AD8333 データシートの表示（PDF） - Analog Devices

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AD8333

DC to 50 MHz, Dual I/Q Demodulator and Phase Shifter

Analog Devices 

AD8333

TYPICAL PERFORMANCE CHARACTERISTICS

VS = ±5 V, TA = 25°C, 4fLO = 20 MHz, fLO = 5 MHz, fRF = 5.01 MHz, fBB = 10 kHz, PLO ≥ 0 dBm (50 Ω); single-ended sine wave;

per channel performance, differential voltages, dBm (50 Ω), phase select code = 0000, unless otherwise noted (see Figure 41).

1.5 f = 1MHz

Q

I

1.0

0.5

CODE 1000

0

–0.5

CODE 0100

CODE 0011

CODE 0010

CODE 0001

CODE 0000

2

f = 5MHz

1

0

–1

–2

2

f = 1MHz

1

–1.0

CODE 1100

–1.5

–2.0 –1.5 –1.0 –0.5 0

0.5 1.0 1.5 2.0

REAL (Normalized)

0

–1

–2

0000

0010

0100

0110 1000 1010

CODE (Binary)

1100

1110

1111

Figure 8. Normalized Vector Plot of Phase, CH2 with Respect to CH1;

CH1 Is Fixed at 0°, CH2 Stepped 22.5°/Step, All Codes Displayed

Figure 11. Phase Error of CH2 with Respect to CH1 vs.

Code at 1 MHz and 5 MHz

360

1MHz

315 5MHz

500mV

270

225

180

135

90

45

0

0000

0010

0100

0110 1000 1010

CODE (Binary)

1100

1110

1111

Figure 9. Phase of CH2 with Respect to CH1 vs. Code, at 1 MHz and 5 MHz

1.0

f = 5MHz

0.5

0

–0.5

–1.0

1.0

f = 1MHz

0.5

0

–0.5

–1.0

0000

0010

0100

0110 1000 1010

CODE (Binary)

1100

1110

1111

20µs

Figure 12. I or Q Output of CH2 with Respect to CH1, First Quadrant Shown

7

CHANNEL 1, I OUTPUT SHOWN

6

CODE 0000

CODE 0001

CODE 0010

CODE 0011

5

4

3

1M

10M

50M

RF FREQUENCY (Hz)

Figure 10. Amplitude Error of CH2 with Respect to CH1 vs.

Code at 1 MHz and 5 MHz

Figure 13. Conversion Gain vs. RF Frequency, First Quadrant,

Baseband Frequency = 10 kHz

Rev. A | Page 8 of 28

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