My Inquiry
My Account
Diodes Incorporated ZXRE330ASA-7
- Part No.:
- ZXRE330ASA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZXRE330ASA-7.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:34,858
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ZXRE330ASA-7 from Diodes Incorporated is a precision 3.3V shunt voltage reference in SOT23 package, featuring ±0.5% initial tolerance at +25°C, 20ppm/°C typical temperature coefficient, 55µVRMS noise (10Hz–10kHz), 1µA to 5mA operating current range, and stable operation with capacitive loads - used in battery-powered instrumentation and low-current voltage clamping circuits.
For engineers reviewing the ZXRE330ASA-7 datasheet, ZXRE330ASA-7 pinout, ZXRE330ASA-7 application, or ZXRE330ASA-7 equivalent, key selection criteria include knee current behavior, load-capacitance immunity, long-term stability (≤100ppm over 1000 hours), thermal hysteresis (0.08%), and compatibility with high-impedance sensing nodes in portable power management systems.
Technical Context
The ZXRE330ASA-7 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 off-state reverse current ≤1µA at VR × 0.9.
It maintains ±0.6mV voltage drift across –40°C to +85°C at 100µA bias and exhibits <2Ω dynamic impedance at 2mA/120Hz - enabling high-accuracy feedback in low-power ADC references and sensor excitation circuits without output capacitor stabilization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 3.3V nominal; tight ±0.5% tolerance at +25°C ensures minimal calibration overhead in precision analog front-ends. |
| Tempco | ±20ppm/°C (typ); supports <±2.6mV total drift over –40°C to +85°C at 100µA, critical for unheated field instruments. |
| Noise | 55µVRMS (10Hz–10kHz); low enough to avoid degrading 16-bit SAR ADC performance in portable data loggers. |
| Operating Current | 1µA to 5mA; ultra-low 1µA minimum enables operation from microampere-level energy harvesters or coin-cell sources. |
| Dynamic Impedance | 2Ω at 2mA/120Hz; ensures stable regulation under transient load steps in battery-monitoring comparators. |
| Long-Term Stability | ≤100ppm over 1000 hours; reduces recalibration frequency in sealed industrial sensors. |
| Thermal Hysteresis | 0.08%; minimizes repeatability error during thermal cycling in automotive cabin modules. |
Pinout & Package
SOT23-3 package (JEDEC TO-236AB); die attached to pin 3, requiring pin 3 to be left floating or tied to pin 2 per layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground node | Common return path for cathode current; must connect to system ground with low-impedance trace. |
| Cathode (Pin 2) | Output reference terminal | Provides regulated 3.3V; connects to feedback node of op-amp or ADC reference input. |
| Die Attach (Pin 3) | Internal substrate connection | Electrically tied to pin 2; must not be driven independently - floating or shorted to pin 2 only. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable with ≥100nF capacitive loads due to internal compensation - eliminates BOM cost and board space for decoupling cap. |
| Low knee current | Maintains regulation down to 1µA - enables use in ultra-low-power wake-up circuits and energy-harvesting systems. |
| High accuracy grade | ±0.5% initial tolerance (ZXRE330A) - reduces factory trim time and improves yield in medical sensor calibrations. |
| Capacitive load tolerance | Immune to instability up to 10µF - supports direct connection to ADC reference inputs with on-chip sampling capacitors. |
| Lead-free & green | Fully RoHS 3 compliant, halogen- and antimony-free - meets IPC-J-STD-609 Class 3 requirements for automotive and medical end equipment. |
Applications
| Battery-Powered Instrumentation | Precision Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter with 200kSPS SAR ADC and coin-cell supply. IC Role / Device Role / Timing Role: Shunt reference providing stable 3.3V reference for ADC and analog front-end gain stages. Use Value: 55µVRMS noise and ±20ppm/°C tempco ensure <±0.01% measurement accuracy across 0–40°C ambient range without active temperature compensation. |
Use Scenario: Isolated industrial sensor node measuring strain gauge bridge output. IC Role / Device Role / Timing Role: Excitation reference for ratiometric bridge sensing and ADC reference voltage source. Use Value: 1µA minimum operating current allows continuous monitoring during sleep mode, extending 10-year battery life in wireless condition monitoring systems. |
| Portable Communications Devices | Low-Current Voltage Clamps |
Use Scenario: Bluetooth LE audio transmitter with integrated DAC and RF PA bias control. IC Role / Device Role / Timing Role: Reference for DAC full-scale setting and PA bias voltage generation. Use Value: 0.08% thermal hysteresis prevents audible distortion during repeated power-on/power-off cycles in consumer earbuds. |
Use Scenario: Overvoltage protection circuit for Li-ion battery fuel gauge IC. IC Role / Device Role / Timing Role: Precision clamp threshold set to 3.3V ±0.5% to prevent false fault triggering. Use Value: Sharp knee characteristic ensures clean turn-on at exactly 3.3V, eliminating ambiguity between normal operation and overvoltage events. |
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 fixed reference; ±0.5% tolerance; higher 80µA min operating current; 3-pin adjustable topology. | Requires external resistors to set 3.3V; unsuitable for ultra-low-power (<10µA) systems. | Select when adjustable output or higher sink current (>100mA) is needed; avoid where 1µA knee current is mandatory. |
| REF3033AIDBZR | 3.3V series reference; ±0.2% tolerance; 50µA quiescent current; requires output capacitor. | Three-terminal architecture increases PCB area and BOM count; sensitive to output capacitance ESR. | Prefer for highest initial accuracy and lower noise floor (25µVRMS); reject if board space or capacitor count is constrained. |
Compared with TLVH431AIDBZR and REF3033AIDBZR, the ZXRE330ASA-7 uniquely delivers 3.3V precision regulation at sub-microampere currents without external components - making it irreplaceable in energy-harvesting sensors and maintenance-free battery systems where every nanoampere matters.
Availability
ZXRE330ASA-7 is available at Aetrix Electronics and suitable for battery-powered instrumentation, precision data acquisition, and portable communications devices requiring stable component supply with guaranteed long-term sourcing and RoHS-compliant manufacturing.
Supply support for ZXRE330ASA-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 semiconductor company specializing in discrete, analog, and mixed-signal ICs, with design centers in Asia, Europe, and the US, and manufacturing in IATF 16949-certified facilities.
The ZXRE330 belongs to Diodes' precision analog reference product line, engineered specifically for ultra-low-power, high-stability voltage referencing in portable and battery-constrained systems - not general-purpose regulation.
FAQ
What is the minimum operating current for stable regulation?
The ZXRE330ASA-7 maintains regulation down to 1µA, verified across –40°C to +85°C. Below this, output voltage drops sharply - confirmed by Figure 3 (Minimal Operating Current) in DS36772 Rev 4-2. This enables use in micropower wake-up circuits where supply current must remain below 2µA during standby.
Can ZXRE330ASA-7 drive a 1000pF capacitive load without oscillation?
Yes - the device is explicitly characterized for stability with ≥100nF capacitive loads (Section "Application Information"), and its internal compensation ensures no phase margin degradation up to 10µF. No external capacitor is required, even when driving ADC sample-and-hold inputs with 1000pF effective capacitance.
How does pin 3 function in the SOT23 package?
In the SOT23-3 package, pin 3 is the die attach pad electrically connected to pin 2 (cathode). Per datasheet page 5, it must be left floating or shorted to pin 2 - never driven independently or grounded. This avoids unintended current paths that degrade reference accuracy or cause thermal runaway.
Is ZXRE330ASA-7 qualified for automotive applications?
No - ZXRE330ASA-7 is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., ZXRE330AV-A in TO92) with PPAP capability and IATF 16949 manufacturing, but the -7 suffix indicates commercial-grade SOT23 packaging intended for industrial and portable consumer applications.
ZXRE330ASA-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:
- ±0.5%
- 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
ZXRE330ASA-7 FAQ
1.How can I place an order for ZXRE330ASA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXRE330ASA-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 ZXRE330ASA-7 reliable?
The price and inventory of ZXRE330ASA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXRE330ASA-7 is usually 5 days.
3.What payment methods are accepted for ZXRE330ASA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXRE330ASA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXRE330ASA-7?
ZXRE330ASA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXRE330ASA-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 ZXRE330ASA-7?
For technical support, including ZXRE330ASA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXRE330ASA-7 requirements.
6.How does Aetrix verify that ZXRE330ASA-7 is sourced from the original manufacturer or authorized distributors?
All ZXRE330ASA-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 ZXRE330ASA-7 meets industry standards.
7.What is the process for return or replacement of ZXRE330ASA-7?
All ZXRE330ASA-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZXRE330ASA-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 ZXRE330ASA-7 part is unused and in its original packaging.
Return procedure for ZXRE330ASA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZXRE330ASA-7 Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
