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MAX2769B

Universal GPS Receiver

Typical Operating Characteristics (continued)

input is driven from a 50I source. All RF measurements are done in the analog output mode with ADC bypassed. PGA gain is set

to 51dB gain by serial-interface word GAININ = 111010. Maximum IF output load is not to exceed 10kI||7.5pF on each pin. Typical

LNA2 |S21| AND |S12|

vs. FREQUENCY

FREQUENCY (GHz)

2.25

2.00

0.75 1.00 1.25 1.50 1.75

-40

-30

-20

-10

0

10

20

30

-50

0.50

2.50

|S21|

|S12|

LNA2 GAIN AND NOISE FIGURE

vs. TEMPERATURE

MAX2769B toc08

TEMPERATURE (°C)

60

35

10

-15

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

0

-40

85

12.8

13.0

13.2

13.4

13.6

12.2

12.6

12.4

LNA BIAS = 10

NOISE FIGURE

GAIN

LNA INPUT RETURN LOSS

vs. FREQUENCY

FREQUENCY (GHz)

2.1

2.0

1.9

1.8

1.7

1.6

1.5

1.4

1.3

1.2

1.1

-40

-30

-20

-10

0

-50

1.0

2.2

LNA1

LNA2

LNA OUTPUT RETURN LOSS

vs. FREQUENCY

FREQUENCY (GHz)

2.1

2.0

1.9

1.8

1.7

1.6

1.5

1.4

1.3

1.2

1.1

-15

-10

-5

0

-20

1.0

2.2

LNA1

LNA2

MIXER INPUT REFERRED IP1dB

vs. OFFSET FREQUENCY

OFFSET FREQUENCY (MHz)

250

200

150

100

50

-80

-70

-60

-50

-40

-30

-20

-10

0

-90

0

300

PGA GAIN = 51dB

PGA GAIN = 32dB