Note 10), Note 11), Note 13) – Rainbow Electronics ADC12D040 User Manual
Page 9: Note 14), Note 15), Ac electrical characteristics
AC Electrical Characteristics
(Continued)
input voltage must be
≤4.85V to ensure accurate conversions.
20046007
Note 8: To guarantee accuracy, it is required that |V
A
–V
D
|
≤ 100 mV and separate bypass capacitors are used at each power supply pin.
Note 9: With the test condition for V
REF
= +2.0V (4V
P-P
differential input), the 12-bit LSB is 977 µV.
Note 10: Typical figures are at T
A
= T
J
= 25˚C, and represent most likely parametric norms. Test limits are guaranteed to National’s AOQL (Average Outgoing Quality
Level).
Note 11: Integral Non Linearity is defined as the deviation of the analog value, expressed in LSBs, from the straight line that passes through positive and negative
full-scale.
Note 12: Timing specifications are tested at TTL logic levels, V
IL
= 0.4V for a falling edge and V
IH
= 2.4V for a rising edge.
Note 13: Optimum performance will be obtained by keeping the reference input in the 1.8V to 2.4V range. The LM4051CIM3-ADJ (SOT23 package) is
recommended for this application.
Note 14: I
DR
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,
V
DR
, and the rate at which the outputs are switching (which is signal dependent). I
DR
=V
DR
(C
0
x f
0
+ C
1
x f
1
+....C
11
x f
11
) where V
DR
is the output driver power supply
voltage, C
n
is total capacitance on the output pin, and f
n
is the average frequency at which that pin is toggling.
Note 15: Excludes I
DR
. See note 14.
ADC12D040
www.national.com
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