ADS-944

6

®

®

1

10

100

1000

10000

Frequency (kHz)

90

80

70

60

50

40

30

20

10

0

1

10

100

1000

10000

Frequency (kHz)

80

70

60

50

40

30

20

10

0

1

10

100

1000

10000

Frequency (kHz)

80

70

60

50

40

30

20

10

0

1

10

100

1000

10000

Frequency (kHz)

90

80

70

60

50

40

30

20

10

0

PH vs. Input Frequency

SNR vs. Input Frequency

SNR+D vs. Input Frequency

THD vs. Input Frequency

Figure 4. Typical ADS-944 Dynamic Performance vs. Input Frequency at +25°C

Figure 5. ADS-944 FFT

Figure 6. ADS-944 Histogram and Differential Nonlinearity

0

–10

–20

–30

–40

–50

–60

–70

–80

–90

–100

–110

–120

–130

–140

0

250

500

750

1

1.25

1.5

1.75

2.0

2.25

2.5

kHz

kHz

kHz

MHz

MHz

MHz

MHz

MHz

MHz

MHz

Frequency

(fin = 2.45MHz, fs = 5MHz, Vin = –0.5dB, 16,384 points)

0

Digital Output Code

0

16,384

+0.33

0

–0.55

16,384

DNL (LSB's)

Digital Output Code