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

STMicroelectronics TS4040DIZ-2.5

Name: TS4040DIZ-2.5
Brand: STMicroelectronics
SKU: TS4040DIZ-2.5
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TS4040DIZ-2.5

Manufacturer:: STMicroelectronics

Category:: Voltage Reference

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

Datasheet:: TS4040DIZ-2.5.pdf

Description:: IC VREF SHUNT 1% TO92-3

Quantity:: RFQ Add To RFQ list

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Inventory:2,627

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Product details

Overview

TS4040DIZ-2.5 from STMicroelectronics is a 1% precision, 2.5V micropower shunt voltage reference in TO92 plastic package, operating from -40°C to +85°C with 150 ppm/°C max tempco, 40 µA typical current consumption, and 0.4–1.2 Ω static impedance across temperature - used for feedback regulation in battery-powered SMPS and portable instrumentation.

For engineers reviewing the TS4040DIZ-2.5 datasheet, TS4040DIZ-2.5 pinout, TS4040DIZ-2.5 application, or TS4040DIZ-2.5 equivalent, key selection criteria include initial accuracy at 25°C (±1%), long-term stability (120 ppm over 1000 hrs), low-noise performance (35 µV_rms, 10 Hz–10 kHz), and capacitive load stability up to 100 µF.

Technical Context

The TS4040DIZ-2.5 functions as a two-terminal shunt reference, sinking cathode current to maintain a precise 2.5 V output across its anode-cathode terminals. It operates with a minimum cathode current of 70 µA over full temperature range and supports up to 15 mA maximum, delivering stable regulation without requiring external bias resistors beyond basic current-setting networks.

Its low 40 µA typical quiescent current and 0.2–0.7 Ω dynamic impedance at Ik ≥ 1 mA enable high-efficiency, low-drift operation in space-constrained, battery-sensitive designs. The device exhibits monotonic voltage vs. temperature behavior and maintains ±1% tolerance over industrial temperature range without trimming.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	2.5 V ±1% at 25°C; ensures accurate feedback setpoint for 3.3 V or 5 V rail regulation
Tempco	≤150 ppm/°C; limits output drift to ±0.375 mV/°C over -40°C to +85°C
Quiescent Current	40 µA typical; enables >10-year battery life in always-on sensor nodes drawing <100 µA
Static Impedance	0.4–1.2 Ω (Ik = Ikmin to 1 mA); minimizes load-induced voltage error in high-gain feedback loops
Noise (10 Hz–10 kHz)	35 µV_rms; avoids signal corruption in precision ADC references or analog front-ends
Long-Term Stability	120 ppm over 1000 hrs; reduces calibration frequency in field-deployed test equipment

Pinout & Package

TS4040DIZ-2.5 uses a 3-pin TO92 plastic package with standard anode-cathode-reference terminal configuration. Pin 1 (Anode) connects to ground or low-impedance return; Pin 2 (Cathode) sinks regulated current; Pin 3 (NC) is not connected and must remain floating.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Anode)	Reference ground node	Low-impedance return path; must be tied directly to system ground plane to avoid noise coupling
Pin 2 (Cathode)	Current-sinking output	Sinks adjustable cathode current to maintain 2.5 V; requires series resistor from supply to set operating point
Pin 3 (NC)	No connection	Internally unconnected; must be left unconnected and not tied to any net to prevent parasitic leakage

Key Features

Feature	Design Value
1% Initial Accuracy	Guarantees ≤25 mV absolute error at 25°C, eliminating need for post-assembly trimming in cost-sensitive consumer power supplies
Capacitive Load Stability	Maintains regulation with up to 100 µF output capacitance - simplifies EMI filtering without oscillation risk
Ultra-Low Operating Current	40 µA typical sink current enables use in energy-harvesting systems where supply current is limited to <100 µA
Industrial Temperature Range	Validated operation from -40°C to +85°C supports deployment in automotive cabin electronics and outdoor industrial sensors

Applications

Battery-Powered Instrumentation

Switch-Mode Power Supply Feedback

Use Scenario: Portable multimeter using single-cell Li-ion supply (2.7–4.2 V) with 16-bit SAR ADC.

IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5 V reference for ADC internal gain stage and offset calibration.

Use Value: ±1% accuracy and 35 µV_rms noise ensure <0.01% measurement linearity without external op-amp buffering.

Use Scenario: Isolated flyback converter for IoT gateway, regulating 3.3 V output from 12 V input.

IC Role / Device Role / Timing Role: Secondary-side shunt reference feeding optocoupler feedback network to control primary-side PWM controller.

Use Value: 150 ppm/°C tempco and 0.4–1.2 Ω impedance minimize output voltage drift across ambient temperature swings.

USB-C Power Delivery Monitor

Wireless Sensor Node Reference

Use Scenario: USB-C PD sink detecting VBUS level (5–20 V) via resistive divider into microcontroller ADC.

IC Role / Device Role / Timing Role: Precision 2.5 V reference for ADC reference rail, enabling accurate VBUS measurement independent of supply variation.

Use Value: 120 ppm long-term stability prevents recalibration drift during 5-year product lifecycle in field deployments.

Use Scenario: LoRaWAN soil moisture sensor powered by CR2032 coin cell, sampling every 15 minutes.

IC Role / Device Role / Timing Role: Low-current shunt reference supplying reference voltage to analog front-end and ADC during active measurement burst.

Use Value: 40 µA typical current draw extends battery life beyond 3 years while maintaining ±1% measurement fidelity.

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	2.5 V, ±1%, but requires ≥1 mA min cathode current and has higher 22 µA typical bias current	Not suitable for sub-100 µA systems; better for higher-current SMPS with tighter dynamic response needs	Select when higher sink current capability (>100 mA) and faster transient response are required
REF3025AIDBZR	2.5 V, ±0.2%, but is a series reference requiring ≥50 µA supply current and 1.8 V min input	Requires dedicated LDO or higher input voltage; unsuitable for direct shunt replacement in existing TO92 footprints	Select only when ultra-high accuracy (<±0.2%) justifies redesign and added BOM cost

Compared with TL431ACDBZR and REF3025AIDBZR, TS4040DIZ-2.5 uniquely balances 1% accuracy, TO92 compatibility, and 40 µA operation - making it optimal for legacy-replacement, battery-limited, and footprint-constrained shunt reference roles without circuit rework.

Availability

TS4040DIZ-2.5 is available at Aetrix Electronics and suitable for battery-operated equipment, switch-mode power supplies, and portable instrumentation requiring stable component supply with guaranteed industrial temperature performance and long-term calibration integrity.

Supply support for TS4040DIZ-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 analog, MCU, power, and sensing solutions for industrial, automotive, and consumer markets.

The TS4040 series belongs to ST's precision analog reference portfolio, engineered specifically for low-power, high-stability shunt regulation in space- and energy-constrained applications where TO92 form factor and micropower operation are mandatory.

FAQ

What is the minimum cathode current required for regulation across temperature?

The TS4040DIZ-2.5 requires a minimum cathode current of 70 µA over the full -40°C to +85°C range to maintain regulation within ±1% tolerance. At 25°C, the minimum is lower (40 µA typ., 65 µA max), but design must ensure ≥70 µA under worst-case cold conditions to guarantee specification compliance.

Can TS4040DIZ-2.5 drive a 10 µF ceramic capacitor directly at the cathode?

Yes - the TS4040DIZ-2.5 is explicitly characterized for stability with capacitive loads up to 100 µF, including ceramic types. Its low output impedance (≤1.2 Ω) and internal compensation eliminate need for series resistance or external isolation, enabling direct connection for EMI filtering in SMPS feedback paths.

How does long-term stability impact calibration intervals in test equipment?

With 120 ppm drift over 1000 hours (≈6 weeks continuous operation), TS4040DIZ-2.5 contributes <0.03% total error after one year of intermittent use. This allows annual calibration cycles in portable DMMs and data loggers, reducing maintenance cost versus references with >500 ppm/year drift.

Is the TO92 package RoHS-compliant and lead-free?

Yes - TS4040DIZ-2.5 is manufactured in STMicroelectronics' RoHS-compliant, lead-free TO92 package per EU Directive 2011/65/EU. The device carries the "E" suffix per ST's marking convention for lead-free products and meets JEDEC J-STD-020 moisture sensitivity level MSL3.

TS4040DIZ-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:: ±1%

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

TS4040DIZ-2.5 FAQ

1.How can I place an order for TS4040DIZ-2.5 through Aetrix?

Please submit a Request for Quotation (RFQ) for TS4040DIZ-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 TS4040DIZ-2.5 reliable?

The price and inventory of TS4040DIZ-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 TS4040DIZ-2.5 is usually 5 days.

3.What payment methods are accepted for TS4040DIZ-2.5?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS4040DIZ-2.5 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS4040DIZ-2.5?

TS4040DIZ-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS4040DIZ-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 TS4040DIZ-2.5?

For technical support, including TS4040DIZ-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS4040DIZ-2.5 requirements.

6.How does Aetrix verify that TS4040DIZ-2.5 is sourced from the original manufacturer or authorized distributors?

All TS4040DIZ-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 TS4040DIZ-2.5 meets industry standards.

7.What is the process for return or replacement of TS4040DIZ-2.5?

All TS4040DIZ-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with TS4040DIZ-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 TS4040DIZ-2.5 part is unused and in its original packaging.

Return procedure for TS4040DIZ-2.5:

1.Submit a request within 90 days.

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

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