ADMV1013ACCZ-R7 datasheet(28/39 Pages) AD

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ADMV1013

Data Sheet

Rev. A | Page 28 of 39

APPLICATIONS INFORMATION

BASEBAND QUADRATURE MODULATION FROM

LOW FREQUENCIES

Figure 84 shows the I/Q mode performance at low baseband

input frequencies. The measurements were performed at 28 GHz,

−10 dBm input power, VCM = 0 V, Register 0x03, Bit 7 = 0, 0 dBm

LO input power, and TA = 25°C.

100

10k

100k

10M

100M

BASEBAND FREQUENCY (Hz)

SIDEBAND REJECTION

CONVERSION GAIN

Figure 84. Conversion Gain and Sideband Rejection vs. Baseband Frequency

PERFORMANCE AT DIFFERENT QUAD FILTER

SETTINGS

Figure 85 shows the conversion gain vs. RF frequency in

IF mode at TA = 25°C and LO input power = 0 dBm for

different QUAD_FILTERS settings.

–10

–8

–6

–4

–2

RF FREQUENCY (GHz)

QUAD FILTERS = 0

QUAD FILTERS = 5

QUAD FILTERS = 10

QUAD FILTERS = 15

Figure 85. Conversion Gain vs. RF Frequency for Four Different

QUAD_FILTERS Settings, fIF = 3.5 GHz (Upper Sideband)

Figure 86 shows the 4× LO to RF leakage vs. 4× LO frequency at

different quad filter settings.

–60

–55

–50

–45

–40

–35

–30

–25

–20

–15

–10

–5

16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48

4× LO FREQUENCY (GHz)

QUAD FILTERS = 0

QUAD FILTERS = 5

QUAD FILTERS = 10

QUAD FILTERS = 15

Figure 86.4× LO to RF Leakage vs. 4× LO Frequency for Four Different

QUAD_FILTERS Settings

VVA TEMPERATURE COMPENSATION

Figure 87 shows the conversion gain vs. RF frequency at two

different Register 0x0A settings, the recommended setting

(0xE700) and a setting for higher gain, and three different

temperatures for IF mode. The recommended value suggested

in the Start-Up Sequence section provides the least variation in

conversion gain over temperature. If the priority is to increase

the conversion gain, Register 0x0A can be set to 0xFA00.

However, at this value, the conversion gain variation over

temperature can increase by 2 dB.

RF FREQUENCY (GHz)

–40°C, 0xFA00

+25°C, 0xFA00

+85°C, 0xFA00

–40°C, 0xE700

+25°C, 0xE700

+85°C, 0xE700

Figure 87. Conversion Gain vs. RF Frequency at Maximum Gain for

Various Temperatures and Register 0x0A Settings (Recommended and

Higher Gain Setting), fIF = 3.5 GHz

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