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Suggestions for ideal 8 bit parallel ADC?



Jan 1, 1970
Please can someone advise on a choice of 8 bit parallel ADC?
So far I favour either of the first two here but there might be better.

TLC0820A Texas Instruments
ADC0820C National Semiconductor
AD7820K Analog Devices
ZN448 GEC Plessey (Zarlink?)

I use a DC bypassed multichannel sound card as a source of software
controlled analog signals. It is convenient to have a few TTL outputs for
aux control driven by a spare channel, encoding 8 bits onto a wave of any
bit depth, so that all I need to do is send the analog output full scale
into an 8 bit parallel ADC to get 8 switches. Is one of these IC's ideal
for this, or could I do better with something else? DIL type preferred, or
similar in SMT considered. Whatever it is, it needs to run on 5V, be cheap
and really easy to use.