ADF4112BCP datasheet(16/28 Pages) AD

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AD8348

Rev. A | Page 16 of 28

VGA/DEMODULATOR AND BASEBAND AMPLIFIER

IF FREQUENCY (MHz)

100

–1.5

0.5

1.0

1.5

–2.0

–1.0

–0.5

2.0

200

300

400

500

600

700

800

900

1000

2.7V, 0.2V, –40°C

2.7V, 0.2V, +25°C

5V, 0.2V, –40°C

2.7V, 0.2V, +85°C

5V, 0.2V, +25°C

5V, 0.2V, +85°C

Figure 37. Quadrature Phase Error vs. FIF, VGIN = 0.7 V, VPOS = 2.7 V, 5 V,

Temperature = −40°C, +25°C, +85°C

BASEBAND FREQUENCY (MHz)

–1.5

0.5

1.0

1.5

–2.0

–1.0

–0.5

2.0

2025

3035

5V, 0.7V, +85°C

2.7V, 0.7V, +85°C

2.7V, 0.7V, –40°C

5V, 0.7V, –40°C

2.7V, 0.7V, +25°C

5V, 0.7V, +25°C

Figure 38. Quadrature Phase Error vs. FBB, VGIN = 0.7 V, VPOS = 2.7 V, 5 V,

Temperature = −40°C, +25°C, +85°C, FIF = 380 MHz

BASEBAND FREQUENCY (MHz)

–0.4

–0.2

0.2

0.4

2025

3035

5V, 0.7V, 25°C

Figure 39. I/Q Amplitude Imbalance vs. FBB, Temperature = 25°C, VPOS = 5 V

IF FREQUENCY (MHz)

–1.5

0.5

1.0

1.5

–2.0

–1.0

–0.5

2.0

200

100

300

400

500

600

700

800

900

1000

Figure 40. I/Q Amplitude Imbalance vs. FIF, Temperature = 25°C, VPOS = 5 V

IF FREQUENCY (MHz)

150

250

100

160

140

120

220

200

180

300

280

260

240

0.2

0.8

0.6

0.4

1.4

1.2

1.0

2.2

2.0

1.8

1.6

350

450

550

650

750

850

950

SHUNT CAPACITANCE

SHUNT RESISTANCE

Figure 41. Input Impedance of IF Input vs. FIF, VGIN = 0.7 V, VPOS = 5 V

180

330

270

300

120

240

150

210

IMPEDANCE CIRCLE

IFIP WITH L PAD

IFIP WITHOUT L PAD

Figure 42. S11 of IF Input vs. FIF, FIF = 50 MHz to 1 GHz, VGIN = 0.7 V,

VPOS = 5 V (with L Pad, with No Pad, Normalized to 50 Ω)

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