|
|
|
PC104 Analog Input Module - PCM-A/D12 & PCM-A/D16
This product is not recommended for new designs.
|
 |
|
- 12-bit A/D subsystem:
PCM-A/D12
16-bit A/D subsystem: PCM-A/D16
- 16 single ended or 8 differential input channels
- Sample and hold supported
- Input ranges: 0-5V, ±10V
- All input channels protected to ±30V
- 33 KHz throughput
- Operates in Polled Mode or Interrupt at end-of-conversion
- Programmable board I/O address
- Low power and low cost
- PC/104 compatible
- Small size: 3.6" x 3.8" (90 mm x 96 mm)
- Extended operating temperature range:
-40°C to +85°C
- Optional DC/DC converter for operation with single
+5 volt supply
- Optional Analog Adapter panel for field wiring
termination, 4-20 mA, and signal conditioning
|
|
OVERVIEW
The
PCM-A/D12 and PCM-A/D16 are low cost, general
purpose, successive approximation analog-to-digital converters.
They serve as data acquisition modules for use
with PC/104 compatible embedded systems. The analog
inputs are configurable as either single-ended or differential
inputs.
The PCM-A/D12 is a 12-bit A/D converter and the PCM-A/
D16 is a 16-bit A/D converter. When both boards
have the same features, they will be referred to as the
PCM-A/D in this datasheet.
FUNCTIONALITY
P C/104 Interface - The PCM-A/D is I/O port mapped
and requires 4 contiguous addresses on any even four
port boundary.
Analog-to-Digital Converter - The PCM-A/D12 uses the
7806 which is software compatible with the 7807 and
has the same conversion rate.The PCM-A/D16 uses the
low power, Burr-Brown 7807, 16-bit, analog-to-digital
converter. The device samples and digitizes to 16-bits
within 25uS.
Two input ranges are supported: 0 to +5 volts and ±10
volts. The board is selected by a jumper option to be
configured for either unipolar or bipolar operation.
Coding is two's complement for bipolar and straight
binary for unipolar operation. Potentiometers are on the
card to permit both gain and offset adjustment.
Starting a Conversion - The conversion is begun by
writing a word to the control register to select the
channel. Output data is latched in the chip and the
PCM-A/D sets a Busy flag signaling that the conversion
is complete.
Interrupts - An analog-to-digital conversion is begun
each time the channel number is written to the board.
An end-of-conversion generates an interrupt that is field
jumper selectable to one of eleven interrupt request
lines (IRQ 2 - 7, 10 - 12, 14, and 15) on the PC/104 Bus.
Multiplexer - The PCM-A/D module contains two, 8
channel fault-protected 508ACMOS Analog Multiplexers
with overvoltage protection. They can withstand continuous
analog input voltages of ±30V which eliminates
the possibility of damage when the power supplies are
turned off. Equally important, they can withstand brief
input transient spikes which would otherwise require
complex external protection networks.
Input Configuration - Each A/D
channel is input from a single 26-pin connector. WinSystems
offers the CBL-120-3 which is a 3 foot, #28 AWG, ribbon cable
designed to provide access to signals from the 26-pin,
0.100 " grid connector on the PCM-A/D.
In differential mode, IN+ and IN- are selected from
pairs of CH0/CH8, CH1/CH9, CH2/CH10, CH3/CH11,
CH4/CH12, CH5/CH13, CH6/CH14, and CH7/CH15.
Also available is the CBL-130-4 is a 4 foot, ribbon cable
that will connect the PCM-A/D to the Analog-ADP. The Analog-ADP
is a non-isolated signal conditioner and
termination panel of analog signals for use with
WinSystems' A/D converters.
Field Wiring - The Analog-ADP termination board is
available for terminating field wiring. This signal conditioning
panel is for use with WinSystems' PCM-A/D
modules. It provides a multitude of termination options
including signal protection for the analog input signals
plus it serves as a field wiring to ribbon cable adapter.
The PCM-A/D and Analog-ADP are connected by the
CBL-130-4, 26-pin ribbon cable connector.
Either 0 to +5V or 0 to ±10V inputs are accepted on
the
16 channels. For 4-20 mA sensors, close tolerance 250
ohm termination resistors can be installed on the
Analog-ADP termination panel. A directly proportional
+1 to +5 volt signal will be generated across the shunting
resistor.
SPECIFICATIONS
Electrical A/D Section
Number of Channels: 16 S.E. or 8 D.I.
A/D Resolution: 16-bits (PCM-A/D16)
12-bits (PCM-A/D12)
Input range: 0 to +5 volts; -10 to +10 volts;
single ended or differential
Coding: Natural binary (unipolar)
Two's complement (bipolar)
Nonlinearity: ±1.5 LSB (PCM-A/D16)
±
0.5 LSB (PCM-A/D12)
Gain error: Adjustable to zero
Total conversion time: 30 microseconds
Electrical Power Requirements:
With DC/DC converter installed
+5 VDC +5% at 200mA (typ.)
Without DC/DC converter installed
+5 VDC +5% at 150mA (typ.)
+12VDC +5% at 5mA (typ.)
-12VDC +5% at 5mA (typ.)
Mechanical
Dimensions: 3.6" x 3.8" (90 mm x 96 mm)
Connectors
Input: 26-pin dual on 0.100" grid
Environmental
Operational Temperature: -40°C to +85°C |
| |
| ORDERING INFORMATION |
|
| Part Number |
Description |
| PCM-A/D12-16 |
12-bit A/D PC/104 module |
| PCM-A/D12-16-DC |
12-bit A/D PC/104 module with
DC/DC |
| PCM-A/D16-16 |
16-bit A/D PC/104 module |
| PCM-A/D16-16-DC |
16-bit A/D PC/104 module with
DC/DC |
|
| Part Number |
Description |
| CBL-120-3 |
3ft, 26 conductor ribbon cable
with one unterminated end |
| CBL-130-4 |
3ft, 26 conductor ribbon cable
to the Analog-ADP card |
|
| Part Number |
Description |
| Analog-ADP |
16-channel field termination panel |
|
| |
Downloads
| Printable datasheet in PDF format |
Datasheet |
| Electronic product manual in PDF format (requires
login) |
Manual |
|
| Example/calibration program for PCM-A/D12 and PCM-A/D16 |
pcmad12.zip |
|
|
|
 |
|
