Note 10), Note 12), Note 13) – Rainbow Electronics ADC12L080 User Manual

Page 8: Note 14), Ac electrical characteristics

AC Electrical Characteristics

(Continued)

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Note 8: To guarantee accuracy, it is required that |V

–V

≤ 100 mV and separate bypass capacitors are used at each power supply pin.

Note 9: With the test condition for V

REF

= +1.0V (2 V

P-P

differential input), the 12-bit LSB is 488 µV.

Note 10: Typical figures are at T

= T

= 25˚C, and represent most likely parametric norms. Test limits are guaranteed to National’s AOQL (Average Outgoing Quality

Level).

Note 11: Timing specifications are tested at TTL logic levels, V

= 0.4V for a falling edge and V

= 2.4V for a rising edge.

Note 12: Optimum dynamic performance will be obtained by keeping the reference input in the 0.8V to 1.5V range. The LM4051CIM3-ADJ or the LM4051CIM3-1.2
band gap voltage reference is recommended for this application.

Note 13: I

is the current consumed by the switching of the output drivers and is primarily determined by load capacitance on the output pins, the supply voltage,

, and the rate at which the outputs are switching (which is signal dependent). I

x f

+ C

x f

+....C

x f

) where V

is the output driver power supply

voltage, C

is total capacitance on the output pin, and f

is the average frequency at which that pin is toggling.

Note 14: Power consumption excludes output driver power. See (Note 13).

ADC12L080