tda8769hw/8 NXP Semiconductors, tda8769hw/8 Datasheet - Page 21

• Manufacturer Part Number: tda8769hw/8
• Description: 12-bit, 60/80/105 Msps Analog-to-digital Converter Adc Nyquist/high If Sampling
• Manufacturer: NXP Semiconductors

Philips Semiconductors
11.5
11.5.1
11.5.1.1
INL is defined as the deviation of the transfer function from
a best fit straight line (linear regression computation). The
INL of code i is obtained from the following equation:
where:
i = code value
V
S = slope of the ideal straight line (code width).
11.5.1.2
DNL is the deviation in code width from the value of one
LSB. The DNL of code i is obtained from the following
equation:
2003 Dec 09
INL i
DNL i
handbook, full pagewidth
in
12-bit, 60/80/105 Msps Analog-to-Digital Converter
(ADC) Nyquist/high IF sampling
= input voltage for code i
magnitude
Definitions
=
=
S
V
----------------------------------------------
TATIC PARAMETERS
Integral non-linearity (INL)
Differential non-linearity (DNL)
V
-------------------------------------------- -
in
100
120
140
160
in
20
40
60
80
0
i
0
i
–
+
V
S
1
S
in
–
ideal
V
2.5
in
i
Fig.15 Spectrum of a full-scale input sine wave with frequency f
5
7.5
10
12.5
21
where:
i = 0 to 2
V
S = slope of the ideal straight line.
11.5.2
Figure 15 shows the spectrum of a single tone full-scale
input sine wave with frequency f
sampling and digitized by the ADC under test. Coherent
sampling means that
cycles, N the number of samples and both M and N being
a relative prime.
Remark: The parameter P
equations includes the power of the random noise,
non-linearities, sampling time errors and quantization
noise.
in
= input voltage for code i
15
n
D
YNAMIC PARAMETERS
17.5
2
20
--- -
f
f
s
t
measured output range (MHz)
IMD3
=
noise
M
---- -
N
22.5
, where M is the number of
t
.
used in the following
t
, conforming to coherent
Objective specification
25
TDA8769
MBL882
27