ADMV1014ACCZ-R7 datasheet(32/42 Pages) AD

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ADMV1014

Data Sheet

Rev. A | Page 32 of 42

BASEBAND QUADRATURE DEMODULATION TO

VERY LOW FREQUENCIES

Figure 107 to Figure 111 show the I/Q mode performance at

low baseband frequencies. The measurements were performed

at 28 GHz, −25 dBm input power, VCM = 1.15 V, Register 0x03,

Bit 11 = 1, Register 0x03, Bit 8 = 0, 6 dBm LO input power, and

TA = 25°C.

350

100

250

150

200

300

1100M

10M

100k

10k

100

BASEBAND FREQUENCY (Hz)

Q DIFFERENTIAL

I DIFFERENTIAL

Figure 107. I and Q Differential Peak-to-Peak Voltage vs. Baseband Frequency

1100M

10M

100k

10k

100

BASEBAND FREQUENCY (Hz)

Q GAIN

I GAIN

Figure 108. Conversion Gain vs. Baseband Frequency

BASEBAND FREQUENCY (Hz)

AMPLITUDE IMBALANCE

PHASE IMBALANCE

100M

10M

100k

10k

100

Figure 109. Amplitude Imbalance and Phase Imbalance vs. Baseband Frequency

BASEBAND FREQUENCY (Hz)

IMAGE REJECT

100M

10M

100k

10k

100

Figure 110. Image Rejection vs. Baseband Frequency

350

100

250

150

200

300

100M

10M

100k

10k

100

BASEBAND FREQUENCY (Hz)

Q DIFFERENTIAL

I DIFFERENTIAL

Figure 111. DC Offset Error vs. Baseband Frequency

PERFORMANCE AT DIFFERENT QUAD FILTER

SETTINGS

Figure 112 shows the conversion gain vs. RF frequency in IF

mode at 25°C and LO input power = 6 dBm, for different

QUAD_FILTERS settings. Figure 113 shows the LO to IF_I and

LO to IF_Q leakage vs. LO frequency at different quad filter

settings.

RF FREQUENCY (GHz)

QUAD_FILTERS = 0

QUAD_FILTERS = 5

QUAD_FILTERS = 10

QUAD_FILTERS = 15

–30

–25

–20

–15

–10

–5

Figure 112. Conversion Gain vs. RF Frequency for Four Different

QUAD_FILTERS Settings, fIF = 3.5 GHz (Upper Sideband)

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