AD6644STSLASHPCB datasheet(10/25 Pages) AD

10 / 25 page

AD6644

Rev. D | Page 9 of 24

TYPICAL PERFORMANCE CHARACTERISTICS

FREQUENCY (MHz)

–120

–130

–110

–100

–90

–80

–70

–60

–50

–40

–30

–20

–10

ENCODE = 65MSPS

AIN = 2.2MHz @ –1dBFS

SNR = 74.5dB

SFDR = 92dBc

Figure 4. Single Tone at 2.2. MHz

FREQUENCY (MHz)

–120

–130

–110

–100

–90

–80

–70

–60

–50

–40

–30

–20

–10

ENCODE = 65MSPS

AIN = 15.5MHz @ –1dBFS

SNR = 74dB

SFDR = 90dBc

Figure 5. Single Tone at 15.5 MHz

FREQUENCY (MHz)

–120

–130

–110

–100

–90

–80

–70

–60

–50

–40

–30

–20

–10

ENCODE = 65MSPS

AIN = 30MHz @ –1dBFS

SNR = 73.5dB

SFDR = 85dBc

Figure 6. Single Tone at 30 MHz

FREQUENCY (MHz)

74.5

73.5

72.5

72.0

74.0

73.0

75.0

T = –25°C

T = +25°C

T = +85°C

ENCODE = 65MSPS, AIN = –1dBFS

TEMP = –25°C, +25°C, +85°C

Figure 7. Noise vs. Analog Frequency (Nyquist)

ANALOG INPUT FREQUENCY (MHz)

T = –25°C, +85°C

T = +25°C

ENCODE = 65MSPS, AIN = –1dBFS

TEMP = –25°C, +25°C, +85°C

Figure 8. Harmonics vs. Analog Frequency (Nyquist)

ANALOG FREQUENCY (MHz)

AIN = –1dBFS

ENCODE = 65MSPS

LOW NOISE ANALOG SOURCE

PHASE NOISE OF ANALOG SOURCE

DEGRADES PERFORMANCE

1020

3040

5060708090

100

Figure 9. Noise vs. Analog Frequency (IF)

AD6644ST/PCB 数据表(PDF) 10 Page - Analog Devices

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