參數(shù)資料
型號(hào): TDA9910HW/8/C1
廠商: NXP SEMICONDUCTORS
元件分類(lèi): ADC
英文描述: 1-CH 12-BIT RESISTANCE LADDER ADC, PARALLEL ACCESS, PQFP48
封裝: 7 X 7 MM, 1 MM HEIGHT, PLASTIC, SOT545-2, MS-026, HTQFP-48
文件頁(yè)數(shù): 7/21頁(yè)
文件大小: 128K
代理商: TDA9910HW/8/C1
TDA9910_4
NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 04 — 12 June 2007
15 of 21
NXP Semiconductors
TDA9910
12-bit, up to 80 Msample/s, Analog-to-Digital Converter (ADC)
10.2.6 IMD2 (IMD3)
From a dual tone input sinusoid (ft1 and ft2, these frequencies being chosen according to
the coherence criterion), the intermodulation distortion products IMD2 and IMD3
(respectively, 2nd and 3rd order components) are dened, 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 InterModulation Distortion (IMD) is given by:
where:
with
corresponding to the power in the intermodulation component at frequency ft.
Fig 8.
Spectral of dual tone input sine wave with frequency
f1 f2
2f2 f1
2f1 f2
f1 + f2
2f2 2f1
f2
f1
f1 + 2f2
3f2
2f1 + f2
3f1
magnitude
frequency
001aag628
IMD dB
[]
10log
10
P
intermod
P
signal
----------------------
=
P
intermod
a
im f
t1
f
t2
()
2
a
im f
t1
f
t2
+
()
2
a
im f
t1
2f
t2
()
2
a
im f
t1
2f
t2
+
()
2
++
+
=
… a
+
im 2 f
t1
f
t2
()
2
a
im 2 f
t1
f
t2
+
()
2
+
a
im f
t1
()
2
P
signal
a
f
t1
2
a
f
t2
2
+
=
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