AD8345ARE datasheet(8/20 Pages) AD

Teilenummer	AD8345ARE

Bauteilbeschribung	140 MHz to 1000 MHz Quadrature Modulator

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Hersteller	AD [Analog Devices]

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AD8345

Rev. B | Page 8 of 20

–45

80

–55

–65

–70

–75

–80

60

40

20

0

–20

–40

–50

–60

TEMPERATURE (

°C)

VS = 5V, DIFFERENTIAL INPUT = 1.2V p-p

VS = 2.7V, DIFFERENTIAL INPUT = 200mV p-p

Figure 15. Third Order Distortion vs. Temperature

(FLO = 800 MHz, LO Level = −2 dBm, FBB = 1 MHz,

I and Q Inputs Driven in Quadrature)

BASEBAND DIFFERENTIAL INPUT VOLTAGE (V p-p)

–10

SSB POUT

3.0

2.5

2.0

1.5

1.0

0.5

0.0

THIRD ORDER DISTORTION

–15

–20

–25

–30

–35

–40

–45

–50

–55

–70

–60

–6

–2

–4

–8

–10

–12

–14

–16

–18

–20

–26

–65

–22

–24

Figure 16. Third Order Distortion and SSB POUT vs. Baseband Differential Input

Voltage (TA = 25°C, FLO = 800 MHz, LO Level = −2 dBm, FBB = 1 MHz, VS = 2.7 V)

–5

3.0

2.5

2.0

1.5

1.0

0.5

0.0

–10

–15

–25

–30

–35

–40

–45

–50

–55

–65

–60

–6

–2

–4

–8

–10

–12

–14

–16

–18

–20

–22

–20

–70

0

2

4

BASEBAND DIFFERENTIAL INPUT VOLTAGE (V p-p)

SSB POUT

THIRD ORDER DISTORTION

Figure 17. Third Order Distortion and SSB POUT vs. Baseband Differential Input

Voltage (TA = 25°C, FLO = 800 MHz, LO Level = −2 dBm, FBB = 1 MHz, VS = 5 V)

–40

0

40

–20

20

406080

45

50

55

60

65

70

75

80

TEMPERATURE (

°C)

VS = 5V, DIFFERENTIAL INPUT = 1.2V p-p

VS = 2.7V, DIFFERENTIAL INPUT = 200mV p-p

Figure 18. Power Supply Current vs. Temperature

WITH 50

Ω

WITH 100

Ω

LOIN NO BALUN

OR TERMINATION

SMITH CHART

NORMALIZED

TO 50

Ω

1GHz

250MHz

Figure 19. Smith Chart of LOIN Port S11 (LOIP Pin AC-Coupled to Ground);

Curves with Balun and External Termination Resistors Also Shown

(VS = 5 V, TA = 25°C)

FREQUENCY (MHz)

0

250

–10

–30

–5

–15

–20

–25

300 350 400 450 500 550 600 650 700 750 800 850 900 950 1000

VS = 2.7V

VS = 5V

Figure 20. Return Loss (S22) of VOUT Output (TA = 25°C)

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