NF

10log(F)

10log(3.37)

5.28 dB







8

4.7

10

2

10

1

11

1

10

F

1

10

1

F

F

10

3.37

G

10









CC2592

CC2520

NF = 4.7 dB

Gain = 11 dB

NF = 8 dB

CC2592

SWRS159 – FEBRUARY 2014

www.ti.com

4

Sensitivity Improvement Example

Figure 4-1.

The noise factor of a system consisting of the CC2592 device and a CC2520 device, as seen in Figure 4-

1 is given by:

(1)

The noise figure is:

(2)

The noise figure is reduced from 8 dB for the CC2520 standalone to 5.28 dB for the CC2592 and CC2520

device combination, leading to a 2.72-dB theoretical improvement in sensitivity.

In practice, tests on the CC2592 and CC25XX devices show around 3-dB improvement in sensitivity. For

the CC2538 and CC2592 devices, the improvement is almost 4 dB (approximately –97 dBm to –101 dBm)

8

Sensitivity Improvement Example

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