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ADC0820CCWM Datasheet(PDF) 12 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # ADC0820CCWM
Description  8-Bit High Speed 關P Compatible A/D Converter with Track/Hold Function
PDF  22 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

ADC0820CCWM Datasheet(HTML) 12 Page - National Semiconductor (TI)

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1.0 Functional Description (Continued)
OTHER INTERFACE CONSIDERATIONS
In order to maintain conversion accuracy, WR has a maxi-
mum width spec of 50 µs. When the MS flash ADC’s
sampled-data comparators (Section 1.2) are in comparison
mode (WR is low), the input capacitors (C,
Figure 8 ) must
hold their charge. Switch leakage and inverter bias current
can cause errors if the comparator is left in this phase for too
long.
Since the MS flash ADC enters its zeroing phase at the end
of a conversion (Section 1.3), a new conversion cannot be
started until this phase is complete. The minimum spec for
this time (t
P, Figures 2, 3, 4, 5 ) is 500 ns.
DS005501-20
Note: MS means most significant
LS means least significant
FIGURE 11. Operating Sequence (WR-RD Mode)
www.national.com
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