AD8339

Data Sheet

Rev. B | Page 8 of 36

TYPICAL PERFORMANCE CHARACTERISTICS

typical of all channels, differential voltages, dBm (50 Ω), phase select code = 0000, unless otherwise noted (see Figure 42).

1.5

0.5

0

1.0

–1.5

–0.5

–1.0

–2.0

–1.5

1.5

–1.0

1.0

–0.5

0

0.5

2.0

REAL (Normalized)

f = 1MHz

CODE 1000

CODE 1100

CODE 0100

CODE 0011

I

Q

CODE 0010

CODE 0000

CODE 0001

Figure 9. Normalized Vector Plot of Phase, Ch 2, Ch 3, and Ch 4 vs. Ch 1;

Ch 1 Fixed at 0°; Ch 2, Ch 3, and Ch 4 Stepped 22.5°/Step; All Codes Displayed

360

0

0000

1111

CODE (Binary)

315

270

225

180

135

90

45

0010

0100

0110

1000

1010

1100

1110

5MHz

1MHz

Figure 10. Representative Phase Delay vs. Binary Phase Select Code

at 1 MHz and 5 MHz; Ch 3 and Ch 4 Are Displayed with Respect to Ch 1

1.0

–1.0

0000

1111

CODE (Binary)

0010

0100

0110

1000

1010

1100

1110

0.5

0

–0.5

–1.0

1.0

0.5

0

–0.5

f = 1MHz

f = 5MHz

CHANNEL 3

CHANNEL 4

CHANNEL 3

CHANNEL 4

Figure 11. Representative Amplitude Error vs. Binary Phase Select Code

at 1 MHz and 5 MHz; Ch 3 and Ch 4 Are Displayed with Respect to Ch 1

2

–2

0000

1111

CODE (Binary)

0010

0100

0110

1000

1010

1100

1110

1

0

–1

–2

2

1

0

–1

f = 1MHz

f = 5MHz

CHANNEL 3

CHANNEL 4

CHANNEL 3

CHANNEL 4

Figure 12. Representative Phase Error vs. Binary Phase Select Code

at 1 MHz and 5 MHz; Ch 3 and Ch 4 Are Displayed with Respect to Ch 1

2

1

20.0µs/DIV

2.5MS/s

400ns/PT

A C2

30.0mV

C2

500mV Ω

C4

500mV Ω

Figure 13. Representative Phase Delays of the I or Q Outputs;

Ch 2 Is Displayed with Respect to Ch 1, for Delays of 22.5°, 45°, 67.5°, and 90°

1

0

–3

–2

–1

1M

50M

10M

RF FREQUENCY (Hz)

I OUTPUT OF CHANNEL 1 SHOWN

CODE 0000

CODE 0001

CODE 0011

CODE 0010

Figure 14. Conversion Gain vs. RF Frequency, First Quadrant,

Baseband Frequency = 10 kHz