Circuit Note

CN-0523

analog.com

Rev. 0 | 3 of 8

Figure 5. CN0523 Noise Figure vs. Frequency

Figure 6 shows the single sideband phase noise at 5.8 GHz, with

offset values of approximately -114.91 dBc/Hz,-117.77 dBc/Hz, and

-130.48 dBc/Hz at 10 kHz, 100 kHz, and 1 MHz, respectively.

Figure 6. CN0523 Single Sideband Phase Noise at 5.8 GHz Input

Figure 7 presents the narrow-band single-tone RF output with an

SFDR of 81 dB at an input power level of -2 dBm.

Figure 7. CN0523 Narrowband Single Tone RF Output

Figure 8 shows the output power (POUT) vs. input power (PIN) graph

of the CN0523. The CN0523 has a saturation point of approximate-

ly +27 dBm and has an absolute maximum input power of +10

dBm. It is not recommended to operate the circuit above this input

level as damage may incur.

Figure 8. CN0523 Output Power vs. Input Power at 5.8 GHz Input

The system is stable across the entire 5.8 GHz ISM frequency

bandwidth with the Rollet's stability factor (k) being above 1 and

the supplementary stability measure (B1) being above 0, as shown

in Figure 9. This makes the CN0523 unconditionally stable for any

combination of source and load impedance.