ADS5270

SBAS293D − JANUARY 2004 − REVISED MAY 2004

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5

SWITCHING CHARACTERISTICS

TMIN = −40°C, TMAX = +85°C. Typical values are at TA = 25°C, clock frequency = maximum specified, 50% clock duty cycle, AVDD = 3.3V,

LVDD = 3.3V, −1dBFS, internal voltage reference, and LVDS buffer current at 3.5mA per channel, unless otherwise noted.

ADS5270

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

SWITCHING SPECIFICATIONS

25

50

ns

2.5

ns

Aperture Jitter (uncertainty)

1

ps

6.5

cycles

Propagation Delay

5

ns

SERIAL INTERFACE TIMING

Data is shifted in MSB first.

PARAMETER

DESCRIPTION

MIN

TYP

MAX

UNIT

t1

Serial CLK Period

50

ns

t2

Serial CLK High Time

25

ns

t3

Serial CLK Low Time

25

ns

t4

Minimum Data Setup Time

5

ns

t5

Minimum Data Hold Time

5

ns

Start Sequence

t

1

MSB

D6D5

D4

D3D2

D1

D0

t

2

t

3

t

4

t

5

ADCLK

CS

SCLK

SDATA

Outputs change on

next rising clock edge

after CS goes high.

Data latched on

each rising edge of SCLK.