AD1852

–11–

REV. 0

Figures 9–14 show the calculated frequency response of the

digital interpolation filters. Figures 15–26 show the performance

of the AD1852 as measured by an Audio Precision System 2

Cascade. For the wideband plots, the noise floor shown in the

plots is higher than the actual noise floor of the AD1852. This is

FREQUENCY – kHz

0.001

0

210

12

14

16

20

0.0008

0.0006

0.0004

0.0002

0

–0.0002

–0.0004

–0.0006

–0.0008

–0.001

46

8

18

Figure 9. Passband Response 8

× Mode, 48 kHz Sample

Rate

FREQUENCY – kHz

0.5

–10

5

1015

20253035

40

0.4

0.3

0.2

0.1

0

–0.1

–0.2

–0.3

–0.4

–0.5

Figure 10. 44 kHz Passband Response 4

× Mode, 96 kHz

Sample Rate

FREQUENCY – kHz

2.0

1.5

1.0

0

0

–0.5

–1.0

–2.0

10

20

30

40

50

60

70

80

–1.5

0.5

Figure 11. 88 kHz Passband Response 2

× Mode, 192 kHz

Sample Rate

caused by the higher noise floor of the “High Bandwidth” ADC

used in the Audio Precision measurement system. The two-tone

test shown in Figure 17 is per the SMPTE standard for measur-

ing Intermodulation Distortion.

Typical Performance Characteristics–

FREQUENCY – kHz

0

–60

–100

–160

–20

–40

–80

–120

–140

0

150

200

50

100

250

300

350

Figure 12. Complete Response, 8

× Mode, 48 kHz

Sample Rate

0

0

150

200

–60

–100

50

100

250

–20

–40

–80

–120

–140

300

FREQUENCY – kHz

–160

Figure 13. Complete Response, 4

× Mode, 96 kHz

Sample Rate

FREQUENCY – kHz

0

–60

–120

–160

–40

–20

–80

–100

–140

0

150

200

50

100

250

Figure 14. Complete Response, 2

× Mode, 192 kHz

Sample Rate