A1216E
Analog and Digital I/O Card
FEATURES
- Eight
differential or 16 single-ended input channels, switch
selectable
- Twelve-bit
resolution
- 100,000
samples per second
- On-board
pacer clock and three 16-bit counter/timers
- Two
independent, 12-bit D/A converters
- D/A
converter outputs disabled at power-on
- Eight
digital I/O lines (4 in, 4 out) accessible at primary
I/O connector
- Twenty-four
digital I/O lines on an auxiliary connector, configured
in two 8-bit ports and two 4-bit ports
FUNCTIONAL
DESCRIPTION
The
Al216E is a 3/4-1ength, multifunction, high-speed analog/digital
I/O card for use in ISA-bus Computers and compatibles. With
this card installed, the computer can be used as a precision
data acquisition and control system or a signal analysis instrument.
All connections are made through standard 37-pin D type connectors
at the rear of the computer. An additional 24 lines of digital
I/O are accessible through a 40-pin IDC type auxiliary connector
that mounts on an adjacent mounting bracket.
ANALOG
INPUTS
The
card accepts up to eight differential or sixteen single-ended
analog inputs. The channel input configuration is switch selectable
on the card, providing a choice between sixteen single-ended
channels or eight differential channels. Analog inputs may
be configured in unipolar (0 - 10V) or bipolar ( ±5V
and ±10V) modes through the use of jumpers on the card.
These inputs are amplified by a low-bias-current, fast-settling,
monolithic instrumentation amplifier with high common-mode
rejection. The amplifier provides programmable gains of 1,
10, 100, and 1000 and settles to 0.01% in 2 µSec.
The
A1216E card uses a 12-bit successive approximation analog-to-digital
converter (A/D) with a sample and hold amplifier input. Under
ideal conditions, the A/D can sustain a rate of 100,000 conversions
per second. A/D conversions may be initiated in one of three
ways:
-
by software command,
-
by on-board programmable timer, or
-
by direct external trigger.
Data may be transferred to the computer by interrupt or program
control. Interrupt levels 2-7 as well as 10, 11, 12, 14, and
15 are available by jumper selection.
INPUT
SYSTEM EXPANSION
The
card can be used with up to sixteen AIM-16P analog input multiplexer
cards. Each AIM-16 provides capability to connect sixteen
differential inputs. Thus, when an A1216E is used with a full
complement of AIM-16's, there can be as many as 256 analog
inputs. Use of an AIM-16 with the A1216E requires a special
cable adaptor.
ANALOG
OUTPUTS
The
A1216E card has two 12-bit digital-to-analog converters (D/A)
connected to output drivers capable of providing 5 mA current
drive. Each channel provides output ranges of 10V, 5V, and
2.5V unipolar and ±l0V, ±5V, ±2.5V bipolar.
The ranges of the two D/A's are independent and are selected
by means of switches on the card. The D/A's make use of an
on-board reference voltage. Analog outputs are disabled at
power-up and remain disabled until the computer writes to
them. This prevents spurious outputs from causing damage when
the system is first activated.
DIGITAL
I/O
Four
bits of TTL/CMOS- compatible digital input capability are
provided. Digital inputs IP0 and IP2 have dual purposes. Input
IP0 may be used to provide external start pulses to the A/D.
Input IP2 may be used as a gate input to Counter/Timer 0.
These inputs can be converted to output ports for multiple
AIM-16 applications as described under Input System Expansion.
When this is done, you give up capability for external triggering
of the A/D and gating Counter/Timer 0.
Four
bits of digital output are available with LSTTL logic levels
and 10 LSTTL load drive capability. Discrete outputs OP0 through
OP3 provide multiplexer addressing capability for input expansion
use, as described previously, or can be used as separate digital
outputs. There are twenty-four bits of additional digital
I/O available on the auxiliary connector. These bits are arranged
in two 8-bit ports and two 4-bit ports. Each port may be independently
programmed for input or output.
COUNTER/TIMERS
Three
16-bit Counter/Timers are provided on the A1216E. Counter/Timer
0 is enabled by a digital input and uses either an internal
1 .0 MHz clock or an external clock of up to 10 MHz. This
counter is not committed on the card. Its clock, enable, and
output lines are all available at the I/O connector. Counter/Timers
1 and 2 are concatenated to form a 32-bit counter/timer for
timed A/D conversions and/or external frequency generation.
This dual counter/timer is enabled by program control and
is clocked by a 1 MHz on-board crystal oscillator source.
Counter/Timer 0 and Counter/Timers 1 and 2 can be set up for
event counting, frequency or period measurements, and pulse
or waveform generation.
PIN
CONNECTIONS
Connections
are made to the A1216E card via a 37-pin D type connector
that extends through the back of the computer case. The
only differences between the A1216E and the AD12-16/16F
are the absence of analog reference inputs and the -5V
reference output since analog output ranges are selected
by on-board jumpers.
SPECIFICATIONS
Analog
Inputs
- Channels:
16 single-ended or 8 differential, switch selectable.
- Resolution:
12 binary bits.
- Accuracy:
0.1%.
- Input
Voltage Modes: ±5V, ±10V, 0-10V
- Input
Amplifier Gains: 1, 10, 100, 1000 (Under software
control per channel).
- Coding:
True binary for unipolar inputs and offset binary
for bipolar inputs under jumper control.
- Conversion
Time: 8 usec max. (100 KHz throughput)
- A/D
Type: Successive Approximation.
- Monotonicity:
Guaranteed over operating temperature range.
- Linearity:
±0.9 LSB.
- Zero
Drift: ±2 PPM/°C.
- Gain
Drift: ±2 PPM/°C.
- Trigger
Source: Software Command, On-board Programmable
Timer, or External Source.
Analog
Outputs
- Channels:
Two, independent.
- Type:
12-bit, double-buffered.
- Relative
Accuracy: ±1 LSB.
- Output
Ranges: 0-2.5V, 0-5V, 0-10V, +2.5V, ±5V,
±10V.
- Settling
Time: 15 usec to ± 1 bit.
- Output
Drive: 5 mA.
- Output
Impedance: 0.5 ohms.
Digital
I/0
(8
Bits on Main 37-Pin D Connector)
Digital
I/O
(24
Bits on Auxiliary 40-Pin IDC Connector)
Programmable Timer
- Type:
82C54-2 programmable interval timer.
- Counters:
Three 16-bit down counters, two concatenated with
1 MHz clock as programmable timer. One counter may
be driven by an external input to 10 MHz or driven
by internal 1 MHz clock source.
- Output
Drive: 2.2 mA at 0.45V (5 LSTTL loads).
- Input
Gate: TTL/DTL/CMOS compatible.
- Clock
Input Frequency: DC to 10 MHz.
- Active
Count Edge: Negative edge.
- Minimum
Clock Pulse Width: 30 nS high/50 nS low.
- Timer
Range: 2.5 MHz to < 1 pulse per hour.
Environmental
- Operating
Temperature Range: 0° to 50°C.
- Storage
Temperature Range: -20° to +70°C.
- Humidity:
0 to 90% RH, non-condensing.
- Weight:
10 oz.
- Power
Required: +5 VDC, 800 mA.
Size
Regulatory
Compliance 
Declaration of Conformity, and Test Reports are on file.
Users must use appropriate shielded cables.
| Part
Number |
Price(USD)
|
| A1216E |
395.00
|
| A1216E-S01 |
370.00
|
View / Download Manual (in
.PDF format)
