Typical performance characteristics

RHF1401

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Typical performance characteristics

Because of its intrinsic high-speed low-power capabilities, most of the characterization

measurements for the RHF1401 were done in the analog frequency range from 1MHz to

100MHz.

An evaluation board designed to operate in this range, and including a transformer to

generate on-board differential signals to input to the RHF1401 was used in characterization

testing. This configuration is illustrated in Figure 21 on page 18.

For best performance, the RHF1401 also requires a high enough sampling frequency or, in

other terms, that the clock period is not too long, to avoid current leakage which would

impact conversion accuracy. The recommended lowest sampling frequency is 1.5Msps.

Note that under 1.2Msps, the RHF1401 performance is degraded. For more information on

sampling frequency, see Section 7.2: Clock signal requirements, and Section 7.3: Power

consumption optimization.

Figure 4.

Figure 5.

65

68

71

74

77

80

0

5

10

15

20

25

30

Fin (Mhz)

11

11.1

11.2

11.3

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11.7

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11.9

12

SINAD

SNR

ENOB

65

68

71

74

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80

515

25

Fin (Mhz)

11

11.2

11.4

11.6

11.8

12

ENO

SINA

SNR

Figure 6.

Figure 7.

-100

-95

-90

-85

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-75

-70

0

5

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Fin (Mhz)

THD

SFDR

-100

-95

-90

-85

-80

-75

-70

5

10

1520

2530

Fin (Mhz)

THD

SFDR