Linear Technology DC1858A Demo Manual

Description
Demonstration circuit 1858A is a low noise, low distortion
sine wave generator designed to be used in conjunction
with Linear Technology 16-bit and 18-bit ADC demo boards.
Functionally, this board uses a Wien bridge oscillator that
has been level shifted to match the input range of 0V to 5V
16-bit and 18-bit Linear Technology ADC demo boards. The
default oscillator output level is 0.5V to 4.5V. The output
frequency is 2kHz. The output level and frequency can
be adjusted by changing a few resistors and capacitors.
For additional frequencies and output levels see Tables 1
and 2. For a detailed description of this oscillator see
BoarD photo
DEMO MANUAL DC1858A
Testing ADC Demo Boards
AN132. The DC1858A has 5V and ±12V outputs that can
be used to provide power for the ADC demo board under
test and the DC1216A low jitter clock source if required.
The DC1858A combined with the DC1216A, an ADC demo
board and a high speed USB controller (DC718 or DC890)
form a complete ADC evaluation system when used with
LTC's PScope™ software.
Design files for this circuit board are available at
http://www.linear.com/demo
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and PScope
is a trademark of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
Figure 1. DC1858A Typical Connection Diagram
Low Noise, Low Distortion
Sine Wave Generator for
dc1858af
1