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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.

• Refer to switch operational truth table to set the control lines at the proper levels for WiFi TX.

• Turn on

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

• 802.11 b/g/n Receive

• To Receive WiFi 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