Renesas HZU11B1LTRF-E

Overview

HZU11B1LTRF-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 11 V at 0.5 mA, exhibits ultra-low dynamic impedance (380 Ω typical at IZT = 3.0 mA), and achieves a temperature coefficient of −0.03 %/°C - approximately half that of the standard HZU series. Its URP (Ultra small Resin Package) supports high-density surface-mount designs in precision analog circuits.

For engineers reviewing the HZU11B1LTRF-E datasheet, HZU11B1LTRF-E pinout, HZU11B1LTRF-E application, or HZU11B1LTRF-E equivalent, key selection criteria include its semi-logarithmic Vz–Iz linearity (1 nA to 1 mA), low noise voltage (~1/3–1/10 of HZU series), and tight Zener voltage tolerance (±0.4 V at 11 V).

Technical Context

The HZU11B1LTRF-E belongs to the HZU-LL Series, engineered specifically for stable, low-drift voltage references where noise and thermal drift are critical. Its Zener voltage is specified at IZ = 0.5 mA with ∆VZ = 0.5 V between 0.05 mA and 0.5 mA, confirming hard-knee behavior and predictable turn-on characteristics.

It 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 per Fig.3. The device uses a silicon epitaxial planar structure to achieve superior reproducibility and low leakage (<100 nA at VR = 9.0 V).

Key Specifications

Pinout & Package

Package: Ultra small Resin Package (URP), JEITA code PTSP0002ZA-A, Renesas code SC-76A, mass ≈ 0.004 g. Dimensions: A1 = 0.15–0.45 mm, A2 = 0.75–1.40 mm, b = 1.55–1.85 mm, D = 0.80 mm, E = 0.80 mm, e1 = 2.30–2.65 mm, l1 = 1.10–1.40 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5242B and BZX84-C11, the HZU11B1LTRF-E offers uniquely validated hard-knee behavior, ultra-low noise, and industry-leading thermal stability - making it the only option among the three qualified for precision micro-power reference design.

Availability

HZU11B1LTRF-E is available at Aetrix Electronics and suitable for precision voltage reference, low-power sensor biasing, and industrial current loop transmitters requiring stable component supply and guaranteed long-term availability.

Supply support for HZU11B1LTRF-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 IoT applications.

The HZU-LL Series was developed specifically for high-stability, low-noise voltage reference applications demanding hard-knee Zener behavior and microamp-level linearity - targeting instrumentation, medical sensors, and precision analog front-ends.

FAQ

What is the nominal Zener voltage and tolerance of the HZU11B1LTRF-E?

The HZU11B1LTRF-E has a nominal Zener voltage of 11 V, with a specified range of 10.6 V (min) to 11.4 V (max) at IZ = 0.5 mA. This ±0.4 V tolerance ensures tight regulation for precision reference applications. The device's hard-knee Vz–Iz curve and low dynamic impedance further enhance accuracy across operating conditions. All values are measured per Renesas REJ03G1216-0500 Rev.5.00.

Does the HZU11B1LTRF-E support operation at very low currents, such as below 1 µA?

Yes, the HZU11B1LTRF-E is explicitly characterized for semi-logarithmic Vz–Iz linearity from 1 nA to 1 mA. Its hard-knee behavior remains stable even at 100 nA, making it suitable for ultra-low-power sensor biasing and energy-harvesting systems. This capability is confirmed in the Electrical Characteristics table and Fig.1 of the HZU11B1LTRF-E datasheet.

What is the temperature coefficient of the HZU11B1LTRF-E, and how does it compare to earlier series?

The HZU11B1LTRF-E exhibits a temperature coefficient of −0.03 %/°C, approximately half that of the standard HZU series. This reduced drift directly improves long-term reference stability in industrial environments. The value is derived from Fig.2 in the HZU11B1LTRF-E datasheet and applies across the full operating temperature range.

Is the HZU11B1LTRF-E RoHS-compliant and lead-free?

Yes, the HZU11B1LTRF-E is RoHS-compliant and lead-free, consistent with Renesas Electronics' environmental policy and the requirements outlined in the REJ03G1216-0500 document. The URP package uses lead-free solderable terminations and conforms to EU RoHS Directive 2011/65/EU and subsequent amendments.

What package type and footprint does the HZU11B1LTRF-E use?

The HZU11B1LTRF-E uses the Ultra small Resin Package (URP), also known as SC-76A or JEITA code PTSP0002ZA-A. Its dimensions include e1 = 2.30–2.65 mm and b = 1.55–1.85 mm, supporting high-density SMT assembly. The cathode is marked on the package, and pin 1 is cathode, pin 2 is anode - matching standard SC-76A orientation.