500-003111-000
1-2
1.2 FUNCTIONAL
DESCRIPTION
The VMIVME-3111 ADC Board is a self-contained, 12-bit board. The
analog inputs can be configured either as 48 single-ended channels, or as 16
differential plus an additional 16 single-ended inputs. In addition to user-selectable
ranges, the VMIVME-3111 offers real-time programmable input gains of x1, x10,
x100, and x500. Autocalibration features permit program-controlled calibration of
zero offsets and input gain. A block diagram of the VMIVME-3111 is shown in
Figure 1.2-1.
All inputs are available with low pass filters for noise elimination.
Thirty-two of the input channels are available at the rear panel P2 connector; the
front panel P3 connector contains 16 input channels which are cable compatible with
the VMIC 3V/5V Series of signal conditioners. A resident smart controller permits
"pipelined" ADC operation, and automatically inserts all necessary settling delays.
These features reduce program control of the ADC to a simple handshake
sequence, and provide the highest possible throughput or sample rate, without
degrading accuracy.
Two wideband analog outputs can supply 10 mA of drive current over the
full output range of ±10 V, and can be operated off-line for self-test. Built-in-Test
(BIT) features permit off-line verification of all active components by routing the
analog outputs through the analog input multiplexers.
1.3
REFERENCE MATERIAL LIST
For a detailed explanation of the VMEbus and its characteristics, the
publication "The VMEbus Specification" is available from the following:
VITA
VFEA International Trade Association
10229 N. Scottsdale Road
Scottsdale, AZ 85253
(602) 951-8866
The following Application and Configuration Guides are available from
VMIC to assist in the selection, specification, and implementation of systems based
upon VMIC's products:
TITLE
DOCUMENT NO.
Digital Input Board Application Guide
825-000000-000
Change-of-State Application Guide
825-000000-002
Digital I/O (with Built-in-Test) Product Line Description
825-000000-003
Synchro/Resolver (Built-in-Test) System Configuration Guide
825-000000-004
Analog I/O Products (with Built-in-Test) Configuration Guide
825-000000-005
Connector and I/O Cable Application Guide
825-000000-006
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