AD6642_17 datasheet(6/33 Pages) AD

Part #	AD6642

Description	Dual IF Receiver

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AD6642

Rev. A | Page 5 of 32

AC SPECIFICATIONS

AVDD = 1.8 V, DRVDD = 1.8 V, fS = 185 MSPS, 1.75 V p-p differential input, VIN = −1.0 dBFS differential input, and default SPI, unless

otherwise noted.

Table 2.

Parameter1

Temperature

Min

Typ

Max

Unit

SIGNAL-TO-NOISE-RATIO (SNR)—NSR DISABLED

fIN = 30 MHz

25°C

66.5

dBFS

fIN = 70 MHz

25°C

66.5

dBFS

fIN = 170 MHz

Full

65.7

66.1

dBFS

fIN = 250 MHz

25°C

65.5

dBFS

SIGNAL-TO-NOISE-RATIO (SNR)—NSR ENABLED

22% BW Mode

fIN = 70 MHz

25°C

75.5

dBFS

fIN = 170 MHz

Full

72.8

74.4

dBFS

fIN = 230 MHz

25°C

72.8

dBFS

33% BW Mode

fIN = 70 MHz

25°C

73.7

dBFS

fIN = 170 MHz

Full

71.0

72.6

dBFS

fIN = 230 MHz

25°C

71.0

dBFS

SIGNAL-TO-NOISE-AND DISTORTION (SINAD)

fIN = 30 MHz

25°C

65.5

dBFS

fIN = 70 MHz

25°C

66.3

dBFS

fIN = 170 MHz

Full

64.1

65.6

dBFS

fIN = 250 MHz

25°C

64.3

dBFS

EFFECTIVE NUMBER OF BITS (ENOB)

fIN = 30 MHz

25°C

10.6

Bits

fIN = 70 MHz

25°C

10.7

Bits

fIN = 170 MHz

Full

10.3

10.6

Bits

fIN = 250 MHz

25°C

10.3

Bits

WORST SECOND OR THIRD HARMONIC

fIN = 30 MHz

25°C

−90

dBc

fIN = 70 MHz

25°C

−83

dBc

fIN = 170 MHz

Full

−72

−78

dBc

fIN = 250 MHz

25°C

−80

dBc

SPURIOUS-FREE DYNAMIC RANGE (SFDR)

fIN = 30 MHz

25°C

90

dBc

fIN = 70 MHz

25°C

83

dBc

fIN = 170 MHz

Full

72

78

dBc

fIN = 250 MHz

25°C

80

dBc

WORST OTHER HARMONIC (FOURTH THROUGH EIGHTH)

fIN = 30 MHz

25°C

−100

dBc

fIN = 70 MHz

25°C

−96

dBc

fIN = 170 MHz

Full

−82

−90

dBc

fIN = 250 MHz

25°C

−95

dBc

TWO-TONE SFDR (−7 dBFS)

fIN1 = 169 MHz, fIN2 = 172 MHz

25°C

82

dBc

CROSSTALK2

Full

95

dB

ANALOG INPUT BANDWIDTH

25°C

800

MHz

1 See the AN-835 Application Note, Understanding High Speed ADC Testing and Evaluation, for a complete set of definitions.

2 Crosstalk is measured at 155 MHz with −1 dBFS on one channel and no input on the alternate channel.

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