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Renesas HZ7A1LTA-E
- Part No.:
- HZ7A1LTA-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ7A1LTA-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:20,000
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Product details
Overview
HZ7A1LTA-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 6.3–6.6 V at 0.5 mA, dynamic resistance of 60 Ω max, and 400 mW power dissipation in DO-35 package - deployed in regulated power supplies, sensor biasing, and ADC reference circuits.
For engineers reviewing the HZ7A1LTA-E datasheet, HZ7A1LTA-E pinout, HZ7A1LTA-E application, or HZ7A1LTA-E equivalent, this part delivers verified low-noise performance (≈1/3–1/10 lower than legacy HZ series), tight zener voltage tolerance, and stable temperature coefficient - critical for high-accuracy voltage references in industrial instrumentation and medical signal conditioning.
Technical Context
This device operates as a two-terminal shunt voltage regulator with DC-tested zener breakdown characteristics. Its low dynamic impedance (≤60 Ω at IZ = 0.5 mA) and low leakage current (<1 μA at VR = 2.0 V) support stable regulation under light-load and low-current conditions typical in reference design.
The HZ7A1LTA-E exhibits a zener voltage temperature coefficient of approximately −0.02 %/°C (−0.10 mV/°C) near 6.5 V, confirmed by Figure 2 in REJ03G0182-0300 Rev.3.00, enabling predictable drift compensation in ambient-temperature-varying environments up to +125°C derated operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.3–6.6 V at IZ = 0.5 mA - defines precise regulation point for low-power reference nodes |
| Dynamic Resistance (rd) | ≤60 Ω at IZ = 0.5 mA - ensures minimal output voltage variation under load transients |
| Power Dissipation (Pd) | 400 mW at Ta = 25°C - supports continuous operation in compact PCB layouts without forced cooling |
| Reverse Leakage Current (IR) | ≤1 μA at VR = 2.0 V - preserves accuracy in high-impedance bias networks |
| Junction Temperature (Tj) | −55 to +175°C - enables deployment in extended-temperature industrial environments |
| Noise Level | ≈1/3–1/10 of standard HZ-series diodes - reduces RMS noise contribution in sensitive analog front-ends |
Pinout & Package
Package: DO-35 (JEITA code GRZZ0002ZB-A), glass axial leaded package with orange body and navy-blue cathode band. Dimensions per SC-40 outline: φD = 2.0 mm, L = 26.0 mm, E = 4.2 mm, mass ≈ 0.13 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to higher-potential node; reverse-biased operation establishes stable reference voltage |
| 2 (Anode) | Reference ground return | Provides low-impedance path to circuit common; must be routed with minimal trace inductance for noise control |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise zener structure | Diode noise reduced to ≈1/3–1/10 of HZ-series - directly improves SNR in precision voltage references |
| Stable low-impedance regulation | rd ≤ 60 Ω at 0.5 mA - maintains <0.1% output deviation across 10–90% load current range |
| Wide zener voltage range coverage | Part of HZ-L family spanning 5.2–38 V - allows single-supplier sourcing for multi-rail reference designs |
| High thermal robustness | Tj rating of +175°C - supports reliability in sealed enclosures or high-ambient-temperature applications |
Applications
| Industrial Sensor Signal Conditioning | Medical Instrumentation Reference |
|---|---|
Use Scenario: Biasing bridge sensors and powering low-drift op-amps in pressure/temperature transmitters. IC Role / Device Role / Timing Role: Provides stable 6.5 V reference for ADC input scaling and excitation current sources. Use Value: Low dynamic resistance and ultra-low noise ensure <±0.02% gain stability over temperature and time. |
Use Scenario: Supplying reference voltage to 16-bit delta-sigma ADCs in portable ECG monitors. IC Role / Device Role / Timing Role: Serves as primary shunt reference for analog front-end signal chain calibration. Use Value: Verified 1 μA max leakage prevents loading errors in high-Z electrode interface circuits. |
| Programmable Logic Controller (PLC) I/O Modules | Test & Measurement Equipment Calibration |
Use Scenario: Voltage clamping and rail stabilization in isolated analog input channels handling ±10 V signals. IC Role / Device Role / Timing Role: Acts as precision clamp and reference in dual-supply protection circuitry. Use Value: Tight 6.3–6.6 V tolerance eliminates need for post-calibration trimming in production test. |
Use Scenario: Embedded reference in handheld multimeters requiring long-term drift <50 ppm/°C. IC Role / Device Role / Timing Role: Functions as secondary reference against which DMM internal DACs are validated. Use Value: Documented −0.02 %/°C tempco enables accurate ambient-compensated calibration routines. |
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 |
|---|---|---|---|
| ON Semiconductor MMBZ5231BS | Zener voltage 6.2 V (±5%), rd = 17 Ω @ 20 mA - lower impedance but higher test current; not rated for low-noise use | Optimized for general-purpose regulation, not low-noise analog references | Select only when noise <100 nV/√Hz is not required and higher test current is acceptable |
| Vishay BZX84-C6V2 | Zener voltage 6.2 V (±5%), rd = 60 Ω @ 5 mA - same impedance spec but tested at 5× higher current; no published noise data | Designed for cost-sensitive consumer power rails, not precision instrumentation | Use only in non-critical biasing where long-term drift and noise are unmonitored |
Compared with MMBZ5231BS and BZX84-C6V2, the HZ7A1LTA-E uniquely specifies low-noise performance, tighter voltage tolerance (±2.4% vs. ±5%), and validated 0.5 mA test condition - making it the sole choice for sub-100 ppm accuracy analog references where noise and drift govern system specification.
Availability
HZ7A1LTA-E is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, medical instrumentation reference, and programmable logic controller (PLC) I/O modules requiring stable component supply with full traceability and lifecycle continuity.
Supply support for HZ7A1LTA-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.
The HZ-L Series was designed specifically for low-noise, high-stability voltage reference applications in precision analog systems - addressing demand for improved SNR and thermal drift performance beyond legacy Zener families.
FAQ
What is the exact zener voltage range for HZ7A1LTA-E at 0.5 mA?
The HZ7A1LTA-E has a guaranteed zener voltage range of 6.3 V to 6.6 V when tested at IZ = 0.5 mA and Ta = 25°C, as specified in the Electrical Characteristics table on page 2 of REJ03G0182-0300 Rev.3.00. This 300 mV span reflects tight process control for precision reference use, and the HZ7A1LTA-E must be selected within this band for calibrated circuit operation.
Does HZ7A1LTA-E meet RoHS requirements?
Yes, the HZ7A1LTA-E complies with the EU RoHS Directive, as confirmed by Renesas Electronics' environmental compliance documentation and material declarations. The DO-35 glass package contains no lead in solderable terminations, and all homogeneous materials meet the maximum concentration limits for restricted substances - consistent with Renesas' commitment to environmentally responsible manufacturing.
What is the maximum allowable ambient temperature for continuous operation of HZ7A1LTA-E?
The HZ7A1LTA-E supports continuous operation up to +125°C ambient temperature when derated per the Power Dissipation vs. Ambient Temperature curve (Figure 3, page 4). At Ta = 125°C, its usable power dissipation drops to ≈180 mW; full 400 mW rating applies only at Ta = 25°C. Thermal design must account for PCB copper area and airflow to maintain junction temperature ≤175°C.
Is HZ7A1LTA-E suitable for life-support medical equipment?
No, the HZ7A1LTA-E is classified as a "Standard" quality grade device per Renesas' quality grading system (page 7, Note 7), intended for applications such as industrial robots and test equipment - not for life-support medical systems. Renesas explicitly prohibits use in artificial life support devices, surgical implants, or healthcare interventions without prior written consent, and the HZ7A1LTA-E carries no qualification for such "Specific" applications.
How does the noise performance of HZ7A1LTA-E compare to standard Zener diodes?
The HZ7A1LTA-E achieves approximately 1/3 to 1/10 the noise level of conventional HZ-series Zener diodes, as stated in the Features section (page 1). This reduction is achieved through proprietary silicon planar processing and optimized junction geometry - directly lowering RMS broadband noise in voltage reference paths, which is measurable and critical for 16+ bit data acquisition systems using the HZ7A1LTA-E.
HZ7A1LTA-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:
- -
HZ7A1LTA-E FAQ
1.How can I place an order for HZ7A1LTA-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ7A1LTA-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 HZ7A1LTA-E reliable?
The price and inventory of HZ7A1LTA-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ7A1LTA-E is usually 5 days.
3.What payment methods are accepted for HZ7A1LTA-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ7A1LTA-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ7A1LTA-E?
HZ7A1LTA-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ7A1LTA-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 HZ7A1LTA-E?
For technical support, including HZ7A1LTA-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ7A1LTA-E requirements.
6.How does Aetrix verify that HZ7A1LTA-E is sourced from the original manufacturer or authorized distributors?
All HZ7A1LTA-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 HZ7A1LTA-E meets industry standards.
7.What is the process for return or replacement of HZ7A1LTA-E?
All HZ7A1LTA-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ7A1LTA-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 HZ7A1LTA-E part is unused and in its original packaging.
Return procedure for HZ7A1LTA-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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