PMODR2R Datasheet, PDF (1/1 Pages) List of Unclassifed Manufacturers – The PmodR2R board provides digital-to-analog conversion using a circuit that has been a staple in engineering design for decades.

PmodR2R™
Reference Manual
Revision: February 6, 2009
Note: This document applies to REV B of the board.
Overview
The PmodR2R board provides digital-to-analog
conversion using a circuit that has been a
staple in engineering design for decades. The
board provides an easy way to gain insight and
experience with R2R circuits.
Features include:
• 8-bit digital to analog conversion at up
to 25MHz
• easy attachment of oscilloscopes to
illustrate the data conversion process
• rugged construction
Functional Description
The PmodR2R board provides an R2R
resistor divider network that can convert an
8-bit digital input signal to an analog value.
The board uses 20K and 10K resistors, so
very little current is drawn from input source
pins. Separate GND and analog signal-out
connections are provided. The output
analog signal is also connected to a 2-pin
header at J1. J3 provides a 2-pin test point
for easy measurement of analog signals.
®
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J2 Pin Signal _20K
P10 D7
20K
P9 D6
20K
P8 D5
20K
P7 D4
20K
P4 D3
20K
P3 D2
20K
P2 D1
20K
P1 D0
GND
Output
10K
10K
10K
10K
10K
10K
10K
20K
Signals and Connector Pinouts
Doc: 502-165
page 1 of 1
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