TDA8769 datasheet(21/28 Pages) PHILIPS

21 / 28 page

2003 Dec 09

Philips Semiconductors

Objective speciﬁcation

12-bit, 60/80/105 Msps Analog-to-Digital Converter

(ADC) Nyquist/high IF sampling

TDA8769

11.5

Deﬁnitions

11.5.1

STATIC PARAMETERS

11.5.1.1

Integral non-linearity (INL)

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

Vin = input voltage for code i

S = slope of the ideal straight line (code width).

11.5.1.2

Differential non-linearity (DNL)

DNL is the deviation in code width from the value of one

LSB. The DNL of code i is obtained from the following

equation:

where:

i=0to2n

− 2

Vin = input voltage for code i

S = slope of the ideal straight line.

11.5.2

DYNAMIC PARAMETERS

Figure 15 shows the spectrum of a single tone full-scale

input sine wave with frequency ft, conforming to coherent

sampling and digitized by the ADC under test. Coherent

sampling means that

, where M is the number of

cycles, N the number of samples and both M and N being

a relative prime.

Remark: The parameter Pnoise used in the following

equations includes the power of the random noise,

non-linearities, sampling time errors and quantization

noise.

INL i

()

in i

() V

in ideal

()

–

----------------------------------------------

DNL i

()

in i1

() V

in i

()

–

---------------------------------------------

----

-----

handbook, full pagewidth

MBL882

measured output range (MHz)

2.5

magnitude

−20

−40

−60

−80

−100

−120

−160

7.5

12.5

17.5

22.5

−140

IMD3

Fig.15 Spectrum of a full-scale input sine wave with frequency ft.

TDA8769 Datasheet(PDF) 21 Page - NXP Semiconductors

TDA8769 Datasheet(HTML) 21 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

Datasheet Download

Link URL