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Diodes Incorporated ZXRE125EN8TA
- Part No.:
- ZXRE125EN8TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ZXRE125EN8TA.pdf
- Description:
- IC VREF SHUNT 2% 8SOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,072
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Product details
Overview
ZXRE125EN8TA from Diodes Incorporated is a micropower bandgap voltage reference IC delivering a precise 1.220 V output with ±2% initial tolerance, 20 ppm/°C typical temperature coefficient, and stable operation from 4 µA to 20 mA supply current - used in portable instrumentation and battery-powered precision analog signal chains.
For engineers reviewing the ZXRE125EN8TA datasheet, ZXRE125EN8TA pinout, ZXRE125EN8TA application, or ZXRE125EN8TA equivalent, key selection factors include knee current (4 µA), load-capacitance immunity, SOT23-3 package compatibility, and 0.2 Ω dynamic impedance at 1 mA for low-noise sensing and ADC biasing.
Technical Context
The ZXRE125EN8TA implements a two-terminal shunt-mode bandgap reference architecture, operating as a precision current sink with reverse breakdown behavior. It requires no external components for basic operation and maintains regulation across capacitive loads up to 10 nF without oscillation.
Its thermal design achieves 20 ppm/°C typical TC over –40°C to +85°C via curvature-compensated bandgap core and trimmed resistor network. The device's 60 µVrms wideband noise (10 Hz–10 kHz) supports high-resolution data acquisition systems where reference stability directly impacts ENOB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.220 V ±2% at 100 µA - defines absolute accuracy of downstream ADCs or DACs |
| Temp Coefficient | 20 ppm/°C typical - ensures ≤2.5 mV drift over full industrial temperature range |
| Knee Current | 4 µA - enables ultra-low-power wake-up circuits and energy-harvesting sensors |
| Dynamic Impedance | 0.2 Ω at 1 mA - minimizes load-induced voltage error in varying-current applications |
| Wideband Noise | 60 µVrms (10 Hz–10 kHz) - preserves SNR in 16-bit+ data converters |
| Capacitive Load Stability | Unconditionally stable - eliminates need for series resistance or compensation networks |
| Operating Current Range | 4 µA to 20 mA - supports both standby and active measurement modes in single-supply systems |
Pinout & Package
SOT23-3 package: 3-pin surface-mount plastic case with gull-wing leads, 1.9 mm pitch, 2.8 mm × 2.6 mm footprint, and 1.12 mm max height - optimized for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Reference Cathode Connection | Connected to system ground or low-impedance return path; sinks regulated current |
| Pin 2 (Cathode) | Reference Output Terminal | Provides 1.220 V reference voltage; connects to ADC REF+, op-amp non-inverting input, or bias node |
| Pin 3 (NC) | No Connect / Floating | Internally unconnected; must remain unconnected per datasheet to avoid parametric shift |
Key Features
| Feature | Design Value |
|---|---|
| Shunt-mode topology | Enables direct connection to high-side supplies without series pass transistor or LDO overhead |
| 0.5% to 3% tolerance options | ZXRE125EN8TA selects ±2% grade (E-grade), balancing cost and precision for mid-tier instrumentation |
| Green molding compound | Halogen-free (Br/Sb-free) packaging compliant with RoHS and JEDEC J-STD-020 reflow profiles |
| Low knee current | 4 µA startup threshold allows use with nanoampere-level current sources in energy harvesting nodes |
| High current capability | 20 mA max sink current supports driving multiple parallel reference inputs or low-RLOAD buffers |
Applications
| Battery-Powered Sensors | Precision Data Acquisition |
|---|---|
Use Scenario: Low-power environmental sensor node powered by coin cell or energy harvester. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 1.220 V bias for sigma-delta ADC and analog front-end. Use Value: 4 µA knee current extends battery life beyond 5 years; 20 ppm/°C TC avoids calibration drift across seasonal temperature swings. | Use Scenario: Portable handheld multimeter with 16-bit SAR ADC and auto-ranging front-end. IC Role / Device Role / Timing Role: Precision reference source for ADC full-scale calibration and offset nulling circuitry. Use Value: 0.2 Ω dynamic impedance prevents gain error under dynamic load; 60 µVrms noise enables true 16-bit resolution. |
| Portable Medical Monitors | Industrial Loop-Powered Transmitters |
Use Scenario: Wearable ECG patch with analog lead-off detection and low-noise amplification. IC Role / Device Role / Timing Role: Stable reference for instrumentation amplifier common-mode setting and ADC reference rail. Use Value: Unconditional stability with 10 nF bypass caps eliminates risk of oscillation in compact flex PCB layout. | Use Scenario: 4–20 mA loop transmitter with integrated microcontroller and HART modem. IC Role / Device Role / Timing Role: Reference for current-sense amplifier and DAC-controlled output stage calibration. Use Value: ±2% initial tolerance and 75 ppm/°C max TC ensure compliance with IEC 61000-4-5 surge immunity test margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431ACDBVR | Adjustable output (2.5 V min), higher 80 µA min cathode current, 50 ppm/°C TC | Requires external resistors; less suitable for fixed-voltage, ultra-low-power use | Choose when programmability or higher output voltage is required |
| MAX6012AEUR+T | Fixed 1.25 V, 30 ppm/°C TC, 10 µA min operating current, SOT23-3 | Higher knee current limits use in sub-10 µA systems; tighter 0.1% tolerance available | Choose when 1.25 V nominal and tighter initial accuracy outweigh micropower needs |
Compared with TLVH431ACDBVR and MAX6012AEUR+T, ZXRE125EN8TA uniquely combines 1.220 V fixed output, 4 µA knee current, and unconditional capacitive stability - making it optimal for space- and power-constrained analog sensing where reference simplicity and low drift are critical.
Availability
ZXRE125EN8TA is available at Aetrix Electronics and suitable for battery-powered sensors, precision data acquisition systems, and portable medical monitors requiring stable component supply with guaranteed long-term availability.
Supply support for ZXRE125EN8TA 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-reliability, energy-efficient components for industrial, computing, and consumer markets.
The ZXRE125 series belongs to Diodes' precision reference product line, engineered specifically for ultra-low-power, space-constrained analog signal conditioning in portable and battery-operated equipment.
FAQ
Is ZXRE125EN8TA a three-terminal or two-terminal device?
ZXRE125EN8TA is a two-terminal shunt voltage reference: Pin 1 (anode) connects to ground, Pin 2 (cathode) delivers the 1.220 V reference, and Pin 3 is internally unconnected. It functions like a precision Zener diode, sinking current to maintain regulated voltage across its terminals.
Can ZXRE125EN8TA drive a 10 kΩ load directly?
Yes - at 1.220 V output, a 10 kΩ load draws 122 µA, well within the device's 4 µA to 20 mA operating range. Its 0.2 Ω dynamic impedance ensures <0.025 mV error under this load, preserving accuracy without external buffering.
What is the maximum capacitive load the ZXRE125EN8TA can drive without instability?
The ZXRE125EN8TA is unconditionally stable with capacitive loads up to at least 10 nF, as confirmed in Diodes' DS32170 Rev. 8-2 datasheet. No series resistor or isolation is needed, simplifying layout in noise-sensitive data acquisition designs.
Does ZXRE125EN8TA meet RoHS and halogen-free requirements?
Yes - ZXRE125EN8TA uses green molding compound with zero bromine and antimony, complying with RoHS Directive 2011/65/EU and JEDEC JS-709C halogen-free standards. The SOT23 package is also lead-free and compatible with standard reflow profiles.
ZXRE125EN8TA 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:
- ±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:
- 8-SO
ZXRE125EN8TA FAQ
1.How can I place an order for ZXRE125EN8TA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXRE125EN8TA 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 ZXRE125EN8TA reliable?
The price and inventory of ZXRE125EN8TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE125EN8TA is usually 5 days.
3.What payment methods are accepted for ZXRE125EN8TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE125EN8TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXRE125EN8TA?
ZXRE125EN8TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXRE125EN8TA 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 ZXRE125EN8TA?
For technical support, including ZXRE125EN8TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE125EN8TA requirements.
6.How does Aetrix verify that ZXRE125EN8TA is sourced from the original manufacturer or authorized distributors?
All ZXRE125EN8TA 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 ZXRE125EN8TA meets industry standards.
7.What is the process for return or replacement of ZXRE125EN8TA?
All ZXRE125EN8TA units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE125EN8TA, 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 ZXRE125EN8TA part is unused and in its original packaging.
Return procedure for ZXRE125EN8TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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