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Diodes Incorporated ZXRE1004EFTA
- Part No.:
- ZXRE1004EFTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZXRE1004EFTA.pdf
- Description:
- IC VREF SHUNT 2% SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,803
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Product details
Overview
ZXRE1004EFTA from Diodes Incorporated is a 1.22 V bandgap voltage reference IC operating at 4 µA typical knee current, with 2% initial tolerance and 20 ppm/°C typical temperature coefficient in SOT23 package. It delivers stable reference voltage for precision analog signal chains in battery-powered instrumentation and portable data acquisition systems.
For engineers reviewing the ZXRE1004EFTA datasheet, ZXRE1004EFTA pinout, ZXRE1004EFTA application, or ZXRE1004EFTA equivalent, key selection criteria include ultra-low quiescent current (4 µA), tight thermal drift (20 ppm/°C), unconditionally stable operation with capacitive loads, and SOT23 footprint compatibility with legacy references like LT1004 and LM385.
Technical Context
The ZXRE1004EFTA implements a two-terminal shunt topology with bandgap-derived reference voltage generation, optimized for operation across 8 µA–20 mA load current range. Its internal architecture ensures monotonic voltage regulation without external compensation components.
It maintains reverse breakdown voltage stability over −40°C to +85°C ambient, with dynamic impedance of 0.2 Ω at 1 mA and wideband noise of 60 µV(rms) (10 Hz–10 kHz), enabling high-resolution ADC/DAC biasing in low-power embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.22 V nominal; ±2% tolerance ensures predictable ADC full-scale calibration error budget |
| Knee Current | 4 µA typical; enables operation from microamp-level bias sources in energy-harvesting circuits |
| Temp Coefficient | 20 ppm/°C typical; limits reference drift to ±1.7 mV over −40°C to +85°C |
| Operating Current | 8 µA to 20 mA; supports direct connection to high-impedance op-amp inputs or low-current DACs |
| Dynamic Impedance | 0.2 Ω at 1 mA; minimizes load-induced voltage shift in precision current-sense applications |
| Noise (10Hz–10kHz) | 60 µV(rms); avoids quantization noise floor elevation in 16-bit+ data converters |
Pinout & Package
SOT23-3 package (JEDEC MO-215AA), 2.80 × 2.64 × 1.12 mm body, surface-mount compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode (Input) | Connects to regulated supply rail; sinks current to establish reference voltage at cathode |
| Pin 2 | Cathode (Output) | Provides 1.22 V reference node; must be decoupled locally for noise-sensitive circuits |
| Pin 3 | NC / Floating | No internal connection; left unconnected per datasheet; not used for thermal or electrical functions |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low knee current | 4 µA typical enables use in coin-cell-powered devices with >10-year battery life |
| Unconditional stability | No external capacitor required for stability-reduces BOM count and PCB area |
| Low dynamic impedance | 0.2 Ω at 1 mA maintains reference accuracy under varying load conditions |
| Wide operating current range | 8 µA–20 mA accommodates both micropower sensor interfaces and higher-current analog front-ends |
Applications
| Battery-Powered Instrumentation | Precision Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter with 200-hour runtime on CR2032 cell. IC Role / Device Role / Timing Role: Shunt voltage reference for 16-bit sigma-delta ADC biasing. Use Value: 4 µA quiescent current extends battery life; 20 ppm/°C TC prevents calibration drift during field use. | Use Scenario: Portable environmental sensor node logging temperature/humidity at 1 Hz. IC Role / Device Role / Timing Role: Reference source for low-power SAR ADC sampling analog sensor outputs. Use Value: 0.2 Ω dynamic impedance ensures <0.1 LSB error under varying sensor excitation current. |
| Portable Communication Devices | Notebook Power Management |
Use Scenario: Bluetooth LE audio transmitter with integrated Li-ion fuel gauge. IC Role / Device Role / Timing Role: Reference for coulomb counter ADC measuring battery discharge current. Use Value: 60 µV(rms) noise avoids false low-battery triggers during RF transmission bursts. | Use Scenario: Embedded controller monitoring 1.8 V core rail in ultrabook platform. IC Role / Device Role / Timing Role: Precision reference for system power-rail monitor comparator. Use Value: 2% tolerance and 20 ppm/°C TC ensure accurate undervoltage detection across thermal cycles. |
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 TC, TO-92 package | Requires through-hole assembly; higher thermal drift limits high-accuracy portable use | Select when legacy TO-92 footprint or tighter initial tolerance is prioritized over ultra-low current |
| LM385BZ-1.2 | 1.235 V nominal, 1% tolerance, 100 ppm/°C TC, TO-92 package | Higher noise (120 µV(rms)), less stable at low currents below 10 µA | Choose only for cost-sensitive industrial designs where 100 ppm/°C drift is acceptable |
Compared with LT1004CZ-1.2 and LM385BZ-1.2, the ZXRE1004EFTA offers superior micropower operation (4 µA vs ≥20 µA), lower thermal drift (20 vs 50–100 ppm/°C), and SOT23 surface-mount compatibility-making it optimal for space-constrained, battery-critical applications despite its 2% tolerance.
Availability
ZXRE1004EFTA is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable communication devices, and notebook power management requiring stable component supply with consistent SOT23 packaging and traceable sourcing.
Supply support for ZXRE1004EFTA 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 ZXRE1004 belongs to Diodes' precision voltage reference product line, engineered specifically for ultra-low-power, space-constrained applications where traditional references consume excessive current or occupy too much board area.
FAQ
What is the minimum operating current for reliable regulation?
The ZXRE1004EFTA achieves stable regulation starting at 4 µA typical knee current, with guaranteed performance down to 8 µA across temperature. Below 8 µA, reference voltage may deviate beyond 2% tolerance due to insufficient internal bias current, so design must ensure ≥8 µA minimum sink current in all operating modes.
Can ZXRE1004EFTA drive a 100 pF capacitive load without oscillation?
Yes-the device is unconditionally stable with capacitive loads up to at least 1 nF, as confirmed by datasheet stability testing. No series resistor or external compensation is needed, making it suitable for direct connection to ADC reference inputs or op-amp feedback nodes with parasitic capacitance.
Is ZXRE1004EFTA qualified for automotive applications?
No-ZXRE1004EFTA is not AEC-Q100 qualified and is not manufactured in IATF 16949-certified facilities. For automotive use, Diodes recommends contacting their sales team for qualified alternatives such as the AP2112K or ZR431 series, which meet AEC-Q100 Grade 1 requirements.
How does the 2% tolerance affect 12-bit ADC accuracy?
With a 1.22 V reference, 2% tolerance introduces ±24.4 mV absolute error, corresponding to ±80 LSB in a 12-bit, 0–3.3 V ADC system. System-level calibration can correct this offset, but for uncalibrated designs, consider tighter-tolerance variants like ZXRE1004CFTA (0.5%) if <±20 LSB error is required.
ZXRE1004EFTA 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
ZXRE1004EFTA FAQ
1.How can I place an order for ZXRE1004EFTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXRE1004EFTA 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 ZXRE1004EFTA reliable?
The price and inventory of ZXRE1004EFTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE1004EFTA is usually 5 days.
3.What payment methods are accepted for ZXRE1004EFTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE1004EFTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXRE1004EFTA?
ZXRE1004EFTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXRE1004EFTA 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 ZXRE1004EFTA?
For technical support, including ZXRE1004EFTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE1004EFTA requirements.
6.How does Aetrix verify that ZXRE1004EFTA is sourced from the original manufacturer or authorized distributors?
All ZXRE1004EFTA 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 ZXRE1004EFTA meets industry standards.
7.What is the process for return or replacement of ZXRE1004EFTA?
All ZXRE1004EFTA units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE1004EFTA, 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 ZXRE1004EFTA part is unused and in its original packaging.
Return procedure for ZXRE1004EFTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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