RF5924_1 Datasheet, PDF (9/14 Pages) RF Micro Devices – 3.7V, SINGLE-BAND FRONT-END MODULE

RF5924
RF5924 Biasing Instructions:
• 802.11b/g Transmit (V_CC compliance=5V, 500mA, V_REG compliance=3V, 20mA)
• Connect the FEM to a signal generator at the input and a spectrum analyzer at the output.
• Bias V_CC to 3.7V first with PA_EN=0.0V
• Refer to switch operational truth table to set the control lines at the proper levels for WLAN TX.
• Turn on PA_EN to 2.7V. PA_EN controls the current drawn by the 802.11b/g power amplifier and the current
should quickly rise to ~180mA±30mA for a typical part but it varies based on the output power desired. Be
extremely careful not to exceed 3.0V on the PA_EN pin or the part may exceed device current limits.
• 802.11 b/g Receive
• To Receive WLAN 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.
Operational Truth Table
Mode
TRSW-P
TRSW-M
ANSW-P
ANSW-M
PA_EN
Bluetooth
L
H
L
H
L
WLAN TX
L
H
H
L
H
WLAN RX
H
L
X*
L
L
Indeterminate
All other states
L
*Note: The state of the ANSW-P is a don’t care. It can be either High or Low, and will yield the same performance.
Rev A6 DS061018
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at ([phone] or [e-mail].
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