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Diodes Incorporated ZXRE330ESA-7
- Part No.:
- ZXRE330ESA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZXRE330ESA-7.pdf
- Description:
- IC VREF SHUNT 2% SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:5,088
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Product details
Overview
ZXRE330ESA-7 from Diodes Incorporated is a precision micropower shunt voltage reference delivering a stable 3.3V output with ±2% initial tolerance at +25°C, 20ppm/°C typical temperature coefficient, and operation down to 1µA cathode current. It features low 55µVRMS noise (10Hz–10kHz), high capacitive load tolerance, and is housed in a RoHS-compliant SOT23 package for space-constrained battery-powered instrumentation.
For engineers reviewing the ZXRE330ESA-7 datasheet, ZXRE330ESA-7 pinout, ZXRE330ESA-7 application, or ZXRE330ESA-7 equivalent, key selection criteria include knee current behavior below 1µA, thermal hysteresis of 0.08%, off-state reverse current ≤1µA over –40°C to +85°C, and compatibility with no-output-capacitor configurations in low-power analog signal chains.
Technical Context
The ZXRE330ESA-7 operates as a two-terminal shunt reference, requiring only an external series resistor to regulate voltage across variable loads. Its sharp knee characteristic enables stable regulation even at cathode currents as low as 1µA, with minimal voltage drift (±0.6mV) across 2µA–100µA operating range.
It maintains stability without output capacitance due to intrinsic low dynamic impedance (2Ω at 2mA, 120Hz) and exhibits excellent long-term stability (<100ppm after 1000 hours). The device's thermal hysteresis (0.08%) and tight tempco ensure accuracy in portable equipment subject to ambient cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V nominal; maintains regulation across 1µA–5mA cathode current range |
| Initial Tolerance | ±2% at +25°C; defines maximum deviation before tempco and aging effects |
| Tempco | ±20ppm/°C typical (–40°C to +85°C); ensures <±0.55mV/°C drift in precision references |
| Noise | 55µVRMS (10Hz–10kHz); supports low-noise ADC biasing and sensor excitation |
| Min Operating Current | 1µA; enables ultra-low-power wake-up circuits and energy-harvesting systems |
| Off-State Current | ≤1µA at VR×0.9; guarantees near-zero quiescent draw when reference is inactive |
| Dynamic Impedance | 2Ω at 2mA, 120Hz; minimizes load-induced voltage perturbation in dynamic conditions |
Pinout & Package
The ZXRE330ESA-7 is supplied in a 3-pin SOT23 package. Pin 3 is internally connected to the die substrate and must be left floating or tied to pin 2 (cathode) per layout guidelines. This configuration avoids unintended parasitic conduction paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground reference terminal | Connected to system GND; defines 0V reference for 3.3V output at cathode |
| Cathode (Pin 2) | Regulated 3.3V output node | Delivers stable voltage to load; requires external series resistor (RS) from supply |
| Substrate Tie (Pin 3) | Internal die attachment point | Must float or connect to pin 2; incorrect connection causes regulation failure or instability |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into space-limited PCBs without stability-compromising external components |
| Low 1µA minimum operating current | Supports microamp-level power budgets in coin-cell or energy-harvesting applications |
| 55µVRMS broadband noise | Meets SNR requirements for 16-bit+ SAR ADCs and precision sensor front-ends |
| 0.08% thermal hysteresis | Reduces calibration drift in field-deployed instruments undergoing repeated temperature cycles |
| ±2% initial tolerance (E-grade) | Provides cost-optimized accuracy for non-critical biasing while retaining full tempco performance |
Applications
| Battery-Powered Instrumentation | Precision Data Acquisition |
|---|---|
|
Use Scenario: Handheld multimeter using coin-cell supply and 24-bit delta-sigma ADC. IC Role / Device Role / Timing Role: Shunt reference providing stable 3.3V reference for ADC internal VREF and analog front-end biasing. Use Value: 1µA min current enables >10-year battery life; 55µVRMS noise preserves ENOB in high-resolution measurements. |
Use Scenario: Industrial sensor node with RTD bridge and isolated SPI interface. IC Role / Device Role / Timing Role: Primary voltage reference for bridge excitation and ADC conversion reference. Use Value: ±20ppm/°C tempco limits gain error to <0.02% over –40°C to +85°C operating range. |
| Portable Communications Devices | Low-Power Voltage Clamping |
|
Use Scenario: Bluetooth LE audio earbud with integrated Li-ion charger and analog microphone preamp. IC Role / Device Role / Timing Role: Reference for microphone bias and ADC reference in ultra-low-quiescent PMIC subsystem. Use Value: Off-state current ≤1µA prevents battery drain during sleep mode; SOT23 footprint saves board area. |
Use Scenario: USB-C port protection circuit limiting VBUS overvoltage during hot-plug events. IC Role / Device Role / Timing Role: Precision shunt clamp activated via external transistor to hold VBUS at 3.3V during fault. Use Value: Sharp knee characteristic ensures fast, repeatable clamping onset at exactly 3.3V ±2% without overshoot. |
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 | 2.5V fixed reference; ±0.5% initial tolerance; higher 60µA min cathode current | Requires redesign of RS and load network; unsuitable for sub-10µA systems | Select when 2.5V output and tighter initial tolerance outweigh micropower needs |
| LM4040C33IDBZR | 3.3V reference; ±0.5% tolerance; 75µVRMS noise; 60µA min current; TO-236 package | Higher noise and current limit its use in energy-harvesting or 16-bit+ measurement systems | Choose when higher initial accuracy is prioritized over ultra-low IQ and noise |
Compared with TLVH431ACDBVR and LM4040C33IDBZR, the ZXRE330ESA-7 uniquely supports true micropower operation (1µA min) with low noise and SOT23 footprint-making it optimal for battery life–critical, high-resolution analog systems where 3.3V ±2% accuracy suffices.
Availability
ZXRE330ESA-7 is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable communications devices, and precision data acquisition systems requiring stable component supply with guaranteed long-term continuity.
Supply support for ZXRE330ESA-7 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 analog portfolio, engineered specifically for micropower shunt reference applications demanding low knee current, high stability, and robust capacitive-load immunity in compact portable systems.
FAQ
What is the minimum cathode current required for regulation in ZXRE330ESA-7?
The ZXRE330ESA-7 maintains regulation at a minimum cathode current of 1µA, verified across –40°C to +85°C ambient. Below this, the device enters off-state with ≤1µA leakage at 90% of VREF. This enables use in wake-up circuits and energy-harvesting nodes where average current must remain sub-microamp.
Can ZXRE330ESA-7 operate without an output capacitor?
Yes-the ZXRE330ESA-7 is explicitly designed for capacitor-free operation. Its internal architecture provides inherent stability with capacitive loads up to 10nF, eliminating the need for external bypass capacitors that would increase board area and cost in space-constrained designs.
How does pin 3 function in the SOT23 package of ZXRE330ESA-7?
In the SOT23 package, pin 3 is electrically connected to the silicon die substrate. Per Diodes' layout guidance, it must either be left unconnected (floating) or tied directly to pin 2 (cathode). Connecting pin 3 to pin 1 (anode) or leaving it unterminated in high-noise environments may compromise regulation stability.
What is the long-term stability specification for ZXRE330ESA-7?
The ZXRE330ESA-7 exhibits ≤100ppm non-cumulative long-term stability after 1000 hours of operation at 100µA cathode current and +25°C ambient. This value reflects parametric drift under accelerated stress and supports recalibration intervals exceeding 5 years in deployed instrumentation.
ZXRE330ESA-7 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:
- Active
- 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:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ZXRE330ESA-7 FAQ
1.How can I place an order for ZXRE330ESA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXRE330ESA-7 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 ZXRE330ESA-7 reliable?
The price and inventory of ZXRE330ESA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE330ESA-7 is usually 5 days.
3.What payment methods are accepted for ZXRE330ESA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE330ESA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXRE330ESA-7?
ZXRE330ESA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXRE330ESA-7 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 ZXRE330ESA-7?
For technical support, including ZXRE330ESA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE330ESA-7 requirements.
6.How does Aetrix verify that ZXRE330ESA-7 is sourced from the original manufacturer or authorized distributors?
All ZXRE330ESA-7 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 ZXRE330ESA-7 meets industry standards.
7.What is the process for return or replacement of ZXRE330ESA-7?
All ZXRE330ESA-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE330ESA-7, 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 ZXRE330ESA-7 part is unused and in its original packaging.
Return procedure for ZXRE330ESA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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