TDA9910HW/6 PHILIPS [NXP Semiconductors], TDA9910HW/6 Datasheet - Page 13

• Manufacturer Part Number: TDA9910HW/6
• Description: 12-bit, up to 80 Msample/s, Analog-to-Digital Converter (ADC) direct/ultra high IF sampling
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
9397 750 14418
Objective data sheet
10.2.1
10.2.2 ENOB (effective number of bits)
10.2.3
10.2 Dynamic parameters
where:
Figure 7
conforming to coherent sampling (f
samples, M and N being relatively prime), and digitized by the ADC under test.
Remark: In the following equations, P
effects of random noise, non-linearities, sampling time errors, and “quantization noise”.
SINAD (signal-to-noise and distortion)
The ratio of the output signal power to the noise plus distortion power for a given sample
rate and input frequency, excluding the DC component:
It is derived from SINAD and gives the theoretical resolution an ideal ADC would require
to obtain the same SINAD measured on the real ADC. A good approximation gives:
THD (total harmonic distortion)
The ratio of the power of the harmonics to the power of the fundamental. For k
harmonics the THD is:
i
SINAD dB
ENOB
Fig 7. Single tone spectrum of full-scale input sine wave with frequency f
=
0x 2
magnitude
=
n
shows the spectrum of a single tone full-scale input sine wave with frequency f
SINAD 1.76
----------------------------------
–
2
=
6.02
10log
–
10
Rev. 02 — 9 December 2004
12-bit, up to 80 Msample/s, Analog-to-Digital Converter (ADC)
--------------------------------------- -
P
noise
P
signal
+
distortion
t
a 1
/f
s
= M/N, with M number of cycles and N number of
noise
is the power of the terms which include the
a 2
measured output range (MHz)
a 3
SFDR
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
a k
TDA9910
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t
.
f
s
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