RF5325 Datasheet, PDF (9/12 Pages) RF Micro Devices – 3.3V, 2.4GHZ 802.11b/g/n WIFI FRONT END MODULE

RF5325
RF5325 Biasing Instructions:
• 802.11b/g/n Transmit
• Connect the FEM to a signal generator at the input and a spectrum analyzer at the output.
• Bias V_CC to 3.3V first with V_REG=0.0V
• Refer to switch operational truth table to set the control lines at the proper levels for WiFi TX.
• Turn on V_REG to 2.85V (typ.). V_REG controls the current drawn by the 802.11b/g/n 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
extremely careful not to exceed 3.4V on the V_REG pin or the part may exceed device current limits.
• 802.11 b/g/n 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
C_RX
C_TX
C_BT Mode
L
L
H
Bluetooth^®
L
H
L
WiFi TX
H
L
L
WiFi RX
H
L
H
WiFi RX and BT RX mode
*The FEM can simultaneously receive WiFi and Bluetooth^® in the WiFi RX and BT RX Mode.
DS110618
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
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