RFFM3482Q Datasheet, PDF (11/13 Pages) RF Micro Devices – 2.4GHz to 2.5GHz, Automotive WiFi Front End Module

RFFM3482Q
RFFM3842Q Biasing Instructions:
• 802.11b/g/n Transmit (VB compliance = 5.5V, 400mA, PA EN compliance = 2V, ~450mA)
• Connect the FEM to a signal generator at the input and a spectrum analyzer at the output.
• Bias VB to 3.6V first with PA_EN = 0.0V
• Refer to switch operational truth table to set the control lines at the proper levels for WiFi Tx.
• Turn on PA_EN to 1.8V (typ.). Be extremely careful not to exceed 3.0V on the PA_EN pin, or the part may exceed device cur-
rent limits.
• Turn on PABC to 1.5mA (or 0.6V). For 11b operation Adjust PABC to 1.8mA. This controls the current drawn by the
802.11b/g/n power amplifier and the idle current should rise to ~115mA ± 20mA for a typical part, but it varies based on
the output power desired.
• 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.
I_BIAS Table
WiFi PABC
IEEE 802.11b
IEEE 802.11g
IEEE 802.11n
Standard Modulation
CCK
1.8
54OFDM
1.5
MCS7
1.6
Units
mA
mA
mA
DS121108
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
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