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Texas Instruments REF35180QDBVR
- Part No.:
- REF35180QDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SOT-23-6
- Datasheet:
-
REF35180QDBVR.pdf
- Description:
- IC VREF SERIES 1.8V SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,893
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Product details
Overview
REF35180QDBVR from Texas Instruments is a nanopower, high-precision series voltage reference delivering 1.8V 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 REF35180QDBVR datasheet, REF35180QDBVR pinout, REF35180QDBVR application, or REF35180QDBVR equivalent, key selection criteria include ultra-low IQ, low thermal drift over extended temperature range, noise reduction via NR pin, enable-controlled shutdown, and compatibility with 0.1µF input / up to 10µF output capacitors.
Technical Context
The REF35180QDBVR implements a bandgap-based series reference architecture with integrated noise-reduction (NR) and enable (EN) control terminals. Its 12ppm/°C tempco is specified across −40°C to 105°C for the SOT-23 (DBV) package, and it achieves 3.3ppmP-P low-frequency noise (0.1Hz–10Hz) at VREF < 2.5V.
It operates from VIN = VREF + VDO (min 1.7V for 1.8V output) up to 6V, delivers ±5mA sink/source capability, and features 20ppm/mA load regulation (source) and 40ppm/mA (sink), with 40ppm/V line regulation for VREF < 2.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | 1.8V nominal - precisely sets ADC/DAC reference level or sensor excitation voltage |
| Initial accuracy | ±0.05% max - enables single-point calibration in high-resolution systems |
| Tempco | 12ppm/°C max (−40°C to 105°C) - ensures <±120ppm total drift over full industrial range |
| Quiescent current | 650nA typical - supports >10-year battery life in always-on IoT sensors |
| Output noise | 3.3ppmP-P (0.1Hz–10Hz) - contributes <0.0005% error in 16-bit measurements |
| Load current | +10mA / −5mA - drives precision op-amps, SAR ADC references, and bridge sensors directly |
| Shutdown current | 0.1µA max - reduces system standby power in duty-cycled applications |
Pinout & Package
REF35180QDBVR is housed in a 6-pin SOT-23 (DBV) package measuring 2.90mm × 1.60mm, with pins 1 and 2 internally shorted as GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1 & 2) | Ground reference | Dual GND pins reduce ground impedance and improve PSRR; must be connected to low-impedance analog ground plane |
| EN (Pin 3) | Enable control input | Active-high logic input; floating or ≥0.7×VIN enables operation; ≤0.3×VIN places device in shutdown (IQ ≤ 0.5µA) |
| VIN (Pin 4) | Power input | Accepts 1.7V to 6V; dropout voltage is 120mV at 5mA, enabling use with low-headroom supplies |
| NR (Pin 5) | Noise reduction node | Connect external capacitor (1µF typical) to reduce 0.1Hz–10Hz noise; left floating if unused |
| VREF (Pin 6) | Reference output | Stable 1.8V source; requires 0.1–10µF output capacitor (ESR ≤ 400mΩ) for stability |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ mode | 650nA typical active current enables multi-year operation on coin-cell batteries in portable diagnostics |
| NR pin noise filtering | Reduces 0.1Hz–10Hz output noise to 3.3ppmP-P, critical for high-resolution DC measurements |
| EN pin shutdown control | Reduces supply current to 0.1µA max, allowing dynamic power gating in energy-constrained systems |
| Low thermal hysteresis | 70ppm max after −40°C ↔ 105°C cycling - maintains calibration integrity across thermal cycles |
| Long-term stability | 40ppm drift over first 1000 hours - predictable aging behavior simplifies lifetime accuracy modeling |
Applications
| Blood Glucose Monitor | Flow Transmitter |
|---|---|
Use Scenario: Portable handheld meter requiring stable excitation for electrochemical test strips and precision ADC reference. IC Role / Device Role / Timing Role: Provides 1.8V reference for 16-bit SAR ADC and bias voltage for amperometric sensor interface. Use Value: ±0.05% initial accuracy and 12ppm/°C tempco ensure glucose concentration readings remain within clinical tolerance across ambient temperature shifts. | Use Scenario: Industrial ultrasonic or Coriolis flow sensor with embedded signal conditioning and digital output. IC Role / Device Role / Timing Role: Supplies low-noise 1.8V reference to sigma-delta ADC and excitation voltage to differential pressure transducer bridge. Use Value: 3.3ppmP-P low-frequency noise minimizes flow rate quantization error; 650nA IQ extends maintenance-free operation in remote installations. |
| Servo Drive Control Module | Power Quality Analyzer |
Use Scenario: Compact motor drive with integrated current sensing, position feedback, and real-time protection logic. IC Role / Device Role / Timing Role: Delivers stable 1.8V reference for isolated current-sense amplifier and auxiliary ADC used in overcurrent detection. Use Value: Dual GND pins (Pins 1 & 2) lower ground path impedance, improving common-mode rejection in noisy PWM environments. | Use Scenario: Three-phase grid monitor measuring harmonics, THD, and RMS voltage/current with 14+ bit resolution. IC Role / Device Role / Timing Role: Powers reference input of high-speed 16-bit ADC sampling at 100kSPS while maintaining sub-LSB error. Use Value: 40ppm/V line regulation and 20ppm/mA load regulation prevent measurement drift during varying supply and load conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3418IRUNR | 1.8V, ±0.05% accuracy, 10ppm/°C (−40°C to 125°C), 550nA IQ, 5-pin X2SON package | Lower tempco and wider operating range; no EN/NR pins; smaller footprint | Preferred when board space is constrained and enable/shutdown not required |
| ADR3418ARJZ-R7 | 1.8V, ±0.1% accuracy, 20ppm/°C (−40°C to +125°C), 120µA IQ, 6-pin SOT-23 | Higher IQ and tempco; no EN/NR; higher drive strength (+15mA) | Selected where higher output current is needed and ultra-low power is secondary |
Compared with REF35180QDBVR, REF3418IRUNR offers tighter temperature stability but lacks enable and noise-reduction functionality, while ADR3418ARJZ-R7 provides greater output current at the cost of 180× higher quiescent power-making REF35180QDBVR optimal for battery-powered precision systems requiring dynamic power control and lowest possible noise.
Availability
REF35180QDBVR is available at Aetrix Electronics and suitable for blood glucose monitors, flow transmitters, servo drive control modules, and power quality analyzers requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for REF35180QDBVR 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 precision analog ICs and industrial-grade components.
The REF35 family was designed for ultra-low-power, high-accuracy voltage referencing in portable medical devices, industrial sensors, and battery-operated test equipment where nanoscale IQ and ppm-level stability are mandatory.
FAQ
What is the maximum operating temperature range for REF35180QDBVR?
The REF35180QDBVR 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 (DBV) package. Operation beyond 105°C may increase drift beyond spec but does not damage the device.
How does the NR pin on REF35180QDBVR reduce output noise?
The NR pin on REF35180QDBVR connects to an external capacitor that forms a low-pass filter for internal noise sources. With a 1µF capacitor, REF35180QDBVR achieves 3.3ppmP-P (0.1Hz–10Hz) noise at 1.8V output. Leaving NR floating yields same performance; adding capacitance beyond 10µF provides diminishing returns and risks instability.
Can REF35180QDBVR drive a 10kΩ load directly?
Yes. With a 1.8V output and ±5mA sink/source capability, REF35180QDBVR can drive a minimum 360Ω load (1.8V/5mA). A 10kΩ load draws only 180µA - well within its sourcing range - and introduces negligible error (<0.002% load regulation) due to its 20ppm/mA specification.
What is the recommended input capacitor for REF35180QDBVR?
The datasheet specifies a minimum 0.1µF ceramic input capacitor placed close to VIN and GND pins. This stabilizes the input supply against transient currents during load switching and improves PSRR above 10kHz. X7R or C0G dielectrics are preferred; capacitor ESR should be <1Ω for optimal performance.
Does REF35180QDBVR require output capacitance, and what value is supported?
Yes - REF35180QDBVR requires an output capacitor between VREF and GND for stability. The supported range is 0.1µF to 10µF, with ESR ≤ 400mΩ. A 1µF X7R ceramic capacitor is typical; values >1µF further reduce broadband noise but do not affect low-frequency (0.1Hz–10Hz) performance.
REF35180QDBVR 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):
- 1.8V
- 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:
- 2.05V ~ 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
REF35180QDBVR FAQ
1.How can I place an order for REF35180QDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for REF35180QDBVR 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 REF35180QDBVR reliable?
The price and inventory of REF35180QDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF35180QDBVR is usually 5 days.
3.What payment methods are accepted for REF35180QDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF35180QDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF35180QDBVR?
REF35180QDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF35180QDBVR 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 REF35180QDBVR?
For technical support, including REF35180QDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF35180QDBVR requirements.
6.How does Aetrix verify that REF35180QDBVR is sourced from the original manufacturer or authorized distributors?
All REF35180QDBVR 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 REF35180QDBVR meets industry standards.
7.What is the process for return or replacement of REF35180QDBVR?
All REF35180QDBVR units undergo pre-shipment inspection (PSI). If there is an issue with REF35180QDBVR, 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 REF35180QDBVR part is unused and in its original packaging.
Return procedure for REF35180QDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF35180QDBVR Tags
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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
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LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
Texas Instruments
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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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