Rainbow-electronics ADC12062 Manual de usuario descargar pdf (Pagina 4)

AC Electrical Characteristics The following specifications apply for DV

5V,

REF

(SENSE)

4.096V, V

REF

(SENSE)

AGND, and f

1 MHz, unless otherwise specified. Boldface limits apply

for T

from T

MIN

to T

MAX

; all other limits T

Symbol Parameter Conditions

Typ Limit Units

(Note 7) (Note 8) (Limits)

Maximum Sampling Rate

1 MHz (min)

(1/t

THROUGHPUT

)

CONV

Conversion Time 740 600 ns (min)

(S/H

Low to EOC High) 980 ns (max)

Aperture Delay

20 ns

(S/H

Low to Input Voltage Held)

S/H

S/H Pulse Width 5 ns (min)

550 ns (max)

EOC

S/H Low to EOC Low

60 ns (min)

125 ns (max)

ACC

Access Time C

100 pF

10 20 ns (max)

(RD

Low or OE High to Data Valid)

TRI-STATE Control

1k, C

10 pF 25 40 ns (max)

(RD

High or OE Low to Databus TRI-STATE)

INTH

Delay from RD Low to INT High C

100 pF 35 60 ns (max)

INTL

Delay from EOC High to INT Low C

100 pF

35 ns (min)

10 ns (max)

UPDATE

EOC High to New Data Valid 5 15 ns (max)

Multiplexer Address Setup Time

50 ns (min)

(MUX Address Valid to EOC Low)

Multiplexer Address Hold Time

50 ns (min)

(EOC Low to MUX Address Invalid)

CSS

CS Setup Time

20 ns (min)

(CS Low to RD Low, S/H Low, or OE High)

CSH

CS Hold Time

20 ns (min)

(CS

High after RD High, S/H High, or OE Low)

Wake-Up Time

1 ms

(PD

High to First S/H Low)

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is

functional. These ratings do not guarantee specific performance limits, however. For guaranteed specifications and test conditions, see the Electrical Characteris-

tics. The guaranteed specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under

the listed test conditions.

Note 2: All voltages are measured with respect to GND (GND

AGND

DGND), unless otherwise specified.

Note 3: When the input voltage (V

) at any pin exceeds the power supply rails (V

GND or V

) the absolute value of current at that pin should be

limited to 25 mA or less. The 50 mA package input current limits the number of pins that can safely exceed the power supplies with an input current of 25 mA to

two.

Note 4: The maximum power dissipation must be derated at elevated temperatures and is dictated by T

JMAX

, i

and the ambient temperature T

. The maximum

allowable power dissipation at any temperature is P

JMAX

)/i

or the number given in the Absolute Maximum Ratings, whichever is lower. i

for the V

(PLCC) package is 55

C/W. i

for the VF (PQFP) package is 62

C/W. In most cases the maximum derated power dissipation will be reached only during fault

conditions.

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Rainbow-electronics ADC12062 Manual de usuario Pagina 4

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