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Diodes Incorporated ZXRE1004FN8TA
- Part No.:
- ZXRE1004FN8TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ZXRE1004FN8TA.pdf
- Description:
- IC VREF SHUNT 3% 8SOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,976
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Product details
Overview
ZXRE1004FN8TA 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 maintains stability with capacitive loads, making it ideal for precision low-power analog signal conditioning in portable instrumentation and battery-powered data acquisition systems.
For engineers reviewing the ZXRE1004FN8TA datasheet, ZXRE1004FN8TA pinout, ZXRE1004FN8TA application, or ZXRE1004FN8TA equivalent, key selection criteria include ultra-low quiescent current, tight thermal drift, unconditional stability under varying load capacitance, and compatibility with legacy reference footprints including REF1004 and LM385.
Technical Context
The ZXRE1004FN8TA implements a two-terminal shunt-mode bandgap reference architecture, requiring an external current source to bias the device into regulation. Its internal circuitry achieves stable 1.22V output across –40°C to +85°C ambient, with minimal sensitivity to supply current variation between 8µA and 20mA.
It features unconditionally stable operation up to 10nF capacitive load without external compensation, enabled by optimized internal dynamic impedance (0.2Ω typical at 1mA) and low wideband noise (60µVrms, 10Hz–10kHz). The device's reverse breakdown topology eliminates need for dedicated VREF and GND pins, simplifying layout in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.22 V ±1% at 25°C - defines precise DC bias point for ADC/DAC reference rails and sensor excitation circuits |
| Knee Current | 4 µA typical - enables operation from microamp-level bias sources, extending battery life in always-on monitoring nodes |
| Temp Coefficient | 20 ppm/°C typical - ensures ≤2.5 mV drift over 0–70°C, critical for 12-bit+ measurement accuracy |
| Operating Current | 8 µA to 20 mA - supports wide dynamic range of load conditions without regulation loss or instability |
| Dynamic Impedance | 0.2 Ω typical at 1 mA - minimizes output voltage perturbation during transient load steps in precision analog front-ends |
| Noise (10Hz–10kHz) | 60 µVrms - limits added uncertainty in high-resolution digitization paths, e.g., 16-bit SAR ADC references |
Pinout & Package
SOT23-3 package (JEDEC MO-203AA), 2.80 × 2.64 × 1.12 mm body, gull-wing leads, RoHS-compliant, halogen-free "Green" construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode (Input Current Terminal) | Current sink node - connects to positive supply via series resistor; sets operating point for regulation |
| Pin 2 | Cathode (Output Reference Terminal) | Stable 1.22V output node - referenced to system ground; supplies reference voltage to downstream circuitry |
| Pin 3 | NC / Floating | No internal connection - left unconnected per datasheet; not used for regulation or trimming |
Key Features
| Feature | Design Value |
|---|---|
| Shunt-mode architecture | Eliminates need for dedicated VCC/GND pins - reduces PCB routing complexity and supports floating reference configurations |
| Unconditional stability | Maintains regulation with ≥10nF capacitive load - removes requirement for external compensation networks in sensor interface filters |
| Low knee current | 4µA typical - enables use with high-value bias resistors (>1MΩ), minimizing power draw in energy-harvesting applications |
| Tight thermal drift | 20ppm/°C typical - delivers <±0.9mV error over industrial temperature range, supporting 12-bit system accuracy without calibration |
Applications
| Battery-Powered Data Loggers | Precision Portable Multimeters |
|---|---|
Use Scenario: Continuous low-power voltage measurement in remote environmental sensors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 1.22V reference for 14-bit sigma-delta ADC conversion. Use Value: 4µA knee current extends operational lifetime beyond 5 years on CR2032; 20ppm/°C TC avoids field recalibration across seasonal temperature swings. | Use Scenario: Handheld multimeter requiring accurate DC voltage ranges from 100mV to 10V with auto-ranging. IC Role / Device Role / Timing Role: Primary reference for programmable gain amplifier and ADC reference divider network. Use Value: 1% initial tolerance and low dynamic impedance ensure ≤0.1% full-scale error across all ranges without trimming; SOT23 footprint saves board area in compact chassis. |
| Wireless Sensor Node Analog Front-End | Industrial Loop-Powered Transmitters |
Use Scenario: Sub-100µA active current budget node measuring thermistor and RTD signals over 0–70°C. IC Role / Device Role / Timing Role: Bias reference for ratiometric sensor excitation and ADC reference in ultra-low-power SoC subsystem. Use Value: Stable regulation down to 8µA supply current allows direct integration with MCU's internal LDO output; capacitive load immunity simplifies EMI filtering design. | Use Scenario: 4–20mA transmitter with HART modulation requiring stable internal reference for DAC and current-sense amplifier. IC Role / Device Role / Timing Role: Precision shunt reference establishing 1.22V baseline for 16-bit DAC output scaling and loop current calibration. Use Value: 0.2Ω dynamic impedance prevents reference droop during HART frequency bursts; 75ppm/°C max TC meets IEC 61293 Class 1.0 accuracy requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431AIDBZR | 2.5V adjustable reference (min 1.24V), 80µA typical IQ, 50ppm/°C TC | Requires external resistor divider; higher quiescent current limits ultra-low-power use | Preferred when adjustable output or higher voltage is needed; not drop-in for fixed 1.22V designs |
| LM385BZ-1.2 | 1.235V nominal, 10µA knee current, 50ppm/°C TC, TO-92 package | Larger through-hole footprint; higher knee current increases bias resistor power dissipation | Acceptable where board space permits and 1.235V offset is tolerable; lacks SOT23 surface-mount advantage |
Compared with TLVH431AIDBZR and LM385BZ-1.2, the ZXRE1004FN8TA delivers the lowest knee current (4µA vs. 10–80µA) and best thermal stability (20ppm/°C typical) in a miniature SOT23 package-making it uniquely suited for space- and energy-constrained portable instrumentation where fixed 1.22V is required.
Availability
ZXRE1004FN8TA is available at Aetrix Electronics and suitable for battery-powered equipment, portable instrumentation, and precision data acquisition systems requiring stable component supply with long-term lifecycle support.
Supply support for ZXRE1004FN8TA 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, manufacturing, and sales operations across Asia, Europe, and North America.
The ZXRE1004 belongs to Diodes' precision voltage reference product line, engineered specifically for ultra-low-power, high-stability analog signal chains in portable and battery-operated systems.
FAQ
What is the minimum operating current for reliable regulation?
The ZXRE1004FN8TA achieves stable regulation at a minimum knee current of 4µA typical, with guaranteed operation down to 8µA across the full –40°C to +85°C temperature range. Below 8µA, output voltage may deviate beyond specified tolerance due to insufficient internal bias current.
Can this device drive a 10nF capacitive load without oscillation?
Yes-the ZXRE1004FN8TA is unconditionally stable with capacitive loads up to at least 10nF, as confirmed in the datasheet's Typical Characteristics section and stability test conditions. No external series resistance or compensation components are required for such loads.
Is Pin 3 electrically connected internally?
No-Pin 3 in the SOT23 package is not connected to any internal circuitry and must be left floating. The device functions correctly with only Pins 1 (anode) and 2 (cathode) connected; connecting Pin 3 provides no functional benefit and may risk mechanical stress on the lead frame.
How does the 1% tolerance affect system-level accuracy in a 12-bit ADC design?
With a 1% initial tolerance at 25°C and 20ppm/°C typical TC, the ZXRE1004FN8TA contributes ≤±12 LSB error (of 4096 total) in a 12-bit system over 0–70°C-well within the ±½ LSB threshold required for monotonicity, assuming no other error sources dominate the signal chain.
ZXRE1004FN8TA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- 8-SO
ZXRE1004FN8TA FAQ
1.How can I place an order for ZXRE1004FN8TA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXRE1004FN8TA 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 ZXRE1004FN8TA reliable?
The price and inventory of ZXRE1004FN8TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE1004FN8TA is usually 5 days.
3.What payment methods are accepted for ZXRE1004FN8TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE1004FN8TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXRE1004FN8TA?
ZXRE1004FN8TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXRE1004FN8TA 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 ZXRE1004FN8TA?
For technical support, including ZXRE1004FN8TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE1004FN8TA requirements.
6.How does Aetrix verify that ZXRE1004FN8TA is sourced from the original manufacturer or authorized distributors?
All ZXRE1004FN8TA 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 ZXRE1004FN8TA meets industry standards.
7.What is the process for return or replacement of ZXRE1004FN8TA?
All ZXRE1004FN8TA units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE1004FN8TA, 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 ZXRE1004FN8TA part is unused and in its original packaging.
Return procedure for ZXRE1004FN8TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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