NXP Semiconductors BAP65LX,315

Overview

BAP65LX from NXP Semiconductors is a silicon PIN diode optimized for RF switching and attenuation in compact SMD designs, featuring 0.37 pF diode capacitance at 20 V reverse bias, 0.35 Ω forward resistance at 100 mA, and AEC-Q101 qualification for automotive-grade reliability. It operates as a voltage-controlled RF resistor in series-switch configurations for mobile transceivers and TV tuner band selection.

For engineers reviewing the BAP65LX datasheet, BAP65LX pinout, BAP65LX application, or BAP65LX equivalent, key selection criteria include its ultra-low series inductance (0.4 nH), sub-1 dB insertion loss at 2.45 GHz under 100 mA bias, isolation >3.9 dB at 2.45 GHz in off-state, and compatibility with high-frequency PCB layouts requiring minimal parasitic impact.

Technical Context

The BAP65LX employs a planar PIN structure with intrinsic region engineered to balance charge carrier lifetime (0.18 μs) and RF performance across 900 MHz–2.45 GHz bands. Its low forward resistance and capacitance enable efficient on-state conduction and off-state isolation without external tuning components.

Designed for current-controlled RF switching, the device uses DC bias to modulate RF impedance between ~0.35 Ω (on) and >10 kΩ (off), supporting both series and shunt topologies. The DFN1006D-2 package minimizes parasitic inductance and enables direct integration into 50 Ω microstrip lines.

Key Specifications

Pinout & Package

Package: DFN1006D-2 (SOD882D), leadless ultra-small plastic SMD package; body dimensions 1.0 × 0.6 × 0.4 mm; cathode indicated by marking bar.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMP1320-079LF and BAT64-06W, the BAP65LX delivers superior 2.45 GHz isolation and lower insertion loss in automotive-qualified form factor, making it the preferred choice for space-constrained, high-frequency, and mission-critical RF switching.

Availability

BAP65LX is available at Aetrix Electronics and suitable for RF attenuators and switches, TV tuner band selection, and mobile communication transmit/receive switch applications requiring stable component supply, consistent parametric performance, and automotive-grade traceability.

Supply support for BAP65LX 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 IoT markets.

The BAP65LX belongs to NXP's RF PIN diode product line, designed specifically for high-frequency switching and attenuation in space-constrained, thermally demanding RF front-end modules.

FAQ

What is the maximum reverse voltage rating for the BAP65LX?

The BAP65LX has a maximum reverse voltage (VR) rating of 30 V, as specified in the Absolute Maximum Ratings table. This rating applies under continuous DC or RF peak conditions and must not be exceeded to prevent junction breakdown. Operation near this limit requires careful thermal management, especially at elevated ambient temperatures, since junction temperature must remain within –65 °C to +150 °C limits. The BAP65LX datasheet confirms this value applies directly to the BAP65LX without derating assumptions.

How does the BAP65LX achieve low insertion loss at 2.45 GHz?

The BAP65LX achieves sub-0.07 dB insertion loss at 2.45 GHz through three integrated design features: ultra-low forward resistance (0.35 Ω at 100 mA), minimal series inductance (0.4 nH), and low diode capacitance (0.37 pF). These parameters collectively preserve 50 Ω impedance matching in series-switch configurations without external compensation. Measured data in Figure 4 of the BAP65LX datasheet validates this performance under 100 mA bias, confirming the BAP65LX's suitability for high-efficiency 2.4 GHz ISM-band applications.

Is the BAP65LX qualified for automotive applications?

Yes, the BAP65LX is explicitly AEC-Q101 qualified, as stated in Section 1.2 of the official NXP datasheet. This qualification covers stress testing for temperature cycling, humidity, mechanical shock, and high-temperature operating life-ensuring reliability in automotive infotainment, telematics, and antenna module applications. The BAP65LX's junction temperature range (–65 °C to +150 °C) and solder-point thermal resistance (78 K/W) further support deployment in under-hood and dashboard environments where the BAP65LX operates continuously.

What does the marking code '1001' indicate on the BAP65LX package?

The marking code '1001' on the BAP65LX corresponds to the binary marking scheme defined for the SOD882D package in NXP's documentation. Per Figure 1 of the BAP65LX datasheet, this four-bit code identifies the device type and vendor; the cathode bar adjacent to pin 1 serves as the polarity indicator. This marking is standardized across NXP's DFN1006D-2 devices and enables automated optical inspection and traceability-critical for high-volume manufacturing where the BAP65LX is used in RF front-end assemblies.

Can the BAP65LX be used in shunt-switch configurations?

Yes, the BAP65LX supports shunt-switch configurations, though its primary characterization in the datasheet focuses on series-switch performance. In shunt mode, the device connects between RF line and ground, leveraging its low capacitance (0.37 pF at 20 V) for high off-state impedance and low forward resistance for effective RF shorting when biased. Layout must maintain symmetric grounding and minimize bond wire inductance to preserve the BAP65LX's 0.4 nH series inductance advantage, as confirmed by measurement data in Figures 4 and 5 of the BAP65LX datasheet.