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Renesas HZU7A1LTRF-E
- Part No.:
- HZU7A1LTRF-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZU7A1LTRF-E.pdf
- Description:
- DIODE ZENER
- Quantity:
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Inventory:45,000
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Product details
Overview
HZU7A1LTRF-E from Renesas Electronics is a silicon epitaxial planar Zener diode optimized for hard-knee, low-noise voltage reference applications, with nominal Zener voltage 7.5 V (VZ = 7.5 V at IZ = 0.5 mA), dynamic resistance ZZT = 400 Ω (typ.), and ultra-small URP package (SC-76A). It delivers low noise voltage (~1/3–1/10 of HZU series) and reduced temperature coefficient (~1/2 of HZU series), targeting precision analog front-ends in portable instrumentation.
For engineers reviewing the HZU7A1LTRF-E datasheet, HZU7A1LTRF-E pinout, HZU7A1LTRF-E application, or HZU7A1LTRF-E equivalent, key selection criteria include its semi-logarithmic VZ–IZ linearity (1 nA to 1 mA), 150 mW power dissipation, −55°C to +150°C storage range, and suitability for low-current, low-drift reference designs requiring stable knee behavior.
Technical Context
The HZU7A1LTRF-E operates as a two-terminal voltage reference diode with cathode-anode polarity, designed for DC-biased reverse breakdown operation. Its Zener voltage exhibits semi-logarithmic linearity across an exceptionally wide current range (1 nA to 1 mA), enabling accurate low-current regulation and noise-sensitive biasing.
It features a hard-knee Zener characteristic with minimal curvature near the knee point, supported by low dynamic impedance (ZZT = 400 Ω typ. at IZT = 0.5 mA) and tight VZ tolerance (±0.2 V at IZ = 0.5 mA), distinguishing it from standard soft-knee Zeners used in general-purpose clamping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 7.5 V ±0.2 V at IZ = 0.5 mA - defines precise reference level for low-power analog circuits |
| Dynamic Resistance ZZT | 400 Ω (typ.) at IZT = 0.5 mA - ensures minimal output voltage variation under load current changes |
| Reverse Current IR | ≤100 nA at VR = 5.0 V - enables ultra-low leakage in high-impedance bias networks |
| Power Dissipation Pd | 150 mW (Ta = 25°C) - sets maximum continuous DC power handling in surface-mount layout |
| Junction Temperature Tj | 150°C - supports operation in thermally constrained embedded modules |
| Storage Temperature | −55°C to +150°C - allows use in industrial and automotive under-hood environments |
| Temperature Coefficient γZ | ≈−2.0 mV/°C (typ., derived from Fig.2 at VZ ≈ 7.5 V) - quantifies drift per degree for stability budgeting |
Pinout & Package
Package: Ultra Small Resin Package (URP), JEITA code SC-76A, Renesas code PTSP0002ZA-A, mass 0.004 g. Dimensions: A1 = 0.15–0.30 mm, A2 = 0.75–0.90 mm, b = 1.55–1.85 mm, D = 0.80 mm, E = 0.80 mm, e1 = 2.30 mm, l1 = 1.10–1.40 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to higher-potential node; reverse-bias terminal where Zener breakdown occurs |
| 2 | Anode | Connected to lower-potential node (typically ground or common return); completes reverse-bias path |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise voltage reference | 1/3–1/10 noise vs. HZU series - reduces RMS noise contribution in precision ADC references |
| Hard-knee Zener characteristic | Semi-logarithmic VZ–IZ linearity from 1 nA to 1 mA - enables stable regulation even at sub-microamp bias currents |
| Reduced temperature coefficient | ≈1/2 γZ vs. HZU series - improves thermal stability in unregulated ambient conditions |
| Ultra-small URP package | SC-76A footprint (2.3 × 1.2 mm max) - supports high-density PCB layouts in space-constrained portable devices |
Applications
| Portable Instrumentation Reference | Low-Power Sensor Biasing |
|---|---|
Use Scenario: Providing stable 7.5 V reference for 16-bit SAR ADCs in handheld multimeters and data loggers operating on coin-cell batteries. IC Role / Device Role / Timing Role: Two-terminal Zener reference diode supplying regulated voltage to ADC reference input and op-amp bias networks. Use Value: Low 100 nA reverse leakage and hard-knee linearity ensure reference accuracy remains within ±0.1% over 10–100 µA load variations. | Use Scenario: Biasing bridge-type MEMS pressure sensors and low-noise JFET amplifiers in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Precision DC voltage source establishing fixed bias point for sensor excitation and amplifier quiescent current setting. Use Value: 400 Ω dynamic resistance minimizes sensor output offset drift caused by supply ripple coupling into bias rail. |
| Industrial Analog Front-End | Calibration-Grade Voltage Standard |
Use Scenario: Serving as primary reference in 4–20 mA transmitter signal conditioning stages exposed to −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Stable Zener element in ratiometric reference chain feeding DACs and current-sense amplifiers. Use Value: −2.0 mV/°C tempco and 150°C junction rating allow full-range operation without external compensation circuitry. | Use Scenario: Embedded calibration node in field-deployable test equipment requiring traceable 7.5 V reference with <10 ppm/°C drift. IC Role / Device Role / Timing Role: Primary voltage standard in self-calibrating subsystems where long-term drift must be minimized. Use Value: Hard-knee behavior and low noise enable repeatable 0.01% voltage matching across multiple units during factory calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C7V5LT1G | VZ = 7.5 V ±5%, ZZT = 600 Ω (min), IR ≤ 1 µA at VR = 5.0 V - higher leakage and looser tolerance | General-purpose clamping; not specified for low-noise or hard-knee linearity | Select when cost sensitivity outweighs noise and knee performance requirements |
| MMSZ4689T1G | VZ = 7.5 V ±5%, ZZT = 500 Ω (max), no published low-current linearity or noise data | Standard voltage reference; lacks documented 1 nA–1 mA VZ linearity or γZ optimization | Choose for non-critical biasing where full HZU-LL series performance is unnecessary |
Compared with BZX84-C7V5LT1G and MMSZ4689T1G, the HZU7A1LTRF-E provides verified hard-knee linearity down to 1 nA, 3× lower noise, and 2× lower temperature coefficient - critical for metrology-grade analog signal chains where reference integrity directly impacts measurement resolution.
Availability
HZU7A1LTRF-E is available at Aetrix Electronics and suitable for portable instrumentation reference, low-power sensor biasing, and industrial analog front-end designs requiring stable component supply, consistent parametric performance, and RoHS-compliant packaging.
Supply support for HZU7A1LTRF-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 manufacturer specializing in microcontrollers, analog mixed-signal, and power management solutions for industrial, automotive, and infrastructure markets.
The HZU-LL Series was developed specifically to address demand for ultra-low-noise, hard-knee Zener references in portable and battery-operated precision analog systems - emphasizing low-current linearity, thermal stability, and miniature packaging.
FAQ
What is the nominal Zener voltage and test condition for HZU7A1LTRF-E?
The nominal Zener voltage of HZU7A1LTRF-E is 7.5 V, measured at a test current IZ of 0.5 mA under DC conditions (per REJ03G1216-0500 Rev.5.00). The device guarantees VZ between 7.3 V and 7.7 V at this condition, supporting tight-tolerance analog reference design. This specification is confirmed in the Electrical Characteristics table on page 2 of the official Renesas datasheet for HZU7A1LTRF-E.
Does HZU7A1LTRF-E support operation at very low reverse currents?
Yes, HZU7A1LTRF-E exhibits semi-logarithmic VZ–IZ linearity from 1 nA to 1 mA, as explicitly stated in the Features section of the HZU7A1LTRF-E datasheet. This enables stable voltage reference behavior even in ultra-low-power bias networks where current is limited to nanoamps - a capability not guaranteed by standard Zener diodes.
What is the package type and mounting compatibility of HZU7A1LTRF-E?
HZU7A1LTRF-E uses the Ultra Small Resin Package (URP), JEITA code SC-76A, with land pattern dimensions matching standard SOT-323 footprints. Its 2-pin configuration (cathode/anode), 2.3 × 1.2 mm outline, and 0.65 mm pitch are compatible with automated pick-and-place and reflow soldering processes used for surface-mount discrete semiconductors like the HZU7A1LTRF-E.
How does the noise performance of HZU7A1LTRF-E compare to earlier HZU-series diodes?
HZU7A1LTRF-E achieves approximately 1/3 to 1/10 the noise voltage of the legacy HZU series, as documented in the Features section of its datasheet. This improvement stems from epitaxial planar process enhancements and optimized junction design - making HZU7A1LTRF-E suitable for noise-sensitive applications such as high-resolution ADC references where the HZU7A1LTRF-E's low-noise trait directly improves effective number of bits (ENOB).
Is HZU7A1LTRF-E rated for automotive or extended temperature applications?
HZU7A1LTRF-E has a storage temperature range of −55°C to +150°C and a maximum junction temperature of 150°C, but Renesas classifies it as a "Standard" quality grade product intended for computers, office equipment, and industrial instruments - not automotive or safety-critical systems. Its datasheet contains no AEC-Q200 qualification or automotive-specific reliability testing, so HZU7A1LTRF-E should not be deployed in vehicle ECUs without additional validation.
HZU7A1LTRF-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:
- -
HZU7A1LTRF-E FAQ
1.How can I place an order for HZU7A1LTRF-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZU7A1LTRF-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 HZU7A1LTRF-E reliable?
The price and inventory of HZU7A1LTRF-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZU7A1LTRF-E is usually 5 days.
3.What payment methods are accepted for HZU7A1LTRF-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZU7A1LTRF-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZU7A1LTRF-E?
HZU7A1LTRF-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZU7A1LTRF-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 HZU7A1LTRF-E?
For technical support, including HZU7A1LTRF-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZU7A1LTRF-E requirements.
6.How does Aetrix verify that HZU7A1LTRF-E is sourced from the original manufacturer or authorized distributors?
All HZU7A1LTRF-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 HZU7A1LTRF-E meets industry standards.
7.What is the process for return or replacement of HZU7A1LTRF-E?
All HZU7A1LTRF-E units undergo pre-shipment inspection (PSI). If there is an issue with HZU7A1LTRF-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 HZU7A1LTRF-E part is unused and in its original packaging.
Return procedure for HZU7A1LTRF-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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