SKYWORKS SKY13418-485LF

SKY13418-485LF is a single-pole eight-throw (SP8T) antenna switch. The high linearity performance and low insertion loss achieved by the SKY13418-485LF make it an ideal choice for main/diversity switching commonly used in LTE-based handsets, data cards, and tablets that employ antenna diversity solutions.

The SKY13418-485LF is part of a scalable product family ranging from SP4T to SP8T switches, supporting up to eight WCDMA/LTE bands:

• SKY13414-485LF SP4T antenna switch (datasheet no. 201689)
• SKY13415-485LF SP5T antenna switch (datasheet no. 201704)
• SKY13416-485LF SP6T antenna switch (datasheet no. 201679)
• SKY13417-485LF SP7T antenna switch (datasheet no. 201661)
• SKY13418-485LF SP8T antenna switch (this datasheet)

The symmetric port design provides flexibility for signal routing in receive diversity as well as higher-power TD-SCDMA/TDD-LTE, WCDMA/FDD, and LTE transceiver applications.

Switching is controlled by three CMOS/TTL-compatible control voltage inputs (V1, V2, and V3). Based on the logic voltage levels applied to the control pins, the ANT pin is connected to one of eight switched RF input/output (I/O) ports (RF1 through RF8) via a low insertion loss path, while the paths between the ANT pin and all other RF pins remain in a high-isolation state. External DC-blocking capacitors on the RF paths are not required unless an external VDC is applied.

The SKY13418-485LF is manufactured in a compact 14-pin 2.0×2.0 mm quad flat no-lead (QFN) package.

The SKY13418-485LF incorporates an internal negative voltage generator and decoder, eliminating the need for external DC-blocking capacitors on the RF ports. No external components are required for normal operation. DC decoupling capacitors may be added on VDD and control lines if necessary.

Switching is controlled by three control voltage inputs V1, V2, and V3. Based on the logic voltage levels applied to the control pins, the antenna pin is connected to one of eight switched RF outputs.

The recommended power-up sequence is:

1. Apply VDD.
2. Apply V1, V2, and V3 voltages.
3. Apply RF input.

The device must be powered down in the reverse order.

• Wideband frequency range: 0.1 to 6.0 GHz
• Low insertion loss: 0.7 dB typical at 2.7 GHz
• High isolation: > 20 dB at 2.7 GHz
• Integrated logic
• Small QFN (14-lead, 2.0×2.0 mm) package (MSL1, 260℃ per JEDEC J-STD-020)

• Any 2G/3G/4G antenna diversity or LTE (TDD/FDD) transceiver system not requiring GSM transmission