SKY13522-644LF-EVB - 0.7-3GHz SPDT Switch Evaluation Board | Skyworks
料号： SKY13522-644LF-EVB ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $95 | $95.00 |
| 10 | $85.5 | $855.00 |
| 25 | $80 | $2,000.00 |
| 50 | $73 | $3,650.00 |
| 100 | $66 | $6,600.00 |
SKY13522-644LF-EVB 概述
An RF switch (SPDT) is a semiconductor device that routes a single RF input to one of two RF output paths under logic-level CMOS control, enabling transmit/receive duplexing, antenna band selection, or diversity switching in a wireless front-end module. As part of the broader RF front-end (RFFE) hierarchy, the SPDT sits between the antenna or filter bank and the transceiver chain, and is typically controlled directly by the transceiver's GPIO or RFFE bus. Compared to mechanical relays, solid-state GaAs pHEMT-based SPDTs switch in tens of nanoseconds, draw only a few microamperes of quiescent current, and integrate into the same reflow-soldered PCB as the surrounding ICs.
Key electrical characteristics of the underlying SKY13522-644LF device include a single-bit CMOS control interface that minimizes GPIO overhead, low insertion loss typically in the 0.4-0.6 dB range at 1-2 GHz, and high port-to-port isolation near 47 dB at 2.2 GHz, enabling signal chains to maintain dynamic range. The 50 ohm matched ports eliminate external matching networks and simplify board-level integration.
The silicon implementation uses Skyworks' GaAs pHEMT switching process, which provides the linearity required for cellular power levels up to roughly +30 dBm, low DC power consumption with a few microamperes of quiescent current, and a single positive supply between approximately 2.5 V and 5.0 V. The 8-pin QFN (1.1 x 1.1 mm) exposed-pad package offers a low-inductance ground reference and excellent thermal performance for the small die area. The evaluation board hosts the IC on a calibrated FR4 substrate with SMA connectors and controlled-impedance traces so engineers can directly probe RF performance and control logic using standard laboratory instruments.
Typical use cases for the SKY13522-644LF and its evaluation board include cellular handset transmit/receive switching, Wi-Fi/Bluetooth module antenna multiplexing, front-end module development for IoT and wearables, and reference designs for sub-6 GHz cellular and short-range radio platforms. The 0.7-3 GHz range matches cellular low-band, mid-band, 2.4 GHz ISM, and 2.6 GHz LTE/Wi-Fi bands.
When designing with this part, drive the CMOS control pin from a clean logic rail (typically 1.8 V or 3.3 V) and place the control trace away from RF paths to avoid coupling. The exposed paddle of the QFN must be soldered to a continuous ground plane with multiple thermal vias for stable RF ground reference.
This page synthesizes distributor availability, Skyworks' suggested replacement guidance, and EVB-related design notes that complement but do not replace the underlying SKY13522-644LF datasheet.
直接替换替代料： SKY13522-644LF-EVB ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： SKY13522-644LF-EVB （相同外形与封装尺寸） ——差异在于 Isolation.
快速对比工具——选择替代料号进行并排对比：
SKY13446-374LF
✅ 直接替换📋 参考替代料（不在目录中）
SKY13453-385LF
✅ 直接替换📋 参考替代料（不在目录中）
SKY13499
✅ 直接替换📋 参考替代料（不在目录中）
SKY13473
✅ 直接替换📋 参考替代料（不在目录中）
GRF1102
✅ 直接替换📋 参考替代料（不在目录中）
SKY13522-644LF-EVB 最大额定值与电气特性
| Product Type | Evaluation Board for RF SPDT Switch |
| Underlying IC | SKY13522-644LF |
| Switch Configuration | SPDT (Single-Pole, Double-Throw) |
| Frequency Range | 0.7 GHz to 3 GHz |
| RF Impedance | 50 ohm single-ended |
| Control Interface | Single-bit CMOS logic |
| Isolation | 47 dB at 2.2 GHz |
| IC Package | 8-pin QFN (1.1 x 1.1 mm) |
| Target Applications | CDMA, GSM, WCDMA cellular switching |
| EVB Connectors | SMA (RF ports), header/pin (logic/supply) |
| EVB Substrate | FR4 with controlled-impedance RF traces |
| Operating Temperature (IC) | -40C to +85C |
| RoHS 状态 | Compliant |
| Lifecycle Note | Underlying IC SKY13522-644LF discontinued by Skyworks; EVB subject to remaining stock |
SKY13522-644LF-EVB 引脚配置
| 引脚 1 | GND — Ground (exposed paddle is the primary low-inductance ground return) |
| 引脚 2 | RF1 — RF port 1 (50 ohm, switched to ANT via control logic) |
| 引脚 3 | GND — Ground pin adjacent to RF1 |
| 引脚 4 | RF2 — RF port 2 (50 ohm, switched to ANT via control logic) |
| 引脚 5 | GND — Ground pin adjacent to RF2 |
| 引脚 6 | ANT — Antenna (common) RF port - 50 ohm |
| 引脚 7 | VDD — Positive DC supply (logic/switch bias) |
| 引脚 8 | CTRL — CMOS single-bit control input (selects RF1 or RF2 path) |
典型应用
SKY13522-644LF-EVB 适用于 6 应用s: Cellular Transmit/Receive Switch Path, Wi-Fi 2.4 GHz Antenna Multiplexing, IoT Front-End Module (FEM) Development, Antenna Diversity and Receiver Protection Routing, Test Equipment SPDT Calibration and Probe Routing, Automotive Telematics and Telematic Control Unit (TCU).
Cellular Transmit/Receive Switch Path
The SKY13522-644LF-EVB characterizes the SKY13522-644LF SPDT switch used to route a cellular antenna between transmit and receive paths in CDMA/GSM/WCDMA front ends. The host IC's 47 dB isolation at 2.2 GHz and 50 ohm single-ended ports eliminate external matching components, while the 8-QFN (1.1 x 1.1 mm) footprint enables compact handset layouts. On the evaluation board, SMA connectors present controlled-impedance lines to a VNA so engineers can validate insertion loss and isolation before committing the switch to production PCB designs for low-band and mid-band cellular radios.
推荐
Wi-Fi 2.4 GHz Antenna Multiplexing
The SKY13522-644LF-EVB can evaluate a 2.4 GHz Wi-Fi antenna multiplexer or transmit/receive switch in an 802.11 b/g/n or Bluetooth radio, since the switch covers the 0.7-3 GHz range that comfortably includes 2.4 GHz ISM. Engineers can probe S-parameters on the EVB to confirm insertion loss and isolation meet radio sensitivity targets. Note that the part is not optimized above 3 GHz, so 5 GHz Wi-Fi use cases require a wider-band switch like SKY13446-374LF.
推荐
IoT Front-End Module (FEM) Development
The SKY13522-644LF-EVB accelerates development of small-form-factor IoT and wearable front-end modules by offering a characterized SPDT switching platform. The IC's tiny 1.1 x 1.1 mm QFN and a few-microampere quiescent current support battery-powered designs such as asset trackers, smart watches, and BLE beacons. Designers iterate antenna and filter network choices on the EVB before qualifying a module, using its CMOS single-bit control to trigger switch position via a lab MCU GPIO pin.
推荐
Antenna Diversity and Receiver Protection Routing
For multiband cellular radios with multiple antenna elements (primary and diversity paths), the SKY13522-644LF-EVB qualifies a switch that routes the active antenna signal to the appropriate transceiver LNA chain. The high port-to-port isolation protects the receive LNA from leaked transmit power, and single-bit CMOS control simplifies interoperation with the baseband or transceiver GPIO. The evaluation board lets engineers measure isolation across all bands covered by 0.7-3 GHz before selecting the final switch for mass production.
推荐
Test Equipment SPDT Calibration and Probe Routing
Engineers evaluating instrumentation-grade RF chains can use the SKY13522-644LF-EVB as a quick lab SPDT to route signals between calibration standards, probes, or test fixtures up to 3 GHz. The board's SMA connectors and ground-bonded QFN deliver repeatable RF behavior in a desktop test setup. Although the SKY13522-644LF was designed for cellular use, its broadband nature extends to lab-grade routing where a 47 dB isolation switch is sufficient for partition noise isolation in test stations.
推荐
Automotive Telematics and Telematic Control Unit (TCU)
Telematics control units supporting multi-band cellular and short-range radios can leverage the SKY13522-644LF-EVB during qualification to characterize the SPDT in an automotive-grade environment. While the underlying IC is industrial-grade, its low insertion loss and high isolation at sub-3 GHz frequencies suit GNSS and cellular coexistence paths in TCU designs. The EVB allows early performance comparison against the suggested replacement SKY13446-374LF before any telematics hardware redesign.
推荐
推荐产品汇总
工程参考数据： SKY13522-644LF-EVB ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | SKY13446-374LF | SKY13453-385LF | SKY13499 | SKY13473 | GRF1102 |
|---|---|---|---|---|---|---|
| Package | 8-QFN (1.1 x 1.1 mm) on evaluation board | QFN (refer to Skyworks datasheet for pin-compatible package outline) | QFN (refer to Skyworks datasheet for pin-compatible package outline) | QFN (refer to Skyworks datasheet for pin-compatible package outline) | QFN (refer to Skyworks datasheet for pin-compatible package outline) | QFN (refer to Guerrilla RF datasheet for pin-compatible package outline) |
| Brand | Skyworks | Skyworks | Skyworks | Skyworks | Skyworks | Guerrilla RF |
关键差异点
- Tiny 1.1 x 1.1 mm QFN package enables compact handset PCB layouts （对比 Larger same-family Skyworks SPDTs)
- 47 dB isolation at 2.2 GHz protects receive LNA chains in cellular radios （对比 Generic RF switches with 25-30 dB isolation)
- Single-bit CMOS control simplifies GPIO usage on the host MCU/transceiver （对比 Multi-bit parallel-controlled SPDTs)
设计说明
The underlying SKY13522-644LF IC has been discontinued by Skyworks; the SKY13522-644LF-EVB uses these end-of-life ICs. Estimated (based on AVX termination industry norms): EVB inventory should be reserved for legacy prototype validation rather than new product designs, and engineers should transition to the SKY13446-374LF (Skyworks-suggested replacement) for any new production designs. Always confirm remaining inventory with the distributor at time of order.
Estimated: When designing with the SKY13522-644LF (or its suggested replacement), the exposed-paddle QFN ground must be soldered to a continuous copper ground plane with multiple thermal/ground vias to provide a low-inductance RF return. The CMOS control trace should be routed on a separate layer away from RF paths to avoid coupling. Place decoupling capacitance on the VDD pin within 1-2 mm of the pad, using a 0.1 uF ceramic plus a small bulk capacitor to filter both low- and high-frequency supply noise.
For the SKY13522-644LF-EVB, SMA launch transitions should be designed for 50 ohm controlled impedance on the substrate (typically 50 ohm microstrip on FR4 with reference ground plane intact beneath the RF traces). Estimated: keep RF traces short and uniform to maintain VSWR, and calibrate out the test fixture (SMA + traces + connector parasitics) using a network analyzer calibration kit at the desired reference plane before extracting IC-level S-parameters.
合规信息
RoHS/lead-free status confirmed by Skyworks product page for SKY13522-644LF. AEC-Q100 not applicable - underlying IC is not automotive-qualified. Halogen-free status marked 'unknown' as no explicit halogen-free claim is present in the Verified Web Data.
