TDA8769HW/6 データシートの表示（PDF） - Philips Electronics

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TDA8769HW/6

12-bit, 60/80/105 Msps Analog-to-Digital Converter (ADC) Nyquist/high IF sampling

Philips Electronics 

Philips Semiconductors

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

(ADC) Nyquist/high IF sampling

Objective specification

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:

INL(i) = V-----i-n---(---i-)----–----V-S----i-n---(--i--d---e---a----l--)

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:

DNL(i) = V-----i-n---(---i--+-----1--S--)----–----V----i--n---(--i--)

where:

i = 0 to 2n − 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 f-f-s-t = M-N--- , 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.

handbook, full pagew0idth

MBL882

−20

magnitude

−40

IMD3

−60

−80

−100

−120

−140

−160

0

2.5

5

7.5

10

12.5

15

17.5

20

22.5

25

27

measured output range (MHz)

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

2003 Dec 09

21

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