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 TS4040EIZ-2.5

Name: TS4040EIZ-2.5
Brand: STMicroelectronics
SKU: TS4040EIZ-2.5
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: TS4040EIZ-2.5

Manufacturer:: STMicroelectronics

Category:: Voltage Reference

Package:: TO-226-3, TO-92-3 (TO-226AA)

Datasheet:: TS4040EIZ-2.5.pdf

Description:: IC VREF SHUNT 2% TO92-3

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,667

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

Product details

Overview

TS4040EIZ-2.5 from STMicroelectronics is a 2.5V ultra-low-power shunt voltage reference in TO-92 package, delivering ±2% initial accuracy at 25°C, 150 ppm/°C max tempco, and 40 µA typical operating current. It operates across -40°C to +85°C and maintains stability with capacitive loads up to 100 µF - used in precision battery monitoring circuits within portable instrumentation.

For engineers reviewing the TS4040EIZ-2.5 datasheet, TS4040EIZ-2.5 pinout, TS4040EIZ-2.5 application, or TS4040EIZ-2.5 equivalent, key selection criteria include minimum cathode current (60 µA), reverse static impedance (<1.2 Ω), long-term stability (120 ppm/1000 hrs), and noise performance (35 µV_rms, 10 Hz–10 kHz).

Technical Context

The TS4040EIZ-2.5 functions as a two-terminal shunt reference, sinking current to regulate voltage at its cathode. Its operation requires an external series resistor to set cathode current between 60 µA and 15 mA, with stable output maintained even under varying load capacitance (0–100 µF) and temperature extremes.

It achieves ±2% tolerance over industrial temperature range via curvature-compensated bandgap design, with low dynamic impedance (0.2–1.2 Ω) ensuring minimal voltage shift under current transients. The device exhibits 35 µV_rms wideband noise and 120 ppm long-term drift after 1000 hours at 100 µA bias.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	2.5 V ±2% at 25°C; defines precise reference point for ADCs, comparators, and battery gauges
Initial Accuracy	±2% over -40°C to +85°C; ensures system-level calibration validity without per-unit trimming
Tempco	≤150 ppm/°C; limits voltage drift to ±0.3125 mV/°C across full temperature range
Quiescent Current	40 µA typical; enables multi-year operation from coin-cell batteries in always-on sensors
Min Operating Current	60 µA at 25°C; sets lowest usable bias for stable regulation in ultra-low-power sleep modes
Reverse Static Impedance	0.4–1.2 Ω (Ik = Ikmin to 1 mA); minimizes load-induced voltage error in high-precision feedback paths
Noise (10 Hz–10 kHz)	35 µV_rms; supports 12-bit+ resolution in low-speed data acquisition without external filtering

Pinout & Package

TS4040EIZ-2.5 uses a 3-pin TO-92 plastic package with standard lead configuration: Pin 1 = Anode (GND), Pin 2 = Cathode (V_REF), Pin 3 = NC (not connected). The package is through-hole compatible and rated for 625 mW power dissipation at 25°C ambient.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Anode)	Ground reference terminal	Must be connected directly to system ground plane to minimize noise coupling and ensure stable regulation
Pin 2 (Cathode)	Regulated 2.5V output node	Sinks current from external resistor; voltage at this pin is the precision reference for downstream circuitry
Pin 3 (NC)	No connection	Internally unconnected; must remain floating or grounded per layout best practices to avoid parasitic coupling

Key Features

Feature	Design Value
Ultra-low operating current	40 µA typical enables >10-year battery life in maintenance-free IoT sensor nodes
Capacitive load stability	Stable with 0–100 µF output capacitance eliminates need for external isolation resistors
Industrial temperature range	-40°C to +85°C operation supports deployment in outdoor metering and factory-floor equipment
Low dynamic impedance	Sub-1.2 Ω impedance reduces sensitivity to supply ripple and transient load steps
Low wideband noise	35 µV_rms noise floor allows direct interface with 12-bit SAR ADCs without post-filtering

Applications

Battery-Powered Instrumentation

Switch-Mode Power Supply Feedback

Use Scenario: Handheld multimeter using single AA cell with 12-bit ADC for voltage measurement.

IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5V reference for ADC internal conversion and analog front-end scaling.

Use Value: Enables ±0.5% full-scale accuracy over battery discharge curve (0.9–1.5 V input) without recalibration.

Use Scenario: Isolated flyback converter with optocoupler-based feedback loop.

IC Role / Device Role / Timing Role: Precision voltage reference setting feedback threshold for TL431-like control architecture.

Use Value: Maintains ±1.5% output regulation across line/load/temperature variations due to low tempco and high PSRR.

Portable Battery Charger Monitoring

Industrial Data Acquisition Node

Use Scenario: USB-C PD charger IC monitoring Li-ion cell voltage during CC/CV charging phase.

IC Role / Device Role / Timing Role: Reference for comparator detecting 4.2V termination threshold with hysteresis.

Use Value: Guarantees charge cutoff within ±10 mV across -10°C to +60°C ambient, preventing overcharge.

Use Scenario: DIN-rail mounted temperature transmitter with 4–20 mA output and HART interface.

IC Role / Device Role / Timing Role: Stable reference for DAC generating precise current loop setpoint and internal ADC calibration.

Use Value: Achieves 0.1% total unadjusted error over 15-year field life, meeting IEC 61290 compliance.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TL431ACDBZR	2.5V adjustable shunt, ±1% initial accuracy, 90 ppm/°C tempco, 70 µA min cathode current	Requires two external resistors for fixed 2.5V; higher quiescent current limits ultra-low-power use	Preferred when tighter initial tolerance and lower tempco are required, and board space allows resistor network
LM4040C25IDBZR	2.5V shunt, ±0.5% initial accuracy, 100 ppm/°C tempco, 60 µA min cathode current, SOT-23-3 package	Smaller footprint but higher cost; not TO-92 compatible for legacy through-hole designs	Select when upgrading to surface-mount assembly and requiring improved accuracy without changing reference topology

Compared with TL431ACDBZR and LM4040C25IDBZR, TS4040EIZ-2.5 offers the lowest quiescent current (40 µA) and TO-92 compatibility for cost-sensitive through-hole systems, trading off initial accuracy for extended battery life and simplified layout.

Availability

TS4040EIZ-2.5 is available at Aetrix Electronics and suitable for battery-operated equipment, instrumentation, and switch-mode power supply feedback circuits requiring stable component supply with long lifecycle visibility.

Supply support for TS4040EIZ-2.5 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, designing and manufacturing microcontrollers, power management ICs, sensors, and analog components for industrial, automotive, and consumer markets.

The TS4040 series belongs to ST's precision analog reference product line, engineered specifically for space-constrained, ultra-low-power applications where stable voltage references are critical for measurement integrity and energy efficiency.

FAQ

What is the minimum cathode current required for regulation?

The TS4040EIZ-2.5 requires a minimum cathode current of 60 µA at 25°C to maintain regulation within specification. At temperature extremes (-40°C or +85°C), this increases to 70 µA. Below this threshold, output voltage deviates beyond ±2% tolerance and dynamic impedance rises significantly.

Can TS4040EIZ-2.5 drive a 10 µF ceramic capacitor directly?

Yes - the TS4040EIZ-2.5 is explicitly characterized for stability with capacitive loads up to 100 µF, including ceramic, tantalum, and electrolytic types. No series isolation resistor is needed, unlike many competing shunt references that oscillate or exhibit overshoot with >100 nF loads.

How does long-term stability impact calibration intervals?

With 120 ppm drift over 1000 hours at 100 µA bias, TS4040EIZ-2.5 contributes less than 0.03% error after one year of continuous operation. This enables annual calibration cycles in portable test equipment instead of quarterly, reducing maintenance overhead and downtime.

Is the TO-92 package RoHS-compliant and lead-free?

Yes - TS4040EIZ-2.5 is manufactured in a RoHS-compliant, lead-free TO-92 package per STMicroelectronics' qualified process. The device meets JEDEC J-STD-020 moisture sensitivity level (MSL) 1 and supports standard SnPb and lead-free reflow profiles, including peak temperatures up to 260°C for 10 seconds.

TS4040EIZ-2.5 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: TO-226-3, TO-92-3 (TO-226AA)

Series:: -

Packaging:: Bulk

Product Status:: Obsolete

Reference Type:: Shunt

Output Type:: Fixed

Voltage - Output (Min/Fixed):: 2.5V

Voltage - Output (Max):: -

Current - Output:: 15 mA

Tolerance:: ±2%

Temperature Coefficient:: 150ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: -

Voltage - Input:: -

Current - Supply:: -

Current - Cathode:: 70 µA

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

TS4040EIZ-2.5 FAQ

1.How can I place an order for TS4040EIZ-2.5 through Aetrix?

Please submit a Request for Quotation (RFQ) for TS4040EIZ-2.5 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 TS4040EIZ-2.5 reliable?

The price and inventory of TS4040EIZ-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS4040EIZ-2.5 is usually 5 days.

3.What payment methods are accepted for TS4040EIZ-2.5?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS4040EIZ-2.5 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS4040EIZ-2.5?

TS4040EIZ-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS4040EIZ-2.5 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 TS4040EIZ-2.5?

For technical support, including TS4040EIZ-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS4040EIZ-2.5 requirements.

6.How does Aetrix verify that TS4040EIZ-2.5 is sourced from the original manufacturer or authorized distributors?

All TS4040EIZ-2.5 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 TS4040EIZ-2.5 meets industry standards.

7.What is the process for return or replacement of TS4040EIZ-2.5?

All TS4040EIZ-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with TS4040EIZ-2.5, 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 TS4040EIZ-2.5 part is unused and in its original packaging.

Return procedure for TS4040EIZ-2.5:

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…