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-200

-160

-120

-80

-40

0

0

200

400

600

800

1000

1200

1400

1600

2000

1800

f-Frequency-kHz

+VA =5V,+VAREG=3V,+VBD=3V,REFIN=4.096V,

f =500kHz,SNR=90dB,THD=100dB

i

TIMING DIAGRAMS

CONVST

DB(Internal)

ACQUISITION

BUSY

Sample(N+1)

Conversion(N)

Sample(N)

CONVERT

DB(N-1)

DB(N)

ADS8422

SLAS512B – JUNE 2006 – REVISED DECEMBER 2006

TYPICAL CHARACTERISTICS (continued)

FFT (500 kHz)

Figure 23.

Note: The DB shown here is internal to the device and output on the pins only if and when CS and RD are both low

Figure 24. Conversion Control Timing

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