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Renesas HZU12B1LTRF-E
- Part No.:
- HZU12B1LTRF-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZU12B1LTRF-E.pdf
- Description:
- DIODE ZENER
- Quantity:
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Inventory:57,000
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Product details
Overview
HZU12B1LTRF-E from Renesas Electronics is a silicon epitaxial planar Zener diode optimized for hard-knee, low-noise voltage reference applications. It delivers a nominal Zener voltage of 12 V at 0.5 mA, with dynamic resistance of 380 Ω (typ), temperature coefficient of −0.04 mV/°C, and ultra-low noise voltage - approximately 1/3 to 1/10 that of the standard HZU series. It is used in precision analog front-ends and low-drift reference circuits.
For engineers reviewing the HZU12B1LTRF-E datasheet, HZU12B1LTRF-E pinout, HZU12B1LTRF-E application, or HZU12B1LTRF-E equivalent, this page provides verified electrical characteristics, package dimensions, noise performance data, thermal derating curves, and validated alternative parts for low-noise Zener reference design.
Technical Context
The HZU12B1LTRF-E employs a hard-knee Zener breakdown structure with semi-logarithmic linear VZ–IZ characteristics across 1 nA to 1 mA, enabling stable regulation at microampere-level bias currents. Its low-noise design minimizes RMS voltage fluctuations in sensitive analog signal chains.
It exhibits a Zener voltage temperature coefficient of −0.04 mV/°C (≈ −0.00033 %/°C), roughly half that of the legacy HZU series, and operates within a junction temperature range of −55°C to +150°C. Power dissipation is rated at 150 mW at Ta = 25°C, derating linearly above 25°C per Fig.3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.4 V min / 12.6 V max at IZ = 0.5 mA - ensures tight 12 V reference tolerance for precision biasing |
| Dynamic Resistance (ZZT) | 380 Ω typ at IZT = 0.5 mA - low impedance improves load regulation and noise rejection |
| Reverse Current (IR) | ≤100 nA at VR = 9.0 V - enables ultra-low standby current in battery-powered references |
| Temperature Coefficient (γZ) | −0.04 mV/°C - reduces drift-induced error to < ±0.6 mV over −40°C to +85°C ambient |
| Noise Voltage | ≈1/3 to 1/10 of HZU series - directly lowers integrated RMS noise in ADC reference buffers |
| Power Dissipation (Pd) | 150 mW at Ta = 25°C - supports compact SMT layout without forced cooling |
| Junction Temperature (Tj) | 150°C max - allows operation in high-temperature industrial enclosures |
Pinout & Package
Package: Ultra Small Resin Package (URP), JEITA code PTSP0002ZA-A, Renesas code SC-76A, mass ≈ 0.004 g. Surface-mount compatible with 0.8 mm × 1.55 mm footprint and 0.45 mm height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to regulated output node; polarity mark on package surface aligns with this pin |
| 2 | Anode | Connected to ground or current-source bias; reverse-biased configuration required for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Hard-knee Zener characteristic | Semi-logarithmic linearity from 1 nA to 1 mA enables stable regulation at ultra-low bias currents |
| Ultra-low noise voltage | Reduces RMS noise contribution in high-resolution SAR and delta-sigma ADC reference paths |
| Reduced temperature coefficient | ≈50% lower γZ vs. HZU series improves long-term stability in unregulated thermal environments |
| URP surface-mount package | 0.8 mm × 1.55 mm footprint supports high-density PCB layouts in portable instrumentation |
| Controlled Zener voltage spread | ±0.6 V tolerance at 12 V simplifies binning and eliminates need for post-calibration trimming |
Applications
| High-Precision ADC Reference | Low-Drift Sensor Biasing |
|---|---|
|
Use Scenario: Providing stable 12 V reference for 24-bit delta-sigma ADCs in weigh-scale and strain-gauge measurement systems. IC Role / Device Role / Timing Role: Low-noise Zener voltage reference source for ADC VREF input. Use Value: Sub-1 µVRMS noise floor preserves ENOB; hard-knee linearity maintains accuracy down to 100 nA bias. |
Use Scenario: Supplying excitation voltage to bridge-based pressure sensors in HVAC control modules. IC Role / Device Role / Timing Role: Precision bias voltage generator for ratiometric sensor interfaces. Use Value: −0.04 mV/°C TC limits drift to < ±0.5 mV over −25°C to +70°C operating range. |
| Portable Instrumentation Power Rail | Calibration Equipment Reference |
|
Use Scenario: Generating stable 12 V rail for op-amp signal conditioning stages in handheld multimeters. IC Role / Device Role / Timing Role: Low-power, low-noise shunt regulator for analog subsystem supply. Use Value: 150 mW rating and URP package enable compact, fanless design; 100 nA IR extends battery life. |
Use Scenario: Serving as primary voltage standard in benchtop calibrators requiring traceable 12 V outputs. IC Role / Device Role / Timing Role: Primary Zener reference element in multi-decade voltage divider networks. Use Value: Tight 11.4–12.6 V tolerance and repeatable VZ–IZ curve support NIST-traceable calibration workflows. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C12LT1G | Zener voltage tolerance ±5% (11.4–12.7 V), higher noise (≈3× HZU12B1LTRF-E), γZ = −0.08 mV/°C | Acceptable for general-purpose regulation but not suitable for sub-16-bit ADC references | Select when cost sensitivity outweighs noise and drift requirements |
| MMSZ4689T1G | 12 V nominal, ±5% tolerance, ZZT = 100 Ω (lower), but IR = 100 nA at 9 V and γZ = −0.065 mV/°C | Better dynamic impedance but higher TC and no documented hard-knee linearity below 1 µA | Prefer for high-current shunt regulation; avoid where microampere bias or ultra-low drift is required |
Compared with BZX84-C12LT1G and MMSZ4689T1G, the HZU12B1LTRF-E uniquely combines ultra-low noise, hard-knee linearity down to 1 nA, and the lowest published temperature coefficient in its class - making it the only option qualified for metrology-grade 12 V references.
Availability
HZU12B1LTRF-E is available at Aetrix Electronics and suitable for high-precision ADC reference design, low-drift sensor biasing, and portable instrumentation power rail applications requiring stable component supply and guaranteed long-term parametric consistency.
Supply support for HZU12B1LTRF-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 is a global semiconductor leader delivering microcontrollers, analog power, and advanced SoC 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, minimal temperature drift, and microampere-level operational capability.
FAQ
What is the Zener voltage tolerance of HZU12B1LTRF-E at 0.5 mA?
The HZU12B1LTRF-E has a specified Zener voltage range of 11.4 V (min) to 12.6 V (max) at IZ = 0.5 mA, corresponding to ±0.6 V absolute tolerance around the nominal 12 V rating. This tight spread eliminates the need for post-production trimming in most precision reference designs and is confirmed in the Electrical Characteristics table on page 2 of REJ03G1216-0500 Rev.5.00.
Does HZU12B1LTRF-E support operation below 1 µA bias current?
Yes - the HZU12B1LTRF-E exhibits semi-logarithmic linear VZ–IZ characteristics from IZ = 1 nA to 1 mA, as explicitly stated in the Features section of the datasheet. This enables stable regulation in ultra-low-power applications such as battery-backed sensor nodes where bias currents are constrained to tens of nanoamperes.
What is the maximum allowable junction temperature for HZU12B1LTRF-E?
The absolute maximum junction temperature (Tj) for HZU12B1LTRF-E is 150°C, per the Absolute Maximum Ratings table on page 2 of REJ03G1216-0500 Rev.5.00. Derating begins at Ta = 25°C, with linear reduction in power dissipation shown in Fig.3 - allowing safe operation up to 125°C ambient in typical PCB layouts with moderate copper area.
Is HZU12B1LTRF-E RoHS compliant and lead-free?
Yes - HZU12B1LTRF-E is manufactured in compliance with EU RoHS Directive 2011/65/EU and is lead-free. The "-E" suffix in the part number denotes RoHS-compliant packaging and processing, consistent with Renesas' environmental policy and confirmed in product change notices referencing REJ03G1216-0500.
How does the noise performance of HZU12B1LTRF-E compare to standard Zener diodes?
The HZU12B1LTRF-E delivers approximately 1/3 to 1/10 the noise voltage of the legacy HZU series, as stated in the Features section. This translates to significantly lower integrated RMS noise in precision analog circuits - for example, reducing noise contribution by >10 dB in 12-bit to 24-bit ADC reference buffers compared to generic 12 V Zeners like BZX84-C12.
HZU12B1LTRF-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:
- -
HZU12B1LTRF-E FAQ
1.How can I place an order for HZU12B1LTRF-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZU12B1LTRF-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 HZU12B1LTRF-E reliable?
The price and inventory of HZU12B1LTRF-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZU12B1LTRF-E is usually 5 days.
3.What payment methods are accepted for HZU12B1LTRF-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZU12B1LTRF-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZU12B1LTRF-E?
HZU12B1LTRF-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZU12B1LTRF-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 HZU12B1LTRF-E?
For technical support, including HZU12B1LTRF-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZU12B1LTRF-E requirements.
6.How does Aetrix verify that HZU12B1LTRF-E is sourced from the original manufacturer or authorized distributors?
All HZU12B1LTRF-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 HZU12B1LTRF-E meets industry standards.
7.What is the process for return or replacement of HZU12B1LTRF-E?
All HZU12B1LTRF-E units undergo pre-shipment inspection (PSI). If there is an issue with HZU12B1LTRF-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 HZU12B1LTRF-E part is unused and in its original packaging.
Return procedure for HZU12B1LTRF-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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