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

STMicroelectronics TS3325AQPR

Name: TS3325AQPR
Brand: STMicroelectronics
SKU: TS3325AQPR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TS3325AQPR

Manufacturer:: STMicroelectronics

Category:: Voltage Reference

Package:: 8-UFQFN

Datasheet:: TS3325AQPR.pdf

Description:: IC VREF SERIES 0.15% 8QFN

Quantity:: RFQ Add To RFQ list

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Inventory:1,321

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Product details

Overview

TS3325AQPR from STMicroelectronics is a micropower, high-precision series voltage reference delivering a stable 2.5 V output with ±0.15 % initial accuracy, 3.9 μA typical quiescent current at 25 °C, and 30 ppm/°C max temperature coefficient across –40 to +125 °C. It supports capacitive loads up to 10 µF and operates from 2.7 V to 5.5 V input, enabling use in portable instrumentation and medical data acquisition systems.

For engineers reviewing the TS3325AQPR datasheet, TS3325AQPR pinout, TS3325AQPR application, or TS3325AQPR equivalent, key selection criteria include ultra-low IQ for battery life extension, tight initial tolerance for calibration-critical signal chains, thermal stability over automotive-grade temperature range, and QFN8 1.5×1.5 mm package compatibility with space-constrained PCB layouts.

Technical Context

The TS3325AQPR uses a bandgap-based series topology with internal trimming for precision, achieving 0.15 % initial accuracy without external calibration. Its low dropout voltage (50–100 mV at ±5 mA) enables operation near supply rails, while its 2 ms turn-on settling time ensures fast power-up in wake-up-sensitive systems.

Designed for high-stability analog front-ends, it features 57 µV_P-P low-frequency noise (0.1–10 Hz), 60 dB supply voltage rejection at 1 kHz, and guaranteed stability with 0.1–10 µF ceramic output capacitance-critical for ADC reference buffers and sensor signal conditioning.

Key Specifications

Parameter	Value and Actual Design Meaning
Output voltage	2.5 V nominal - precise reference for 12-bit+ SAR ADCs and DACs requiring stable mid-scale bias.
Initial accuracy	±0.15 % - eliminates need for system-level trimming in portable medical monitors and handheld test equipment.
Quiescent current	3.9 μA typ. at 25 °C - extends battery life beyond 10 years in always-on IoT sensor nodes drawing <10 μA average.
Tempco	≤30 ppm/°C (–40 to +125 °C) - maintains <±300 ppm total drift over full industrial range, suitable for unheated lab instruments.
Dropout voltage	50–100 mV at ±5 mA - allows direct regulation from single-cell Li-ion (3.0–3.6 V) or 3.3 V LDO outputs.
Noise (0.1–10 Hz)	57 µV_P-P - contributes <0.023 LSB error in 2.5 V / 16-bit (≈38 µV LSB) systems.
Capacitive load range	0.1–10 µF - compatible with standard X7R ceramics, simplifying layout and eliminating ESR requirements.

Pinout & Package

TS3325AQPR is supplied in QFN8 1.5×1.5 mm package with wettable flanks, optimized for automated optical inspection and high-density routing. Thermal resistance R_thJA = 159 °C/W enables operation at full spec without heatsinking below 70 °C ambient.

Pin	Circuit Role	Design Meaning
1	IN	Input supply connection - accepts 2.7–5.5 V; requires ≥1 µF bypass capacitor per datasheet Figure 2.
2	OUT	Regulated 2.5 V output - drives reference inputs of ADCs, DACs, or comparators; stable with 0.1–10 µF ceramic load.
3	GND	Analog ground return - must be connected to low-impedance PCB ground plane adjacent to OUT pin to minimize noise coupling.
4–8	NC	No-connect terminals - internally unconnected; may be tied to GND for mechanical reinforcement but not electrically used.

Key Features

Feature	Design Value
Micropower operation	3.9 μA typical IQ enables >10-year battery life in coin-cell-powered portable calibrators.
High-temperature stability	Guaranteed ±0.15 % accuracy and ≤30 ppm/°C drift from –40 to +125 °C supports under-hood automotive sensors.
Capacitor-compatible design	Stable with 0.1–10 µF ceramic output caps - removes need for tantalum or electrolytic, reducing BOM cost and footprint.
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.
Low-output-noise architecture	57 µV_P-P (0.1–10 Hz) - minimizes quantization uncertainty in precision 16-bit+ measurement systems.

Applications

Portable Medical Monitors

Data Acquisition Modules

Use Scenario: Battery-powered ECG front-end with 16-bit delta-sigma ADC sampling at 1 kSPS.

IC Role / Device Role / Timing Role: Precision 2.5 V reference for ADC VREF input, ensuring accurate amplitude reconstruction of microvolt-level cardiac signals.

Use Value: ±0.15 % initial accuracy and 57 µV_P-P noise limit measurement error to <0.025 % full-scale, meeting AAMI EC11 clinical standards.

Use Scenario: Industrial 8-channel thermocouple logger with cold-junction compensation.

IC Role / Device Role / Timing Role: Stable reference for programmable gain instrumentation amplifier and 24-bit sigma-delta ADC.

Use Value: 30 ppm/°C tempco ensures <±0.075 °C absolute error over –25 to +70 °C operating range without software correction.

Handheld Test Equipment

Automotive Sensor Signal Conditioning

Use Scenario: Pocket-sized multimeter with autoranging 200 mV–1000 V DC/AC measurement.

IC Role / Device Role / Timing Role: Primary reference for internal 22-bit integrating ADC and auto-zero calibration circuitry.

Use Value: Ultra-low 3.9 μA IQ extends alkaline AA battery life to >200 hours of continuous use between replacements.

Use Scenario: Exhaust gas temperature (EGT) sensor module mounted near engine manifold (–40 to +125 °C).

IC Role / Device Role / Timing Role: Reference for ratiometric bridge excitation and analog front-end amplification.

Use Value: Guaranteed operation and ±0.15 % accuracy across full automotive temperature range eliminate need for external temperature compensation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX6025AESA+	2.5 V, ±0.1 % initial accuracy, 1.5 μA IQ, SO-8 package - tighter accuracy but higher cost and larger footprint.	Used in metrology-grade benchtop instruments where 0.05 % extra accuracy justifies SO-8 thermal mass and $3.20 unit cost.	Select when absolute initial accuracy outweighs size and power constraints; not drop-in due to different pinout and thermal behavior.
ADR3425ARJZ-R7	2.5 V, ±0.1 % accuracy, 12 μA IQ, SOT-23-5 - lower accuracy tolerance but higher drive capability (10 mA).	Preferred in PLC I/O modules requiring reference buffering for multiple ADCs and DACs simultaneously.	Choose when sourcing >5 mA or driving multiple loads is required; avoid in ultra-low-power designs due to 3× higher IQ.

Compared with MAX6025AESA+ and ADR3425ARJZ-R7, TS3325AQPR uniquely balances sub-4 μA quiescent current, QFN8 space efficiency, and automotive-grade temperature performance - making it optimal for compact, battery-operated, high-accuracy measurement systems where board area and energy budget are tightly constrained.

Availability

TS3325AQPR is available at Aetrix Electronics and suitable for portable medical monitors, industrial data acquisition modules, and handheld test equipment requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for TS3325AQPR 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 silicon solutions for smart mobility, power management, and precision analog applications.

The TS33 family belongs to ST's precision analog portfolio, engineered specifically for ultra-low-power, high-accuracy voltage references in portable and harsh-environment instrumentation - emphasizing thermal stability, small-footprint packaging, and robust capacitive-load compatibility.

FAQ

What is the minimum input voltage required for TS3325AQPR to regulate at 2.5 V?

The TS3325AQPR requires a minimum input voltage of 2.7 V to maintain regulation at 2.5 V output, as specified in Table 6 of DS12001 Rev 6. At ±5 mA load, the dropout voltage ranges from 50 mV (typ.) to 100 mV (max), meaning VIN must exceed VOUT by at least this margin across temperature and current conditions.

Can TS3325AQPR drive a 10 µF ceramic output capacitor stably?

Yes - the TS3325AQPR is explicitly characterized and guaranteed stable with output capacitance from 0.1 µF to 10 µF, including X7R and X5R ceramic types, as confirmed in Figure 18 (Stability Plan) and Table 6 electrical characteristics. No series resistor or ESR requirement is needed.

Does TS3325AQPR support operation at 125 °C junction temperature?

No - the maximum junction temperature is +150 °C, but the device is rated for continuous operation up to +125 °C ambient temperature (T_oper). At 125 °C ambient, power dissipation must remain within limits defined by R_thJA = 159 °C/W (QFN8), ensuring T_j stays below 150 °C under worst-case load and layout conditions.

Is the QFN8 package of TS3325AQPR RoHS and REACH compliant?

Yes - TS3325AQPR is manufactured in STMicroelectronics' ECOPACK®-compliant QFN8 package, meeting RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Full compliance documentation, including material declarations and substance thresholds, is available via ST's official product page and ECOPACK portal.

TS3325AQPR 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):: 2.5V

Voltage - Output (Max):: -

Current - Output:: -

Tolerance:: ±0.15%

Temperature Coefficient:: 30ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: -

Voltage - Input:: 1.8V ~ 5.5V

Current - Supply:: 10µA

Current - Cathode:: -

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

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

TS3325AQPR FAQ

1.How can I place an order for TS3325AQPR through Aetrix?

Please submit a Request for Quotation (RFQ) for TS3325AQPR 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 TS3325AQPR reliable?

The price and inventory of TS3325AQPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS3325AQPR is usually 5 days.

3.What payment methods are accepted for TS3325AQPR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS3325AQPR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS3325AQPR?

TS3325AQPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS3325AQPR 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 TS3325AQPR?

For technical support, including TS3325AQPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS3325AQPR requirements.

6.How does Aetrix verify that TS3325AQPR is sourced from the original manufacturer or authorized distributors?

All TS3325AQPR 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 TS3325AQPR meets industry standards.

7.What is the process for return or replacement of TS3325AQPR?

All TS3325AQPR units undergo pre-shipment inspection (PSI). If there is an issue with TS3325AQPR, 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 TS3325AQPR part is unused and in its original packaging.

Return procedure for TS3325AQPR:

1.Submit a request within 90 days.

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

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