AD768 查看數據表（PDF） - Analog Devices

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AD768

16-Bit, 30 MSPS D/A Converter

Analog Devices 

Typical Performance Curves––AADD77668

–0.9405

1.00

–0.9415

–0.9424

–0.9433

RL = 50Ω

VOUT = 0 TO –1V

0.90

0.80

0.70

–0.9443

0.60

–0.9453

0.50

–0.9462

0.40

–0.9472

0.30

–0.9481

0.20

–0.9498

0.10

0.05

–0.9500

0.025

12 14 16 18 20 22 24 26 28 30 32 34 36

TIME – ns

Figure 12. Settling Time

–0.470

–0.472

RL = 50Ω

VOUT = 0 TO –1V

–0.474

–0.476

–0.478

–0.480

–0.482

TIME – 2ns/Div

Figure 13. Glitch Impulse at Major

Carry

0.2

0.0

–0.2

–0.4

–0.6

–0.8

–1.0

RL = 50Ω

VOUT = 0 TO –1V

TIME – 5ns/Div

Figure 14. Rise and Fall

Characteristics

–80

RL = 50Ω

–75

VOUT = 0 TO –1V

–70

–65

–60

–55

–50

4 5 6 7 8 9 10

20

FREQUENCY – MHz

30 40

Figure 15. THD vs. Clock Frequency

at FOUT = 1 MHz

–86

CLOCK = 30MHz

–82

–78

–74

CLOCK = 10MHz

–70

–66

–62

–58

–54

CLOCK = 20MHz

–50

1

10

FREQUENCY – MHz

Figure 18. SFDR (Within a Window)

vs. FOUT

0

CLOCK = 10MHz

FOUT = 1.002MHz

–20

AMPLITUDE = 0dBm

OUTPUT IOUTB

RL = 50Ω

–40

–60

–80

–100

0.1

1

2

3

4

5

FREQUENCY – MHz

Figure 16. Typical Spectral

Performance

–80

CLOCK = 1MHz

–75

CLOCK = 10MHz

–70

CLOCK = 20MHz

–65

CLOCK = 30MHz

–60

CLOCK = 40MHz

–55

–50

0.01

0.1

1

10

FREQUENCY – MHz

Figure 19. THD vs. FOUT

0

CLOCK = 10MHz

–20

FOUT = 1.002MHz

AMPLITUDE = 0dBm

–40

–60

–80

–100

10k

1.0M

FREQUENCY – Hz

2.0M

Figure 17. Typical SFDR

(With a Window)

0

–20

–40

CLOCK = 10 MHz

FOUT1 = 240 kHz

FOUT2 = 260 kHz

AMPLITUDE = –6.0 dB FS

PER TONE

OUTPUT IOUTB

RL = 50Ω

–60

–80

–100

150 190

230 270

310

350

FREQUENCY – Hz

Figure 20. Intermodulation

Distortion

REV. B

–9–

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