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

Diodes Incorporated ZXRE1004ERSTOB

Name: ZXRE1004ERSTOB
Brand: Diodes Incorporated
SKU: ZXRE1004ERSTOB
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZXRE1004ERSTOB

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: E-Line-3

Datasheet:: ZXRE1004ERSTOB.pdf

Description:: IC VREF SHUNT 2% E-LINE

Quantity:: RFQ Add To RFQ list

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Inventory:1,234

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Product details

Overview

ZXRE1004ERSTOB from Diodes Incorporated is a micropower (4 µA typical knee current), 1.22 V bandgap voltage reference in SOT23 package, with 1% initial tolerance and 20 ppm/°C typical temperature coefficient. It operates over 8 µA–20 mA supply current and maintains stability with capacitive loads-ideal for precision low-power analog signal conditioning in portable instrumentation and battery-powered data acquisition systems.

For engineers reviewing the ZXRE1004ERSTOB datasheet, ZXRE1004ERSTOB pinout, ZXRE1004ERSTOB application, or ZXRE1004ERSTOB equivalent, key selection criteria include ultra-low quiescent current, tight thermal drift, unconditionally stable operation with capacitive loads, and compatibility with legacy reference footprints including REF1004 and LM385.

Technical Context

The ZXRE1004ERSTOB implements a two-terminal shunt-mode bandgap reference topology, requiring an external current source and operating as a precision voltage sink. Its design achieves 1.22 V output via curvature-corrected bandgap core, delivering stable regulation across 8 µA to 20 mA load current range without external compensation.

It exhibits unconditionally stable behavior up to ≥1 µF capacitive load due to internal compensation, and its 20 ppm/°C typical TC is derived from matched transistor pair thermal gradients and resistor ratio trimming-verified over −40°C to +85°C ambient.

Key Specifications

Parameter	Value and Actual Design Meaning
Reference Voltage	1.22 V nominal; ±1% initial tolerance ensures ≤12.2 mV absolute error at 25°C for calibration-critical circuits.
Knee Current	4 µA typical; enables operation from microamp-level bias sources, extending battery life in always-on sensor nodes.
Temp Coefficient	20 ppm/°C typical; contributes ≤1.7 mV drift over −40°C to +85°C, supporting 12-bit ADC accuracy without software correction.
Operating Current	8 µA to 20 mA; supports wide dynamic range-from ultra-low-power sleep modes to high-precision active measurement phases.
Dynamic Impedance	0.2 Ω typical at 1 mA; minimizes load-induced voltage shift during fast-sampling ADC conversions.
Noise (10Hz–10kHz)	60 µV_rms; limits quantization uncertainty in 16-bit SAR ADC front-ends without additional filtering.

Pinout & Package

SOT23-3 package (JEDEC TO-236AB), 2.80 × 2.64 × 1.12 mm body, surface-mount, lead-free and RoHS compliant.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Current input terminal	Accepts regulated bias current; must be driven by high-impedance current source or series resistor from higher voltage rail.
Cathode (Pin 2)	Reference output node	Provides stable 1.22 V relative to Anode; connects to load and feedback networks of precision analog stages.
NC / Floating (Pin 3)	No-connect terminal	Internally unconnected; left floating per datasheet-no tie to Anode or Cathode required for SOT23 variant.

Key Features

Feature	Design Value
Unconditionally stable	Operates without oscillation into ≥1 µF capacitive load-eliminates need for external series resistance in ADC reference buffers.
Microamp knee current	4 µA typical start-up current enables direct use with nanoamp LDOs or high-value bias resistors in energy-harvesting systems.
Low dynamic impedance	0.2 Ω at 1 mA ensures <1 µV/mA load regulation error-critical for multi-channel simultaneous-sampling data acquisition.
Wide operating current range	8 µA–20 mA span allows single BOM part to serve both ultra-low-power standby and full-accuracy active modes.

Applications

Battery-Powered Sensor Nodes

Precision Data Acquisition Systems

Use Scenario: Long-life wireless environmental sensors powered by coin-cell batteries with 10+ year target lifetime.

IC Role / Device Role / Timing Role: Shunt voltage reference providing excitation and ADC reference for low-noise op-amp signal chains.

Use Value: 4 µA knee current and 20 ppm/°C TC enable sub-0.1% total system error over temperature and battery discharge without recalibration.

Use Scenario: Industrial 16-bit isolated DAQ modules measuring thermocouples and strain gauges in factory automation.

IC Role / Device Role / Timing Role: Primary reference for dual-slope and sigma-delta ADCs, sharing common ground with isolated power supplies.

Use Value: 0.2 Ω dynamic impedance and 60 µV_rms noise ensure ≤½ LSB error in 16-bit conversion without post-processing.

Portable Medical Instrumentation

Calibration-Grade Test Equipment

Use Scenario: Handheld ECG analyzers requiring FDA-grade accuracy and 72-hour runtime on lithium-polymer cells.

IC Role / Device Role / Timing Role: Reference source for programmable gain instrumentation amplifiers and anti-aliasing filter biasing.

Use Value: 1% initial tolerance and <1.7 mV TC drift over medical operating range meet IEC 60601-2-27 linearity requirements.

Use Scenario: Benchtop multimeters and calibrators needing traceable 1.22 V reference for self-test and auto-zero functions.

IC Role / Device Role / Timing Role: Stable, low-drift reference for internal DAC-based voltage generation and comparator thresholds.

Use Value: Unconditional stability with 10 µF bulk capacitance eliminates reference bounce during relay-switched range changes.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
REF1004CMX	Same 1.22 V, 4 µA knee, but 0.1% initial tolerance and 25 ppm/°C TC; SO-8 package.	Higher precision and larger footprint; requires PCB redesign and adds cost.	Select only when 0.1% absolute accuracy is mandatory and space permits SO-8 layout.
LM385BZ-1.2	1.235 V nominal, 10 µA knee, 50 ppm/°C TC, TO-92 package; no SOT23 option.	Looser tolerance and higher drift; incompatible pinout and thermal performance in SMT designs.	Consider only for through-hole prototyping or legacy board rework where SOT23 is unavailable.

Compared with REF1004CMX and LM385BZ-1.2, the ZXRE1004ERSTOB delivers optimal balance of SMT compatibility, micropower operation, and 1% accuracy-making it the preferred choice for new compact, battery-sensitive designs where 0.1% is unnecessary.

Availability

ZXRE1004ERSTOB is available at Aetrix Electronics and suitable for battery-powered sensor nodes, precision data acquisition systems, and portable medical instrumentation requiring stable component supply with consistent parametric performance across production lots.

Supply support for ZXRE1004ERSTOB 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, energy-efficient components for industrial, computing, and consumer markets.

The ZXRE1004 belongs to Diodes' precision voltage reference product line, engineered specifically for ultra-low-power, high-stability analog subsystems in space-constrained portable electronics.

FAQ

What is the minimum operating current for stable regulation?

The ZXRE1004ERSTOB achieves stable regulation starting at 4 µA typical knee current, with guaranteed operation down to 8 µA across −40°C to +85°C. Below 8 µA, output voltage may deviate beyond 1% tolerance, especially at temperature extremes.

Can it drive a 100 nF capacitor directly without oscillation?

Yes-the ZXRE1004ERSTOB is unconditionally stable and has been characterized to remain non-oscillatory with capacitive loads up to at least 1 µF. A 100 nF capacitor introduces no phase margin degradation and improves high-frequency noise rejection in ADC reference paths.

Is the SOT23-3 pinout compatible with REF1004 in the same footprint?

No-REF1004 uses an SO-8 package with different pin assignment and electrical interface (three-terminal series mode). ZXRE1004ERSTOB is a two-terminal shunt device in SOT23; it replaces REF1004 only functionally, not pin-for-pin, and requires circuit redesign to accommodate shunt topology.

Does this part meet AEC-Q200 for automotive use?

No-ZXRE1004ERSTOB is not qualified to AEC-Q200. Diodes offers automotive-grade alternatives (e.g., AZR431 series) with IATF 16949 manufacturing and PPAP support; contact Diodes marketing for qualified replacements if automotive qualification is required.

ZXRE1004ERSTOB Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Package/Case:: E-Line-3

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Reference Type:: Shunt

Output Type:: Fixed

Voltage - Output (Min/Fixed):: 1.22V

Voltage - Output (Max):: -

Current - Output:: 20 mA

Tolerance:: ±2%

Temperature Coefficient:: 75ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: 60µVrms

Voltage - Input:: -

Current - Supply:: -

Current - Cathode:: 8 µA

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: E-Line (TO-92 compatible)

ZXRE1004ERSTOB FAQ

1.How can I place an order for ZXRE1004ERSTOB through Aetrix?

Please submit a Request for Quotation (RFQ) for ZXRE1004ERSTOB 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 ZXRE1004ERSTOB reliable?

The price and inventory of ZXRE1004ERSTOB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE1004ERSTOB is usually 5 days.

3.What payment methods are accepted for ZXRE1004ERSTOB?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE1004ERSTOB transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZXRE1004ERSTOB?

ZXRE1004ERSTOB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZXRE1004ERSTOB 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 ZXRE1004ERSTOB?

For technical support, including ZXRE1004ERSTOB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE1004ERSTOB requirements.

6.How does Aetrix verify that ZXRE1004ERSTOB is sourced from the original manufacturer or authorized distributors?

All ZXRE1004ERSTOB 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 ZXRE1004ERSTOB meets industry standards.

7.What is the process for return or replacement of ZXRE1004ERSTOB?

All ZXRE1004ERSTOB units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE1004ERSTOB, 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 ZXRE1004ERSTOB part is unused and in its original packaging.

Return procedure for ZXRE1004ERSTOB:

1.Submit a request within 90 days.

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

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