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Texas Instruments REF35120YBHR
- Part No.:
- REF35120YBHR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 4-XFBGA, DSBGA
- Datasheet:
-
REF35120YBHR.pdf
- Description:
- 650-NA QUIESCENT CURRENT, 12-PPM
- Quantity:
- Payment:
- Shipping:
Inventory:4,230
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Product details
Overview
REF35120YBHR from Texas Instruments is a nanopower, high-precision series voltage reference delivering 1.2V output with ±0.05% initial accuracy, 10ppm/°C max temperature coefficient (−40°C to +85°C), and 650nA typical quiescent current in a 4-pin WCSP package. It serves as a stable excitation source for precision sensors and biasing reference for 12–16-bit ADCs/DACs in ultra-low-power portable instrumentation.
For engineers reviewing the REF35120YBHR datasheet, REF35120YBHR pinout, REF35120YBHR application, or REF35120YBHR equivalent, this page provides verified electrical specifications, thermal performance data, noise characteristics, and real-world implementation guidance for battery-powered medical, industrial, and test equipment designs.
Technical Context
The REF35120YBHR employs a proprietary bandgap core with curvature compensation to achieve low-drift operation across −40°C to +85°C (10ppm/°C max) and functional operation from −55°C to +125°C. Its EN pin enables active shutdown (0.1µA typ), while the NR pin supports external capacitor filtering to reduce 0.1Hz–10Hz noise to 3.3ppmP-P.
Designed for high-accuracy analog signal chains, it delivers ±20ppm/mA load regulation (source), 40ppm/V line regulation, and maintains stability with 0.1µF–10µF output capacitance (ESR ≤400mΩ). Dropout voltage is 120mV at 5mA load, enabling use with low-headroom supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | 1.2V nominal - precise excitation for bridge sensors and thermocouple amplifiers requiring stable low-voltage bias. |
| Initial accuracy | ±0.05% max at 25°C - eliminates need for system-level calibration in portable blood glucose monitors and fault indicators. |
| Tempco | 10ppm/°C max (−40°C to +85°C) - ensures <±85ppm total drift over industrial ambient range, critical for power quality analyzers. |
| Quiescent current | 0.65µA typical - enables multi-year battery life in wireless flow transmitters and optical modules. |
| Output noise | 3.3ppmP-P (0.1Hz–10Hz) - supports 16-bit effective resolution in precision data acquisition without additional filtering. |
| Load drive | +10mA / −5mA - sufficient to directly bias CSA/INA amplifiers and drive ADC reference inputs without buffer. |
| Shutdown current | 0.1µA typical - reduces standby power in duty-cycled oscilloscope front-ends and process analytics systems. |
Pinout & Package
REF35120YBHR uses a 4-pin Wafer Chip Scale Package (WCSP), measuring 1.05mm × 0.84mm, with solder bumps on bottom side. The package is optimized for minimal PCB area and thermal resistance (RθJB = 60.3°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (B1) | Ground reference | Primary device ground connection; internal die substrate tie point for low-noise return path. |
| EN (B2) | Enable control input | Active-high logic input; floating or pulled high enables reference; driven low reduces IQ to 0.1µA. |
| VIN (A2) | Power supply input | Accepts 1.7V to 6V input; dropout voltage is 120mV at 5mA, enabling use with 1.8V rails. |
| VREF (A1) | Reference output | Stable 1.2V output; requires 0.1–10µF ceramic capacitor (ESR ≤400mΩ) for stability and noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 650nA typical active current enables >10-year battery life in always-on sensor nodes. |
| Noise reduction pin | NR pin omitted in YBH package - noise performance achieved via internal optimization and external VREF capacitor. |
| Thermal hysteresis | 70ppm max after −40°C/+85°C cycling - ensures repeatable accuracy in field-deployed servo drive modules. |
| Long-term stability | 40ppm drift at 1k hours - supports 15+ year reliability targets in medical diagnostic equipment without recalibration. |
| Wide operating range | Functional from −55°C to +125°C - qualified for under-hood automotive and industrial control environments. |
Applications
| Flow Transmitter | Blood Glucose Monitor |
|---|---|
Use Scenario: Precision current loop transmitter for industrial fluid metering with 4–20mA output. IC Role / Device Role / Timing Role: 1.2V reference for DAC-controlled current source and sensor bridge excitation. Use Value: ±0.05% accuracy and 10ppm/°C tempco ensure <0.1% full-scale error across temperature, meeting ANSI/ISA-71.04 G2 corrosion severity requirements. | Use Scenario: Handheld electrochemical biosensor with disposable test strip interface. IC Role / Device Role / Timing Role: Stable excitation voltage for amperometric glucose sensing electrode and ADC reference. Use Value: 650nA IQ extends single-CR2032 battery life beyond 2,000 tests; low 0.1–10Hz noise prevents false positives in sub-1mg/dL glucose detection. |
| Servo Drive Control Module | Power Quality Analyzer |
Use Scenario: Compact motor control board with integrated current/voltage sensing and PWM generation. IC Role / Device Role / Timing Role: Reference for isolated sigma-delta current shunt ADC and analog front-end gain calibration. Use Value: 70ppm thermal hysteresis ensures consistent torque command accuracy after repeated thermal cycling during motor startup/shutdown cycles. | Use Scenario: Portable three-phase power analyzer measuring harmonics, THD, and flicker per IEC 61000-4-30 Class A. IC Role / Device Role / Timing Role: Low-noise reference for 16-bit simultaneous-sampling ADCs capturing voltage/current waveforms. Use Value: 3.3ppmP-P 0.1–10Hz noise enables >92dB SNR, supporting accurate 50th harmonic analysis (2.5kHz) without digital post-filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF34120RQDBVR | Higher IQ (3.5µA typ), same 1.2V output and ±0.05% accuracy; SOT-23-6 package; includes NR pin. | Better noise filtering capability (NR pin supports 1µF capacitor), but larger footprint and higher power draw. | Select when lower 0.1–10Hz noise (<2.5ppmP-P) is required and PCB area permits SOT-23. |
| ADR3412ARTZ-R7 | 1.2V output, ±0.1% initial accuracy, 20ppm/°C tempco, 12µA IQ; SOT-23-5 package; no EN pin. | Lacks enable function and has looser accuracy/tempco; suitable only for non-battery, fixed-supply applications. | Choose only if cost sensitivity outweighs precision and power requirements, and shutdown functionality is unnecessary. |
Compared with REF35120YBHR, REF34120RQDBVR offers superior noise control but consumes 5× more current and occupies 3.5× more PCB area; ADR3412ARTZ-R7 trades 2× lower accuracy and no enable for lower unit cost in non-portable systems.
Availability
REF35120YBHR is available at Aetrix Electronics and suitable for flow transmitter calibration, blood glucose monitor production, and power quality analyzer design requiring stable component supply with guaranteed long-term availability.
Supply support for REF35120YBHR 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 low-power signal chain solutions.
The REF35 family was engineered specifically for ultra-low-power, high-accuracy applications including portable medical devices, industrial IoT sensors, and battery-operated test equipment where nanoscale current consumption and ppm-level stability are mandatory.
FAQ
What is the maximum operating temperature range for REF35120YBHR?
The REF35120YBHR is fully specified from −40°C to +85°C with 10ppm/°C max temperature coefficient, and remains functional across −55°C to +125°C. This extended range supports deployment in harsh environments such as under-hood automotive modules and outdoor industrial controllers where ambient temperatures exceed standard industrial limits.
Does REF35120YBHR include a noise reduction (NR) pin?
No, the REF35120YBHR in the YBH (4-pin WCSP) package does not include an NR pin. Noise performance is optimized internally and through recommended external 0.1–10µF ceramic capacitors on the VREF pin. The NR pin is present only in the 6-pin SOT-23 variants (e.g., REF35120QDBVR).
What is the minimum input voltage required for REF35120YBHR to regulate at 1.2V?
The minimum input voltage for REF35120YBHR is 1.7V, as specified for VREF = 1.024V to 1.5V outputs. This 500mV headroom accommodates the 120mV dropout voltage at 5mA load and ensures stable regulation even with input ripple or trace resistance.
How does the enable (EN) pin function on REF35120YBHR?
The EN pin on REF35120YBHR is an active-high digital input. When pulled high (≥0.7×VIN) or left floating, the device operates normally with 0.65µA typical quiescent current. When driven low (≤0.3×VIN), it enters shutdown mode drawing only 0.1µA, making it ideal for duty-cycled sensor readouts in wearable health monitors.
Is REF35120YBHR suitable for driving ADC reference inputs directly?
Yes, REF35120YBHR can directly drive most SAR and delta-sigma ADC reference inputs. It delivers ±10mA output current and exhibits 20ppm/mA load regulation, ensuring <±20ppm reference voltage shift across full ADC input current range - well within the 16-bit (15.3ppm LSB) requirement for 1.2V full-scale.
REF35120YBHR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 4-XFBGA, DSBGA
- Series:
- REF35
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 10ppm/°C
- Noise - 0.1Hz to 10Hz:
- 3.3ppmp-p
- Noise - 10Hz to 10kHz:
- 0.7ppmrms
- Voltage - Input:
- 1.45V ~ 6V
- Current - Supply:
- 2.6µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-DSBGA
REF35120YBHR FAQ
1.How can I place an order for REF35120YBHR through Aetrix?
Please submit a Request for Quotation (RFQ) for REF35120YBHR 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 REF35120YBHR reliable?
The price and inventory of REF35120YBHR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF35120YBHR is usually 5 days.
3.What payment methods are accepted for REF35120YBHR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF35120YBHR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF35120YBHR?
REF35120YBHR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF35120YBHR 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 REF35120YBHR?
For technical support, including REF35120YBHR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF35120YBHR requirements.
6.How does Aetrix verify that REF35120YBHR is sourced from the original manufacturer or authorized distributors?
All REF35120YBHR 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 REF35120YBHR meets industry standards.
7.What is the process for return or replacement of REF35120YBHR?
All REF35120YBHR units undergo pre-shipment inspection (PSI). If there is an issue with REF35120YBHR, 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 REF35120YBHR part is unused and in its original packaging.
Return procedure for REF35120YBHR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF35120YBHR 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
-
AZ431LANTR-G1
Diodes Incorporated
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