Texas Instruments ADS8364EVM, User Manual, Page: 9 / 28

1-1 EVM Overview
EVM Overview
The ADS8364 is a high-speed, low power, dual 16-bit A/D converter that
operates from independent 5-V AV
DD
and DV
DD
supplies. The digital output
is delivered through a built-in buffer circuit that can be powered from DV
DD
or
separate 2.7-V to 5.25-V (BV
DD
) sources. This allows for flexibility when
designing within mixed voltage environments.
The six fully differential sample and hold circuits are divided into three pairs (A,
B, and C). Each pair of channels has a hold signal (HOLDA, HOLDB, and
HOLDC) which, when strobed together, allows simultaneous sampling on all
six analog inputs. The part accepts an analog input voltage in the range of
–V
REF
to +V
REF
, centered on the internal 2.5-V reference. The part also accepts
bipolar input ranges when a level shift circuit is used in the analog front-end
circuitry (see Figure 2 - 1).
Conversion time for the ADS8364 is 3.2
µ
s when a 5-MHz external clock is
used. The corresponding acquisition time is 0.8
µ
s. To achieve the maximum
output rate (250 KSPS), the read function can be performed during the start
of the next conversion.
The ADS8364 EVM includes the following features:
Full-featured evaluation board for the ADS8364 250-kHz, 16-bit,
6-channel simultaneous sampling analog-to-digital converter
Analog inputs can be configured as single-ended or differential
Direct connection to C5000 and C6000 DSK platforms through the 80-pin
interface connectors
Built-in reference
High-speed parallel interface
Chapter 1