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Diodes Incorporated ZXRE330EV-A
- Part No.:
- ZXRE330EV-A
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
ZXRE330EV-A.pdf
- Description:
- IC VREF SHUNT 2% TO92
- Quantity:
- Payment:
- Shipping:
Inventory:1,993
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Product details
Overview
ZXRE330EV-A from Diodes Incorporated is a precision 3.3V shunt voltage reference in TO92 package, designed for low-knee-current operation with ±2% initial tolerance at +25°C, 20ppm/°C typical temperature coefficient, and stable performance from 1µA to 5mA reverse current. It serves as a compact, capacitor-free reference in battery-powered instrumentation and portable power supplies.
For engineers reviewing the ZXRE330EV-A datasheet, ZXRE330EV-A pinout, ZXRE330EV-A application, or ZXRE330EV-A equivalent, key selection criteria include its minimal operating current (1µA), off-state leakage (<1µA at –40°C to +85°C), noise (55µVRMS, 10Hz–10kHz), thermal hysteresis (0.08%), and TO92 mechanical compatibility with legacy designs.
Technical Context
The ZXRE330EV-A operates as a two-terminal shunt reference, requiring only an external series resistor to regulate output voltage. Its sharp knee characteristic enables reliable regulation down to 1µA, with dynamic impedance of 2Ω at 2mA - critical for low-current sensing and precision clamping.
It maintains stability across –40°C to +85°C ambient range without output capacitance, supported by low thermal hysteresis (0.08%) and tight long-term drift (<100ppm over 1000 hours). The TO92 package integrates die attachment to pin 2, mandating pin 2 be left floating or tied to pin 1 per layout guidance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 3.3V nominal; maintains stable 3.3V output under 1µA–5mA reverse current |
| Initial Tolerance | ±2% at +25°C (ZXRE330E grade); defines max deviation before temp/aging effects |
| Temp Coefficient | ±20ppm/°C typ (–40°C to +85°C); ensures <±0.55mV/°C drift in precision scaling |
| Noise (10Hz–10kHz) | 55µVRMS; enables high-resolution ADC biasing without added filtering |
| Min Operating Current | 1µA; supports ultra-low-power wake-up circuits and energy-harvesting systems |
| Off-State Leakage | ≤1µA at –40°C to +85°C and VR = 0.9 × VREF; prevents battery drain in standby |
| Dynamic Impedance | 2Ω at 2mA, 120Hz; minimizes load-induced voltage shift in varying current conditions |
Pinout & Package
Package: TO92 - axial-leaded, through-hole, 3-pin plastic package with die attached to pin 2; requires pin 2 to be left floating or connected to pin 1 per mechanical design note.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground node | Common return path; must be tied to system ground for stable reference potential |
| Cathode (Pin 2) | Output voltage node | Provides regulated 3.3V; electrically bonded to die substrate in TO92; must float or connect to pin 1 |
| Pin 3 | Not connected (NC) | No internal connection; left unconnected per datasheet layout requirement |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation without external bypass cap - reduces BOM count and PCB area in space-constrained designs |
| Low 1µA minimum operating current | Enables use in micropower systems where supply current is limited, such as coin-cell IoT sensors |
| 55µVRMS broadband noise | Supports 16-bit+ data acquisition without additional low-noise post-regulation stages |
| ±2% initial accuracy at +25°C | Meets cost-sensitive industrial sensor calibration requirements without factory trimming |
| Tolerant of capacitive loads | Eliminates risk of oscillation when driving ADC input caps or long PCB traces |
Applications
| Battery-Powered Instrumentation | Precision Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter using coin-cell battery and 24-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Shunt reference providing stable 3.3V reference for ADC voltage scaling and analog front-end biasing. Use Value: 1µA min operating current extends battery life beyond 5 years; ±2% tolerance allows single-point calibration at room temperature. | Use Scenario: Portable environmental sensor node measuring temperature/humidity with microamp-level sleep current. IC Role / Device Role / Timing Role: Reference source for ratiometric sensor excitation and ADC reference rail in low-duty-cycle sampling. Use Value: 55µVRMS noise ensures <0.01% measurement uncertainty; TO92 package simplifies manual rework during prototyping. |
| Low-Power Voltage Clamp | Portable Communications Device Power Monitoring |
Use Scenario: Overvoltage protection circuit limiting Li-ion charger output to 3.3V ±2% during fault conditions. IC Role / Device Role / Timing Role: Precision clamp element in shunt-based foldback limiter, activated via series resistor and MOSFET gate control. Use Value: Sharp knee at 1µA ensures fast turn-on below threshold; 20ppm/°C TC avoids thermal drift-induced false trips. | Use Scenario: Battery fuel gauge IC in Bluetooth headset requiring accurate VBAT monitoring across –10°C to +45°C. IC Role / Device Role / Timing Role: Stable reference for ADC measuring battery divider output, enabling SOC estimation within ±1.5% error. Use Value: 0.08% thermal hysteresis prevents hysteresis-induced SOC jumps during temperature cycling; TO92 fits legacy repair workflows. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACLP | 2.5V fixed reference; requires external resistive divider for 3.3V; higher 70µA cathode current | Needs redesign of feedback network; unsuitable for sub-10µA systems | Select if existing design uses TL431 footprint and 2.5V base reference is acceptable |
| LM4040C33IDBZR | 3.3V shunt reference; ±0.5% initial tolerance; SOT23-only; 60µVRMS noise | Higher accuracy but no TO92 option; incompatible with through-hole layouts | Select for improved accuracy where SOT23 assembly is available and tighter tolerance justifies cost premium |
Compared with TL431ACLP and LM4040C33IDBZR, the ZXRE330EV-A uniquely combines TO92 through-hole compatibility, 1µA minimum current, and ±2% tolerance - making it optimal for legacy-repair, ultra-low-power, and manually assembled instrumentation where footprint and quiescent current dominate selection.
Availability
ZXRE330EV-A is available at Aetrix Electronics and suitable for battery-powered instrumentation, precision data acquisition systems, and low-power voltage clamp circuits requiring stable component supply with long-lifecycle support.
Supply support for ZXRE330EV-A 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 ZXRE330 series belongs to Diodes' precision voltage reference product line, engineered specifically for micropower, capacitor-free operation in portable and battery-critical applications - emphasizing low knee current, wide temperature stability, and mechanical flexibility across SOT23 and TO92 packages.
FAQ
What is the correct pin configuration for ZXRE330EV-A in TO92 package?
In the TO92 package, the ZXRE330EV-A has its die attached to pin 2 (cathode), creating an internal bond between pin 1 (anode) and pin 2. Therefore, pin 2 must either be left floating or connected directly to pin 1. Pin 3 is not internally connected and must remain unconnected. This configuration is mandatory to avoid shorting or instability.
Can ZXRE330EV-A operate without an output capacitor?
Yes - the ZXRE330EV-A is explicitly designed for capacitor-free operation. Its internal architecture provides inherent stability across capacitive loads up to several nanofarads, eliminating the need for external bypass capacitors. This reduces bill-of-materials cost and PCB area, especially valuable in space-constrained portable designs.
What is the maximum reverse current rating for ZXRE330EV-A?
The absolute maximum continuous reverse current for ZXRE330EV-A is 10mA. Operation above this level risks permanent damage. For reliable long-term performance, the recommended operating range is 1µA to 5mA - where the device delivers specified tolerance, temperature coefficient, and noise performance per datasheet conditions.
How does ZXRE330EV-A compare to ZXRE330ASA-7 in terms of accuracy and package?
ZXRE330EV-A offers ±2% initial tolerance in TO92 package, while ZXRE330ASA-7 provides ±0.5% tolerance in SOT23. The EV-A variant prioritizes through-hole serviceability and ultra-low-current operation over tight accuracy; the ASA-7 variant targets surface-mount, high-accuracy applications. They are not pin-compatible due to differing packages and terminal assignments.
ZXRE330EV-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Series:
- -
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±2%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 55µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 2 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92
ZXRE330EV-A FAQ
1.How can I place an order for ZXRE330EV-A through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXRE330EV-A 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 ZXRE330EV-A reliable?
The price and inventory of ZXRE330EV-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE330EV-A is usually 5 days.
3.What payment methods are accepted for ZXRE330EV-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE330EV-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXRE330EV-A?
ZXRE330EV-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXRE330EV-A 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 ZXRE330EV-A?
For technical support, including ZXRE330EV-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE330EV-A requirements.
6.How does Aetrix verify that ZXRE330EV-A is sourced from the original manufacturer or authorized distributors?
All ZXRE330EV-A 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 ZXRE330EV-A meets industry standards.
7.What is the process for return or replacement of ZXRE330EV-A?
All ZXRE330EV-A units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE330EV-A, 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 ZXRE330EV-A part is unused and in its original packaging.
Return procedure for ZXRE330EV-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZXRE330EV-A Tags
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