RF5725 datasheet(9/11 Pages) RFMD

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RF5725

DS120214

7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical

support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.

RF5275 Biasing Instructions:

• 802.11b/g Transmit:

• Connect the FEM to a signal generator at the input and a spectrum analyzer at the output.

•Bias VCC to 3.6V first with VREG=0.0V.

• Refer to switch operational truth table to set the control lines at the proper levels for WiFi TX.

•Turn on VREG to 2.85V (typ.). VREG controls the current drawn bu the 802.11b/g power amplifier and the current should

quickly rise to ~100mA ± 20mA for a typical part but it varies based on the output power desired. Be externally careful not

to exceed 3.4V on the VREG pin or the part may exceed device current limits.

• 802.11b/g Receive

• To receive WiFi set the switch control lines per the truth table below.

• Bluetooth™ Receive

•To receive Bluetooth™ set the switch control lines per the truth table below.

Switch Control Logic

*The FEM can simultaneously receive WiFi and BluetoothTM in the WiFi RX and BT RX Mode.

Mode

C_RX

C_TX

C_BT

BluetoothTM

WiFi Tx

WiFi Rx

WiFi Rx/BT

RF5725 Datasheet(PDF) 9 Page - RF Micro Devices