LTC6948 datasheet(11/26 Pages) AD

11 / 26 page

LTC5556

Rev 0

For more information www.analog.com

TYPICAL PERFORMANCE CHARACTERISTICS Test circuit shown in Figure 1.

PRF = –6dBm/Tone, ∆f = 2MHz, PLO = 0dBm, VCC = 3.3V, VDD = 3.3V, TC = 25°C, full power mode, unless otherwise noted.

1.5GHz to 2.1GHz RF Input Matching: RF = 1.8GHz, IF = 270MHz, Low Side LO

Conv Gain and IIP3 vs RF Frequency

and IF Attenuation (3dB Steps)

SSB NF vs RF Frequency

and IF Attenuation (3dB Steps)

Conv Gain vs IF Frequency and

Attenuation, Swept RF/Fixed LO

1.8GHz Conv Gain, IIP3 and SSB NF

vs LO Power and Case Temperature

1.8GHz Conv Gain, IIP3 and SSB

NF vs IF Attenuation

1.8GHz RF Input and IF Output

P1dB vs IF Attenuation

RF Isolation vs RF Frequency

LO Leakage vs LO Frequency

1.8GHz Conv Gain, IIP3, NF and

RF Input P1dB vs Temperature

3dB

6dB

9dB

12dB

15dB

0dB

15dB

IIP3

RF FREQUENCY (GHz)

1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2

–9

–6

–3

5556 G36

0dB

3dB

6dB

9dB

12dB

15dB

RF FREQUENCY (GHz)

1.4

1.5

1.6

1.7

1.9

2.0

2.1

2.2

5556 G37

0dB

3dB

6dB

9dB

12dB

15dB

LO = 1.53GHz

RF = 1.55GHz to 2.05GHz

IF FREQUENCY (MHz)

20 70 120 170 220 270 320 370 420 470 520

–10

–8

–6

–4

–2

5556 G38

IIP3

3dB IF ATTEN

–40°C

25°C

85°C

LO INPUT POWER (dBm)

–6

–4

–2

5556 G39

IIP3

FULL PWR

RED. PWR

IF ATTENUATION (dB)

–9

–6

–3

5556 G40

IFOUT P1dB

RFIN P1dB

FULL PWR

RED. PWR

IF ATTENUATION (dB)

5556 G41

RF–IF+

RF–IF–

RF–LO

CHANNEL ISOLATION

3dB IF ATTEN

RF FREQUENCY (GHz)

1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2

5556 G42

LO–IF+ or LO–IF–

LO–RF

3dB IF ATTEN

LO FREQUENCY (GHz)

0.5

1.5

2.5

–70

–65

–60

–55

–50

–45

–40

–35

–30

5556 G43

IIP3

INPUT P1dB

3dB IF ATTEN

CASE TEMPERATURE (°C)

–45

–15

105

5556 G44

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