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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.

Figure 7. Shared Mode Control Settings and Signal Flow

During share mode, the impedance of the port in operation is consistent even if the other radio is turn off. By having one of the

radios off, that port presents a high impedance to the other port allowing performance optimization of the port in operation.

The simultaneous (at each BT and RX ports) typical gain is 8dB with a total current consumption of about 6mA.

Once again, the supply voltage for the LNA (Vdd) is provided through the LNA_Bias (pin 1) which simultaneously turns the LNA

bypass switch “OFF” and sets the device in High Gain mode. All unused control lines and RF Ports must be properly terminated.

SHARED BYPASSED MODE

This operating mode is similar to the normal Shared Mode. The main difference is that the LNA bypass switch is enabled by

applying 0v to the LNA_Bias pin. See figure 8 below.

Case

Mode

C_TX

C_RX

C_Shared_RX

C_BT

LNA_Bias

6

Shared WiFi/BT RX

LOW*

HIGH

HIGH

LOW*

HIGH

*These controls must be set to a logic low or grounded. Do not leave floating.

8

7

6

5

1

2

3

4

12

11

10

9

13

14

15

16

LNA_Bias

RX_OUT

TX_IN

Vreg

C_BT

ANT

GND

VCC_2