RF5725 Datasheet, PDF (9/11 Pages) RF Micro Devices – 2.4GHz TO 2.5GHz SINGLE-BAND FRONT END MODULE

RF5725
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 V_CC to 3.6V 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 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 V_REG 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
Mode
Bluetooth^TM
WiFi Tx
WiFi Rx
WiFi Rx/BT
C_RX
L
L
H
H
C_TX
L
H
L
L
C_BT
H
L
L
H
*The FEM can simultaneously receive WiFi and Bluetooth^TM in the WiFi RX and BT RX Mode.
DS120214
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at ([phone] or [e-mail].
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