Skyworks Solutions Inc. SMP1302-087LF

Overview

SMP1302-087LF from Skyworks Solutions is a surface-mount silicon PIN diode optimized for high-power RF switching and low-distortion attenuation in 10 MHz–6 GHz systems. It delivers 125 W CW power handling at 25 °C, exhibits ≤0.35 pF capacitance at 30 V, and maintains ≤1.5 Ω series resistance at 100 mA - enabling use in T/R switches and broadband attenuators.

For engineers reviewing the SMP1302-087LF datasheet, SMP1302-087LF pinout, SMP1302-087LF application, or SMP1302-087LF equivalent, key selection criteria include its 2 × 2 mm QFN package with exposed thermal pad, 22 °C/W junction-to-case thermal resistance, 50 μm I-region width, and verified RF performance up to 2.6 GHz (e.g., 0.38 dB insertion loss with 22 nH bias network).

Technical Context

The SMP1302-087LF operates as a series-connected PIN diode with a nominal 50 μm intrinsic region, enabling large-signal linearity and low distortion in switch/attenuator topologies. Its low parasitic inductance (0.65 nH) and minimal package capacitance support broadband RF operation from 10 MHz to beyond 6 GHz.

Thermally, it features a 1 W dissipation rating at 85 °C and achieves 125 W CW handling at 25 °C via efficient heat transfer through its exposed copper slug. ESD robustness includes CDM 1100 V, HBM 1000 V, and MM 400 V ratings - critical for production handling and system-level reliability.

Key Specifications

Pinout & Package

Package: 2 × 2 mm QFN with 2-pin configuration and thermally enhanced exposed copper slug (pin 1 = anode, pin 2 = cathode). Compliant with JEDEC MSL1 and RoHS/halogen-free standards.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PIN diode switch and attenuator applications.

Compared with MADP-000907-14020T and QPD1025, the SMP1302-087LF offers the lowest capacitance and highest CW power density in a 2 × 2 mm footprint - making it optimal for space-constrained, high-efficiency RF front ends demanding minimal insertion loss and thermal headroom.

Availability

SMP1302-087LF is available at Aetrix Electronics and suitable for cellular infrastructure, Wi-Fi FEMs, and radar transceiver modules requiring stable component supply, consistent RF performance across production lots, and full traceability to Skyworks wafer fabrication.

Supply support for SMP1302-087LF 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

Skyworks Solutions is a global leader in high-performance analog semiconductors for RF, mobile, and infrastructure applications, with expertise in gallium arsenide, silicon, and SOI process technologies.

The SMP1302-087LF belongs to Skyworks' high-power PIN diode product line, engineered specifically for broadband RF switching and attenuation in wireless infrastructure and defense systems where thermal efficiency and signal fidelity are critical.

FAQ

What is the maximum continuous wave (CW) RF power the SMP1302-087LF can handle?

The SMP1302-087LF is rated for 125 W CW RF power handling at +25 °C ambient temperature when mounted on a PCB with adequate thermal grounding. This rating assumes proper heatsinking via the exposed pad and operation within absolute maximum ratings - including ≤200 V reverse voltage and ≤200 mA forward current. Derating is required above 25 °C per the 22 °C/W thermal resistance specification.

Does the SMP1302-087LF require external bias circuitry, and what is the recommended configuration?

Yes, the SMP1302-087LF requires DC bias to control its RF impedance state. The datasheet specifies a standard bias schematic using two 22 nH inductors and 100 pF capacitors for RF decoupling. This configuration achieves 0.38 dB insertion loss and –12.6 dB isolation at 2.6 GHz. Bias voltage must remain within ±200 V, and forward current should not exceed 200 mA.

What is the RF performance of the SMP1302-087LF at 5 GHz, and is it validated in the datasheet?

The SMP1302-087LF datasheet confirms operation "from 10 MHz to beyond 6 GHz" and provides S-parameter plots up to 6 GHz (Figures 5 and 6). At 5 GHz, typical performance includes <0.5 dB insertion loss and >10 dB return loss under 50 mA forward bias, based on extrapolated S21/S11 curves. Full characterization data at 5 GHz is not tabulated but is supported by the device's 0.35 pF capacitance and 0.65 nH inductance.

Is the SMP1302-087LF compatible with lead-free reflow soldering processes?

Yes, the SMP1302-087LF is qualified for lead-free reflow per JEDEC J-STD-020, with Moisture Sensitivity Level 1 (MSL1) rating at 260 °C peak temperature. The package uses halogen-free, Skyworks Green™ compliant materials and requires no pre-baking when sealed packaging is unopened. Standard IPC/JEDEC profiles for Pb-free SAC305 are fully supported.

How does the 50 μm I-region width of the SMP1302-087LF affect its switching speed and linearity?

The 50 μm I-region width in the SMP1302-087LF yields a minority carrier lifetime of 700 ns, striking a balance between switching speed and harmonic suppression. This enables sub-100 ns turn-on/off transitions while maintaining low intermodulation distortion (IMD) in high-PAPR signals - critical for LTE and 5G NR applications where both speed and linearity are required.