ADC1006S070 NXP Semiconductors, ADC1006S070 Datasheet - Page 27

• Manufacturer Part Number: ADC1006S070
• Description: (ADC1006S055 / ADC1006S070) Single 10 bits ADC
• Manufacturer: NXP Semiconductors

NXP Semiconductors
ADC1006S055_070_2
Product data sheet
13.1.3.1 Spectral analysis (dual-tone)
13.1.3.2 IMD2 (IMD3)
13.1.3 Intermodulation distortion
13.1.4 Noise Power Ratio (NPR)
From a dual-tone input sinusoid (f
the coherence criterion), the intermodulation distortion products IMD2 and IMD3
(respectively, 2nd and 3rd-order components) are defined, as follows.
The ratio of the RMS value of either tone to the RMS value of the worst second (third)
order intermodulation product.
The total IMD is given by:
where,
When using a notch-filtered broadband white-noise generator as the input to the ADC
under test, the NPR is defined as the ratio of the average out-of-notch to the in-notch
power spectral density magnitudes for the FFT spectrum of the ADC output sample set.
IMD dB
P
P
a
+
Fig 27. Spectral analysis (dual-tone)
intermod
signal
2
im
a
magnitude
2
im
f
t
2 f
=
is the power in the intermodulation component at frequency f
=
t1
a
=
2
–
a
f
10
2
im
f
t1
t2
log
f
+
+
t1
a
a
–
2
P
-----------------------
2
im
P
Rev. 02 — 12 August 2008
intermod
f
f
signal
t2
t2
2 f
–
and
t1
a
+
2
im
f
t2
f
t1
t1
and f
+
f
t2
t2
, these frequencies being chosen according to
IMD3
Single 10 bits ADC, up to 55 MHz or 70 MHz
+
a
2
im
f
ADC1006S055/070
t1
measured output range (MHz)
–
2 f
t2
+
a
2
im
f
t1
t
+
.
014aaa441
© NXP B.V. 2008. All rights reserved.
2 f
w w w . D a t a S h e e t 4 U . c o m
t2
f
s
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