Digilent 410-064P User Manual

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Revision: December 6, 2011

Overview

The Analog to Digital Module Converter Board
(the AD1™) converts signals at a maximum
sampling rate of one million samples per
second, fast enough for the most demanding
audio applications.

The AD1 uses a 6-pin header connector, and
at less than one square inch is small enough to
be located at the signal source.

Features include:

• two AD7476A 12-bit A/D converter
chips

• a 6-pin header connector

• a 6-pin connector

• two 2-pole Sallen-Key anti-alias filters

• two simultaneous A/D conversion

channels at up to one MSa per channel

• very low power consumption

• small form factor (0.95” x 0.80”).

Functional Description

The AD1 converts an analog input signal
ranging from 0-3.3 volts to a 12-bit digital value
in the range 0 to 4095.

The AD1 has two simultaneous A/D conversion
channels, each with a 12-bit converter and
filter. Each channel can sample a separate
stream of analog signals. The AD1 can also
convert a single stream of analog signals using
only one channel.

Each channel has two 2-pole Sallen-Key anti­alias filters with poles set to 500 KHz. The
filters limit the analog signal bandwidth to a

P1: CS

P2: Data1

P3: Data 2

P4: Clk

J1 Connector

P5: GND

P6: Vcc

frequency range suitable to the sample rate of
the converter.

The AD1 uses the SPI/MICROWIRE™ serial
bus standard to send converted data to the
host system. The serial bus can run at up to 20
MHz.

The AD1 has a 6-pin header and a 6-pin
connector for easy connection to a Digilent
system board or other Digilent products.

www. d i g i l e n t i n c . c om

215 E Main Suite D | Pullman, WA 99163

[phone] Voice and Fax

ADC

1

ADC

2

AD1 Circuit Diagram

Filter

Filter

P1

P2

P3

P4

P5

P6

J2 Connector

Doc: 502-064 page 1 of 2

Copyright Digilent, Inc. All rights reserved. Other product and company names mentioned may be trademarks of their respective owners.

Digilent AD1 Reference Manual Digilent, Inc.

The AD1 can be powered by voltage from
either a Digilent system board or an outside
device. Damage can result if power is supplied
from both sources or if the outside device
supplies more than 3V.

For more information, see

www.digilentinc.com.

For more information about the AD7476A 12­bit converter chip, refer to the corresponding
ADI data sheet at www.analog.com/AD7476A.

www.digilentinc.com page 2 of 2

Copyright Digilent, Inc. All rights reserved. Other product and company names mentioned may be trademarks of their respective owners.