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

Diodes Incorporated ZXRE1004FFTA

Name: ZXRE1004FFTA
Brand: Diodes Incorporated
SKU: ZXRE1004FFTA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZXRE1004FFTA

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: ZXRE1004FFTA.pdf

Description:: IC VREF SHUNT 3% SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:1,121

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Product details

Overview

ZXRE1004FFTA from Diodes Incorporated is a 1.22 V bandgap voltage reference IC with 4 µA typical knee current, ±3% initial tolerance, and 20 ppm/°C typical temperature coefficient in SOT23-3 package. It operates over 8 µA–20 mA supply current and maintains unconditional stability with capacitive loads-ideal for precision low-power analog signal conditioning in portable instrumentation.

For engineers reviewing the ZXRE1004FFTA datasheet, ZXRE1004FFTA pinout, ZXRE1004FFTA application, or ZXRE1004FFTA equivalent, key selection criteria include ultra-low quiescent current, tight thermal drift, SOT23 footprint compatibility, and proven stability under varying load capacitance in battery-constrained systems.

Technical Context

The ZXRE1004FFTA functions as a two-terminal shunt reference, sinking current to regulate a stable 1.22 V output across its anode–cathode terminals. Its bandgap core achieves 20 ppm/°C typical TC and maintains <1 mV ΔV_R over 8 µA–1 mA operating range.

Designed for high capacitive-load tolerance, it requires no external compensation and delivers 0.2 Ω typical dynamic impedance at 1 mA. Noise performance is specified at 60 µV_rms (10 Hz–10 kHz), supporting high-resolution ADC/DAC biasing without added filtering.

Key Specifications

Parameter	Value and Actual Design Meaning
Reference Voltage	1.22 V nominal; ±3% initial accuracy ensures predictable bias point for 12-bit+ data converters.
Knee Current	4 µA typical; enables operation from microamp-level supplies in always-on sensor nodes.
Temp Coefficient	20 ppm/°C typical; limits voltage drift to ±1.7 mV over –40°C to +85°C ambient.
Operating Current	8 µA to 20 mA; supports wide dynamic range from ultra-low-power sleep modes to active signal chain biasing.
Dynamic Impedance	0.2 Ω typical at 1 mA; minimizes load-induced voltage perturbation in precision feedback networks.
Wideband Noise	60 µV_rms (10 Hz–10 kHz); avoids noise floor elevation in 16-bit SAR ADC reference paths.

Pinout & Package

SOT23-3 package (JEDEC TO-236AB), 2.80 × 2.64 × 1.12 mm body, gull-wing leads, RoHS-compliant, halogen-free "Green" construction.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Current sink input	Connected to regulated node; sets reference voltage via external resistor to V_CC.
Cathode (Pin 2)	Output reference terminal	Provides stable 1.22 V relative to Anode; connects to ADC REF+, op-amp non-inverting input, or DAC bias.
No-Connect (Pin 3)	Unused terminal	Internally unconnected; must be left floating or tied to Cathode per layout best practice.

Key Features

Feature	Design Value
Ultra-low knee current	4 µA typical enables direct use with high-value bias resistors (>1 MΩ) in coin-cell-powered devices.
Unconditional stability	No external capacitor required up to 10 nF load; eliminates layout sensitivity in space-constrained PCBs.
Low dynamic impedance	0.2 Ω at 1 mA reduces load regulation error to <0.2 mV per 100 µA load step.
Tight thermal drift	20 ppm/°C typical ensures <±2 mV total drift over industrial temperature range-critical for field-deployed sensors.

Applications

Portable Instrumentation

Precision Power Supplies

Use Scenario: Handheld multimeter front-end with 16-bit sigma-delta ADC requiring stable reference under variable battery voltage.

IC Role / Device Role / Timing Role: Shunt voltage reference providing 1.22 V reference to ADC's internal PGA and conversion core.

Use Value: 4 µA knee current extends battery life beyond 1 year; 20 ppm/°C TC prevents calibration drift during field use.

Use Scenario: Low-noise LDO feedback divider where reference stability defines output accuracy and line regulation.

IC Role / Device Role / Timing Role: Precision shunt reference setting V_OUT = 1.22 V × (1 + R1/R2) in adjustable regulator loop.

Use Value: 0.2 Ω dynamic impedance ensures <0.1% load regulation error; 60 µV_rms noise avoids output ripple amplification.

Data Acquisition Systems

A/D and D/A Converters

Use Scenario: Remote environmental sensor node sampling temperature/humidity at 1 SPS with 12-bit resolution.

IC Role / Device Role / Timing Role: Reference source for multiplexed single-supply ADC driving SPI interface.

Use Value: Operates down to 8 µA supply current-compatible with nanoamp sleep controllers; SOT23 footprint saves board area.

Use Scenario: Battery-powered audio DAC requiring clean, stable reference for analog output stage.

IC Role / Device Role / Timing Role: Bias reference for DAC's internal current-steering array and output op-amp.

Use Value: 60 µV_rms noise prevents audible hiss; 1.22 V matches common DAC full-scale scaling ratios.

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-1.2	1.200 V nominal, ±0.5% tolerance, 50 ppm/°C max TC, 45 µA typical I_KNEE	Higher knee current limits use in sub-10 µA systems; tighter initial tolerance suits factory-calibrated instruments.	Select when absolute initial accuracy > temperature stability; avoid in energy-harvesting designs.
LT1004CZ-1.2	1.200 V nominal, ±1% tolerance, 50 ppm/°C typical TC, 10 µA typical I_KNEE, higher Z_R (1.5 Ω)	Higher dynamic impedance degrades load regulation; wider TC increases field calibration burden.	Choose only if legacy LT1004 footprint compatibility is mandatory; not recommended for new low-drift designs.

Compared with REF1004CMX-1.2 and LT1004CZ-1.2, ZXRE1004FFTA delivers superior ultra-low-current operation and lower thermal drift-making it optimal for battery lifetime-critical, thermally uncontrolled environments where initial tolerance is secondary to long-term stability.

Availability

ZXRE1004FFTA is available at Aetrix Electronics and suitable for portable instrumentation, precision power supplies, and data acquisition systems requiring stable component supply with verified long-term manufacturability.

Supply support for ZXRE1004FFTA 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, headquartered in Plano, Texas, with design and manufacturing facilities across Asia and the Americas.

The ZXRE1004 belongs to Diodes' precision reference product line, engineered specifically for ultra-low-power, high-stability analog signal conditioning in portable and battery-operated equipment.

FAQ

What is the minimum operating current for reliable regulation?

The ZXRE1004FFTA achieves stable regulation at 4 µA typical knee current, but guaranteed operation begins at 8 µA per datasheet specifications. Below this, reference voltage may deviate beyond ±3% tolerance due to insufficient bandgap core biasing-designers should maintain ≥8 µA for production-grade accuracy.

Can ZXRE1004FFTA drive a 10 nF capacitive load without oscillation?

Yes-the device is unconditionally stable up to 10 nF capacitive load per datasheet characterization. No series resistance or external compensation is required. This eliminates layout risk in compact sensor modules where decoupling caps are placed near the reference output.

How does the 3% tolerance affect system calibration?

The ±3% initial tolerance means the actual reference voltage falls between 1.183 V and 1.257 V at 25°C. For systems requiring <0.1% absolute accuracy, end-of-line calibration against a metrology-grade standard is necessary-this tolerance is acceptable for relative measurements or ratiometric ADC configurations.

Is ZXRE1004FFTA qualified for automotive applications?

No-ZXRE1004FFTA is not AEC-Q100 qualified. Diodes offers automotive-grade alternatives (e.g., AP431x series) with PPAP support and IATF 16949 manufacturing. For automotive use, contact Diodes' automotive sales team to identify qualified replacements meeting temperature, reliability, and change-control requirements.

ZXRE1004FFTA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Package/Case:: TO-236-3, SC-59, SOT-23-3

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:: ±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:: Surface Mount

Supplier Device Package:: SOT-23-3

ZXRE1004FFTA FAQ

1.How can I place an order for ZXRE1004FFTA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZXRE1004FFTA 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 ZXRE1004FFTA reliable?

The price and inventory of ZXRE1004FFTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE1004FFTA is usually 5 days.

3.What payment methods are accepted for ZXRE1004FFTA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE1004FFTA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZXRE1004FFTA?

ZXRE1004FFTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZXRE1004FFTA 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 ZXRE1004FFTA?

For technical support, including ZXRE1004FFTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE1004FFTA requirements.

6.How does Aetrix verify that ZXRE1004FFTA is sourced from the original manufacturer or authorized distributors?

All ZXRE1004FFTA 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 ZXRE1004FFTA meets industry standards.

7.What is the process for return or replacement of ZXRE1004FFTA?

All ZXRE1004FFTA units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE1004FFTA, 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 ZXRE1004FFTA part is unused and in its original packaging.

Return procedure for ZXRE1004FFTA:

1.Submit a request within 90 days.

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

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