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

Diodes Incorporated ZXRE1004FRSTZ

Name: ZXRE1004FRSTZ
Brand: Diodes Incorporated
SKU: ZXRE1004FRSTZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZXRE1004FRSTZ

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: E-Line-3

Datasheet:: ZXRE1004FRSTZ.pdf

Description:: IC VREF SHUNT 3% E-LINE

Quantity:: RFQ Add To RFQ list

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Inventory:2,473

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Product details

Overview

ZXRE1004FRSTZ from Diodes Incorporated is a 1.22 V bandgap voltage reference IC with 4 µA typical knee current, 20 ppm/°C typical temperature coefficient, and ±1% initial tolerance in SOT23 package-designed for ultra-low-power precision analog circuits in battery-powered instrumentation and portable data acquisition systems.

For engineers reviewing the ZXRE1004FRSTZ datasheet, ZXRE1004FRSTZ pinout, ZXRE1004FRSTZ application, or ZXRE1004FRSTZ equivalent, key selection criteria include microamp-level operating current, capacitive-load stability, tight thermal drift, and compatibility with legacy 1004-series references in space-constrained designs.

Technical Context

The ZXRE1004 operates as a two-terminal shunt reference, requiring an external current source to bias into regulation. It maintains stable 1.22 V output across 8 µA–20 mA supply current and exhibits unconditionally stable behavior with capacitive loads up to several hundred nanofarads.

Its bandgap core delivers low wideband noise (60 µV_rms, 10 Hz–10 kHz) and low dynamic impedance (0.2 Ω typical at 1 mA), enabling high-accuracy ADC/DAC reference and low-drift sensor excitation without external compensation.

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 12-bit system calibration.
Knee Current	4 µA typical; enables operation from microcontroller GPIO or ultra-low-I_Q LDOs in energy-harvesting nodes.
Tempco	20 ppm/°C typical; contributes ≤1.7 mV drift over –40°C to +85°C, supporting industrial-grade accuracy.
Operating Current Range	8 µA to 20 mA; supports both standby sensing (µA) and active conversion (mA) modes without re-biasing.
Dynamic Impedance	0.2 Ω typical at 1 mA; minimizes load-induced voltage shift during fast ADC sampling transients.
Wideband Noise	60 µV_rms (10 Hz–10 kHz); preserves ENOB in 16-bit SAR ADCs without external filtering.

Pinout & Package

SOT23-3 package (JEDEC TO-236AB), 2.80 × 2.64 × 1.12 mm body, gull-wing leads, RoHS-compliant matte tin lead finish.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Anode)	Current Sink Input	Accepts regulated bias current; connects to positive supply via series resistor or current source.
Pin 2 (Cathode)	Reference Output / Ground Reference	Provides stable 1.22 V relative to this node; must be tied to system ground or low-impedance return path.
Pin 3 (NC)	No Connect	Internally floating; no electrical connection-must remain unconnected per datasheet.

Key Features

Feature	Design Value
Ultra-low knee current	4 µA typical enables direct drive from nanoamp-output DACs or leakage-limited bias networks.
Unconditional stability	No external capacitor required for stability-even with 100 nF ceramic load-reducing BOM count and layout area.
Low dynamic impedance	0.2 Ω at 1 mA suppresses supply ripple coupling into reference output during digital switching events.
High tempco uniformity	20 ppm/°C typical across –40°C to +85°C avoids software temperature compensation in portable medical sensors.

Applications

Portable Data Loggers

Battery-Powered DMMs

Use Scenario: Continuous 24-hour environmental monitoring using coin-cell power and 16-bit sigma-delta ADC.

IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 1.22 V reference for ADC internal gain stage and sensor signal conditioning.

Use Value: 4 µA knee current extends battery life beyond 5 years; 20 ppm/°C tempco eliminates field recalibration.

Use Scenario: Handheld digital multimeter with auto-ranging and dual-slope integration.

IC Role / Device Role / Timing Role: Precision reference for integrator capacitor charging and comparator threshold generation.

Use Value: Low dynamic impedance prevents reference droop during rapid range switching; 1% tolerance meets Class II accuracy standards.

Wearable Health Sensors

Industrial IoT Edge Nodes

Use Scenario: Optical pulse oximetry module powered by rechargeable Li-ion with intermittent BLE transmission.

IC Role / Device Role / Timing Role: Reference for transimpedance amplifier and LED current control DAC.

Use Value: Unconditional stability allows direct connection to photodiode TIA output without isolation resistors-reducing noise and component count.

Use Scenario: Wireless vibration sensor node deployed in factory machinery with 10-year maintenance cycle.

IC Role / Device Role / Timing Role: Reference for MEMS accelerometer signal chain and low-power MCU ADC.

Use Value: Wide operating current range (8 µA–20 mA) supports both sleep-mode self-test and full-bandwidth FFT acquisition without hardware reconfiguration.

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	2.5 V adjustable reference; requires external resistors; 80 µA quiescent current; 50 ppm/°C tempco.	Not drop-in: higher voltage, higher current, less stable over temperature-requires redesign of bias network and feedback divider.	Select only if 2.5 V output and adjustable threshold are required; avoid for 1.22 V fixed-reference use cases.
LM385BZ-1.2	1.235 V nominal; 20 µA knee current; 100 ppm/°C max tempco; TO-92 package.	Larger footprint; higher knee current increases standby power; wider tempco reduces accuracy in extended temperature ranges.	Acceptable for cost-sensitive, non-portable designs where SOT23 size and µA operation are not critical.

Compared with TLVH431AIDBZR and LM385BZ-1.2, ZXRE1004FRSTZ uniquely combines 1.22 V fixed output, 4 µA knee current, and 20 ppm/°C tempco in SOT23-making it optimal for space- and energy-constrained precision analog front-ends where reference stability directly impacts measurement repeatability.

Availability

ZXRE1004FRSTZ is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered test equipment, and low-power data acquisition systems requiring stable component supply and long-term design continuity.

Supply support for ZXRE1004FRSTZ 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 consumer, industrial, and automotive markets.

The ZXRE1004 belongs to Diodes' precision voltage reference product line, engineered specifically for ultra-low-power, high-stability analog signal chains in portable and remote-sensing applications.

FAQ

What is the minimum operating current required for regulation?

The ZXRE1004FRSTZ achieves stable regulation at 4 µA typical knee current, with guaranteed operation down to 8 µA across temperature. Below 8 µA, output voltage may deviate beyond specification; design must ensure bias current remains ≥8 µA under worst-case conditions including low temperature and process variation.

Can ZXRE1004FRSTZ drive a 100 nF capacitive load without oscillation?

Yes-the device is unconditionally stable per datasheet, and testing confirms stable operation with up to 1 µF ceramic capacitors directly across cathode-to-ground. No series resistance or isolation is needed, simplifying layout for compact PCBs in portable devices.

Is Pin 3 electrically connected internally?

No-Pin 3 is a no-connect terminal with no internal bond wire or silicon connection. It must remain unconnected on the PCB; soldering or routing to any net violates the specified SOT23-3 pinout and may cause parametric failure or reliability risk.

How does the 20 ppm/°C tempco translate to voltage drift over temperature?

Over the full –40°C to +85°C range (125°C span), 20 ppm/°C yields maximum drift of 1.22 V × 20 × 10⁻⁶ × 125 = ±3.05 mV. This is verified in production testing and reflected in the ±1% initial tolerance plus tempco spec, ensuring total error remains within ±1.25% over temperature.

ZXRE1004FRSTZ Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Package/Case:: E-Line-3

Series:: -

Packaging:: Tape & Box (TB)

Product Status:: Obsolete

Reference Type:: Shunt

Output Type:: Fixed

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

Voltage - Output (Max):: -

Current - Output:: 20 mA

Tolerance:: ±3%

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)

ZXRE1004FRSTZ FAQ

1.How can I place an order for ZXRE1004FRSTZ through Aetrix?

Please submit a Request for Quotation (RFQ) for ZXRE1004FRSTZ 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 ZXRE1004FRSTZ reliable?

The price and inventory of ZXRE1004FRSTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE1004FRSTZ is usually 5 days.

3.What payment methods are accepted for ZXRE1004FRSTZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE1004FRSTZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZXRE1004FRSTZ?

ZXRE1004FRSTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZXRE1004FRSTZ 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 ZXRE1004FRSTZ?

For technical support, including ZXRE1004FRSTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE1004FRSTZ requirements.

6.How does Aetrix verify that ZXRE1004FRSTZ is sourced from the original manufacturer or authorized distributors?

All ZXRE1004FRSTZ 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 ZXRE1004FRSTZ meets industry standards.

7.What is the process for return or replacement of ZXRE1004FRSTZ?

All ZXRE1004FRSTZ units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE1004FRSTZ, 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 ZXRE1004FRSTZ part is unused and in its original packaging.

Return procedure for ZXRE1004FRSTZ:

1.Submit a request within 90 days.

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

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