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Renesas HZS9A2LTA-E
- Part No.:
- HZS9A2LTA-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS9A2LTA-E.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:15,000
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Product details
Overview
HZS9A2LTA-E from Renesas Electronics is a silicon planar Zener diode optimized for low-noise voltage reference and stabilization in precision analog circuits, featuring a nominal zener voltage of 7.9–8.3 V, 400 mW power dissipation, and dynamic resistance of 60 Ω at 6.0 mA test current - deployed in stabilized power supplies, sensor biasing, and ADC reference circuits.
For engineers reviewing the HZS9A2LTA-E datasheet, HZS9A2LTA-E pinout, HZS9A2LTA-E application, or HZS9A2LTA-E equivalent, key selection criteria include zener voltage tolerance (±0.2 V), low noise performance (~1/3–1/10 of HZ series), temperature coefficient behavior near 0 mV/°C, and compatibility with 5 mm-pitch high-speed automatic insertion.
Technical Context
This device operates as a two-terminal voltage reference using silicon planar junction technology, with zener breakdown mechanism dominant in its 7.9–8.3 V range. Its low dynamic impedance (60 Ω) and tight voltage tolerance support stable regulation under varying load and temperature conditions.
The HZS9A2LTA-E exhibits a near-zero zener voltage temperature coefficient (γZ ≈ 0 mV/°C) in the 7–9 V range, confirmed by Figure 2 of REJ03G0166-0300, minimizing drift across industrial ambient temperatures (−55 to +175 °C storage, derated operation above 25 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.9–8.3 V at IZ = 0.5 mA - defines precise DC reference level for feedback loops and analog signal conditioning. |
| Dynamic Resistance (rd) | 60 Ω max at IZ = 6.0 mA - ensures minimal output voltage variation under load transients in regulated supplies. |
| Power Dissipation (Pd) | 400 mW at Ta = 25 °C - supports continuous operation in compact PCB layouts with moderate thermal management. |
| Reverse Leakage (IR) | 1 μA max at VR = 2.0 V - enables high-impedance bias networks without significant error current injection. |
| Junction Temperature (Tj) | 200 °C maximum - allows reliable operation in thermally demanding environments such as enclosed industrial enclosures. |
| Noise Level | ~1/3–1/10 of HZ series - directly reduces broadband voltage noise in sensitive reference paths, critical for 16-bit+ ADCs. |
Pinout & Package
Package: MHD (JEITA code GRZZ0002ZC-A), axial-leaded, 2.0 mm diameter, 26.0 mm body length, 5 mm pitch - designed for high-speed automated insertion and wave soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener voltage reference terminal | Connected to regulated output node; polarity must be observed to maintain reverse-bias operation. |
| 2 (Anode) | Reference ground return | Completes bias path; low-inductance connection minimizes noise coupling in precision references. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise Zener structure | Reduces broadband voltage noise by up to 90% vs. legacy HZ series - critical for high-resolution data acquisition systems. |
| Tight zener voltage tolerance | ±0.2 V window (7.9–8.3 V) at 0.5 mA - eliminates need for post-production trimming in mid-precision voltage references. |
| Near-zero temperature coefficient | γZ ≈ 0 mV/°C near 8 V - minimizes drift over −40 to +85 °C operating range without external compensation. |
| High reliability planar junction | 200 °C max junction temperature and −55 to +175 °C storage range - suitable for extended-life industrial deployments. |
| Automated assembly compatibility | 5 mm lead pitch and MHD package geometry - supports high-throughput placement on SMT-compatible through-hole lines. |
Applications
| Industrial Power Supply Reference | High-Resolution ADC Biasing |
|---|---|
|
Use Scenario: Stabilized ±12 V dual-rail supply for PLC I/O modules requiring long-term voltage stability. IC Role / Device Role / Timing Role: Primary zener reference for TL431-based shunt regulator feedback network. Use Value: 60 Ω dynamic resistance and low noise ensure <100 μVpp ripple rejection and <5 ppm/°C drift over temperature. |
Use Scenario: Precision 18-bit SAR ADC (e.g., AD7606) requiring ultra-low-noise 4.096 V reference derived via resistor divider. IC Role / Device Role / Timing Role: Low-drift, low-noise voltage source feeding resistive divider to generate clean reference voltage. Use Value: 1/10 noise vs. HZ series prevents degradation of ENOB beyond 16.2 bits in 10 kSPS acquisition. |
| Sensor Signal Conditioning | Optocoupler Feedback Loop |
|
Use Scenario: Bridge sensor excitation in strain-gauge weigh scales where excitation voltage stability dictates measurement accuracy. IC Role / Device Role / Timing Role: Fixed-voltage bias source for Wheatstone bridge, isolated via op-amp buffer. Use Value: Tight 7.9–8.3 V tolerance and near-zero γZ limit bridge voltage drift to <0.02% FS over −25 to +70 °C. |
Use Scenario: Secondary-side voltage sensing in isolated flyback converters using PC817 optocoupler feedback. IC Role / Device Role / Timing Role: Zener clamp defining regulation threshold for optocoupler LED drive current. Use Value: 400 mW rating and low rd enable stable 8.1 V threshold despite transformer leakage and load step variations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4733A (ON Semiconductor) | Zener voltage 5.1 V, 1 W rating, higher noise, ±5% tolerance, DO-41 package | Higher power but looser tolerance and no low-noise optimization - suited for general-purpose regulation only | Select only if >500 mW dissipation or cost-driven non-precision use cases are required |
| BZX84-C8V2 (Diodes Inc.) | 8.2 V nominal, SOT-23 package, 300 mW, ±5% tolerance, higher rd (90 Ω) | Surface-mount form factor but inferior noise and temperature stability - limited to space-constrained non-critical refs | Choose only when board space mandates SMT and 0.1% drift is acceptable |
Compared with 1N4733A and BZX84-C8V2, HZS9A2LTA-E delivers superior voltage stability (±0.2 V), lower noise, and near-zero temperature drift - making it the preferred choice for industrial-grade analog references where long-term accuracy outweighs package size or raw power rating.
Availability
HZS9A2LTA-E is available at Aetrix Electronics and suitable for industrial power supplies, precision data acquisition systems, and sensor interface circuits requiring stable component supply with guaranteed long-term continuity.
Supply support for HZS9A2LTA-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, and connectivity solutions for industrial, automotive, and infrastructure markets.
HZS9A2LTA-E belongs to the HZS-L Series of low-noise silicon planar Zener diodes, engineered specifically for high-stability voltage reference applications in industrial instrumentation and precision analog systems.
FAQ
What is the exact zener voltage range specified for HZS9A2LTA-E?
The HZS9A2LTA-E has a guaranteed zener voltage range of 7.9 V to 8.3 V when tested at IZ = 0.5 mA, per Renesas datasheet REJ03G0166-0300 Rev.3.00. This tight ±0.2 V window ensures predictable performance in feedback and reference circuits without calibration.
Does HZS9A2LTA-E support high-speed automated assembly?
Yes, HZS9A2LTA-E uses the MHD package with 5 mm lead pitch and JEITA code GRZZ0002ZC-A, explicitly qualified for high-speed automatic insertion per the datasheet's "Suitable for 5mm-pitch high speed automatic insertion" statement - enabling efficient throughput in through-hole manufacturing lines.
How does the noise performance of HZS9A2LTA-E compare to standard Zener diodes?
HZS9A2LTA-E achieves approximately 1/3 to 1/10 the noise level of the legacy HZ series, as stated in the "Features" section of REJ03G0166-0300. This low-noise characteristic is intrinsic to its silicon planar Zener structure and makes HZS9A2LTA-E suitable for high-resolution ADC references and low-drift sensor excitation.
What is the maximum allowable power dissipation for HZS9A2LTA-E at 75°C ambient?
Per Figure 3 in REJ03G0166-0300, the HZS9A2LTA-E's power dissipation derates linearly from 400 mW at 25°C to ~250 mW at 75°C ambient temperature on a standard 100 × 180 × 1.6 mm phenolic PCB - requiring thermal design consideration for sustained full-load operation above 50°C.
Is HZS9A2LTA-E rated for automotive or safety-critical applications?
No, HZS9A2LTA-E is classified as a "Standard" quality grade device per Renesas' quality grading system (Note 7, page 1), intended for industrial, office, and communications equipment - not for automotive, medical life-support, or aerospace applications without explicit written consent from Renesas Electronics.
HZS9A2LTA-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:
- -
HZS9A2LTA-E FAQ
1.How can I place an order for HZS9A2LTA-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS9A2LTA-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 HZS9A2LTA-E reliable?
The price and inventory of HZS9A2LTA-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS9A2LTA-E is usually 5 days.
3.What payment methods are accepted for HZS9A2LTA-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS9A2LTA-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS9A2LTA-E?
HZS9A2LTA-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS9A2LTA-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 HZS9A2LTA-E?
For technical support, including HZS9A2LTA-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS9A2LTA-E requirements.
6.How does Aetrix verify that HZS9A2LTA-E is sourced from the original manufacturer or authorized distributors?
All HZS9A2LTA-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 HZS9A2LTA-E meets industry standards.
7.What is the process for return or replacement of HZS9A2LTA-E?
All HZS9A2LTA-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS9A2LTA-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 HZS9A2LTA-E part is unused and in its original packaging.
Return procedure for HZS9A2LTA-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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