SWITCHING SPECIFICATIONS

1

Test

AD6640AST

Parameter (Conditions)

Temp

Level

Min

Typ

Max

Units

Maximum Conversion Rate

Full

VI

65

MSPS

Minimum Conversion Rate

2

Full

IV

6.5

MSPS

+25

°C

V

400

ps

Aperture Uncertainty (Jitter)

+25

°C

V

0.3

ps rms

ENCODE Pulsewidth High

3

+25

°C

IV

6.5

ns

ENCODE Pulsewidth Low

+25

°C

IV

6.5

ns

4

Full

IV

8.5

10.5

12.5

ns

NOTES

ENC to the time when all output data bits are within valid logic levels.

Specifications subject to change without notice.

Test

AD6640AST

Parameter (Conditions)

Temp

Level

Min

Typ

Max

Units

SNR

Analog Input

2.2 MHz

+25

°CV

68

dB

@ –1 dBFS

15.5 MHz

+25

°C

I

64

67.7

dB

31.0 MHz

+25

°C

V

67.5

dB

69.0 MHz

+25

°CV

66

dB

SINAD

Analog Input

2.2 MHz

+25

°CV

68

dB

@ –1 dBFS

15.5 MHz

+25

°C

I

63.5

67.2

dB

31.0 MHz

+25

°C

V

67.0

dB

69.0 MHz

+25

°C

V

65.5

dB

Analog Input

2.2 MHz

+25

°C

V

80

dBc

@ –1 dBFS

15.5 MHz

+25

°C

I

74

80

dBc

31.0 MHz

+25

°C

V

79.5

dBc

69.0 MHz

+25

°C

V

78.5

dBc

Analog Input

2.2 MHz

+25

°C

V

85

dBc

@ –1 dBFS

15.5 MHz

+25

°C

I

74

85

dBc

31.0 MHz

+25

°C

V

85

dBc

69.0 MHz

+25

°C

V

84

dBc

Multitone SFDR (w/Dither)

3

Eight Tones @ –20 dBFS

Full

V

90

dBFS

Two-Tone IMD Rejection

4

F1, F2 @ –7 dBFS

Full

V

80

dBc

Analog Input Bandwidth

5

+25

°C

V

300

MHz

NOTES

ENCODE differentially.

that the 2nd and 3rd harmonics fall out-of-band, overall performance in the band of interest is typically improved by 5 dB. Worst Harmonic (4th or Higher) includes

4th and higher order harmonics and all other spurious components. Reference Figure 12 for more detail.

(0.5 MHz spacing) are swept from –20 dBFS to –90 dBFS. An open channel at 16 MHz is used to monitor SFDR.

(5 MHz–15 MHz) should be limited to 70 MHz center frequency.

Specifications subject to change without notice.

REV. 0

–3–

AD6640