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

STMicroelectronics TS3333AQPR

Name: TS3333AQPR
Brand: STMicroelectronics
SKU: TS3333AQPR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TS3333AQPR

Manufacturer:: STMicroelectronics

Category:: Voltage Reference

Package:: 8-UFQFN

Datasheet:: TS3333AQPR.pdf

Description:: IC VREF SERIES 0.15% 8QFN

Quantity:: RFQ Add To RFQ list

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Inventory:4,439

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Product details

Overview

TS3333AQPR from STMicroelectronics is a micropower, high-precision series voltage reference delivering a stable 3.3 V output with ±0.15 % initial accuracy, 3.9 μA typical quiescent current at 25 °C, and 30 ppm/°C max temperature coefficient over –40 to +125 °C. It supports capacitive loads up to 10 µF and operates from 3.5 V to 5.5 V input, enabling use in ultra-low-power data acquisition front-ends.

For engineers reviewing the TS3333AQPR datasheet, TS3333AQPR pinout, TS3333AQPR application, or TS3333AQPR equivalent, key selection criteria include dropout voltage (≤100 mV at ±5 mA), low-frequency noise (73 µV_P-P, 0.1–10 Hz), load regulation (±20 ppm/mA over full temperature range), and QFN8 1.5×1.5 mm package compatibility with space-constrained PCB layouts.

Technical Context

The TS3333AQPR is a two-terminal series voltage reference-functionally an active shunt regulator with internal feedback-designed for precision biasing and ADC/DAC reference applications. Its architecture achieves stability with ceramic output capacitors ≥0.1 µF and maintains regulation under ±5 mA sourcing/sinking load conditions.

It features internal thermal shutdown and short-circuit protection, with guaranteed operation across industrial and automotive temperature ranges. The device exhibits monotonic output voltage vs. temperature behavior and demonstrates <2 ms turn-on settling time to 0.1 % with 1 µF output capacitance.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	3.3 V nominal; enables direct interface with 3.3 V logic and SAR ADC references without scaling.
Initial Accuracy	±0.15 % at 25 °C; reduces calibration overhead in portable instrumentation and medical sensors.
Temp Coefficient	Max 30 ppm/°C (–40 to +125 °C); ensures ≤±0.99 mV drift over full range, critical for multi-decade measurement systems.
Quiescent Current	3.9 μA typ. at 25 °C; supports >10-year battery life in wireless sensor nodes drawing <10 μA average current.
Dropout Voltage	100 mV max at ±5 mA load; allows operation from single-cell Li-ion (3.0–3.6 V) or regulated 3.3 V rails with margin.
Noise (0.1–10 Hz)	73 µV_P-P; limits RMS error to ~23 µV in 24-bit delta-sigma ADC reference paths.
Capacitive Load Range	0.1–10 µF; compatible with low-ESR X7R ceramics, eliminating need for external compensation.

Pinout & Package

TS3333AQPR is supplied in QFN8 1.5×1.5 mm package with wettable flanks, optimized for automated optical inspection and thermal performance (R_thJA = 159 °C/W). Pin 1 is IN, Pin 2 is OUT, Pin 3 is GND; Pins 4–8 are NC (no connect) and must be left floating or grounded per layout guidelines.

Pin/Terminal	Circuit Role	Design Meaning
1 (IN)	Input supply terminal	Accepts 3.5–5.5 V DC; requires local 1 µF decoupling capacitor to minimize line transient sensitivity.
2 (OUT)	Precision reference output	Delivers regulated 3.3 V; connects directly to ADC REF+ or op-amp reference inputs with minimal trace inductance.
3 (GND)	Analog ground reference	Must be tied to clean analog ground plane; separate from digital ground to avoid noise coupling into reference path.
4–8 (NC)	No-connect terminals	Internally unconnected; may be grounded for mechanical stability but must not be used as thermal pads or signal paths.

Key Features

Feature	Design Value
Ultra-low IQ	3.9 μA typ. enables energy harvesting and coin-cell-powered designs with >5-year shelf life.
Extended temp range	–40 to +125 °C operation supports under-hood automotive sensors and industrial process controllers.
Stable with ceramic caps	Validated for 0.1–10 µF X7R ceramics; eliminates tantalum or electrolytic dependencies and improves reliability.
High PSRR	≥60 dB at 1 kHz (SVR plot Fig. 7); rejects switching regulator ripple in mixed-signal power domains.
Fast turn-on	2 ms settling to 0.1 % with 1 µF C_OUT; meets timing requirements of burst-mode data loggers and wake-on-event systems.

Applications

Portable ECG Monitors

Industrial RTD Signal Conditioning

Use Scenario: Battery-powered handheld ECG units acquiring microvolt-level cardiac signals with 24-bit resolution.

IC Role / Device Role / Timing Role: Primary voltage reference for sigma-delta ADC and analog front-end biasing.

Use Value: ±0.15 % accuracy and 73 µV_P-P noise ensure <1 µV baseline error and enable detection of sub-millivolt ST-segment deviations.

Use Scenario: 4-wire RTD measurement module in programmable logic controller (PLC) I/O cards.

IC Role / Device Role / Timing Role: Stable excitation and reference source for ratiometric bridge measurements.

Use Value: 30 ppm/°C tempco and –40 to +125 °C rating maintain <0.05 % system gain error across ambient cabinet temperatures.

Wireless Pressure Transmitters

Calibration Equipment Reference

Use Scenario: LoRaWAN-enabled pressure sensor node operating on CR2032 coin cell for 5+ years.

IC Role / Device Role / Timing Role: Low-power reference for ADC and internal LDO feedback divider.

Use Value: 3.9 μA IQ and 100 mV dropout allow direct regulation from depleted 2.7 V battery, extending usable voltage range.

Use Scenario: Benchtop multimeter calibration fixture requiring traceable 3.3 V reference with <10 ppm/year drift.

IC Role / Device Role / Timing Role: Secondary reference standard in metrology-grade test equipment.

Use Value: Factory-trimmed ±0.15 % accuracy and 8 ppm/°C typical tempco over –40 to +125 °C support ISO/IEC 17025-compliant uncertainty budgets.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADR3433ARJZ-R7	Higher IQ (120 μA), lower noise (4.8 µV_RMS), tighter tempco (10 ppm/°C), SOT23-5 package	Better for noise-sensitive precision DACs; unsuitable for battery life >2 years	Choose when ultra-low noise outweighs quiescent current constraints
REF3333AIDBZR	Similar IQ (3.8 μA), higher initial accuracy (±0.05 %), same tempco (30 ppm/°C), SOT23-3 package	Preferred for factory-calibrated instruments needing tighter initial tolerance	Choose when ±0.05 % initial accuracy is mandatory and QFN8 footprint is not required

Compared with ADR3433ARJZ-R7 and REF3333AIDBZR, TS3333AQPR uniquely balances ultra-low IQ, QFN8 space efficiency, and automotive-grade temperature capability-making it optimal for compact, long-life, wide-temperature embedded systems where moderate noise and ±0.15 % accuracy are acceptable.

Availability

TS3333AQPR is available at Aetrix Electronics and suitable for portable medical devices, industrial data loggers, and wireless sensor networks requiring stable component supply with guaranteed long-term availability and controlled parametric drift.

Supply support for TS3333AQPR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, MCU, power, and sensing solutions for industrial, automotive, and consumer markets.

TS33 belongs to ST's precision analog portfolio, engineered specifically for ultra-low-power, high-accuracy reference applications in harsh environments-emphasizing stability, small form factor, and extended temperature resilience.

FAQ

What is the minimum input voltage required for TS3333AQPR to regulate at 3.3 V?

The minimum input voltage is 3.5 V, as specified in Table 8 for VIN = 3.5 V to 5.5 V under load conditions. At ±5 mA output current, the dropout voltage is ≤100 mV, meaning the device ceases regulation if input falls below 3.4 V. Operation below 3.5 V is not characterized and may result in degraded accuracy or instability.

Can TS3333AQPR drive a 10 kΩ load directly without external buffering?

Yes. With ±5 mA maximum output current and 3.3 V output, TS3333AQPR can directly drive loads ≥660 Ω (3.3 V ÷ 5 mA). A 10 kΩ load draws only 330 µA, well within spec, and introduces negligible load regulation error (±6 ppm/mA × 0.33 mA ≈ ±2 ppm), preserving accuracy.

Is the QFN8 package of TS3333AQPR RoHS and REACH compliant?

Yes. Per Section 6 of the DS12001 datasheet, TS3333AQPR uses ST's ECOPACK®2-compliant QFN8 package, meeting RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, including SVHC screening. Full compliance documentation is available via ST's quality portal using order code TS3333AQPR.

Does TS3333AQPR require an input capacitor, and if so, what value is recommended?

Yes. Figure 2 shows a 1 µF ceramic input capacitor (C_IN) placed close to the IN pin. This minimizes high-frequency noise coupling and stabilizes the input during load transients. ST specifies no minimum C_IN, but 1 µF X7R is validated for all performance plots-including line transients (Fig. 13–14) and startup (Fig. 11–12).

TS3333AQPR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 8-UFQFN

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:: 5 mA

Tolerance:: ±0.15%

Temperature Coefficient:: 30ppm/°C

Noise - 0.1Hz to 10Hz:: 73µVp-p

Noise - 10Hz to 10kHz:: -

Voltage - Input:: 1.8V ~ 5.5V

Current - Supply:: 10µA

Current - Cathode:: -

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-QFN (1.5x1.5)

TS3333AQPR FAQ

1.How can I place an order for TS3333AQPR through Aetrix?

Please submit a Request for Quotation (RFQ) for TS3333AQPR 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 TS3333AQPR reliable?

The price and inventory of TS3333AQPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS3333AQPR is usually 5 days.

3.What payment methods are accepted for TS3333AQPR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS3333AQPR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS3333AQPR?

TS3333AQPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS3333AQPR 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 TS3333AQPR?

For technical support, including TS3333AQPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS3333AQPR requirements.

6.How does Aetrix verify that TS3333AQPR is sourced from the original manufacturer or authorized distributors?

All TS3333AQPR 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 TS3333AQPR meets industry standards.

7.What is the process for return or replacement of TS3333AQPR?

All TS3333AQPR units undergo pre-shipment inspection (PSI). If there is an issue with TS3333AQPR, 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 TS3333AQPR part is unused and in its original packaging.

Return procedure for TS3333AQPR:

1.Submit a request within 90 days.

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

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