Renesas HZU5.6ZTRF-E

Overview

HZU5.6ZTRF-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 5.6 V at 0.5 mA, with dynamic resistance of 380 Ω at 3.0 mA and temperature coefficient of −0.03 mV/°C, enabling precision biasing in analog sensor interfaces and instrumentation amplifiers.

For engineers reviewing the HZU5.6ZTRF-E datasheet, HZU5.6ZTRF-E pinout, HZU5.6ZTRF-E application, or HZU5.6ZTRF-E equivalent, key selection criteria include its ultra-low noise voltage (≈1/3–1/10 that of standard HZU series), reduced temperature coefficient (≈1/2 of HZU series), semi-logarithmic V_Z-I_Z linearity from 1 nA to 1 mA, and compatibility with high-density surface-mount layouts using URP package.

Technical Context

The HZU5.6ZTRF-E belongs to the HZU-LL Series, engineered specifically for low-noise voltage reference generation where knee sharpness and thermal stability are critical. Its Zener voltage is specified at I_Z = 0.5 mA, with test conditions confirming DC measurement and semi-logarithmic linearity across seven decades of reverse current (1 nA to 1 mA).

It exhibits a typical dynamic resistance of 380 Ω at I_ZT = 3.0 mA and a maximum Zener impedance of 50 kΩ at I_ZK = 0.5 µA, supporting stable regulation under light-load and transient conditions. The device's temperature coefficient is characterized at −0.03 mV/°C, significantly lower than legacy HZU variants, improving long-term reference accuracy over temperature.

Key Specifications

Pinout & Package

Package: Ultra Small Resin Package (URP), JEITA code PTSP0002ZA-A, SC-76A outline, mass ≈ 0.004 g. Designed for reflow-compatible surface-mount assembly with minimal thermal pad requirements.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener reference applications.

Compared with BZX84-C5V6 and MMSZ5232B, the HZU5.6ZTRF-E provides uniquely low noise, hard-knee linearity, and ultra-low temperature coefficient - making it the only option among the three suitable for high-fidelity analog reference applications demanding sub-millivolt stability.

Availability

HZU5.6ZTRF-E is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, portable medical instrumentation, and test & measurement equipment requiring stable component supply, consistent parametric performance, and RoHS-compliant packaging.

Supply support for HZU5.6ZTRF-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 delivering microcontrollers, analog, power, and connectivity solutions for automotive, industrial, infrastructure, and IoT applications.

The HZU-LL Series was designed specifically for low-noise, hard-knee Zener reference applications in high-precision analog systems - prioritizing voltage stability, thermal drift reduction, and ultra-wide reverse-current linearity.

FAQ

What is the Zener voltage tolerance of HZU5.6ZTRF-E?

The HZU5.6ZTRF-E has a Zener voltage range of 4.9 V to 5.3 V at I_Z = 0.5 mA, corresponding to a ±0.4 V absolute tolerance. This specification is confirmed in the Electrical Characteristics table of the official Renesas datasheet REJ03G1216-0500 Rev.5.00. The HZU5.6ZTRF-E does not use percentage-based tolerance labeling; instead, its binning is defined by discrete min/max limits per the HZU5CLL variant designation.

Does HZU5.6ZTRF-E support operation below 1 µA reverse current?

Yes, the HZU5.6ZTRF-E maintains semi-logarithmic V_Z-I_Z linearity down to 1 nA, as explicitly stated in the Features section of the Renesas datasheet. This enables reliable reference behavior in ultra-low-power sleep modes and energy-harvesting circuits where bias currents fall well below conventional Zener operating ranges. The HZU5.6ZTRF-E is characterized across seven decades of reverse current (1 nA to 1 mA).

What is the thermal resistance of HZU5.6ZTRF-E in its URP package?

The datasheet does not specify junction-to-ambient (θ_JA) or junction-to-case (θ_JC) thermal resistance values for the HZU5.6ZTRF-E. However, its absolute maximum junction temperature is rated at 150°C, and power dissipation is limited to 150 mW at T_a = 25°C, with derating shown in Figure 3. Thermal performance must be validated empirically on the target PCB layout, as URP package thermal behavior depends heavily on copper area and airflow. The HZU5.6ZTRF-E relies on board-level conduction rather than package-defined thermal metrics.

Is HZU5.6ZTRF-E suitable for automotive applications?

No - the HZU5.6ZTRF-E is classified as a Standard-grade Renesas product intended for industrial, office, and consumer equipment per the Quality Grade notice in the datasheet. It is not qualified to AEC-Q101 or rated for automotive temperature ranges (−40°C to +125°C). While it operates up to 150°C junction temperature, its characterization, reliability testing, and screening do not meet automotive requirements. For cabin control modules, use only if explicitly approved under non-safety-critical, non-ASIL conditions and with full system-level validation. The HZU5.6ZTRF-E is not automotive-qualified.

How does the noise performance of HZU5.6ZTRF-E compare to standard Zener diodes?

The HZU5.6ZTRF-E delivers approximately 1/3 to 1/10 the noise voltage of standard HZU-series Zeners, as documented in the Features section of the Renesas datasheet. This improvement stems from optimized epitaxial planar structure and low-noise processing - critical for applications like precision ADC references and low-level sensor biasing. Unlike generic Zeners, the HZU5.6ZTRF-E's noise specification is quantified relative to its family baseline, not absolute dBn or µV/√Hz values, and applies across its operational current range.