ADC082S021 datasheet(5/19 Pages) NSC

5 / 19 page

ADC122S101 Timing Specifications

The following specifications apply for V

A = +2.7V to 5.25V, GND = 0V, fSCLK = 8 MHz to 16 MHz, fSAMPLE = 500 kSPS to 1

MSPS, C

L =35pF, Boldface limits apply for TA =TMIN to TMAX: all other limits TA = 25˚C.

Symbol

Parameter

Conditions

Typical

Limits

(Note 7)

Units

CSU

Setup Time SCLK High to CS Falling Edge

(Note 10)

A = +3.0V

−3.5

ns (min)

A = +5.0V

−0.5

CLH

Hold time SCLK Low to CS Falling Edge

(Note 10)

A = +3.0V

+4.5

ns (min)

A = +5.0V

+1.5

Delay from CS Until DOUT active

A = +3.0V

ns (max)

A = +5.0V

ACC

Data Access Time after SCLK Falling Edge

A = +3.0V

+14.5

ns (max)

A = +5.0V

+13

Data Setup Time Prior to SCLK Rising Edge

ns (min)

Data Valid SCLK Hold Time

ns (min)

SCLK High Pulse Width

0.5 x

SCLK

0.3 x

SCLK

ns (min)

SCLK Low Pulse Width

0.5 x

SCLK

0.3 x

SCLK

ns (min)

DIS

CS Rising Edge to DOUT High-Impedance

Output Falling

A = +3.0V

1.8

ns (max)

A = +5.0V

1.3

Output Rising

A = +3.0V

1.0

A = +5.0V

1.0

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, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. 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 = 0V, unless otherwise specified.

Note 3: When the input voltage at any pin exceeds the power supply (that is, VIN < GND or VIN > VA), the current at that pin should be limited to 10 mA. The 20

mA maximum package input current rating limits the number of pins that can safely exceed the power supplies with an input current of 10 mA to two. The Absolute

Maximum Rating specification does not apply to the VA pin. The current into the VA pin is limited by the Analog Supply Voltage specification.

Note 4: The absolute maximum junction temperature (TJmax) for this device is 150˚C. The maximum allowable power dissipation is dictated by TJmax, the

junction-to-ambient thermal resistance (

θJA), and the ambient temperature (TA), and can be calculated using the formula PDMAX=(TJmax − TA)/θJA. The values

for maximum power dissipation listed above will be reached only when the device is operated in a severe fault condition (e.g. when input or output pins are driven

beyond the power supply voltages, or the power supply polarity is reversed). Obviously, such conditions should always be avoided.

Note 5: Human body model is 100 pF capacitor discharged through a 1.5 k

Ω resistor. Machine model is 220 pF discharged through zero ohms.

Note 6: Reflow temperature profiles are different for lead-free and non-lead-free packages.

Note 7: Tested limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).

Note 8: This is the frequency range over which the electrical performance is guaranteed. The device is functional over a wider range which is specified under

Operating Ratings.

Note 9: Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.

Note 10: Clock may be in any state (high or low) when CS is asserted, with the restrictions on setup and hold time given by tCSU and tCLH.

ADC082S021 Datasheet(PDF) 5 Page - National Semiconductor (TI)

ADC082S021 Datasheet(HTML) 5 Page - National Semiconductor (TI)

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