in high-resolution DC measurement systems but not mandatory for basic reference functionality.
What is the minimum input voltage required for REF35170QDBVR to regulate properly?
The minimum input voltage for REF35170QDBVR is VREF + VDO, where VDO is 120mV at 5mA load and 250mV at 10mA load. For reliable operation at full output current, VIN must be ≥1.82V (1.7V + 120mV). At light loads (<1mA), VIN can be as low as 1.75V while maintaining regulation.
Can REF35170QDBVR sink current, and how much?
Yes - REF35170QDBVR can sink up to −5mA while maintaining output accuracy. This capability supports active pull-down configurations in ratiometric sensor interfaces and enables bidirectional reference buffering in precision op-amp circuits where the reference node may experience reverse current during transient events.
How does the long-term stability of REF35170QDBVR impact calibration intervals in field-deployed equipment?
REF35170QDBVR exhibits 40ppm drift over the first 1000 hours at 35°C, with diminishing drift thereafter. In field use at typical ambient temperatures (25–45°C), this translates to ~25–35ppm drift over two years - enabling calibration intervals of 24 months for Class 0.1 industrial instrumentation without exceeding total error budgets.
REF35170QDBVR 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):
- 1.7V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 12ppm/°C
- Noise - 0.1Hz to 10Hz:
- 3.3ppmp-p
- Noise - 10Hz to 10kHz:
- 0.7ppmrms
- Voltage - Input:
- 1.95V ~ 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
REF35170QDBVR FAQ
1.How can I place an order for REF35170QDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for REF35170QDBVR 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 REF35170QDBVR reliable?
The price and inventory of REF35170QDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF35170QDBVR is usually 5 days.
3.What payment methods are accepted for REF35170QDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF35170QDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF35170QDBVR?
REF35170QDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF35170QDBVR 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 REF35170QDBVR?
For technical support, including REF35170QDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF35170QDBVR requirements.
6.How does Aetrix verify that REF35170QDBVR is sourced from the original manufacturer or authorized distributors?
All REF35170QDBVR 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 REF35170QDBVR meets industry standards.
7.What is the process for return or replacement of REF35170QDBVR?
All REF35170QDBVR units undergo pre-shipment inspection (PSI). If there is an issue with REF35170QDBVR, 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 REF35170QDBVR part is unused and in its original packaging.
Return procedure for REF35170QDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF35170QDBVR Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
Microchip Technology
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LM4040CYM3-4.1-TR
Microchip Technology
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LM4040EIM3-2.5/NOPB
Texas Instruments
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
Texas Instruments
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LM4041DIM3-ADJ/NOPB
Texas Instruments
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LM4040DIM3X-2.5/NOPB
Texas Instruments
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LM4040DIM3-2.5/NOPB
Texas Instruments
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AZ431LANTR-G1
Diodes Incorporated
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