®®

FEATURES

••••• Up to 10 MHz A/D sample rate

••••• Very low harmonic distortion

••••• Analog input comparator trigger

••••• Choice of 12, 14, or 16-bit A/D resolution

••••• Optional 2 to 8-channel simultaneous sampling

••••• On-board FIFO memory up to 16,384 samples

••••• Ideal for FFT’s, DSP, or array processor “front ends”

••••• Non-bus burst parallel port for seamless recording

Offering very high system speed, the PC-414 is a multi-channel

analog input board for ISA compatible computers. Input

bandwidth is available up to 5 MHz and may be sampled at up

to 10 MHz. A common motherboard is used, with the analog

section contained in a pluggable 2” by 4” module. This allows

for a family of several different Sample/Hold - A/D Converter

speed and resolution options by exchanging analog modules.

The analog input ranges of the A/D converter are selectable

as unipolar 0 to +10 V, or bipolar ±5 V, or ±10 V depending on

the model. Model PC-414E offers 16 single-ended or 8

differential high speed channels.

Models PC-414F, G, J, K, L, M, and P include a simultaneous

sampling section. This function acquires signals on parallel

channels at the same time. This prevents phase errors and

skewing of multichannel correlated signals. Applications

include high speed cross-channel computation, beam-former

coherency for sonar or acoustics, telemetry, multiple carrier

demodulation, and highly concurrent system testing.

Figure 1. Functional Block Diagram

A/D data passes to an on-board First-In, First-Out (FIFO) data

memory and then to the host computer bus interface under

software control. The FIFO acts to uncouple the precise

timing of the A/D section from the block-oriented data

transfers on the bus. The design can continuously collect

analog data with non-stop converter triggering while data is

simultaneously read from the FIFO. This allows the collection

of “seamless” wide-bandwidth signals of millions of samples or

greater. Functions such as FFT sampling cannot tolerate lost

samples without increases in “arithmetic” noise during

computation processing.

Data can be transferred to mass storage peripherals such as

disk or magnetic tape. Applications include long-baseline

studies in astrophysics, component life testing, and

anomalous pattern search.

Channel Address Sequencer

FIFO

Memory

Empty Half

Full

Trigger Control

Trigger In

D/A Out

External

Trigger

Trigger

Comparator

Analog Trigger

D/A Converter

82C54 Programmable

Interval Timer

Interrupt

Request

DMA

Request

I/O Bus

Interface

DC/DC

Power Converter

Base Address

Select

Registers

8MHz

ISA BUS

Half

Full

DMA

T/C

Parallel Outport or

DSP COMM Port

D/A Output

Ready Output

Acknowledge Input

External Enable Input

+5V

SSH Control

ACQ

EOC

Reset

FIFO Flags

A/D Start Clock

M

U

X

A/D

A/D

C

T

L

Analog

Inputs

Digital

I/O

8 out,

8 in

Pluggable Analog Section

PC-414

High-Speed Analog Input Board

for ISA Computers

Now with

NEW

DATEL, Inc., Mansfield, MA 02048 (USA)

• Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356 • Email: sales@datel.com • Internet: www.datel.com

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