WinSystems PCM-A/D-12, Руководство по эксплуатации

Страница: 4 / 76

1
GENERAL INFORMATION
1.1
Features
n
Low Power/Low Cost PC/104 A/D Con verter Mod ule
n
16 Sin gle ended or 8 Dif fer en tial in put chan nels
n
Avail able in 12- Bit or 16- Bit mod els
n
30uS Auto Con ver sion Time
n
In ter rupt avail able on end of con ver sion
n
In put ranges of 0-5V and +/-10V
n
Out put for mat in straight Bi nary or Signed two's com ple ment Bi nary
n
Ex tended in dus trial op er at ing tem pera ture range
n
Op tional DC/DC con verter for +5V only op era tion
1.2
General Description
The PCM-A/D-16 and PCM-A/D-12 are low cost, gen eral pur pose, suc ces sive ap proxi -
ma tion analog- to- digital con vert ers. The PCM-A/D-16 uses the Burr- Brown ADS7807 16-
bit con verter while the PCM-A/D-12 uses the Burr- Brown ADS7806 12- bit con verter. Ap -
pen dix C con tains the da tasheet re prints on these com po nents.
The PCM-A/D sup ports 16 chan nels in a uni po lar 5V range, or a bi po lar +/-10 volt
range. Al ter nately 8 chan nels of dif fer en tial in put is sup ported in a 5 volt or 10 volt range.
Re peti tive chan nel con ver sion time is 25uS and ran dom chan nel ac cess time is 30uS. The
end of con ver sion can be de ter mined via soft ware poll ing or by an in ter rupt to the CPU.
970513 PCM-A/D-12/16 OPERATIONS MANUAL Page 1-1