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RF5345TR7 Datasheet(PDF) 6 Page - RF Micro Devices |
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RF5345TR7 Datasheet(HTML) 6 Page - RF Micro Devices |
6 / 20 page 6 of 20 RF5345 DS120215 7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. RF5345 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 VCC to 3.3V 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 2.8V (typ.). VREG controls the current drawn by the 802.11b/g/n power amplifier and the current should quickly rise to ~110mA±20mA for a typical part but it varies based on the output power desired. Be extremely careful not to exceed 3.4V on the VREG 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 *Note: It is recommended that shared mode C_BTB (pin-16) is set to High and the BT radio off for best performance. **Note: Setting LNA_Bias to “low” enables the LNA bypass switch. Therefore, if LNA_Bias is set to “high” during Transmit mode, TX to RX isolation improves. This is an optional setting if additional TX to RX isolation is required for the system. FEM Pin # --> 14 15 16 12 1 CASE MODE C TX C RX C SHARED RX C BT LNA Bias BT RADIO WiFiRX RADIO WiFi TX RADIO 1 WiFi_TX High Low X Low **High or Low OFF OFF ON 2 WiFi_RX Low High *High or Low Low High OFF ON OFF 3 WiFi_RX (bypassed) Low High *High or Low Low Low OFF ON OFF 4 BT_TX Low Low Low High Low ON OFF OFF 5 BT_RX Low Low Low High Low ON OFF OFF 6 WiFi_RX + BT_RX (Shared) Low High High Low High ON ON OFF 7 WiFi_RX + BT_RX (Shared Bypassed) Low High High Low Low ON ON OFF |
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