ADRF6821 datasheet(12/61 Pages) AD

12 / 61 page

ADRF6821

Data Sheet

Rev. A | Page 12 of 61

TYPICAL PERFORMANCE CHARACTERISTICS

All supply pins = 3.3 V, TA = 25°C, high-side LO injection for LO frequencies less than or equal to 1 GHz and equal to 2.8 GHz, low-side

LO injection for frequencies between 1 GHz and 2.8 GHz, internal LO, minimum attenuation setting (DSA setting of 0 dB), MIXER_GAIN_

PEAK = 0, VCM = 1.6 V, and 25 Ω matching resistors on I/Q differential outputs, unless otherwise noted. For linearity measurements, a tone

spacing of 75 MHz is used, unless otherwise noted. All losses from input and output traces and baluns are de-embedded from results.

450

920

1390

1860

2330

2800

RF FREQUENCY (MHz)

MIXER_GAIN_PEAK = 0

MIXER_GAIN_PEAK = 3

Figure 4. Gain vs. RF Frequency for Various MIXER_GAIN_PEAK

(Register 0x003A, Bits[1:0]) Settings

100

200

300

400

500

IF FREQUENCY (MHz)

LO = 1000MHz

LO = 2000MHz

LO = 2800MHz

Figure 5. Gain vs. IF Frequency, RF Sweep with Fixed LO, RF to IF Roll-Off

1.0

0.9

0.7

0.5

0.8

0.6

0.4

0.3

0.2

0.1

280

324

368

412

456

500

IF FREQUENCY (MHz)

+105°C

+27°C

–40°C

Figure 6. Gain Flatness vs. IF Frequency, Fixed LO Frequency of 2000 MHz,

280 MHz IF Frequency Window

0.40

0.35

0.25

0.30

0.20

0.15

0.10

0.05

160

245

330

415

500

IF FREQUENCY (MHz)

+105°C

+27°C

–40°C

Figure 7. Gain Flatness vs. IF Frequency, Fixed LO Frequency of 2000 MHz,

75 MHz IF Frequency Window

160

245

330

415

500

IF FREQUENCY (MHz)

1.0

0.9

0.7

0.5

0.8

0.6

0.4

0.3

0.2

0.1

1.0

0.8

0.4

0.6

0.2

–0.2

–0.4

–0.6

–0.8

–1.0

LO = 1000MHz

LO = 2000MHz

LO = 2800MHz

Figure 8. Gain Flatness vs. IF Frequency for Various LOs, 75 MHz (Left Axis)

and 280 MHz (Right Axis) IF Frequency Window

500

940

1380

1820

2260

2700

RF FREQUENCY (MHz)

+105°C

+27°C

–40°C

Figure 9. Output P1dB vs. RF Frequency

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