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

STMicroelectronics TS4061AICT-1.225

Name: TS4061AICT-1.225
Brand: STMicroelectronics
SKU: TS4061AICT-1.225
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TS4061AICT-1.225

Manufacturer:: STMicroelectronics

Category:: Voltage Reference

Package:: SC-70, SOT-323

Datasheet:: TS4061AICT-1.225.pdf

Description:: IC VREF SHUNT 0.1% SOT323

Quantity:: RFQ Add To RFQ list

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Inventory:5,939

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Product details

Overview

TS4061AICT-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 across –40 to +85 °C. It supports stable operation with capacitive loads and is used in high-resolution ADC biasing and portable sensor signal conditioning.

For engineers reviewing the TS4061AICT-1.225 datasheet, TS4061AICT-1.225 pinout, TS4061AICT-1.225 application, or TS4061AICT-1.225 equivalent, key selection criteria include low-current regulation capability, low-frequency noise (10 µV_p-p), thermal hysteresis (120 ppm), static impedance (0.15–0.3 Ω), and SOT323-3L package compatibility for space-constrained designs.

Technical Context

The TS4061AICT-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 stability over industrial temperature range via curvature-compensated design.

It exhibits low dynamic impedance (0.15–0.3 Ω) and minimal voltage drift with load current (≤4 mV over 1 mA to 15 mA), enabling accurate closed-loop feedback in low-power LDOs and precision current sources where headroom is limited.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.225 V; enables direct replacement of 1.2 V–1.25 V references in ADC/DAC reference chains without resistor scaling.
Initial Accuracy	±0.1% at 25 °C (TS4061A grade); ensures ≤1.23 mV absolute error in 12-bit systems requiring <0.5 LSB reference uncertainty.
Operating Current	10 µA typical at 25 °C; allows continuous operation from microampere-level battery sources (e.g., coin cells) for >10-year lifetime in IoT sensors.
Tempco	Max 35 ppm/°C; contributes ≤43 µV drift over full –40 to +85 °C range-critical for uncalibrated field instrumentation.
Low-Freq Noise	10 µV_p-p (0.1–10 Hz); preserves SNR in 24-bit delta-sigma ADC front-ends without external filtering.
Static Impedance	0.15–0.3 Ω; minimizes output voltage shift under varying sink current, essential for stable biasing of op-amp input stages.

Pinout & Package

TS4061AICT-1.225 is housed in a SOT323-3L surface-mount package (1.8 × 1.35 × 0.8 mm), optimized for PCB area savings in wearables and compact modules. The device has three terminals, with Pin 3 (NC) designated as no-connect but optionally tied to anode per datasheet guidance.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Reference return path	Connected to system ground or low-impedance return node; defines cathode voltage relative to this point.
Cathode (Pin 2)	Stable output node	Provides regulated 1.225 V; sinks current from external bias resistor or active circuitry.
NC (Pin 3)	No-connect terminal	Must be left floating or connected to anode; no internal connection-used only for mechanical symmetry in SOT323-3L mold.

Key Features

Feature	Design Value
Ultra-low quiescent current	10 µA enables multi-year operation from CR2032 batteries in always-on sensor nodes.
Capacitive-load stability	Remains stable with ≥100 nF output capacitance-eliminates need for series isolation resistors in noisy environments.
Thermal hysteresis	120 ppm ensures repeatable voltage after thermal cycling, critical for calibration-critical test equipment.
Wide operating current range	Regulates reliably from 10 µA to 15 mA-supports both ultra-low-power sleep modes and higher-drive analog circuits.

Applications

Portable Medical Sensors

High-Resolution Data Acquisition

Use Scenario: Continuous glucose monitor (CGM) analog front-end requiring stable excitation voltage for electrochemical transducers.

IC Role / Device Role / Timing Role: Shunt reference providing 1.225 V bias to transimpedance amplifier and ADC reference input.

Use Value: 10 µA current draw extends single-CR2032 battery life beyond 3 years; ±0.1% accuracy avoids recalibration during 24-month field deployment.

Use Scenario: 24-bit sigma-delta ADC in portable power quality analyzer measuring grid harmonics.

IC Role / Device Role / Timing Role: Precision voltage reference for ADC VREF input and DAC output buffer biasing.

Use Value: 10 µV_p-p low-frequency noise prevents degradation of effective resolution below 22.5 bits at 10 Hz bandwidth.

Industrial Process Transmitters

Battery-Powered IoT Nodes

Use Scenario: 4–20 mA loop-powered pressure transmitter operating in ambient temperatures from –40 to +85 °C.

IC Role / Device Role / Timing Role: Reference source for current-sense amplifier and microcontroller ADC, sharing same supply rail.

Use Value: 35 ppm/°C tempco limits total reference drift to <1.5 mV over full range-within 0.12% FS error budget for Class A transmitters.

Use Scenario: LoRaWAN soil moisture sensor node powered by Li-SOCl₂ primary cell with 10-year shelf life.

IC Role / Device Role / Timing Role: Voltage reference for MCU's internal ADC and external analog sensor interface.

Use Value: Stable regulation down to 7.5 µA minimum current ensures reliable startup and measurement even at end-of-life battery voltage (2.2 V).

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLVH431AIDBZR	Adjustable (2.5 V min), ±0.5% initial accuracy, 80 µA typical I_Q, SOT23-3	Requires external resistor divider; higher current increases battery drain in ultra-low-power use cases.	Select when adjustable output or higher voltage (>1.25 V) is required; avoid where 1.225 V fixed output and sub-15 µA operation are mandatory.
MAX6008AEUR+T	Fixed 1.25 V, ±0.2% accuracy, 35 µA I_Q, SOT23-3	Higher operating current reduces battery life; 1.25 V output requires gain adjustment in 1.225 V–optimized signal chains.	Choose only if 1.25 V output aligns with existing design; not suitable for 1.225 V–specific calibration or legacy layout reuse.

Compared with TLVH431AIDBZR and MAX6008AEUR+T, TS4061AICT-1.225 uniquely delivers factory-trimmed 1.225 V output, ±0.1% accuracy, and 10 µA operation in SOT323-3L-enabling direct drop-in replacement in space- and power-constrained 1.225 V reference designs without resistor changes or layout revision.

Availability

TS4061AICT-1.225 is available at Aetrix Electronics and suitable for portable medical sensors, high-resolution data acquisition systems, and battery-powered IoT nodes requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TS4061AICT-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 analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The TS4061 belongs to ST's precision analog reference product line, engineered specifically for ultra-low-power, high-accuracy voltage referencing in battery-operated and space-constrained instrumentation applications.

FAQ

What is the minimum operating current for stable regulation?

The TS4061AICT-1.225 requires a minimum operating current of 10 µA at 25 °C and 12 µA across the full –40 to +85 °C range to maintain regulation within specification. Below this threshold, output voltage deviates nonlinearly and may fall outside ±0.1% tolerance.

Can it drive a 100 nF capacitive load without oscillation?

Yes-the TS4061AICT-1.225 is explicitly characterized for stability with up to 100 nF capacitive loads, as confirmed in Figure 9 of the datasheet. No series isolation resistor is needed, simplifying layout and reducing component count in noise-sensitive applications.

Is Pin 3 (NC) electrically connected internally?

No-Pin 3 is a true no-connect terminal with no internal bond wire or silicon connection. The datasheet states it must be left unconnected or tied to the anode (Pin 1) solely for mechanical robustness during board assembly; it carries no electrical function.

How does thermal hysteresis impact calibration stability?

Thermal hysteresis is measured at 120 ppm-meaning voltage measured at 25 °C after cycling to –40 °C differs from that measured at 25 °C after cycling to +85 °C by up to 147 µV. This is critical for field-deployed instruments requiring recalibration-free operation over seasonal temperature swings.

TS4061AICT-1.225 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: SC-70, SOT-323

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-323

TS4061AICT-1.225 FAQ

1.How can I place an order for TS4061AICT-1.225 through Aetrix?

Please submit a Request for Quotation (RFQ) for TS4061AICT-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 TS4061AICT-1.225 reliable?

The price and inventory of TS4061AICT-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 TS4061AICT-1.225 is usually 5 days.

3.What payment methods are accepted for TS4061AICT-1.225?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS4061AICT-1.225 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS4061AICT-1.225?

TS4061AICT-1.225 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS4061AICT-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 TS4061AICT-1.225?

For technical support, including TS4061AICT-1.225 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS4061AICT-1.225 requirements.

6.How does Aetrix verify that TS4061AICT-1.225 is sourced from the original manufacturer or authorized distributors?

All TS4061AICT-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 TS4061AICT-1.225 meets industry standards.

7.What is the process for return or replacement of TS4061AICT-1.225?

All TS4061AICT-1.225 units undergo pre-shipment inspection (PSI). If there is an issue with TS4061AICT-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 TS4061AICT-1.225 part is unused and in its original packaging.

Return procedure for TS4061AICT-1.225:

1.Submit a request within 90 days.

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

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