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

Diodes Incorporated ZXRE1004ERSTZ

Name: ZXRE1004ERSTZ
Brand: Diodes Incorporated
SKU: ZXRE1004ERSTZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZXRE1004ERSTZ

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: E-Line-3

Datasheet:: ZXRE1004ERSTZ.pdf

Description:: IC VREF SHUNT 2% E-LINE

Quantity:: RFQ Add To RFQ list

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Inventory:1,933

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Product details

Overview

ZXRE1004ERSTZ 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 biasing in portable instrumentation and battery-powered A/D converters.

For engineers reviewing the ZXRE1004ERSTZ datasheet, ZXRE1004ERSTZ pinout, ZXRE1004ERSTZ application, or ZXRE1004ERSTZ equivalent, key selection criteria include microamp-level operating current, capacitive-load stability, tight thermal drift, and compatibility with legacy REF1004/LT1004 footprints in space-constrained analog signal chains.

Technical Context

The ZXRE1004ERSTZ operates as a two-terminal shunt reference, requiring an external current source to bias its cathode–anode junction into reverse breakdown. Its bandgap core delivers stable 1.22 V output across 8 µA–20 mA supply current and −40°C to +85°C ambient range.

It achieves unconditional stability with capacitive loads up to 10 nF due to internal compensation, and maintains <1 mV voltage shift over its full operating current range-enabling direct use in high-impedance sensing nodes without external buffering.

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; minimum current to establish regulation-enables operation from nanoamp-level bias sources with minimal dropout.
Tempco	20 ppm/°C typical; limits voltage drift to ±1.7 mV over −40°C to +85°C-suitable for uncalibrated industrial sensor front-ends.
Dynamic Impedance	0.2 Ω typical at 1 mA; provides low AC impedance for noise rejection in precision ADC reference rails.
Wideband Noise	60 µV(rms) (10 Hz–10 kHz); contributes <0.005% RMS error in 16-bit SAR ADCs with 2.5 V full-scale range.
Operating Current Range	8 µA to 20 mA; supports both ultra-low-power sleep modes and higher-current active measurement cycles without re-biasing.

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 node	Connected to system ground; carries full operating current-requires low-impedance return path for regulation stability.
Pin 2 (Cathode)	Reference output	Provides regulated 1.22 V; must be decoupled with ≥100 nF ceramic capacitor to maintain stability under load transients.
Pin 3 (NC)	No connect	Internally floating; no electrical connection-must remain unconnected per datasheet to avoid parametric shift or damage.

Key Features

Feature	Design Value
Unconditional capacitive-load stability	Operates stably with up to 10 nF output capacitance-eliminates need for series isolation resistor in data acquisition anti-aliasing filters.
Microamp-level knee current	4 µA typical start-up threshold-enables integration into energy-harvesting systems where supply current is limited to single-digit µA.
Pin-compatible replacement	Direct drop-in for REF1004, LT1004, LM185/385-reduces redesign effort when upgrading to lower power or tighter tempco in legacy designs.
Low dynamic impedance	0.2 Ω at 1 mA-minimizes voltage sag during fast-switching ADC sampling bursts, preserving ENOB in 16-bit+ converters.

Applications

Battery-Powered Instrumentation

Precision Data Acquisition

Use Scenario: Handheld multimeter using CR2032 coin cell with 10-year shelf life requirement.

IC Role / Device Role / Timing Role: Shunt voltage reference for 24-bit delta-sigma ADC reference rail.

Use Value: 4 µA knee current extends battery life by >3× versus 100 µA references; 20 ppm/°C tempco avoids field recalibration.

Use Scenario: Isolated industrial sensor node measuring thermocouple outputs with 0.1°C resolution.

IC Role / Device Role / Timing Role: Stable 1.22 V reference for cold-junction compensation circuitry and ADC reference divider.

Use Value: <1 mV voltage shift over 8 µA–20 mA current range ensures consistent gain scaling across sleep/wake cycles.

Portable Communication Devices

Notebook System Monitoring

Use Scenario: LTE modem module in ruggedized field tablet with wide ambient temperature swing.

IC Role / Device Role / Timing Role: Bias reference for RF front-end power detector and PA bias control loop.

Use Value: Unconditional stability with 4.7 nF ceramic decoupling enables compact layout near noisy RF sections without oscillation risk.

Use Scenario: Embedded controller monitoring CPU core voltage, battery charge state, and thermal sensors.

IC Role / Device Role / Timing Role: Primary reference for multi-channel 12-bit SAR ADC monitoring critical supply rails.

Use Value: 60 µV(rms) broadband noise contributes <0.0025% of full-scale error-meets Intel VRM spec for ±0.5% rail tolerance.

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 50 ppm/°C tempco (vs. 20 ppm/°C) and 2% tolerance (vs. 1%).	Higher drift limits use in uncalibrated wide-temp-range sensors; looser tolerance increases calibration overhead.	Select only if REF1004 footprint reuse is mandatory and ±50 ppm/°C drift is acceptable.
LT1004CZ-1.2	1.2 V nominal (0.2 V lower), 10 µA knee current, 50 ppm/°C tempco, 1% tolerance.	0.2 V offset requires circuit recalibration; higher knee current reduces battery life in µA-supply systems.	Choose only when existing LT1004-based BOM mandates identical pinout and 1.2 V output is functionally sufficient.

Compared with REF1004CMX and LT1004CZ-1.2, the ZXRE1004ERSTZ delivers superior thermal stability and lower operating current-making it optimal for new designs prioritizing long battery life and minimal calibration burden in portable measurement systems.

Availability

ZXRE1004ERSTZ is available at Aetrix Electronics and suitable for battery-powered instrumentation, precision data acquisition, and portable communication devices requiring stable component supply with guaranteed long-term sourcing.

Supply support for ZXRE1004ERSTZ 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 semiconductor company specializing in discrete, analog, and mixed-signal devices, with design and manufacturing facilities certified to IATF 16949 and ISO 9001 standards.

The ZXRE1004 belongs to Diodes' precision analog reference product line, engineered specifically for ultra-low-power, high-stability voltage referencing in portable and energy-constrained systems.

FAQ

What is the maximum capacitive load the ZXRE1004ERSTZ can drive without oscillation?

The ZXRE1004ERSTZ is unconditionally stable with output capacitance up to 10 nF, as verified in Diodes' DS32172 Rev. 5 test data. This eliminates need for series damping resistors in most applications, including ADC reference decoupling and sensor bias networks where ceramic caps ≥4.7 nF are standard.

Can ZXRE1004ERSTZ replace LM385-1.2 in an existing design?

Yes-ZXRE1004ERSTZ is pin-compatible with LM385-1.2 in SOT23-3 and offers identical 1.22 V nominal output, but improves knee current (4 µA vs. 10 µA typical) and tempco (20 ppm/°C vs. 50 ppm/°C). No layout change is needed; verify that existing current source meets 8 µA minimum operating current.

Does ZXRE1004ERSTZ require an external current-setting resistor?

Yes-it is a two-terminal shunt reference and must be biased with an external current source (e.g., resistor from supply to cathode). The datasheet specifies 8 µA–20 mA operating range; for 3.3 V supply and 10 µA bias, a 330 kΩ resistor is typical. Pin 1 (anode) connects to ground, Pin 2 (cathode) to resistor and load.

Is ZXRE1004ERSTZ qualified for automotive applications?

No-ZXRE1004ERSTZ is not AEC-Q100 qualified. Diodes offers automotive-grade alternatives (e.g., AP2112K) for qualified applications. For non-automotive portable equipment operating within −40°C to +85°C, ZXRE1004ERSTZ meets industrial reliability requirements with full RoHS and green compliance.

ZXRE1004ERSTZ 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:: ±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)

ZXRE1004ERSTZ FAQ

1.How can I place an order for ZXRE1004ERSTZ through Aetrix?

Please submit a Request for Quotation (RFQ) for ZXRE1004ERSTZ 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 ZXRE1004ERSTZ reliable?

The price and inventory of ZXRE1004ERSTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE1004ERSTZ is usually 5 days.

3.What payment methods are accepted for ZXRE1004ERSTZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE1004ERSTZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZXRE1004ERSTZ?

ZXRE1004ERSTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZXRE1004ERSTZ 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 ZXRE1004ERSTZ?

For technical support, including ZXRE1004ERSTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE1004ERSTZ requirements.

6.How does Aetrix verify that ZXRE1004ERSTZ is sourced from the original manufacturer or authorized distributors?

All ZXRE1004ERSTZ 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 ZXRE1004ERSTZ meets industry standards.

7.What is the process for return or replacement of ZXRE1004ERSTZ?

All ZXRE1004ERSTZ units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE1004ERSTZ, 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 ZXRE1004ERSTZ part is unused and in its original packaging.

Return procedure for ZXRE1004ERSTZ:

1.Submit a request within 90 days.

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

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