Application information

RHF1401

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Figure 23.

Input signal above 10MHz

However, with a higher frequency input signal (for example, in the 10-70MHz range), a high

degraded SNR and THD performance. With an input signal in this range, the recommended

7.4

Low sampling rate recommendations

The RHF1401 offers a wide range of sampling rates from 1.5Msps to 20Msps with the

minimum power consumption. However, under the minimum, the performance of the device

deteriorates. Figure 24 shows the degradation in performance at sampling frequencies

under 1.2Msps. The recommended minimum sampling frequency is 1.5Msps.

20

25

30

35

40

45

5

7

9

1113

1517

1921

Fs (Mhz)

0

20

40

60

80

100

120

140

Ipol_intref

Ipol_extref

Rpol

REFMODE= 0

REFMODE= 1