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

STMicroelectronics TS4061AILT-1.225

Name: TS4061AILT-1.225
Brand: STMicroelectronics
SKU: TS4061AILT-1.225
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TS4061AILT-1.225

Manufacturer:: STMicroelectronics

Category:: Voltage Reference

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: TS4061AILT-1.225.pdf

Description:: IC VREF SHUNT 0.1% SOT23-3

Quantity:: RFQ Add To RFQ list

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Inventory:5,444

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Product details

Overview

TS4061AILT-1.225 from STMicroelectronics is a precision micropower shunt voltage reference delivering a fixed 1.225 V output with ±0.1% initial accuracy at 25 °C, ultra-low 10 µA operating current, and 35 ppm/°C max temperature coefficient over –40 to +85 °C. It enables high-accuracy analog signal conditioning in space-constrained, battery-powered instrumentation.

For engineers reviewing the TS4061AILT-1.225 datasheet, TS4061AILT-1.225 pinout, TS4061AILT-1.225 application, or TS4061AILT-1.225 equivalent, key selection criteria include shunt reference stability under capacitive loads, low-frequency noise (10 µV_p-p), thermal hysteresis (120 ppm), static impedance (0.3 Ω max), and SOT23-3L package compatibility with portable PCB layouts.

Technical Context

The TS4061AILT-1.225 operates as a two-terminal shunt reference, sinking current to maintain a precise 1.225 V cathode-to-anode voltage. Its bandgap-derived core achieves ±0.1% tolerance at 25 °C and maintains regulation across 10 µA–15 mA operating current range.

It exhibits very low 10 µV_p-p low-frequency noise (0.1–10 Hz) and stable performance with capacitive loads-critical for high-resolution ADC biasing and sensor excitation circuits where supply rejection and long-term drift matter.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.225 V; provides stable reference for 12-bit+ SAR ADCs and precision DACs
Initial Accuracy	±0.1% at 25 °C; ensures <1.23 mV absolute error without calibration
Operating Current	10 µA typical at 25 °C; extends battery life in multi-year IoT sensor nodes
Tempco	≤35 ppm/°C; limits drift to <2.9 mV over full –40 to +85 °C range
Low-Freq Noise	10 µV_p-p (0.1–10 Hz); avoids noise-induced quantization errors in µV-level measurements
Static Impedance	0.3 Ω max; minimizes load-induced voltage shift in dynamic current-sink applications
Thermal Hysteresis	120 ppm; guarantees repeatability after thermal cycling in field-deployed equipment

Pinout & Package

TS4061AILT-1.225 is housed in a SOT23-3L package (3-pin, surface-mount, lead-free, ECOPACK® compliant). Pin 1 is Anode, Pin 2 is Cathode, and Pin 3 is NC (No Connect)-must be left unconnected or tied to Anode per datasheet guidance.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Reference return path	Connects to system ground or low-impedance return; defines reference potential baseline
Cathode (Pin 2)	Stable voltage output node	Sinks current to maintain 1.225 V; connects to ADC REF+, op-amp non-inverting input, or sensor bridge
NC (Pin 3)	Unused terminal	Must remain unconnected or tied to Anode; no internal connection or function

Key Features

Feature	Design Value
Ultra-low quiescent current	10 µA operation enables >10-year battery life in coin-cell-powered data loggers
Capacitive-load stability	No external compensation required up to 100 nF-simplifies layout in compact sensor modules
Industrial temperature range	–40 to +85 °C operation supports deployment in outdoor metering and factory-floor instrumentation
Low thermal hysteresis	120 ppm ensures repeatable voltage after ambient cycling-critical for recalibration-free field devices

Applications

Portable Medical Sensors

High-Resolution Data Acquisition

Use Scenario: Wearable ECG front-end with 16-bit delta-sigma ADC requiring stable excitation and reference.

IC Role / Device Role / Timing Role: Shunt reference providing 1.225 V for ADC VREF and transducer biasing.

Use Value: ±0.1% accuracy and 10 µV_p-p noise ensure <0.002% measurement uncertainty without trimming.

Use Scenario: Battery-powered environmental monitoring node measuring thermistor, RTD, and gas sensors.

IC Role / Device Role / Timing Role: Precision voltage reference for ratiometric sensor excitation and ADC reference.

Use Value: 35 ppm/°C tempco and 120 ppm hysteresis enable ±0.05 °C repeatability across seasonal temperature swings.

Industrial Process Transmitters

Low-Power IoT Edge Nodes

Use Scenario: 4–20 mA loop-powered pressure transmitter with HART modulation.

IC Role / Device Role / Timing Role: Shunt reference establishing accurate current-sense threshold and ADC reference in tight power budget.

Use Value: 10 µA operating current allows full functionality within 3.5 mA loop budget while maintaining 0.1% calibration integrity.

Use Scenario: Sub-GHz wireless sensor node (LoRaWAN/NB-IoT) sampling temperature/humidity every 5 minutes.

IC Role / Device Role / Timing Role: Reference source for microcontroller's internal ADC and external analog front-end.

Use Value: SOT23-3L footprint and 10 µA draw reduce PCB area and extend CR2032 battery life beyond 5 years.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLVH431ACDBVR	Adjustable (1.24–18 V), ±0.5% initial accuracy, 80 µA min operating current	Requires external resistor divider; higher current draw reduces battery life	Choose when adjustable output or higher voltage (>1.25 V) is needed
REF3012AIDBZR	Series reference, 1.2 V output, ±0.2% accuracy, 50 µA quiescent current	Three-terminal architecture requires dedicated input supply rail; not shunt-compatible	Prefer only if series topology simplifies system power architecture

Compared with TLVH431ACDBVR and REF3012AIDBZR, TS4061AILT-1.225 offers superior initial accuracy (±0.1% vs ±0.5%/±0.2%), lowest operating current (10 µA vs 80/50 µA), and true two-terminal simplicity-making it optimal for ultra-low-power, fixed-voltage shunt reference use cases where board space and battery longevity are critical.

Availability

TS4061AILT-1.225 is available at Aetrix Electronics and suitable for portable medical sensors, industrial process transmitters, and low-power IoT edge nodes requiring stable component supply with guaranteed long-term availability.

Supply support for TS4061AILT-1.225 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 microcontrollers, power ICs, sensors, and analog components for industrial, automotive, and consumer markets.

The TS4061 belongs to ST's precision analog reference product line, engineered specifically for high-accuracy, low-power, space-constrained applications including portable instrumentation and battery-operated sensing systems.

FAQ

What is the minimum operating current required for regulation?

The TS4061AILT-1.225 requires a minimum operating current of 10 µA at 25 °C to maintain regulation, rising to 12 µA across the full –40 to +85 °C industrial temperature range. Below this threshold, output voltage deviates beyond specified tolerance, making it unsuitable for sub-10 µA ultra-low-power sleep modes without auxiliary biasing.

Can TS4061AILT-1.225 drive a 100 nF capacitive load?

Yes-the TS4061AILT-1.225 is explicitly characterized for stable operation with up to 100 nF capacitive loads, as confirmed by startup waveform testing in the datasheet (Figure 9). No series resistance or external compensation is required, simplifying design in sensor interfaces with filtering capacitance.

Is Pin 3 (NC) electrically connected internally?

No-Pin 3 is a no-connect terminal with no internal bond wire or silicon connection. The datasheet mandates it be left floating or tied to the Anode (Pin 1); connecting it to any other potential may cause undefined behavior or damage due to unintended current paths.

How does thermal hysteresis affect long-term calibration stability?

Thermal hysteresis of 120 ppm means the output voltage may shift up to 148 µV after cycling between –40 °C and +85 °C and returning to 25 °C. This is a non-cumulative, repeatable offset-not drift-and must be accounted for in systems requiring recalibration-free operation over extended field life.

TS4061AILT-1.225 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: TO-236-3, SC-59, SOT-23-3

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Reference Type:: Shunt

Output Type:: Fixed

Voltage - Output (Min/Fixed):: 1.225V

Voltage - Output (Max):: -

Current - Output:: 15 mA

Tolerance:: ±0.1%

Temperature Coefficient:: 35ppm/°C

Noise - 0.1Hz to 10Hz:: 10µVp-p

Noise - 10Hz to 10kHz:: 95µVrms

Voltage - Input:: -

Current - Supply:: -

Current - Cathode:: 12 µA

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

TS4061AILT-1.225 FAQ

1.How can I place an order for TS4061AILT-1.225 through Aetrix?

Please submit a Request for Quotation (RFQ) for TS4061AILT-1.225 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 TS4061AILT-1.225 reliable?

The price and inventory of TS4061AILT-1.225 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS4061AILT-1.225 is usually 5 days.

3.What payment methods are accepted for TS4061AILT-1.225?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS4061AILT-1.225 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS4061AILT-1.225?

TS4061AILT-1.225 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS4061AILT-1.225 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 TS4061AILT-1.225?

For technical support, including TS4061AILT-1.225 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS4061AILT-1.225 requirements.

6.How does Aetrix verify that TS4061AILT-1.225 is sourced from the original manufacturer or authorized distributors?

All TS4061AILT-1.225 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 TS4061AILT-1.225 meets industry standards.

7.What is the process for return or replacement of TS4061AILT-1.225?

All TS4061AILT-1.225 units undergo pre-shipment inspection (PSI). If there is an issue with TS4061AILT-1.225, 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 TS4061AILT-1.225 part is unused and in its original packaging.

Return procedure for TS4061AILT-1.225:

1.Submit a request within 90 days.

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

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