ADC12040

SNAS135G – FEBRUARY 2001 – REVISED MARCH 2013

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AC Electrical Characteristics

(1) (2) (3) (4)

Typical

Limits

Units

Symbol

Parameter

Conditions

(5)

(5)

(Limits)

Maximum Clock Frequency

50

40

MHz (min)

Minimum Clock Frequency

100

kHz

Clock High Time

11.25

ns (min)

Clock Low Time

11.25

ns (min)

Conversion Latency

6

Clock Cycles

16.3

ns (max)

12

15.9

ns (max)

Data Output Delay after Rising CLK Edge

15.7

ns (max)

11

14.9

ns (max)

Aperture Delay

1.2

ns

Aperture Jitter

1.2

ps rms

Data outputs into TRI-STATE Mode

4

ns

Data Outputs Active after TRI-STATE

4

ns

Power Down Mode Exit Cycle

20

(1)

(2)

(3)

(4)

(5)

Outgoing Quality Level).

Figure 1.

Specification Definitions

APERTURE DELAY is the time after the rising edge of the clock to when the input signal is acquired or held for

conversion.

APERTURE JITTER (APERTURE UNCERTAINTY) is the variation in aperture delay from sample to sample.

Aperture jitter manifests itself as noise in the output.

CLOCK DUTY CYCLE is the ratio of the time during one cycle that a repetitive digital waveform is high to the

total time of one period. The specification here refers to the ADC clock input signal.

8

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