ADRF6510ACPZ-R7 datasheet(22/28 Pages) AD

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ADRF6510

Rev. 0 | Page 22 of 28

A complete design example is shown in Figure 54. A third-order

Chebyshev differential filter with a 31 MHz corner frequency

interfaces the output of the ADRF6510 to that of an ADC input.

The 20 Ω source impedance reflects the impedance of the

output buffer stage. The 500 Ω load resistor defines the input

impedance of the ADC. The filter adheres to a 0.1 dB in-band

flatness and offers sufficient out-of-band rejection to act as an

antialiasing filter.

1.8µH

1µH

Figure 54. Third-Order Chebyshev Differential Filter Design Example

Figure 55 and Figure 56 show the measured frequency response

and group delay of the third-order Chebyshev differential filter.

–50

100

120

140

200

180

160

BASEBAND FREQUENCY (MHz)

–45

–40

–35

–30

–25

–20

–15

–10

–5

Figure 55. Third-Order Baseband Filter Response

20 40 60

300

280

260

240

220

200

180

160

140

120

100

BASEBAND FREQUENCY (MHz)

Figure 56. Third-Order Baseband Filter Group Delay Response

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