EVAL-AD7490CB Analog Devices Inc, EVAL-AD7490CB Datasheet - Page 11

BOARD EVAL FOR AD7490

EVAL-AD7490CB

Manufacturer Part Number
EVAL-AD7490CB
Description
BOARD EVAL FOR AD7490
Manufacturer
Analog Devices Inc
Datasheet

Specifications of EVAL-AD7490CB

Number Of Adc's
1
Number Of Bits
12
Sampling Rate (per Second)
1M
Data Interface
Serial
Inputs Per Adc
16 Single Ended
Input Range
0 ~ 5 V
Power (typ) @ Conditions
12.5mW @ 1MSPS, 5 V
Voltage Supply Source
Single
Operating Temperature
-40°C ~ 85°C
Utilized Ic / Part
AD7490
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Peak Harmonic or Spurious Noise
Peak harmonic or spurious noise is defined as the ratio of the
rms value of the next largest component in the ADC output
spectrum (up to f
fundamental. Normally, the value of this specification is
determined by the largest harmonic in the spectrum, but for
ADCs where the harmonics are buried in the noise floor, it is a
noise peak.
Intermodulation Distortion
With inputs consisting of sine waves at two frequencies, fa
and fb, any active device with nonlinearities creates distortion
products at the sum and difference frequencies of mfa ± nfb,
where m, n = 0, 1, 2, 3, and so on. Intermodulation distortion
terms are those for which neither m nor n are equal to zero.
S
/2 and excluding dc) to the rms value of the
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For example, the second order terms include (fa + fb) and
(fa − fb), while the third order terms include (2fa + fb), (2fa − fb),
(fa + 2fb) and (fa − 2fb).
The AD7490 is tested using the CCIF standard where two input
frequencies near the top end of the input bandwidth are used.
In this case, the second order terms are usually distanced in
frequency from the original sine waves, and the third order
terms are usually at a frequency close to the input frequencies.
As a result, the second and third order terms are specified
separately. The calculation of the intermodulation distortion is
per the THD specification, where it is the ratio of the rms sum
of the individual distortion products to the rms amplitude of
the sum of the fundamentals expressed in decibels.
AD7490

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