SA8028 datasheet(23/28 Pages) PHILIPS

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Philips Semiconductors

Product data

SA8028

2.5 GHz sigma delta fractional-N /

760 MHz IF integer frequency synthesizers

2002 Feb 22

–48

–45

–42

–39

–36

–33

–30

–27

–24

–21

–18

–15

–12

2.7V

3.0V

3.6V

SR02404

–9

–6

–3

INPUT FREQUENCY (MHz)

Figure 27.

RF (main) divider input sensitivity vs. frequency

and supply voltage (Temp = 25

°C, Iset = 164 µA, N = 509)

–48

–45

–42

–39

–36

–33

–30

–27

–24

–21

–18

–15

–12

–40C

25C

85C

–9

–6

–3

SR02405

INPUT FREQUENCY (MHz)

Figure 28.

RF (main) divider input sensitivity vs. frequency

and temperature (VCC = 3.0 V, Iset = 164 µA, N = 509)

–48

–45

–42

–39

–36

–33

–30

–27

–24

–21

–18

–15

–12

2.7V

3.0V

3.6V

–9

–6

–3

SR02406

INPUT FREQUENCY (MHz)

Figure 29.

RF (main) fractional divider input sensitivity vs.

frequency and supply voltage (Temp = 25

°C, Iset = 164 µA,

N = 509.5)

–48

–45

–42

–39

–36

–33

–30

–27

–24

–21

–18

–15

–12

–40C

25C

85C

SR02407

–9

–6

–3

INPUT FREQUENCY (MHz)

Figure 30.

RF (main) fractional divider input sensitivity

vs. frequency and temperature (VCC = 3.0 V, Iset = 164 µA,

N = 509.5)

–45

–42

–39

–36

–33

–30

–27

–24

–21

–18

–15

–12

2.7V

3.0V

3.6V

SR02408

–9

–6

–3

INPUT FREQUENCY (MHz)

Figure 31.

IF (aux) divider input sensitivity vs. frequency and

supply voltage (Temp = 25

°C, Iset = 164 µA,

divider ratio = 16383)

–45

–42

–39

–36

–33

–30

–27

–24

–21

–18

–15

–12

–40C

25C

85C

SR02409

–9

–6

–3

INPUT FREQUENCY (MHz)

Figure 32.

IF (aux) divider input sensitivity vs. frequency and

temperature (VCC = 3.0 V, Iset = 164 µA, divider ratio = 16383)

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