AD7934-6(RevA) Ver la hoja de datos (PDF) - Analog Devices

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AD7934-6
(Rev.:RevA)

4-Channel, 625 kSPS, 12-Bit Parallel ADC with a Sequencer

Analog Devices 

TYPICAL PERFORMANCE CHARACTERISTICS

TA = 25°C, unless otherwise noted.

–60

100mV p-p SINE WAVE ON VDD AND/OR VDRIVE

NO DECOUPLING

–70 DIFFERENTIAL/SINGLE-ENDED MODE

INT REF

–80

–90

–100

EXT REF

–110

–120

10

210

410

610

810

SUPPLY RIPPLE FREQUENCY (kHz)

1010

Figure 3. PSRR vs. Supply Ripple Frequency Without Supply Decoupling

–70

INTERNAL/EXTERNAL REFERENCE

VDD = 5V

–75

–80

–85

–90

–195

0

100 200 300 400 500 600 700 800

NOISE FREQUENCY (kHz)

Figure 4. Channel-to-Channel Isolation

80

VDD = 5V

70

VDD = 3V

60

50

40

30

FSAMPLE = 625kSPS

RANGE = 0 TO VREF

DIFFERENTIAL MODE

20

0 100 200 300 400 500 600 700 800 900 1000

FREQUENCY (kHz)

Figure 5. SINAD vs. Analog Input Frequency for Various Supply Voltages

AD7934-6

0

–10

–20

–30

–40

–50

–60

–70

–80

–90

–100

–110

4096 POINT FFT

VDD = 5V

FSAMPLE = 625kSPS

FIN = 49.62kHz

SINAD = 70.94dB

THD = –90.09dB

DIFFERENTIAL MODE

FREQUENCY (kHz)

Figure 6. FFT @ VDD = 5 V

1.0

0.8

0.6

0.4

0.2

0

–0.2

–0.4

–0.6

–0.8

–1.0

0

VDD = 5V

DIFFERENTIAL MODE

500 1000 1500 2000 2500 3000 3500 4000

CODE

Figure 7. Typical DNL @ VDD = 5 V

1.0

0.8

0.6

0.4

0.2

0

–0.2

–0.4

–0.6

–0.8

–1.0

0

VDD = 5V

DIFFERENTIAL MODE

500 1000 1500 2000 2500 3000 3500 4000

CODE

Figure 8. Typical INL @ VDD = 5 V

Rev. A | Page 11 of 28

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