A-3
A/D Converter
Type
Successive
approximation
with internal
sample/hold
Successive
approximation
with internal
sample/hold
Successive
approximation
with internal
sample/hold
Coding
Offset binary
Bipolar ranges:
offset binary
Unipolar ranges:
true binary
Bipolar ranges:
offset binary
Unipolar ranges:
true binary
Resolution
12 bits
12 bits
12 bits
Linearity
±1 bit
(monotonic over
temperature)
±1 bit
(monotonic over
temperature)
±1 bit
(monotonic over
temperature)
Conversion time
25
µ
s, maximum
25
µ
s, maximum
25
µ
s, maximum
Conversion initiation
mechanisms
Software,
internal time
base, external
clock (falling
edge); software
selectable
Software,
internal time
base, external
clock (falling
edge); software
selectable
Software,
internal time
base, external
clock (falling
edge); software
selectable
Maximum conversion
frequency
40 kHz
40 kHz
40 kHz
Gating mechanism
External digital
trigger or gate;
software
selectable
External digital
trigger or gate;
software
selectable
External digital
trigger or gate;
software
selectable
Data transfer method
I/O read
(software)
I/O read
(software)
I/O read
(software)
Interrupts
Source
External
(rising-edge
input) or end of
A/D conversion;
software
selectable
External
(rising-edge
input) or end of
A/D conversion;
software
selectable
External
(rising-edge
input) or end of
A/D conversion;
software
selectable
Table A-1. DAS-800, DAS-801, and DAS-802 Specifications (cont.)
Feature
Attribute
DAS-800
Specifications
DAS-801
Specifications
DAS-802
Specifications