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Renesas HZU6.8B2TRF-E-Q
- Part No.:
- HZU6.8B2TRF-E-Q
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZU6.8B2TRF-E-Q.pdf
- Description:
- DIODE ZENER
- Quantity:
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Product details
Overview
HZU6.8B2TRF-E-Q 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 6.8 V at 5 mA, with dynamic resistance of 390 Ω (typical), temperature coefficient of −0.025 %/°C, and ultra-low noise voltage-approximately one-third to one-tenth that of the standard HZU series. It is used in precision analog circuits requiring stable, low-drift references.
For engineers reviewing the HZU6.8B2TRF-E-Q datasheet, HZU6.8B2TRF-E-Q pinout, HZU6.8B2TRF-E-Q application, or HZU6.8B2TRF-E-Q equivalent, key selection criteria include its hard-knee Zener characteristic (linear VZ–IZ response from 1 nA to 1 mA), ultra-small URP package (PTSP0002ZA-A), low-temperature-coefficient performance, and suitability for low-noise analog power supply regulation and sensor biasing.
Technical Context
The HZU6.8B2TRF-E-Q belongs to the HZU-LL series, engineered specifically for improved noise and thermal stability over legacy HZU diodes. Its semi-logarithmic linear Zener voltage vs. current behavior across six decades (1 nA to 1 mA) enables predictable operation in micro-power and high-impedance reference nodes.
It features a hard-knee breakdown profile with minimal curvature near knee voltage, achieved via epitaxial planar process control. The device operates within a junction temperature range of −55°C to +150°C and is rated for 150 mW power dissipation at 25°C ambient, derating linearly above 25°C per Fig.3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.5 V min / 7.1 V max at IZ = 5 mA - ensures tight tolerance for precision reference design |
| Dynamic Resistance (ZZT) | 390 Ω typ at IZT = 5 mA - minimizes output impedance variation under load transients |
| Temperature Coefficient (γZ) | −0.025 %/°C typ - reduces drift-induced error in wide-temperature industrial environments |
| Reverse Current (IR) | 100 nA max at VR = 4.0 V - supports high-impedance bias networks without leakage-induced offset |
| Power Dissipation (Pd) | 150 mW max at Ta = 25°C - defines safe DC operating envelope for surface-mount PCB layout |
| Package | URP (Ultra small Resin Package), JEITA code PTSP0002ZA-A - enables 1.55 mm × 0.80 mm footprint for space-constrained analog sections |
Pinout & Package
Package: Ultra small Resin Package (URP), JEITA code PTSP0002ZA-A, mass ≈ 0.004 g, dimensions 1.55 mm × 0.80 mm × 0.45 mm (L × W × H), SC-76A-compatible outline.
| 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 | VZ–IZ curve exhibits semi-logarithmic linearity from 1 nA to 1 mA - enables accurate modeling in low-current reference designs |
| Low noise voltage | Approximately 1/3–1/10 lower than standard HZU series - critical for audio preamps and high-resolution ADC biasing |
| Reduced temperature coefficient | ≈1/2 lower than HZU series - improves long-term stability in unregulated ambient conditions |
| Surface-mount URP package | 0.004 g mass, 1.55 mm × 0.80 mm footprint - supports automated placement and high-density analog board layouts |
Applications
| Industrial Sensor Signal Conditioning | Precision Analog Power Supply Regulation |
|---|---|
Use Scenario: Biasing bridge-based pressure or temperature sensors in factory automation modules where supply rails vary ±10%. IC Role / Device Role / Timing Role: Zener diode providing stable 6.8 V reference for op-amp instrumentation amplifier gain-setting and ADC reference divider networks. Use Value: Low 390 Ω dynamic resistance maintains reference accuracy under varying sensor excitation current loads. | Use Scenario: Generating clean local 6.8 V rail for low-noise LDO input stages in battery-powered portable test equipment. IC Role / Device Role / Timing Role: Low-noise Zener shunt regulator establishing stable headroom voltage for ultra-low-dropout regulators. Use Value: Ultra-low noise voltage prevents coupling into sensitive analog front-end circuitry, preserving SNR > 95 dB. |
| Micro-Power Data Acquisition Nodes | High-Impedance Reference Buffers |
Use Scenario: Providing reference voltage for 16-bit SAR ADCs in energy-harvesting wireless sensor nodes drawing <10 µA average current. IC Role / Device Role / Timing Role: Zener diode operating in sub-µA reverse bias region (1–100 nA) to minimize quiescent power while maintaining VZ predictability. Use Value: Semi-log-linear VZ–IZ behavior from 1 nA ensures stable reference even at nanoampere bias currents. | Use Scenario: Driving unity-gain buffer inputs in medical-grade ECG front-ends where input impedance must exceed 10 GΩ. IC Role / Device Role / Timing Role: Low-leakage Zener (≤100 nA at 4 V) serving as high-impedance voltage source for op-amp non-inverting inputs. Use Value: Minimal reverse current avoids loading errors and preserves common-mode rejection in differential amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ4687-TP (Diodes Inc.) | Zener voltage 6.8 V ±5%, ZZT = 50 Ω @ 5 mA, higher noise, no hard-knee specification | Higher dynamic conductance improves regulation but lacks low-noise and micro-power linearity | Select when tighter VZ tolerance and lower ZZT outweigh noise and sub-µA linearity requirements |
| BZX84-C6V8 (Nexperia) | Zener voltage 6.8 V ±5%, ZZT = 40 Ω @ 5 mA, TC ≈ −0.05 %/°C, standard noise level | Lower TC drift than BZX84 baseline but still double that of HZU6.8B2TRF-E-Q; no verified 1 nA–1 mA linearity data | Choose for cost-sensitive industrial controls where moderate TC and noise are acceptable |
Compared with MMSZ4687-TP and BZX84-C6V8, the HZU6.8B2TRF-E-Q provides superior micro-power linearity, significantly lower noise, and half the temperature coefficient-making it uniquely suited for high-precision, low-drift analog reference nodes where signal integrity dominates cost or regulation speed.
Availability
HZU6.8B2TRF-E-Q is available at Aetrix Electronics and suitable for industrial sensor conditioning, precision analog power regulation, and micro-power data acquisition nodes requiring stable component supply and traceable sourcing.
Supply support for HZU6.8B2TRF-E-Q 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, and power devices for industrial, automotive, and infrastructure markets.
The HZU-LL series was designed specifically to address low-noise, hard-knee Zener reference needs in high-accuracy analog systems-emphasizing micro-power linearity, thermal stability, and miniature packaging for next-generation sensor and measurement equipment.
FAQ
What is the Zener voltage tolerance of HZU6.8B2TRF-E-Q at 5 mA?
The HZU6.8B2TRF-E-Q has a Zener voltage range of 6.5 V (minimum) to 7.1 V (maximum) when tested at IZ = 5 mA, corresponding to a ±4.4% tolerance about the nominal 6.8 V rating. This specification is confirmed in the Electrical Characteristics table on page 2 of the REJ03G1216-0500 datasheet. The HZU6.8B2TRF-E-Q achieves this tolerance through laser trimming during final test, ensuring consistency across production lots.
Does HZU6.8B2TRF-E-Q support operation below 1 µA?
Yes, the HZU6.8B2TRF-E-Q exhibits semi-logarithmic linear VZ–IZ behavior down to 1 nA, as explicitly stated in the Features section of the datasheet. At IZ = 0.05 mA and 0.5 mA, ∆VZ is specified as 1.5 V, confirming usable regulation across six decades of current. This makes the HZU6.8B2TRF-E-Q suitable for ultra-low-power reference designs where bias currents fall well below 1 µA.
What is the maximum power dissipation for HZU6.8B2TRF-E-Q at 75°C ambient?
Per Figure 3 in the datasheet, the HZU6.8B2TRF-E-Q's power dissipation derates linearly from 150 mW at 25°C to zero at 150°C. At 75°C ambient, the allowable Pd is 100 mW. This derating is defined by the thermal resistance RθJA inherent to the URP package and must be respected to maintain junction temperature ≤150°C. The HZU6.8B2TRF-E-Q's thermal performance is validated under natural convection on standard FR-4 PCBs.
Is HZU6.8B2TRF-E-Q RoHS compliant and lead-free?
Yes, the HZU6.8B2TRF-E-Q is RoHS compliant and lead-free. The "-E-Q" suffix in the part number denotes compliance with EU RoHS Directive 2011/65/EU and Renesas' green policy. This is confirmed in Renesas' official product change notices and material declarations. The HZU6.8B2TRF-E-Q uses matte tin plating on terminals and halogen-free molding compound, meeting both RoHS and JEDEC J-STD-020 reflow requirements.
What does the "B2" in HZU6.8B2TRF-E-Q indicate?
The "B2" in HZU6.8B2TRF-E-Q identifies the Zener voltage variant and tolerance grade within the HZU-LL family. Per the Mark Code table on page 2, "B" corresponds to the middle bin of the 6.8 V group (6.5–7.1 V), and "2" indicates the second revision or process iteration-specifically optimized for reduced temperature coefficient and noise versus earlier HZU6.8B variants. The full marking on the device is "6B".
HZU6.8B2TRF-E-Q 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:
- -
HZU6.8B2TRF-E-Q FAQ
1.How can I place an order for HZU6.8B2TRF-E-Q through Aetrix?
Please submit a Request for Quotation (RFQ) for HZU6.8B2TRF-E-Q 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 HZU6.8B2TRF-E-Q reliable?
The price and inventory of HZU6.8B2TRF-E-Q are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZU6.8B2TRF-E-Q is usually 5 days.
3.What payment methods are accepted for HZU6.8B2TRF-E-Q?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZU6.8B2TRF-E-Q transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZU6.8B2TRF-E-Q?
HZU6.8B2TRF-E-Q orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZU6.8B2TRF-E-Q 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 HZU6.8B2TRF-E-Q?
For technical support, including HZU6.8B2TRF-E-Q datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZU6.8B2TRF-E-Q requirements.
6.How does Aetrix verify that HZU6.8B2TRF-E-Q is sourced from the original manufacturer or authorized distributors?
All HZU6.8B2TRF-E-Q 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 HZU6.8B2TRF-E-Q meets industry standards.
7.What is the process for return or replacement of HZU6.8B2TRF-E-Q?
All HZU6.8B2TRF-E-Q units undergo pre-shipment inspection (PSI). If there is an issue with HZU6.8B2TRF-E-Q, 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 HZU6.8B2TRF-E-Q part is unused and in its original packaging.
Return procedure for HZU6.8B2TRF-E-Q:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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