ad7011 Analog Devices, Inc., ad7011 Datasheet - Page 11

• Manufacturer Part Number: ad7011
• Description: Cmos, Adc P/4 Dqpsk Baseband Transmit Port
• Manufacturer: Analog Devices, Inc.

REV. B
Figure 13. Reconstruction Filter Frequency Response for
the I and Q DACs, MCLK = 2.56 MHz
Figure 14. AD7011 I vs. Q Waveforms When Transmitting
Random Data
Figure 15. AD7011 Transmit Constellation Diagram
–10
–20
–30
–40
–50
–60
–70
–80
0
0.1
–0.4
–0.4
–0.8
–0.8
–1.2
–1.2
–0.4
–0.8
–1.2
1.2
1.2
0.8
0.8
0.4
0.4
1.2
0.8
0.4
0
0
0
–1.2
–1.2
–1.2
1
–0.8
–0.8
–0.8
FREQUENCY – kHz
–0.4
–0.4
–0.4
I Channel – Volts
I Channel – Volts
I Channel – Volts
10
0
0
0
0.4
0.4
0.4
0.8
0.8
0.8
100
1.2
1.2
1.2
1000
–11–
Figure 16. Reconstruction Filter Frequency Response for
the I and Q DACs, MCLK = 3.1104 MHz
Figure 17. AD7011 I vs. Q Waveforms Filtered by an Ideal
Root Raised Cosine Receive Filter
Figure 18. AD7011 Constellation Diagram When Filtered
by an Ideal Root Raised Cosine Receive Filter
–10
–20
–30
–40
–50
–60
–70
–80
0
0.1
–0.4
–0.8
–1.2
–0.4
–0.8
–1.2
1.2
0.8
0.4
1.2
0.8
0.4
0
0
–1.2
–1.2
1
–0.8
–0.8
FREQUENCY – kHz
–0.4
–0.4
I Channel – Volts
I Channel – Volts
10
0
0
0.4
0.4
0.8
0.8
100
AD7011
1.2
1.2
1000