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Renesas HZU11A2LTRF-E
- Part No.:
- HZU11A2LTRF-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZU11A2LTRF-E.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
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Inventory:108,000
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Product details
Overview
HZU11A2LTRF-E from Renesas Electronics is a silicon epitaxial planar Zener diode optimized for hard-knee, low-noise voltage reference applications. It delivers 11 V nominal Zener voltage at 0.5 mA, with dynamic resistance of 380 Ω (typ), temperature coefficient of −0.04 %/°C, and ultra-low noise voltage-approximately 1/3 to 1/10 that of standard HZU-series diodes. It is used in precision analog front-ends and metrology-grade instrumentation where stable, quiet biasing is critical.
For engineers reviewing the HZU11A2LTRF-E datasheet, HZU11A2LTRF-E pinout, HZU11A2LTRF-E application, or HZU11A2LTRF-E equivalent, key selection criteria include its semi-logarithmic VZ–IZ linearity from 1 nA to 1 mA, low-temperature-coefficient operation, and suitability for surface-mount low-power reference designs requiring <150 mW dissipation.
Technical Context
The HZU11A2LTRF-E employs a hard-knee Zener breakdown structure with epitaxial planar construction to achieve sharp knee characteristics and minimized noise generation. Its VZ–IZ curve exhibits semi-logarithmic linearity across six decades of current (1 nA to 1 mA), enabling predictable behavior in sub-microamp biasing and high-impedance sensing circuits.
Designed for ambient temperatures up to +125°C derated power dissipation, it maintains junction temperature ≤150°C under specified conditions. Its temperature coefficient is −0.04 %/°C (−0.02 mV/°C), approximately half that of legacy HZU-series diodes, reducing thermal drift in precision references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10.7–11.3 V at IZ = 0.5 mA - defines stable reference point with ±2.8% tolerance for calibration-critical circuits |
| Dynamic Resistance (ZZT) | 380 Ω (typ) at IZT = 0.5 mA - limits output impedance-induced error in buffered reference stages |
| Reverse Current (IR) | ≤100 nA at VR = 9.0 V - ensures minimal leakage in high-Z bias networks and battery-powered sensors |
| Temperature Coefficient (γZ) | −0.04 %/°C (−0.02 mV/°C) - reduces thermal drift to <±0.5 mV over 0–70°C ambient range |
| Power Dissipation (Pd) | 150 mW at Ta = 25°C - supports compact SMT layout without forced cooling in low-power analog modules |
| Junction Temperature (Tj) | 150°C maximum - enables operation in industrial enclosures with limited airflow and elevated ambient temps |
Pinout & Package
Package: Ultra Small Resin Package (URP), JEITA code PTSP0002ZA-A, SC-76A outline, mass ≈ 0.004 g. Surface-mount compatible with 0.8 mm × 1.25 mm footprint and 0.45 mm height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to higher-potential node; reverse-biased terminal where Zener breakdown occurs |
| 2 | Anode | Connected to lower-potential node (typically ground or common return); completes bias path |
Key Features
| Feature | Design Value |
|---|---|
| Hard-knee Zener characteristic | Enables precise threshold detection and stable regulation below 1 µA bias currents |
| Ultra-low noise voltage | Reduces RMS noise by 70–90% vs. HZU series-critical for 24-bit ADC reference buffers |
| Semi-logarithmic VZ–IZ linearity | Supports accurate extrapolation from 1 nA to 1 mA, simplifying low-current calibration algorithms |
| Low temperature coefficient | Halves thermal drift vs. legacy HZU diodes-improves long-term stability in unregulated environments |
Applications
| High-Precision Voltage Reference | Low-Power Sensor Biasing |
|---|---|
Use Scenario: Providing stable 11 V reference for 24-bit delta-sigma ADCs in portable calibration equipment. IC Role / Device Role / Timing Role: Zener diode serves as primary shunt reference, directly setting ADC input full-scale range and offset null point. Use Value: Low noise and hard-knee behavior minimize code spread and integral nonlinearity (INL) errors below 1 LSB. | Use Scenario: Biasing photodiode transimpedance amplifiers in battery-operated gas analyzers. IC Role / Device Role / Timing Role: Supplies ultra-stable reverse bias voltage to photodiode anode while drawing <100 nA leakage current. Use Value: Sub-100 nA leakage and low thermal drift maintain consistent responsivity across temperature and battery discharge cycles. |
| Industrial Current Loop Transmitters | Medical Instrumentation References |
Use Scenario: Generating 11 V reference for 4–20 mA loop-powered transmitter DACs operating in harsh factory environments. IC Role / Device Role / Timing Role: Functions as shunt-regulated voltage source feeding DAC reference input and op-amp bias rails. Use Value: 150 mW rating and 150°C Tj limit allow reliable operation inside sealed enclosures with ambient up to +85°C. | Use Scenario: Establishing calibrated reference for ECG front-end gain stages in Class II medical devices. IC Role / Device Role / Timing Role: Provides low-drift, low-noise DC bias for instrumentation amplifier common-mode control and ADC reference. Use Value: −0.04 %/°C TC and hard-knee response ensure compliance with IEC 60601-2-27 linearity and accuracy requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C11LT1G | Zener voltage tolerance ±5%, TC ≈ −0.08 %/°C, ZZT = 500 Ω (typ), noise not specified | Higher drift and less predictable knee behavior; suitable for non-critical biasing only | Select when cost sensitivity outweighs precision and noise requirements |
| MMSZ5240B-TP | Zener voltage tolerance ±5%, TC ≈ −0.07 %/°C, ZZT = 450 Ω (typ), no published noise data | Lacks documented low-noise performance and hard-knee linearity; limited to general-purpose regulation | Choose for legacy designs where HZU-LL series availability is constrained |
Compared with BZX84-C11LT1G and MMSZ5240B-TP, the HZU11A2LTRF-E provides tighter VZ tolerance (±2.8%), lower TC (−0.04 %/°C), lower ZZT, and verified ultra-low noise-making it uniquely suited for metrology, medical, and high-resolution data acquisition where reference integrity is non-negotiable.
Availability
HZU11A2LTRF-E is available at Aetrix Electronics and suitable for high-precision voltage reference, low-power sensor biasing, and industrial current loop transmitters requiring stable component supply and traceable sourcing.
Supply support for HZU11A2LTRF-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, power, and timing solutions for industrial, automotive, and infrastructure markets.
The HZU-LL series was developed specifically for low-noise, hard-knee Zener reference applications demanding superior voltage stability, ultra-low leakage, and predictable sub-microamp behavior-targeting metrology, medical instrumentation, and precision analog signal chains.
FAQ
What is the Zener voltage tolerance of HZU11A2LTRF-E at 0.5 mA?
The HZU11A2LTRF-E has a Zener voltage range of 10.7 V to 11.3 V at IZ = 0.5 mA, corresponding to a ±2.8% tolerance. This tight specification supports calibration-grade reference designs where absolute voltage accuracy is essential, and is confirmed in the REJ03G1216-0500 datasheet Table on Page 2.
Does HZU11A2LTRF-E support operation below 1 µA bias current?
Yes, the HZU11A2LTRF-E exhibits semi-logarithmic VZ–IZ linearity from 1 nA to 1 mA, enabling stable operation down to nanoampere-level bias currents. This behavior is explicitly documented in the Features section and Fig.1 of the REJ03G1216-0500 datasheet.
What is the maximum power dissipation for HZU11A2LTRF-E at 70°C ambient?
At Ta = 70°C, the HZU11A2LTRF-E's maximum power dissipation is derated to approximately 105 mW, calculated using the linear derating slope from Fig.3 (150 mW at 25°C, zero at 150°C). This allows safe use in enclosed industrial modules without active cooling.
Is HZU11A2LTRF-E RoHS compliant and lead-free?
Yes, HZU11A2LTRF-E conforms to RoHS Directive 2011/65/EU and is lead-free. The "-E" suffix in the part number denotes RoHS-compliant packaging, and Renesas confirms environmental compliance per its public declarations and product change notices.
How does the noise performance of HZU11A2LTRF-E compare to standard Zener diodes?
HZU11A2LTRF-E delivers approximately 1/3 to 1/10 the noise voltage of standard HZU-series Zeners, as stated in the Features section of REJ03G1216-0500. This ultra-low noise enables use in 24-bit ADC reference buffers and other high-dynamic-range analog circuits where noise floor is limiting.
HZU11A2LTRF-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:
- -
HZU11A2LTRF-E FAQ
1.How can I place an order for HZU11A2LTRF-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZU11A2LTRF-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 HZU11A2LTRF-E reliable?
The price and inventory of HZU11A2LTRF-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZU11A2LTRF-E is usually 5 days.
3.What payment methods are accepted for HZU11A2LTRF-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZU11A2LTRF-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZU11A2LTRF-E?
HZU11A2LTRF-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZU11A2LTRF-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 HZU11A2LTRF-E?
For technical support, including HZU11A2LTRF-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZU11A2LTRF-E requirements.
6.How does Aetrix verify that HZU11A2LTRF-E is sourced from the original manufacturer or authorized distributors?
All HZU11A2LTRF-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 HZU11A2LTRF-E meets industry standards.
7.What is the process for return or replacement of HZU11A2LTRF-E?
All HZU11A2LTRF-E units undergo pre-shipment inspection (PSI). If there is an issue with HZU11A2LTRF-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 HZU11A2LTRF-E part is unused and in its original packaging.
Return procedure for HZU11A2LTRF-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZU11A2LTRF-E Tags
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MM5Z5V1ST1G
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