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Diodes Incorporated ZXRE1004EFTC
- Part No.:
- ZXRE1004EFTC
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZXRE1004EFTC.pdf
- Description:
- IC VREF SHUNT 2% SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,731
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Product details
Overview
ZXRE1004EFTC 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 ±2% 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 ZXRE1004EFTC datasheet, ZXRE1004EFTC pinout, ZXRE1004EFTC application, or ZXRE1004EFTC 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 designs.
Technical Context
The ZXRE1004EFTC operates as a two-terminal shunt reference, requiring external current sourcing to establish reverse-biased conduction across its bandgap core. It maintains regulation over 8 µA–20 mA supply current while delivering stable 1.22 V output with minimal dynamic impedance (0.2 Ω typical at 1 mA).
Its unconditionally stable architecture tolerates unlimited capacitive loading without oscillation, eliminating need for series resistance or external compensation-critical for noise-sensitive data acquisition and low-EMI portable systems where layout parasitics dominate.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.22 V nominal; ±2% initial accuracy ensures ≤24.4 mV absolute error at room temperature for 12-bit ADC biasing. |
| Knee Current | 4 µA typical; enables operation from nanoamp-level bias sources, extending battery life in always-on sensor nodes. |
| Tempco | 20 ppm/°C typical; contributes ≤1.7 mV drift over –40°C to +85°C, supporting industrial-grade measurement repeatability. |
| Dynamic Impedance | 0.2 Ω typical at 1 mA; minimizes load-induced voltage shift during fast-sampling ADC conversions. |
| Noise (10Hz–10kHz) | 60 µVrms; low enough to avoid degrading ENOB in 16-bit SAR ADCs without additional filtering. |
| Capacitive Load Stability | Unconditional; allows direct connection to large decoupling caps (≥10 µF) without phase margin loss or ringing. |
Pinout & Package
SOT23-3 package (JEDEC MO-215AA), 2.80–3.04 mm × 2.10–2.64 mm footprint, 1.12 mm max height, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Current Sink Input | Receives regulated current from external source; connects to positive rail via current-setting resistor. |
| Pin 2 (Cathode) | Reference Output | Provides stable 1.22 V output referenced to ground; must be tied to system ground for proper regulation. |
| Pin 3 (NC / Floating) | No Connect | Internally unconnected; left floating per datasheet-no tie to Pin 1 or ground required for functionality. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low knee current | 4 µA typical enables use with high-value bias resistors (>1 MΩ) in coin-cell-powered devices. |
| Wide operating current range | 8 µA to 20 mA supports both micropower sleep modes and full-speed converter biasing from same BOM part. |
| Unconditional capacitive stability | Eliminates need for series damping resistors-reducing component count and board area in compact layouts. |
| Low wideband noise | 60 µVrms (10 Hz–10 kHz) avoids post-conversion digital filtering overhead in precision measurement front-ends. |
Applications
| Battery-Powered Sensor Nodes | Precision Data Acquisition Systems |
|---|---|
Use Scenario: Long-life wireless environmental sensors powered by CR2032 cells with 10-year target lifetime. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 1.22 V bias for 12-bit sigma-delta ADC and low-power op-amp signal conditioning. Use Value: 4 µA knee current reduces quiescent current draw below 5 µA, enabling >3 years of operation on single coin cell without energy harvesting. | Use Scenario: Portable handheld multimeter with dual-range 16-bit ADC and auto-ranging front-end. IC Role / Device Role / Timing Role: Primary reference for ratiometric scaling of input ranges and internal DAC calibration. Use Value: 20 ppm/°C tempco limits full-scale error to <0.02% over operating temperature, meeting Class II accuracy requirements. |
| Portable Medical Instrumentation | Industrial IoT Edge Controllers |
Use Scenario: Wearable ECG monitor with analog front-end and Bluetooth LE telemetry. IC Role / Device Role / Timing Role: Reference for programmable gain amplifier and anti-aliasing filter cutoff setting. Use Value: Unconditional capacitive stability allows direct integration with 4.7 µF ceramic bulk cap-suppressing switching noise from BLE radio without destabilizing reference. | Use Scenario: DIN-rail mounted PLC I/O module with isolated analog inputs and local power management. IC Role / Device Role / Timing Role: Calibration reference for 24-bit delta-sigma ADC used in 4–20 mA loop diagnostics. Use Value: 0.2 Ω dynamic impedance prevents reference droop during simultaneous sampling of 8 channels, maintaining <0.001% inter-channel crosstalk. |
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 | 1.2 V nominal, ±0.5% tolerance, 50 ppm/°C max tempco, 10 µA knee current | Higher accuracy but higher power; requires ≥10 µA minimum current | Select when tighter initial tolerance outweighs micropower needs |
| REF1004CM | 1.2 V nominal, ±0.5% tolerance, 25 ppm/°C max tempco, 10 µA knee current | Pin-compatible but higher knee current; not suitable for sub-10 µA systems | Prefer for legacy REF1004 drop-in replacement where existing PCB layout must be preserved |
Compared with LT1004CZ-1.2 and REF1004CM, the ZXRE1004EFTC trades ±0.5% tolerance for 60% lower knee current and superior capacitive-load immunity-making it optimal for new ultra-low-power designs where layout flexibility and battery longevity are prioritized over millivolt-level initial accuracy.
Availability
ZXRE1004EFTC is available at Aetrix Electronics and suitable for battery-powered sensor nodes, precision data acquisition systems, and portable medical instrumentation requiring stable component supply with long-term lifecycle visibility.
Supply support for ZXRE1004EFTC 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 centers across Asia and manufacturing in certified ISO/TS 16949 and ISO 14001 facilities.
The ZXRE1004 belongs to Diodes' precision reference product line, engineered specifically for ultra-low-current, high-stability voltage referencing in portable and energy-constrained systems-not general-purpose power management or signal conditioning.
FAQ
What is the maximum capacitive load the ZXRE1004EFTC can drive without instability?
The ZXRE1004EFTC is unconditionally stable and does not specify a maximum capacitive load limit. Datasheet testing confirms stable operation with ≥10 µF ceramic capacitors directly connected to the cathode pin, making it suitable for noisy environments where bulk decoupling is required without added series resistance or compensation networks.
Can ZXRE1004EFTC replace LT1004 in an existing design without circuit modification?
Yes, ZXRE1004EFTC is pin-compatible with LT1004 in SOT23-3 package and functions as a direct shunt reference replacement. However, its 4 µA knee current is lower than LT1004's 10 µA, so existing bias resistors may need upward adjustment to ensure minimum operating current is met across temperature and supply variations.
Does ZXRE1004EFTC require a minimum load current to maintain regulation?
No-it is a two-terminal shunt reference that regulates only when supplied with sufficient current above its knee point (4 µA typical). Unlike series references, it has no minimum load requirement; regulation is maintained as long as sourced current stays within 8 µA–20 mA range and voltage across the device remains ≥1.22 V.
Is ZXRE1004EFTC qualified for automotive applications under AEC-Q100?
No-ZXRE1004EFTC is not AEC-Q100 qualified. Diodes offers automotive-grade alternatives such as the AZR431Q series for qualified applications. For automotive use, contact Diodes' automotive sales team to discuss PPAP-capable, IATF 16949-manufactured equivalents with extended temperature range and qualification documentation.
ZXRE1004EFTC 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:
- ±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:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ZXRE1004EFTC FAQ
1.How can I place an order for ZXRE1004EFTC through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXRE1004EFTC 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 ZXRE1004EFTC reliable?
The price and inventory of ZXRE1004EFTC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE1004EFTC is usually 5 days.
3.What payment methods are accepted for ZXRE1004EFTC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE1004EFTC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXRE1004EFTC?
ZXRE1004EFTC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXRE1004EFTC 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 ZXRE1004EFTC?
For technical support, including ZXRE1004EFTC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE1004EFTC requirements.
6.How does Aetrix verify that ZXRE1004EFTC is sourced from the original manufacturer or authorized distributors?
All ZXRE1004EFTC 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 ZXRE1004EFTC meets industry standards.
7.What is the process for return or replacement of ZXRE1004EFTC?
All ZXRE1004EFTC units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE1004EFTC, 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 ZXRE1004EFTC part is unused and in its original packaging.
Return procedure for ZXRE1004EFTC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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