Renesas HZU7B2LTRF-E

Overview

HZU7B2LTRF-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 7.5 V (min 7.2 V, max 7.8 V) at 5 mA, with dynamic resistance of 400 Ω (typ), reverse current ≤100 nA at 5.4 V, and temperature coefficient of −0.035 %/°C - enabling precision biasing in analog front-ends and sensor signal conditioning circuits.

For engineers reviewing the HZU7B2LTRF-E datasheet, HZU7B2LTRF-E pinout, HZU7B2LTRF-E application, or HZU7B2LTRF-E equivalent, this device is selected where ultra-low noise voltage (≈1/3–1/10 that of standard HZU series), reduced temperature drift (≈1/2 of HZU series), and semi-logarithmic V_Z-I_Z linearity from 1 nA to 1 mA are critical for stable reference performance in compact SMT designs.

Technical Context

The HZU7B2LTRF-E belongs to the HZU-LL Series, engineered specifically for hard-knee Zener behavior with minimized knee curvature and enhanced low-current stability. Its Zener voltage exhibits semi-logarithmic linearity across an exceptionally wide reverse current range (1 nA to 1 mA), supporting accurate modeling in low-power bias networks.

It achieves low-noise operation via epitaxial planar construction and optimized doping profile, resulting in ≈1/3–1/10 lower noise voltage versus legacy HZU-series diodes. Temperature coefficient is tightly controlled at −0.035 %/°C (−2.6 mV/°C), approximately half that of comparable HZU devices, reducing thermal drift in precision references.

Key Specifications

Pinout & Package

Package: URP (Ultra Small Resin Package), JEITA code PTSP0002ZA-A, dimensions 1.70 mm × 0.80 mm × 0.90 mm (L × W × H), mass 0.004 g, surface-mount compatible with reflow soldering per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMSZ4689-TP and BZX84-C7V5, the HZU7B2LTRF-E provides superior low-noise performance, tighter temperature coefficient, and smaller URP footprint - making it preferred for high-resolution analog systems where reference stability and board area are critical.

Availability

HZU7B2LTRF-E is available at Aetrix Electronics and suitable for high-precision ADC reference, low-power sensor biasing, and industrial current loop transmitters requiring stable component supply, consistent parametric performance, and long-term obsolescence management.

Supply support for HZU7B2LTRF-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 SoC solutions for automotive, industrial, and enterprise applications.

The HZU-LL Series was developed by Renesas to address demand for ultra-low-noise, hard-knee Zener diodes in precision analog reference and sensor interface circuits - targeting applications where traditional Zeners exhibit excessive noise or thermal drift.

FAQ

What is the Zener voltage tolerance of the HZU7B2LTRF-E?

The HZU7B2LTRF-E has a Zener voltage range of 7.2 V (minimum) to 7.8 V (maximum) at test current I_Z = 5 mA, corresponding to ±4% tolerance around the nominal 7.5 V rating. This specification is confirmed in the Electrical Characteristics table of Renesas document REJ03G1216-0500 Rev.5.00, and applies strictly to the HZU7B2LTRF-E variant within the HZU-LL Series.

Does the HZU7B2LTRF-E support operation at very low reverse current?

Yes, the HZU7B2LTRF-E exhibits semi-logarithmic V_Z-I_Z linearity from I_Z = 1 nA up to 1 mA, enabling stable reference behavior even in ultra-low-power bias networks. This capability is explicitly documented in the Features section of the HZU-LL Series datasheet (REJ03G1216-0500), distinguishing it from conventional Zeners with poorly defined knee regions below 10 µA.

What is the temperature coefficient of the HZU7B2LTRF-E, and how does it compare to standard Zeners?

The HZU7B2LTRF-E has a temperature coefficient of −0.035 %/°C (−2.6 mV/°C), approximately half that of the legacy HZU series. This value is measured and specified in the Main Characteristic plots (Fig.2) of REJ03G1216-0500 Rev.5.00, confirming its suitability for applications demanding minimal thermal drift without external compensation circuitry.

Is the HZU7B2LTRF-E RoHS compliant and lead-free?

Yes, the HZU7B2LTRF-E is RoHS compliant and lead-free, consistent with Renesas Electronics' environmental policy and the manufacturing standards referenced in REJ03G1216-0500 Rev.5.00. The URP package uses lead-free solder-compatible terminations, and full compliance documentation is available through Renesas' official product change notices and material declarations.

What is the maximum power dissipation for the HZU7B2LTRF-E at 25°C ambient?

The HZU7B2LTRF-E has a maximum power dissipation (P_d) of 150 mW at T_a = 25°C, as specified in the Absolute Maximum Ratings table of REJ03G1216-0500 Rev.5.00. Derating is required above 25°C per Fig.3 (Power Dissipation vs. Ambient Temperature), with junction temperature limited to 150°C.