NXP Semiconductors BB182,315

Overview

BB182,315 from NXP Semiconductors is a planar variable capacitance diode (varactor) in an ultra-small SOD523 (SC-79) surface-mount package, designed for VHF tuning applications up to 160 MHz. It delivers Cd(1V) = 52–62 pF, Cd(28V) = 2.48–2.89 pF, Cd(1V)/Cd(28V) ratio of 20.6–22, series resistance rs = 1.0–1.2 Ω at 100 MHz, and ±2 % capacitance matching via Direct Matching Assembly (DMA).

For engineers reviewing the BB182,315 datasheet, BB182,315 pinout, BB182,315 application, or BB182,315 equivalent, key selection criteria include VHF tuning linearity, tight capacitance matching across reverse voltage range, low series resistance for Q-factor preservation, and SOD523 footprint compatibility in space-constrained tuner and VCO designs.

Technical Context

The BB182,315 operates as a voltage-controlled capacitor where junction capacitance varies inversely with applied reverse bias. Its planar silicon structure enables stable, repeatable C-V characteristics from 1 V to 28 V, with typical temperature coefficient below 10⁻³ K⁻¹ across that range.

Capacitance matching is achieved through gliding matching and Direct Matching Assembly (DMA), ensuring ≤2 % deviation in Cd(1V) to Cd(28V) ratio across sequences of 10 diodes - critical for balanced VCO core and multi-stage filter alignment in broadcast tuners.

Key Specifications

Pinout & Package

Package: SOD523 (SC-79), ultra-small plastic surface-mount package with 2 leads, 1.25 × 0.85 mm body size, 0.17 mm lead pitch, cathode marked by bar.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar varactor diode applications.

Compared with BB182,315, BB204,315 offers higher tuning ratio but reduced low-frequency coverage, while SMV1232-011 provides slightly lower series resistance at the cost of 40 % larger PCB area - making BB182,315 optimal for space-constrained Band A tuner modules requiring tight matching and proven VHF stability.

Availability

BB182,315 is available at Aetrix Electronics and suitable for VHF television tuners, voltage-controlled oscillators, and FM radio front-ends requiring stable component supply, matched varactor performance, and ultra-compact SMD packaging.

Supply support for BB182,315 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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer applications.

The BB182,315 belongs to NXP's RF varactor diode product line, engineered specifically for high-linearity, tightly matched VHF tuning in broadcast receiver and wireless communication systems.

FAQ

What is the maximum reverse voltage rating for BB182,315?

The BB182,315 has an absolute maximum reverse voltage (VR) rating of 32 V DC. When used with a 10 kΩ series resistor, it can withstand up to 35 V peak reverse voltage. Exceeding these values risks permanent junction damage per IEC 60134 limiting values. Designers should maintain VR ≤ 28 V during normal operation to ensure long-term reliability and specified capacitance behavior in the BB182,315.

How does BB182,315 achieve ±2 % capacitance matching?

The BB182,315 achieves ≤2 % capacitance matching across reverse voltage range using gliding matching and Direct Matching Assembly (DMA) - a factory-controlled binning and pairing process applied to sequences of 10 diodes. This ensures consistent Cd(1V)/Cd(28V) ratio and C-V slope between matched units, critical for differential VCOs and balanced filter designs. The BB182,315 datasheet confirms this performance under "∆Cd/Cd" in Table 5.

What is the typical series resistance of BB182,315 and why does it matter?

The BB182,315 exhibits a typical series resistance (rs) of 1.0–1.2 Ω measured at 100 MHz with Cd = 30 pF. This low rs preserves high Q-factor (>100) in resonant tank circuits, directly improving VCO phase noise and filter selectivity. Higher rs would increase insertion loss and degrade tuning sensitivity - a key reason the BB182,315 is specified for high-performance VHF applications where signal integrity is critical.

Can BB182,315 be used in UHF applications above 300 MHz?

The BB182,315 is characterized and optimized for VHF operation up to 160 MHz (Band A). While its C-V behavior remains functional at higher frequencies, its series resistance and parasitic inductance limit effective Q-factor above 200 MHz. For UHF tuning, NXP recommends BB204,315 or BB207,315 - devices with lower capacitance and optimized geometry. BB182,315 should not be selected for primary UHF use without empirical validation of tank circuit performance.

What package type does BB182,315 use and how is polarity identified?

The BB182,315 uses the SOD523 (SC-79) ultra-small plastic surface-mount package, measuring 1.25 × 0.85 mm with 0.17 mm lead pitch. Polarity is identified by a marking bar on the cathode end - Pin 1 is cathode, Pin 2 is anode. This matches the simplified outline in Figure 4 and pinning table of the official BB182,315 datasheet, ensuring correct orientation during automated placement and reflow.