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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Reference

Texas Instruments REF35250YBHR

Name: REF35250YBHR
Brand: Texas Instruments
SKU: REF35250YBHR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: REF35250YBHR

Manufacturer:: Texas Instruments

Category:: Voltage Reference

Package:: 4-XFBGA, DSBGA

Datasheet:: REF35250YBHR.pdf

Description:: 650-nA quiescent current, 12-pp

Quantity:: RFQ Add To RFQ list

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Product details

Overview

REF35250YBHR from Texas Instruments is a nanopower, high-precision series voltage reference delivering 2.5V 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 supports precision data converters and low-power sensor biasing in portable medical and industrial instrumentation.

For engineers reviewing the REF35250YBHR datasheet, REF35250YBHR pinout, REF35250YBHR application, or REF35250YBHR equivalent, key selection criteria include ultra-low IQ, tight initial tolerance, low thermal drift over extended temperature range, noise reduction via NR pin, and enable-controlled shutdown for battery-sensitive systems.

Technical Context

The REF35250YBHR implements a bandgap-based series reference architecture with internal curvature compensation to achieve 10ppm/°C max drift across −40°C to +85°C. Its EN pin enables full shutdown with 0.1µA max IQ, while the NR pin accepts external capacitance to suppress 0.1Hz–10Hz noise down to 3.3ppm_P-P.

Designed for operation from V_REF + V_DO (120mV at 5mA) up to 6V input, it sources ±10mA output current with 20ppm/mA load regulation (source) and 40ppm/mA (sink), supporting direct ADC/DAC reference and sensor excitation without external buffering.

Key Specifications

Parameter	Value and Actual Design Meaning
Output voltage	2.5V nominal; stable reference for 12–16-bit SAR and delta-sigma ADCs requiring ≤0.5LSB error at 16-bit resolution.
Initial accuracy	±0.05% max at 25°C; eliminates need for system-level calibration in portable glucose meters and flow transmitters.
Tempco	10ppm/°C max (−40°C to +85°C); ensures <±85ppm total drift over industrial ambient range, critical for oscilloscope front-end stability.
Quiescent current	0.65µA typical active, 0.1µA max shutdown; enables >10-year battery life in fault indicators and wireless sensor nodes.
Low-frequency noise	3.3ppm_P-P (0.1Hz–10Hz); meets noise floor requirements for precision thermocouple and bridge sensor signal chains.
Long-term stability	40ppm at 1000 hours; predictable aging behavior supports 15-year reliability planning in power quality analyzers.
Thermal hysteresis	70ppm max (25°C → −40°C → +125°C → 25°C); maintains repeatability after thermal cycling in optical module control loops.

Pinout & Package

REF35250YBHR uses a 4-pin Wafer Chip Scale Package (WCSP) with 1.05mm × 0.84mm body size, optimized for space-constrained PCB layouts in handheld diagnostics and IoT edge nodes.

Pin/Terminal	Circuit Role	Design Meaning
GND (B1)	Ground reference	Primary device ground; connects to PCB ground plane to minimize noise coupling into reference output.
EN (B2)	Enable control input	Active-high logic input; drives device into 0.1µA shutdown when pulled low, enabling power-gating in sleep-mode systems.
VIN (A2)	Power supply input	Accepts 2.62V–6V input; dropout voltage of 120mV at 5mA allows operation from single Li-ion cell with minimal headroom.
VREF (A1)	Reference output	Stable 2.5V source; capable of sourcing 10mA or sinking 5mA to drive ADC reference inputs or op-amp bias networks directly.

Key Features

Feature	Design Value
NR pin noise reduction	External capacitor on NR pin reduces 0.1Hz–10Hz output noise to 3.3ppm_P-P, enabling sub-16-bit effective resolution in low-frequency sensor interfaces.
EN-controlled shutdown	Reduces quiescent current to 0.1µA max, extending battery life in intermittent-measurement devices like portable blood glucose monitors.
Ultra-low drift	10ppm/°C max tempco over −40°C to +85°C ensures reference stability across automotive under-hood and industrial control environments.
High output drive	±10mA output capability eliminates need for external buffer amplifiers when driving SAR ADC reference inputs or current-sense amplifier bias rails.
Robust thermal performance	70ppm thermal hysteresis and 40ppm/1k-hour long-term stability support reliable operation in optical modules subject to repeated thermal cycling.

Applications

Blood Glucose Monitor	Power Quality Analyzer
Use Scenario: Portable handheld device measuring glucose concentration via electrochemical test strip with 16-bit ADC sampling. IC Role / Device Role / Timing Role: Provides stable 2.5V reference for ADC conversion and sensor biasing circuitry. Use Value: ±0.05% initial accuracy and 10ppm/°C tempco ensure measurement repeatability across operating temperatures without recalibration.	Use Scenario: Three-phase grid monitoring unit capturing voltage/current harmonics with 16-bit isolation ADCs. IC Role / Device Role / Timing Role: Supplies precision reference to multiple ADC channels for synchronized high-fidelity waveform capture. Use Value: 3.3ppm_P-P low-frequency noise and 40ppm/1k-hour stability maintain amplitude accuracy over extended field deployment.
Oscilloscope Front-End	Optical Module Control
Use Scenario: Portable digital storage oscilloscope with 12-bit ADC and variable gain amplifier stages. IC Role / Device Role / Timing Role: Reference source for ADC and DAC used in offset correction and trigger threshold generation. Use Value: 650nA quiescent current enables low-power standby mode; EN pin allows rapid wake-up without reference settling delay.	Use Scenario: SFP+ transceiver module requiring precise bias control for laser diode drivers and TIA circuits. IC Role / Device Role / Timing Role: Stable voltage reference for DAC-controlled current sources and temperature-compensated bias networks. Use Value: 70ppm thermal hysteresis ensures repeatable laser output power after thermal cycling during pluggable module insertion/removal.

Blood Glucose Monitor

Power Quality Analyzer

Use Scenario: Portable handheld device measuring glucose concentration via electrochemical test strip with 16-bit ADC sampling.

IC Role / Device Role / Timing Role: Provides stable 2.5V reference for ADC conversion and sensor biasing circuitry.

Use Value: ±0.05% initial accuracy and 10ppm/°C tempco ensure measurement repeatability across operating temperatures without recalibration.

Use Scenario: Three-phase grid monitoring unit capturing voltage/current harmonics with 16-bit isolation ADCs.

IC Role / Device Role / Timing Role: Supplies precision reference to multiple ADC channels for synchronized high-fidelity waveform capture.

Use Value: 3.3ppm_P-P low-frequency noise and 40ppm/1k-hour stability maintain amplitude accuracy over extended field deployment.

Oscilloscope Front-End

Optical Module Control

Use Scenario: Portable digital storage oscilloscope with 12-bit ADC and variable gain amplifier stages.

IC Role / Device Role / Timing Role: Reference source for ADC and DAC used in offset correction and trigger threshold generation.

Use Value: 650nA quiescent current enables low-power standby mode; EN pin allows rapid wake-up without reference settling delay.

Use Scenario: SFP+ transceiver module requiring precise bias control for laser diode drivers and TIA circuits.

IC Role / Device Role / Timing Role: Stable voltage reference for DAC-controlled current sources and temperature-compensated bias networks.

Use Value: 70ppm thermal hysteresis ensures repeatable laser output power after thermal cycling during pluggable module insertion/removal.

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage reference applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
REF3425RTER	2.5V, ±0.05% accuracy, 12ppm/°C tempco (−40°C to +125°C), 950nA IQ, SOT-23-6 package	Higher tempco and IQ; wider operating temperature but larger footprint	Select when full −55°C to +125°C range is required and board space permits SOT-23.
ADR3425ARJZ-R7	2.5V, ±0.1% accuracy, 10ppm/°C tempco, 3.5µA IQ, SOT-23-5 package	Looser initial accuracy and 5.4× higher IQ; no EN or NR pins	Choose only if ultra-low power is not critical and enable/shutdown functionality is unnecessary.

Compared with REF3425RTER and ADR3425ARJZ-R7, REF35250YBHR delivers the lowest quiescent current (0.65µA vs ≥3.5µA), smallest footprint (WCSP vs SOT-23), and integrated EN/NR pins-making it optimal for space- and energy-constrained portable instrumentation where reference stability and startup control are essential.

Availability

REF35250YBHR is available at Aetrix Electronics and suitable for portable medical devices, industrial process analytics, optical communications modules, and battery-powered test equipment requiring stable component supply with guaranteed long-term availability.

Supply support for REF35250YBHR 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 designed specifically for ultra-low-power, high-accuracy applications including portable diagnostics, industrial sensors, and battery-operated instrumentation where nanoscale power efficiency and ppm-level stability are mandatory.

FAQ

What is the maximum operating temperature range for REF35250YBHR?

The REF35250YBHR is fully specified from −40°C to +85°C with 10ppm/°C max temperature coefficient. It remains functional across −55°C to +125°C, though tempco and accuracy specifications apply only within the −40°C to +85°C range per the official datasheet. This extended functional range supports deployment in harsh industrial and automotive environments where transient overtemperature events may occur.

Does REF35250YBHR require an external capacitor on the NR pin?

No, the NR pin of REF35250YBHR can be left floating for standard operation. However, connecting a capacitor (typically 1µF to 10µF) between NR and GND reduces 0.1Hz–10Hz output noise from 3.3ppm_P-P to lower values-critical for high-resolution sensor interfaces. The device remains fully functional without it, making NR an optional performance enhancement rather than a requirement.

What is the minimum input voltage required for REF35250YBHR to regulate at 2.5V?

The minimum input voltage for REF35250YBHR is V_REF + V_DO, where V_DO is 120mV at 5mA load and 250mV at 10mA load. Therefore, the absolute minimum VIN is 2.62V at 5mA. For V_REF = 2.5V, TI specifies minimum VIN = 2.62V under recommended conditions-enabling operation from single-cell lithium batteries with minimal headroom loss.

Can REF35250YBHR drive a 10µF output capacitor?

Yes, REF35250YBHR is stable with output capacitors from 0.1µF to 10µF, as confirmed in Section 6.6 of the datasheet. A 10µF ceramic or tantalum capacitor improves PSRR and low-frequency noise rejection, especially when paired with the NR pin. ESR must remain ≤400mΩ; typical X7R ceramics meet this requirement and enhance transient response in ADC reference applications.

How does the EN pin behavior affect system power sequencing?

The EN pin of REF35250YBHR is active-high with 0.7×VIN threshold for activation and 0.3×VIN for shutdown. When driven by a microcontroller GPIO, it enables precise control of reference turn-on timing-critical for synchronizing ADC conversions after power-up. Turn-on time is 2ms to 0.1% settling, allowing deterministic system initialization without waiting for uncontrolled reference stabilization.

REF35250YBHR 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):: 2.5V

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:: 2.75V ~ 6V

Current - Supply:: 2.6µA

Current - Cathode:: -

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 4-DSBGA

REF35250YBHR FAQ

1.How can I place an order for REF35250YBHR through Aetrix?

Please submit a Request for Quotation (RFQ) for REF35250YBHR 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 REF35250YBHR reliable?

The price and inventory of REF35250YBHR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF35250YBHR is usually 5 days.

3.What payment methods are accepted for REF35250YBHR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF35250YBHR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for REF35250YBHR?

REF35250YBHR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your REF35250YBHR 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 REF35250YBHR?

For technical support, including REF35250YBHR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF35250YBHR requirements.

6.How does Aetrix verify that REF35250YBHR is sourced from the original manufacturer or authorized distributors?

All REF35250YBHR 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 REF35250YBHR meets industry standards.

7.What is the process for return or replacement of REF35250YBHR?

All REF35250YBHR units undergo pre-shipment inspection (PSI). If there is an issue with REF35250YBHR, 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 REF35250YBHR part is unused and in its original packaging.

Return procedure for REF35250YBHR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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