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

Diodes Incorporated ZXRE1004DRSTOA

Name: ZXRE1004DRSTOA
Brand: Diodes Incorporated
SKU: ZXRE1004DRSTOA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZXRE1004DRSTOA

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: E-Line-3

Datasheet:: ZXRE1004DRSTOA.pdf

Description:: IC VREF SHUNT 1% E-LINE

Quantity:: RFQ Add To RFQ list

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Inventory:1,396

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Product details

Overview

ZXRE1004DRSTOA from Diodes Incorporated is a micropower (4µA typical knee current), 1.22V bandgap voltage reference in SOT23 package, with 1% initial tolerance and 20ppm/°C typical temperature coefficient. It operates over 8µA–20mA supply current and delivers stable reference performance for precision analog signal chains in portable battery-powered systems.

For engineers reviewing the ZXRE1004DRSTOA datasheet, ZXRE1004DRSTOA pinout, ZXRE1004DRSTOA application, or ZXRE1004DRSTOA equivalent, key selection criteria include ultra-low quiescent current, capacitive-load immunity, tight thermal drift, and compatibility with legacy 3-pin TO-92 references in space-constrained PCB layouts.

Technical Context

The ZXRE1004DRSTOA implements a two-terminal shunt-mode bandgap reference architecture, requiring an external current source and operating as a precision voltage sink. Its design maintains regulation across a wide 8µA to 20mA dynamic current range while sustaining low output impedance (0.2Ω typical at 1mA) and low wideband noise (60µV_rms).

It achieves unconditional stability without external compensation due to internal compensation optimized for ≥1nF capacitive loads, and its temperature coefficient is characterized using the standard TC formula over –40°C to +85°C, yielding 20ppm/°C typical deviation.

Key Specifications

Parameter	Value and Actual Design Meaning
Reference Voltage	1.22 V ±1% at 25°C - defines absolute accuracy of ADC/DAC biasing and sensor excitation circuits
Knee Current	4 µA typical - minimum current required to enter regulation, enabling ultra-low-power wake-up modes
Temp Coefficient	20 ppm/°C typical - ensures ≤2.5 mV drift over –40°C to +85°C, critical for portable instrumentation
Operating Current	8 µA to 20 mA - supports flexible biasing from energy-harvesting nodes to high-precision power supplies
Dynamic Impedance	0.2 Ω typical at 1 mA - minimizes load-induced voltage error in multi-channel data acquisition
Noise (10Hz–10kHz)	60 µV_rms - limits quantization uncertainty in 16-bit+ SAR ADC front-ends

Pinout & Package

SOT23-3 package (JEDEC MO-178AA), 2.80 × 2.64 × 1.12 mm body, surface-mount, lead-free and RoHS compliant.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Anode)	Current Input Terminal	Accepts regulated bias current from external resistor or current source; connected to system V_CC via series resistor
Pin 2 (Cathode)	Reference Output / Ground Reference	Provides stable 1.22V output relative to system ground; must be tied directly to clean analog ground plane
Pin 3 (NC)	No Connect	Floating per datasheet; not internally bonded - must remain unconnected to avoid parasitic coupling

Key Features

Feature	Design Value
Unconditionally stable	Operates with ≥1nF capacitive load without oscillation - eliminates need for external compensation networks
Shunt topology	Two-terminal operation simplifies layout and enables floating reference generation in isolated DC-DC feedback paths
Low knee current	4µA start-up threshold allows use with high-value bias resistors (>1MΩ), reducing standby power in always-on sensors
Legacy pin compatibility	Direct replacement for REF1004/LT1004/LM185 in SOT23 footprint - enables drop-in upgrade without PCB redesign

Applications

Battery-Powered Instrumentation

Precision Data Acquisition

Use Scenario: Handheld multimeter with 24-hour battery life and 16-bit resolution.

IC Role / Device Role / Timing Role: Shunt voltage reference for ADC reference input and sensor excitation circuitry.

Use Value: 4µA knee current extends battery life; 20ppm/°C TC ensures calibration stability across field temperature ranges.

Use Scenario: Industrial 8-channel thermocouple logger with cold-junction compensation.

IC Role / Device Role / Timing Role: Precision reference for analog front-end PGA and sigma-delta ADC reference rail.

Use Value: 0.2Ω dynamic impedance prevents channel-to-channel crosstalk during multiplexed sampling.

Portable Communication Devices

Test & Measurement Equipment

Use Scenario: Bluetooth LE audio transmitter with integrated DAC and RF PA bias control.

IC Role / Device Role / Timing Role: Reference for DAC full-scale setting and PA current-sense amplifier offset calibration.

Use Value: 60µV_rms noise avoids audible distortion in 24-bit audio path; SOT23 saves board area in compact module.

Use Scenario: Benchtop digital multimeter with auto-ranging and 5½-digit display.

IC Role / Device Role / Timing Role: Primary reference for dual-slope integrator and autoranging reference switching network.

Use Value: 1% initial tolerance and <2.5mV total drift eliminate frequent recalibration; 20mA max current supports fast settling during 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 1.22V nominal, but 0.5% tolerance and higher 10µA knee current	Better initial accuracy, less suitable for sub-10µA ultra-low-power designs	Select when tighter initial tolerance outweighs quiescent current penalty
LT1004CZ-1.2	1.2V nominal, 1% tolerance, 10µA knee current, higher 50ppm/°C TC	Lower reference voltage requires circuit re-biasing; higher drift limits high-temp operation	Select only if legacy LT1004 footprint reuse is mandatory and 1.2V suffices

Compared with REF1004CMX and LT1004CZ-1.2, the ZXRE1004DRSTOA offers the lowest knee current (4µA vs. ≥10µA) and best thermal stability (20ppm/°C vs. ≥50ppm/°C), making it optimal for battery-critical, wide-temperature portable systems where both power and accuracy are constrained.

Availability

ZXRE1004DRSTOA is available at Aetrix Electronics and suitable for battery-powered instrumentation, precision data acquisition, and portable communication devices requiring stable component supply with long-term lifecycle visibility.

Supply support for ZXRE1004DRSTOA 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 portable and battery-operated equipment.

FAQ

What is the correct biasing method for ZXRE1004DRSTOA?

The ZXRE1004DRSTOA is a two-terminal shunt reference: connect Pin 1 (anode) to a current source or resistor tied to V_CC, and Pin 2 (cathode) to system ground. The cathode node provides the 1.22V reference output. Pin 3 is NC and must remain unconnected. Minimum bias current is 8µA; typical regulation begins at 4µA knee current.

Can ZXRE1004DRSTOA drive a 100nF capacitor directly?

Yes - the device is unconditionally stable with capacitive loads up to at least 1µF, as confirmed by Diodes' characterization. A 100nF capacitor may be placed directly at the cathode (Pin 2) to reduce high-frequency noise without risk of oscillation, eliminating the need for series resistance or external compensation.

How does the 1% tolerance affect system calibration?

The 1% initial tolerance (±12.2mV at 1.22V) sets the baseline accuracy before trimming. In production, this allows single-point calibration at room temperature to achieve <0.1% system-level reference error. For uncalibrated applications like basic sensor biasing, the 1% tolerance contributes directly to overall measurement uncertainty.

Is ZXRE1004DRSTOA qualified for automotive use?

No - ZXRE1004DRSTOA is not AEC-Q100 qualified. Diodes offers automotive-grade alternatives (e.g., AP2112K) for qualified applications. This part is specified for industrial and commercial temperature ranges (–40°C to +85°C) and lacks PPAP documentation, IATF 16949 manufacturing certification, or stress-test validation required for automotive deployment.

ZXRE1004DRSTOA 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:: ±1%

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)

ZXRE1004DRSTOA FAQ

1.How can I place an order for ZXRE1004DRSTOA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZXRE1004DRSTOA 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 ZXRE1004DRSTOA reliable?

The price and inventory of ZXRE1004DRSTOA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE1004DRSTOA is usually 5 days.

3.What payment methods are accepted for ZXRE1004DRSTOA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE1004DRSTOA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZXRE1004DRSTOA?

ZXRE1004DRSTOA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZXRE1004DRSTOA 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 ZXRE1004DRSTOA?

For technical support, including ZXRE1004DRSTOA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE1004DRSTOA requirements.

6.How does Aetrix verify that ZXRE1004DRSTOA is sourced from the original manufacturer or authorized distributors?

All ZXRE1004DRSTOA 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 ZXRE1004DRSTOA meets industry standards.

7.What is the process for return or replacement of ZXRE1004DRSTOA?

All ZXRE1004DRSTOA units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE1004DRSTOA, 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 ZXRE1004DRSTOA part is unused and in its original packaging.

Return procedure for ZXRE1004DRSTOA:

1.Submit a request within 90 days.

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

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