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Renesas HZS4ALLTA-E
- Part No.:
- HZS4ALLTA-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS4ALLTA-E.pdf
- Description:
- DIODE ZENER
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Inventory:23,571
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Product details
Overview
HZS4ALLTA-E from Renesas Electronics is a silicon planar Zener diode optimized for hard-knee, low-noise voltage reference applications at low current (IZ = 0.5 mA), with a nominal Zener voltage of 3.6 V (min 3.4 V, max 3.8 V), dynamic impedance of 370 Ω at IZT = 2.0 mA, and temperature coefficient of ±0.6 mV/°C - used in precision analog power supply regulation and sensor biasing circuits.
For engineers reviewing the HZS4ALLTA-E datasheet, HZS4ALLTA-E pinout, HZS4ALLTA-E application, or HZS4ALLTA-E equivalent, key selection criteria include its sharp breakdown knee below 1 mA, low noise performance (~1/10 that of conventional Zeners), MHD package compatibility with 5 mm-pitch automated insertion, and suitability for stable low-current reference designs requiring minimal thermal drift.
Technical Context
The HZS4ALLTA-E employs a planar diffusion process to achieve semilogarithmic linear VZ–IZ characteristics from 1 nA to 1 mA, enabling precise low-current regulation where conventional Zeners exhibit soft knees. Its hard-knee behavior stems from controlled doping profiles that minimize avalanche onset dispersion.
It delivers low dynamic impedance (370 Ω typ. at 2.0 mA) and ultra-low noise in the microampere range - critical for high-resolution ADC references and low-power sensor signal conditioning. The device operates within a junction temperature range of –55°C to +175°C and is rated for 250 mW power dissipation at 25°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.4 V min to 3.8 V max at IZ = 0.5 mA - defines tight tolerance band for stable low-current reference generation |
| Dynamic Impedance (ZZT) | 370 Ω typical at IZT = 2.0 mA - ensures minimal output voltage shift under load transients |
| Reverse Current (IR) | ≤100 nA at VR = 1.0 V - guarantees negligible leakage in standby-biased reference nodes |
| Temperature Coefficient (γZ) | ±0.6 mV/°C - enables predictable, low-drift operation across industrial temperature range |
| Power Dissipation (Pd) | 250 mW at Ta = 25°C - supports compact PCB layouts without forced cooling in low-power systems |
| Junction Temperature (Tj) | –55°C to +175°C - allows deployment in under-hood automotive or industrial control environments |
Pinout & Package
The HZS4ALLTA-E is housed in the MHD package (JEITA code GRZZ0002ZC-A), a miniature axial-lead glass-epoxy molded diode package with 2.0 mm body diameter and 26.0 mm lead length, designed for 5 mm-pitch high-speed automatic insertion.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated positive rail; reverse-biased terminal accepting input voltage higher than VZ |
| 2 (Non-banded End) | Anode | Ground or common reference node; establishes current path through external series resistor |
Key Features
| Feature | Design Value |
|---|---|
| Hard-knee breakdown | VZ–IZ linearity maintained from 1 nA to 1 mA - eliminates ambiguity in low-current regulation threshold |
| Low-noise operation | Approximately 1/10 noise of standard Zeners - improves SNR in precision analog front-ends |
| Low temperature coefficient | ±0.6 mV/°C - reduces calibration burden in wide-temperature industrial sensors |
| MHD package compatibility | Standard 5 mm pitch - enables direct integration into high-volume automated assembly lines |
Applications
| Industrial Sensor Biasing | Portable Instrument Reference |
|---|---|
Use Scenario: Providing stable excitation voltage to resistive bridge sensors (e.g., strain gauges, RTDs) in battery-powered condition monitoring units. IC Role / Device Role / Timing Role: Low-current Zener reference diode establishing fixed bias point independent of supply variation. Use Value: Enables <1 µV/°C drift performance in 16-bit measurement systems due to hard-knee stability and low γZ. |
Use Scenario: Generating clean, low-drift reference for handheld multimeters and portable data loggers operating from coin-cell batteries. IC Role / Device Role / Timing Role: Precision shunt reference delivering 3.6 V at sub-100 µA quiescent current. Use Value: Extends battery life >20% vs. standard Zeners by maintaining regulation down to 1 nA leakage-sensitive conditions. |
| ADC Voltage Reference | Low-Power Microcontroller Reset Circuit |
Use Scenario: Supplying reference voltage to SAR and delta-sigma ADCs in IoT edge nodes where supply rails vary between 3.3 V and 4.2 V. IC Role / Device Role / Timing Role: Shunt regulator stabilizing VREF input against rail ripple and load-induced sag. Use Value: Reduces integral nonlinearity (INL) error by up to 0.5 LSB via low ZZT and low-noise operation. |
Use Scenario: Generating accurate reset threshold for 3.3 V microcontrollers in energy-harvesting wireless sensor nodes. IC Role / Device Role / Timing Role: Zener-based voltage monitor triggering POR or brown-out detection circuitry. Use Value: Ensures deterministic reset assertion at 3.6 V ±0.2 V across –40°C to +85°C with no external trimming required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C3V6 (Nexperia) | Higher dynamic impedance (600 Ω typ.), wider VZ tolerance (3.42–3.78 V), SOT-23 package | Designed for general-purpose regulation; lacks hard-knee linearity below 10 µA | Preferred for cost-sensitive consumer designs where ultra-low-noise and sub-µA knee precision are not required |
| MM3Z3V6 (ON Semiconductor) | Lower power rating (200 mW), higher tempco (±2.5 mV/°C), tighter VZ spread (3.53–3.67 V) | Optimized for space-constrained PCBs; exhibits softer knee above 10 µA | Selected when board area is critical and thermal drift budget allows >4× higher γZ than HZS4ALLTA-E |
Compared with BZX84-C3V6 and MM3Z3V6, the HZS4ALLTA-E provides superior low-current regulation fidelity, lower noise, and tighter thermal stability - making it the preferred choice for high-accuracy analog subsystems where reference integrity directly impacts measurement validity.
Availability
HZS4ALLTA-E is available at Aetrix Electronics and suitable for industrial sensor biasing, portable instrument reference, and ADC voltage reference applications requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.
Supply support for HZS4ALLTA-E 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
Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog power devices, and timing solutions for industrial, automotive, and infrastructure markets.
The HZS-LL Series was developed specifically for precision low-noise voltage reference applications demanding hard-knee breakdown and stable operation at currents as low as 1 nA - targeting high-reliability analog signal chains in test equipment and sensor systems.
FAQ
What is the Zener voltage tolerance of HZS4ALLTA-E at 0.5 mA?
The HZS4ALLTA-E has a specified Zener voltage range of 3.4 V minimum to 3.8 V maximum when tested at IZ = 0.5 mA (DC). This ±0.2 V tolerance band ensures consistent reference accuracy across production lots without requiring post-manufacture sorting or trimming. The HZS4ALLTA-E achieves this tight spread via tightly controlled planar diffusion processing.
Does HZS4ALLTA-E support operation below 1 µA?
Yes - the HZS4ALLTA-E maintains semilogarithmic linear VZ–IZ characteristics down to 1 nA, confirmed in Figure 1 of the official Renesas datasheet REJ03G0167-0300. Its hard-knee behavior ensures predictable regulation even at nanoampere-level currents, unlike conventional Zeners that exhibit significant voltage droop below 10 µA. This makes the HZS4ALLTA-E uniquely suited for ultra-low-power reference designs.
What is the maximum allowable power dissipation for HZS4ALLTA-E at 85°C ambient?
Per the derating curve in Figure 3 of the HZS-LL Series datasheet, the HZS4ALLTA-E's maximum power dissipation decreases linearly from 250 mW at 25°C to approximately 150 mW at 85°C ambient temperature. This derating ensures safe junction temperature operation within the rated 175°C limit. Exceeding this value risks thermal runaway or accelerated parametric drift in the HZS4ALLTA-E.
Is HZS4ALLTA-E RoHS compliant?
Yes - the HZS4ALLTA-E conforms to the EU RoHS Directive (2011/65/EU) as confirmed by Renesas Electronics' environmental compliance documentation. It contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE) above threshold limits. Full material declarations are available upon request for the HZS4ALLTA-E.
Can HZS4ALLTA-E replace standard 3.6 V Zener diodes in existing designs?
The HZS4ALLTA-E can serve as a functional upgrade in most 3.6 V Zener applications - especially where low-noise, hard-knee behavior, or improved thermal stability is needed. Its MHD package matches standard axial-leaded footprints, and its cathode/anode pinout is identical. However, due to its lower dynamic impedance and tighter VZ tolerance, minor series resistor recalculations may be required to maintain optimal bias current for the HZS4ALLTA-E.
HZS4ALLTA-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
HZS4ALLTA-E FAQ
1.How can I place an order for HZS4ALLTA-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS4ALLTA-E 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 HZS4ALLTA-E reliable?
The price and inventory of HZS4ALLTA-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS4ALLTA-E is usually 5 days.
3.What payment methods are accepted for HZS4ALLTA-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS4ALLTA-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS4ALLTA-E?
HZS4ALLTA-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS4ALLTA-E 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 HZS4ALLTA-E?
For technical support, including HZS4ALLTA-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS4ALLTA-E requirements.
6.How does Aetrix verify that HZS4ALLTA-E is sourced from the original manufacturer or authorized distributors?
All HZS4ALLTA-E 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 HZS4ALLTA-E meets industry standards.
7.What is the process for return or replacement of HZS4ALLTA-E?
All HZS4ALLTA-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS4ALLTA-E, 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 HZS4ALLTA-E part is unused and in its original packaging.
Return procedure for HZS4ALLTA-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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