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

Diodes Incorporated ZXRE1004FR

Name: ZXRE1004FR
Brand: Diodes Incorporated
SKU: ZXRE1004FR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZXRE1004FR

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

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

Datasheet:: ZXRE1004FR.pdf

Description:: IC VREF SHUNT 3% TO92

Quantity:: RFQ Add To RFQ list

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Inventory:2,305

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Product details

Overview

ZXRE1004FR from Diodes Incorporated is a micropower (4µA typical knee current), 1.22V bandgap voltage reference in SOT23-3 package, with 1% initial tolerance and 20ppm/°C typical temperature coefficient, designed for ultra-low-power precision analog circuits in battery-powered instrumentation and data acquisition systems.

For engineers reviewing the ZXRE1004FR datasheet, ZXRE1004FR pinout, ZXRE1004FR application, or ZXRE1004FR equivalent, key selection criteria include knee current stability at sub-10µA operation, capacitive-load immunity, reverse breakdown voltage drift over −40°C to +85°C, and compatibility with A/D converter reference inputs requiring low-noise (<60µV_rms) and low dynamic impedance (<0.6Ω).

Technical Context

The ZXRE1004FR operates as a two-terminal shunt voltage reference, configured in reverse-biased mode with cathode connected to supply and anode to ground. Its bandgap core delivers stable 1.22V output across 8µA–20mA operating current range, maintaining <1mV ΔV_R from 8µA to 1mA and <10mV from 1mA to 20mA.

It exhibits unconditional stability with capacitive loads up to 10nF, enabled by internal compensation. Temperature coefficient is calculated per JEDEC JESD22-A119 methodology: TC = [(V_RMAX − V_RMIN) × 10⁶] / [V_R × (T_MAX − T_MIN)], yielding 20ppm/°C typical over −40°C to +85°C.

Key Specifications

Parameter	Value and Actual Design Meaning
Reference Voltage	1.22 V ±1% at 100µA, enabling direct use in 12-bit ADCs with ≤0.5 LSB error
Knee Current	4 µA typical, allowing operation from microampere-level bias sources in energy-harvesting sensors
Temp Coefficient	20 ppm/°C typical, limiting drift to ±1.7 mV over full −40°C to +85°C range
Dynamic Impedance	0.2 Ω typical at 1mA, minimizing load-induced reference perturbation in multiplexed systems
Wideband Noise	60 µV_rms (10Hz–10kHz), supporting high-resolution SAR and sigma-delta ADCs without external filtering
Operating Current Range	8 µA to 20 mA, supporting both ultra-low-power sleep modes and active high-speed conversion bursts

Pinout & Package

SOT23-3 package (suffix -F), 2.80–3.04 mm length, 2.10–2.64 mm width, 1.12 mm max height; RoHS-compliant, halogen-free, lead-free construction.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Anode)	Reference Ground Terminal	Connected to system ground; must be low-impedance path to avoid noise coupling into reference node
Pin 2 (Cathode)	Input/Output Terminal	Reverse-biased connection point: tied to regulated supply via series resistor; sets operating current
Pin 3 (NC)	No Connect	Floating or internally unconnected; no electrical function-must remain unconnected per datasheet

Key Features

Feature	Design Value
Unconditional Stability	Maintains regulation with ≥10nF capacitive load-eliminates need for external isolation resistors in ADC reference decoupling
Low Knee Current	4µA typical enables use with high-value bias resistors (>1MΩ) in coin-cell-powered devices
Tight Initial Tolerance	±1% (ZXRE1004DFTA variant) reduces calibration overhead in portable medical sensors
Low Dynamic Impedance	0.2Ω typical at 1mA ensures <100µV droop during 10mA transient load steps in multi-channel DAQ
Wide Operating Current Range	8µA–20mA supports shared reference rails across sleep/wake states without re-biasing

Applications

Battery-Powered Instrumentation

Precision Data Acquisition

Use Scenario: Handheld multimeter with 16-bit SAR ADC and coin-cell power source.

IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 1.22V reference for ADC full-scale calibration.

Use Value: 4µA knee current extends battery life beyond 5 years; 20ppm/°C TC ensures <0.02% reading drift across field operating temperatures.

Use Scenario: Industrial sensor node digitizing thermocouple and RTD signals using dual 24-bit sigma-delta ADCs.

IC Role / Device Role / Timing Role: Shared precision reference for both ADCs, eliminating inter-channel gain mismatch.

Use Value: 0.2Ω dynamic impedance prevents crosstalk-induced offset shifts during simultaneous conversions; 60µV_rms noise avoids degrading ENOB below 21 bits.

Portable Communication Devices

Notebook System Monitoring

Use Scenario: LTE modem module requiring accurate V_BAT monitoring and RF front-end bias control.

IC Role / Device Role / Timing Role: Reference for ADC measuring battery voltage and DAC setting PA bias points.

Use Value: Stable 1.22V output under pulsed 20mA load transients ensures consistent RF power control accuracy across transmit bursts.

Use Scenario: Embedded controller in ultrabook monitoring CPU core voltage, memory rail, and battery health.

IC Role / Device Role / Timing Role: Low-power reference for multi-rail PMIC telemetry ADC.

Use Value: 1% tolerance eliminates factory trim; SOT23 footprint saves PCB area in space-constrained EC modules.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
LT1004CZ-1.2	2.0V reference, 50ppm/°C TC, 10µA knee current, TO-92 package	Higher power consumption and larger footprint; unsuitable for space-constrained SMT designs	Select only if legacy TO-92 board layout or 2.0V reference level required
REF1004CM	1.2V reference, 50ppm/°C TC, 10µA knee current, SO-8 package	Higher quiescent current and wider temp drift reduce battery life and measurement accuracy in portable gear	Prefer only when existing SO-8 footprint reuse is mandatory and 20ppm/°C stability is not critical

Compared with LT1004CZ-1.2 and REF1004CM, ZXRE1004FR delivers 2.5× lower knee current, 2.5× better temperature stability, and 60% smaller footprint-making it optimal for next-generation portable instrumentation where size, power, and precision are co-constrained.

Availability

ZXRE1004FR is available at Aetrix Electronics and suitable for battery-powered instrumentation, precision data acquisition systems, and portable communication devices requiring stable component supply with guaranteed long-term availability.

Supply support for ZXRE1004FR 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-efficiency power management, signal integrity, and precision analog solutions.

The ZXRE1004FR belongs to Diodes' precision voltage reference product line, engineered specifically for ultra-low-power, high-stability analog signal conditioning in portable and energy-sensitive applications.

FAQ

What is the maximum capacitive load the ZXRE1004FR can drive without oscillation?

The ZXRE1004FR is unconditionally stable with capacitive loads up to 10nF, as verified in Diodes' DS32172 characterization. This eliminates the need for series isolation resistors typically required with older references like LT1004, simplifying PCB layout and reducing component count in ADC reference decoupling networks.

Can ZXRE1004FR replace LM385-1.2 in existing designs?

Yes-ZXRE1004FR is pin-compatible with LM385-1.2 in SOT23-3 footprint and offers superior specs: 4µA vs. 10µA knee current, 20ppm/°C vs. 50ppm/°C TC, and 0.2Ω vs. 2Ω dynamic impedance. No circuit changes are needed beyond verifying bias resistor value meets minimum 8µA operating current.

Does ZXRE1004FR require external trimming for 1% tolerance applications?

No-ZXRE1004FR (DFTA variant) is factory-trimmed to ±1% initial tolerance at 100µA, eliminating post-assembly calibration. The 1.22V reference voltage remains within specification across its full operating current range (8µA–20mA) and temperature range (−40°C to +85°C), as confirmed in DS32172 Table 2.

Is ZXRE1004FR qualified for automotive applications?

No-ZXRE1004FR is not AEC-Q100 qualified. Diodes offers automotive-grade alternatives (e.g., AP2112K) but explicitly states that ZXRE1004FR is intended for commercial/industrial use only. For automotive designs, contact Diodes' automotive team for PPAP-capable, IATF 16949-manufactured equivalents.

ZXRE1004FR Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

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):: 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:: TO-92

ZXRE1004FR FAQ

1.How can I place an order for ZXRE1004FR through Aetrix?

Please submit a Request for Quotation (RFQ) for ZXRE1004FR 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 ZXRE1004FR reliable?

The price and inventory of ZXRE1004FR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE1004FR is usually 5 days.

3.What payment methods are accepted for ZXRE1004FR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE1004FR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZXRE1004FR?

ZXRE1004FR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZXRE1004FR 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 ZXRE1004FR?

For technical support, including ZXRE1004FR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE1004FR requirements.

6.How does Aetrix verify that ZXRE1004FR is sourced from the original manufacturer or authorized distributors?

All ZXRE1004FR 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 ZXRE1004FR meets industry standards.

7.What is the process for return or replacement of ZXRE1004FR?

All ZXRE1004FR units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE1004FR, 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 ZXRE1004FR part is unused and in its original packaging.

Return procedure for ZXRE1004FR:

1.Submit a request within 90 days.

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

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