max5893egk-d Maxim Integrated Products, Inc., max5893egk-d Datasheet - Page 21

• Manufacturer Part Number: max5893egk-d
• Description: Max5893 12-bit, 500msps Interpolating And Modulating Dual Dac With Cmos Inputs
• Manufacturer: Maxim Integrated Products, Inc.

images at odd numbers of f
the first filter, the images are at 2f
then passed to the second interpolating filter, which is
similar to the first filter and removes the images at 2f
10f
Figure 10. Spectral Representation of 4x Interpolation Filter with f
Frequency, f
S
INPUT
SPECTRUM
AND FIRST
FILTER
RESPONSE
OUTPUT
SPECTRUM
OF THE
FIRST
FILTER
INPUT
SPECTRUM
AND
SECOND
FILTER
RESPONSE
OUTPUT
SPECTRUM
OF THE
SECOND
FILTER
OUTPUT
SPECTRUM
OF THE
MODULATOR
, etc. Finally, the third filter removes images at 4f
12-Bit, 500Msps Interpolating and Modulating
S
)
FOR COMPLEX MODULATION THE MODULATION SIGN (BIT 1, ADDRESS 01h) SELECTS UPPER OR LOWER SIDEBAND
SIGNAL
SIGNAL
SIGNAL
SIGNAL
______________________________________________________________________________________
SIDEBAND
LOWER
S
are filtered. At the output of
S
SIGNAL
, 4f
f
f
f
f
f
S
S
S
S
S
IMAGE
S
, etc. This signal is
FILTER
RESPONSE
UPPER
SIDEBAND
Dual DAC with CMOS Inputs
S
, 6f
S
S
2f
2f
2f
2f
2f
,
,
S
S
S
S
S
IM
IMAGE
IMAGE
/ 4 Modulation (Output Frequencies are Relative to the Data Input
12f
the spectral responses when using the interpolating filters
combined with the digital modulator.
S
, 20f
S
, etc. Figures 10, 11, and 12 similarly illustrate
RESPONSE
FILTER
3f
3f
3f
3f
3f
S
S
S
S
S
IMAGE
IMAGE
4f
4f
4f
4f
4f
S
S
S
S
S
NO INTERPOLATION
2x INTERPOLATION
4x INTERPOLATION
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