BAP65-05,215 - Dual PIN Diode 30V SOT-23 RF Switch | NXP
MPN: BAP65-05,215 ✓ نشطBAP65-05,215 نظرة عامة
A PIN diode is a silicon semiconductor device with a wide, lightly doped intrinsic layer between P and N regions. In RF systems, it behaves as a current-controlled resistor: under forward bias its RF resistance drops to a few ohms, while under reverse bias it acts as a small, nearly lossless capacitor. This makes PIN diodes the preferred switching and variable-attenuation element in RF front ends, where mechanical relays or FETs would introduce unacceptable distortion or capacitance.
Key features of the BAP65-05 include two elements sharing a common cathode, enabling series-SPDT and series-shunt switch topologies in a single 3-pin package; low diode capacitance that minimizes off-state feedthrough at VHF through microwave frequencies; and low forward resistance that reduces on-state insertion loss. The 30 V breakdown rating supports RF switch stacks in higher-voltage PA bias switching and TDD radios.
Because both diodes share one die-level structure, RF designers achieve matched on-resistance and capacitance between series and shunt arms, improving switch isolation symmetry. The SOT-23 footprint keeps parasitic inductance low, and the device is supplied in Tape & Reel (suffix ,215) for automated pick-and-place assembly.
Typical applications include antenna RF switch matrices, transmit/receive switching in wireless transceivers, RF attenuator networks, and broadband RF switching in test instrumentation.
Design consideration: PIN diode carriers (stored charge) determine switching speed and low-frequency distortion; keep forward bias current sufficiently high for the RF signal amplitude to avoid intermodulation.
This page synthesizes distributor pricing, drop-in alternative analysis, pinout data, and practical RF design notes not found in the manufacturer datasheet.
بدائل مباشرة لـ BAP65-05,215 — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
BAP65-05
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
BAP65-05W
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
BAP70-05,215
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
BAP65-05,215 الحدود القصوى والخصائص الكهربائية
| Diode Type | PIN - 1 Pair Common Cathode |
| Reverse Voltage (VR) | 30 V |
| Maximum Forward Current | 100 mA |
| Power Dissipation | 250 mW |
| Diode Capacitance | 0.425 pF @ 20 V, 1 MHz |
| Configuration | Two elements, common cathode |
| Application | RF switch / attenuator (current-controlled RF resistor) |
| Breakdown Voltage | 30 V |
| العلبة | SOT-23 (TO-236AB) |
| نوع التركيب | Surface Mount |
| Packaging | Tape & Reel (TR), suffix ,215 |
| Technology | Silicon PIN |
| Forward Resistance | Low diode forward resistance (low loss) |
| حالة RoHS | Compliant |
تكوين أطراف BAP65-05,215
| دبوس 1 | A1 — Anode of diode 1 |
| دبوس 2 | K — Common cathode of both diodes |
| دبوس 3 | A2 — Anode of diode 2 |
التطبيقات النموذجية
BAP65-05,215 مناسب لـ 6 التطبيقs: Antenna RF Switch Matrix, T/R Switching in Wireless Transceivers, Voltage-Variable RF Attenuators, Broadband Test and Measurement Switching, PA Bias Switching and RF Power Control, RF Front-End Protection and Limiting.
Antenna RF Switch Matrix
The BAP65-05,215 fits antenna switching matrices because its dual common-cathode structure provides a matched series/shunt diode pair in one SOT-23 package, keeping series-arm and shunt-arm on-resistance symmetric. Its 0.425 pF off-state capacitance at 20 V bias limits off-port feedthrough at VHF/UHF, while low forward resistance minimizes insertion loss in the conducting path. The 30 V rating handles typical receiver-side RF swings plus bias. Placed directly at the antenna port with bias via RF chokes and DC-blocking capacitors, the part implements SPDT or SPnT cells with isolation dominated by package parasitics rather than the diode itself, enabling compact multi-antenna front ends in radios and IoT gateways.
موصى به
T/R Switching in Wireless Transceivers
In half-duplex transceivers, the BAP65-05,215 serves as the series-shunt T/R switch element: the series diode conducts during transmit and the shunt diode clamps leakage into the receiver. NXP characterizes the part as a current-controlled RF resistor, so a few mA of forward bias yields low on-resistance and low distortion at the PA output. The common-cathode pinout allows both diodes to be biased from a single control node, simplifying the driver circuit. The 30 V reverse rating must cover the peak RF voltage plus bias under antenna mismatch; for higher-power PAs, the pin-compatible BAP70-05,215 with 50 V rating drops into the same footprint without PCB rework.
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Voltage-Variable RF Attenuators
The BAP65-05,215 is explicitly designed as a high-voltage, current-controlled RF resistor for attenuators. Varying the forward bias current sweeps the PIN diode RF resistance from a few ohms to kilo-ohms, implementing bridged-T or Pi attenuator networks with continuously variable attenuation. Using both diodes from one package guarantees thermal and process tracking between the series and shunt elements, which keeps the attenuator's input/output match stable across the control range. The low 0.425 pF off-capacitance preserves high attenuation states at microwave frequencies. Keep carrier lifetime in mind: at low bias currents the diode introduces distortion, so bias the device well above the RF current amplitude for low IMD in AGC loops.
موصى به
Broadband Test and Measurement Switching
Instrument-grade RF path switching benefits from the BAP65-05,215's combination of low capacitance, low forward resistance, and pin-to-pin matched dual elements. In switch matrices and signal routers inside vector network analyzers, spectrum analyzers, and automated test fixtures, the diode's quasi-linear current-controlled resistance produces less harmonic distortion than FET switches at comparable insertion loss. The SOT-23 footprint contributes only small series parasitic inductance, extending flat bandwidth into the GHz range. Bias networks use RF chokes sized for the lowest operating frequency, and DC-blocking capacitors isolate the control circuitry. The 250 mW dissipation rating suits signal-level rather than power-level switching paths.
موصى به
PA Bias Switching and RF Power Control
PIN diodes like the BAP65-05,215 switch RF power amplifier bias paths and feedback loops because the diode resistance is set by DC control current, decoupling the RF path from digital control lines. In multi-band transmitters, one common-cathode package switches two RF branches with a single bias node. The 30 V rating covers battery-powered PA drain swings in the 2-3 W class; designers should estimate worst-case reverse voltage as peak RF voltage plus bias and select the 50 V BAP70-05,215 for margin. Switching speed is governed by carrier recombination, so for fast TDD turnaround, maintain a small standby forward current to purge stored charge and reduce switching transients.
موصى به
RF Front-End Protection and Limiting
The BAP65-05,215 works as an RF limiter element protecting sensitive LNAs: at small signals the unbiased diode appears as 0.425 pF and passes the signal with minimal loss, while during strong-signal events the rectified diode current self-biases it into conduction, reflecting the surge away from the receiver input. Its low forward resistance clamps efficiently, and the dual common-cathode configuration enables anti-series limiter pairs that cancel even-order distortion. Place the diode a quarter-wave from the LNA input with a shunt short stub to create the classic PIN limiter topology. Verify the 30 V rating against the expected maximum incident power and antenna mismatch scenarios in your link budget.
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ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ BAP65-05,215 — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | BAP65-05 | BAP65-05W | BAP70-05,215 |
|---|---|---|---|---|
| Package | SOT-23 (TO-236AB) | SOT-23 (TO-236AB) - same | SOT-23 (TO-236AB) - same | SOT-23 (TO-236AB) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Reverse Voltage | 30 V | 30 V | 30 V | 50 V |
| Maximum Forward Current | 100 mA | 100 mA | 100 mA | 100 mA |
| Power Dissipation | 250 mW | 250 mW | 250 mW | 250 mW |
| Configuration | Dual common cathode | Dual common cathode | Dual common cathode | Dual common cathode |
| Primary Application | RF switch / attenuator | RF switch / attenuator | RF switch / attenuator | RF switch / attenuator (high voltage) |
أبرز الفروقات
- Lowest-cost dual common-cathode PIN pair in the NXP RF diode family (مقابلBAP70-05,215)
- Low off-state capacitance preserves isolation at RF (مقابلBAP65-05W)
- Dual elements on one die guarantee series/shunt tracking (مقابلTwo discrete single-diode parts)
ملاحظات التصميم
PIN diode distortion is dominated by stored charge (carrier lifetime) relative to RF signal current. To keep intermodulation low, bias the BAP65-05,215 with DC forward current well above the peak RF current amplitude in the diode; a common rule of thumb is ID >= 10x the RF peak current for audio-band RF modulation with low IMD. In attenuator designs, remember the resistance-vs-current slope is nonlinear at low bias - reserve the lowest few mA of control current for coarse attenuation only.
Keep the RF path traces at the SOT-23 pins as short and wide as feasible; the package lead inductance (roughly 1-2 nH) sets the upper-frequency insertion-loss floor. Route bias feeds through RF chokes or high-value resistors whose impedance is at least 10x the diode RF resistance at the lowest operating frequency, and use DC-blocking capacitors with self-resonant frequency above the band. Place a via fence to ground near the cathode bias network to contain RF leakage from the control node.
The most frequent failure mode is exceeding the 30 V reverse rating: worst-case antenna SWR can multiply the peak RF voltage at the diode by 2x or more, so compute reverse voltage as (peak RF voltage x VSWR factor) + DC bias before committing to the BAP65-05. If the estimate exceeds 30 V, the pin-compatible BAP70-05,215 (50 V) drops onto the same land pattern with no layout change. Also avoid driving the diode into thermal runaway in CW operation: 250 mW at SOT-23 theta-JA requires verification of junction temperature at maximum ambient.
معلومات الامتثال
The ,215 ordering suffix denotes NXP's standard lead-free, RoHS-compliant Tape & Reel product. REACH, halogen-free, and conflict-minerals declarations not present in retrieved data - obtain certificates from NXP.
