Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

STMicroelectronics TS4061BICT-1.25

Name: TS4061BICT-1.25
Brand: STMicroelectronics
SKU: TS4061BICT-1.25
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: TS4061BICT-1.25

Manufacturer:: STMicroelectronics

Category:: Voltage Reference

Package:: SC-70, SOT-323

Datasheet:: TS4061BICT-1.25.pdf

Description:: IC VREF SHUNT 0.2% SOT323-3

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:10,815

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

TS4061BICT-1.25 from STMicroelectronics is a precision micropower shunt voltage reference delivering a fixed 1.25 V output with ±0.2% initial accuracy at 25 °C, ultra-low 10 µA operating current, 35 ppm/°C max temperature coefficient, and 10 µV_p-p low-frequency noise-used in high-resolution ADC biasing and portable sensor signal conditioning.

For engineers reviewing the TS4061BICT-1.25 datasheet, TS4061BICT-1.25 pinout, TS4061BICT-1.25 application, or TS4061BICT-1.25 equivalent, key selection criteria include shunt reference stability under capacitive loads, thermal hysteresis (120 ppm), static impedance (0.15–0.3 Ω), minimum regulation current (12 µA over full temperature range), and SOT323-3L footprint compatibility.

Technical Context

The TS4061BICT-1.25 operates as a two-terminal shunt reference, sinking current to maintain a precise 1.25 V cathode-to-anode voltage across its terminals. It achieves regulation without external bias components and remains stable with capacitive loads up to 100 nF, eliminating need for series resistance compensation.

Its bandgap-derived core delivers 20–35 ppm/°C average temperature coefficient and exhibits low thermal hysteresis (120 ppm) due to monolithic silicon construction. The device draws only 10 µA at 25 °C and supports operation from 7.5 µA (25 °C) to 12 µA (-40 to +85 °C) minimum current.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.25 V; enables direct replacement of 1.25 V references in DAC/ADC reference chains without resistor scaling.
Initial Accuracy	±0.2% at 25 °C (TS4061B grade); ensures ≤12.5 mV absolute error in 12-bit systems at room temperature.
Temp Coefficient	Max 35 ppm/°C; contributes ≤3.5 mV drift over -40 to +85 °C industrial range, critical for uncalibrated instrumentation.
Operating Current	10 µA typical at 25 °C; allows >10-year battery life in coin-cell-powered data loggers drawing <1 µA average system current.
Low-Freq Noise	10 µV_p-p (0.1–10 Hz); supports 16-bit+ resolution in precision weigh scales and strain-gauge bridges.
Static Impedance	0.15–0.3 Ω; minimizes load-induced voltage shift in varying-current applications like multiplexed sensor arrays.
Thermal Hysteresis	120 ppm; limits repeatability error after thermal cycling-essential for field-deployed calibration equipment.

Pinout & Package

TS4061BICT-1.25 is housed in a 3-pin SOT323-3L package (1.8 × 1.35 mm, 0.65 mm pitch), optimized for space-constrained PCBs. Pin 1 = Anode, Pin 2 = Cathode, Pin 3 = NC (No Connect; must be left floating or tied to anode per datasheet).

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Reference ground return path	Sinks current from external bias resistor; connects to system GND or low-impedance node to minimize IR drop errors.
Cathode (Pin 2)	Stable 1.25 V output node	Provides regulated voltage to ADC REF+, op-amp reference inputs, or DAC bias networks; requires local 100 nF decoupling.
NC (Pin 3)	Unused terminal	Must remain unconnected or tied to anode; no internal connection-incorrect routing causes assembly defects or measurement offsets.

Key Features

Feature	Design Value
Capacitive Load Stability	Operates stably with ≥100 nF ceramic output capacitance-eliminates need for series damping resistors in noisy environments.
Micropower Operation	10 µA typical quiescent current enables use in energy-harvesting nodes where supply current budget is <15 µA.
Industrial Temp Range	Guaranteed performance from -40 to +85 °C without derating-supports deployment in outdoor metering and automotive cabin sensors.
Low Thermal Hysteresis	120 ppm voltage shift after -40/+85 °C cycling-preserves calibration integrity in field-replaceable modules.
ECOPACK® Compliance	Meets RoHS and halogen-free requirements per ST's ECOPACK2 standard-qualified for consumer and industrial green procurement programs.

Applications

Portable Medical Sensors

Data Acquisition Front-Ends

Use Scenario: Battery-powered ECG patch measuring microvolt-level cardiac signals with 24-bit delta-sigma ADC.

IC Role / Device Role / Timing Role: Shunt reference providing stable 1.25 V reference for ADC and analog front-end op-amps.

Use Value: 10 µV_p-p low-frequency noise prevents baseline wander; 10 µA current extends 5-year battery life.

Use Scenario: 16-channel industrial DAQ module sampling thermocouples and RTDs across -40 to +85 °C ambient.

IC Role / Device Role / Timing Role: Precision voltage reference for multiplexed PGA and sigma-delta converter reference input.

Use Value: 35 ppm/°C tempco ensures <±2 LSB error over full temperature range without software calibration.

Smart Meter Reference Subsystem

Calibration Equipment

Use Scenario: Revenue-grade electricity meter requiring metrology-grade voltage reference for anti-tampering ADCs.

IC Role / Device Role / Timing Role: Primary shunt reference for isolated metrology ADC and on-chip calibration DAC.

Use Value: 120 ppm thermal hysteresis meets IEC 62053-21 Class 0.2 long-term repeatability requirements.

Use Scenario: Handheld multimeter calibrator generating traceable 1.25 V outputs for benchtop DMM verification.

IC Role / Device Role / Timing Role: Stable, low-drift reference source in portable calibration head with auto-ranging output buffers.

Use Value: ±0.2% initial accuracy and 0.3 Ω static impedance enable <0.01% linearity error in buffered reference outputs.

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 (2.495 V min), ±0.5% initial accuracy, 80 µA typical I_q, SOT23-5	Requires external resistor divider; higher current increases power in ultra-low-power designs	Select when adjustable output or higher voltage (>1.25 V) is required; avoid for fixed 1.25 V micropower use.
REF3012AIDBZR	Series reference, 1.2 V output, ±0.2% accuracy, 50 µA I_q, SOT23-3	Three-terminal architecture requires separate input/output pins; less tolerant of capacitive loading	Choose for low-noise series topology where input voltage margin permits; not suitable as direct shunt drop-in.

Compared with TLVH431ACDBVR and REF3012AIDBZR, TS4061BICT-1.25 uniquely combines fixed 1.25 V, 10 µA operation, and shunt topology in SOT323-3L-making it optimal for space- and power-constrained 1.25 V reference needs where simplicity and minimal board area are critical.

Availability

TS4061BICT-1.25 is available at Aetrix Electronics and suitable for portable medical sensors, smart meter reference subsystems, and calibration equipment requiring stable component supply with guaranteed long-term availability.

Supply support for TS4061BICT-1.25 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 products for automotive, industrial, and power management applications.

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

FAQ

What is the minimum operating current for TS4061BICT-1.25 across its full temperature range?

The TS4061BICT-1.25 requires a minimum operating current of 12 µA over the full -40 to +85 °C industrial temperature range to maintain regulation. At 25 °C, the minimum is 7.5 µA, but design must ensure ≥12 µA under worst-case thermal conditions to guarantee 1.25 V output stability and specified accuracy.

Can TS4061BICT-1.25 drive a 100 nF capacitor directly without oscillation?

Yes-the TS4061BICT-1.25 is explicitly characterized for stable operation with up to 100 nF capacitive loads, as confirmed in Figure 9 of the datasheet. No series resistor or isolation is required, enabling direct decoupling at the reference node for noise-sensitive ADC applications.

Is Pin 3 (NC) electrically connected internally?

No-Pin 3 is a true no-connect terminal with no internal silicon connection. The datasheet states it "must be left unconnected or connected to anode"; tying it to anode is permissible for mechanical reinforcement but provides no electrical benefit and must not be tied to any other potential.

How does thermal hysteresis impact calibration retention in field-deployed devices?

Thermal hysteresis of 120 ppm means the output voltage may shift by up to 150 µV after cycling between -40 °C and +85 °C and returning to 25 °C. This affects zero-point repeatability in portable calibration tools and must be accounted for in NIST-traceable instrument specifications where multi-cycle stability is mandated.

TS4061BICT-1.25 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):: 1.25V

Voltage - Output (Max):: -

Current - Output:: 15 mA

Tolerance:: ±0.2%

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-323-3

TS4061BICT-1.25 FAQ

1.How can I place an order for TS4061BICT-1.25 through Aetrix?

Please submit a Request for Quotation (RFQ) for TS4061BICT-1.25 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 TS4061BICT-1.25 reliable?

The price and inventory of TS4061BICT-1.25 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS4061BICT-1.25 is usually 5 days.

3.What payment methods are accepted for TS4061BICT-1.25?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS4061BICT-1.25 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS4061BICT-1.25?

TS4061BICT-1.25 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS4061BICT-1.25 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 TS4061BICT-1.25?

For technical support, including TS4061BICT-1.25 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS4061BICT-1.25 requirements.

6.How does Aetrix verify that TS4061BICT-1.25 is sourced from the original manufacturer or authorized distributors?

All TS4061BICT-1.25 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 TS4061BICT-1.25 meets industry standards.

7.What is the process for return or replacement of TS4061BICT-1.25?

All TS4061BICT-1.25 units undergo pre-shipment inspection (PSI). If there is an issue with TS4061BICT-1.25, 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 TS4061BICT-1.25 part is unused and in its original packaging.

Return procedure for TS4061BICT-1.25:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…