Datasheet

Data Sheet AD9255
Rev. C | Page 5 of 44
ADC AC SPECIFICATIONS
AVDD = 1.8 V, DRVDD = 1.8 V, SVDD = 1.8 V, maximum sample rate, VIN = −1.0 dBFS dierential input, 1.0 V internal reference, DCS
enabled, unless otherwise noted.
Table 2.
Parameter
1
Temp
AD9255BCPZ-80
2
AD9255BCPZ-105
2
AD9255BCPZ-125
2
Unit
Min Typ Max Min Typ Max Min Typ Max
SIGNAL-TO-NOISE-RATIO (SNR)
f
IN
= 2.4 MHz 25°C 79.2 78.9 78.3 dBFS
f
IN
= 70 MHz 25°C 78.9 78.5 78.3 dBFS
Full 78.1 77.6 76.9 dBFS
f
IN
= 140 MHz 25°C 78.0 77.7 77.1 dBFS
f
IN
= 200 MHz 25°C 76.9 76.4 75.5 dBFS
SIGNAL-TO-NOISE-AND DISTORTION (SINAD)
f
IN
= 2.4 MHz 25°C 78.7 78.6 78.0 dBFS
f
IN
= 70 MHz 25°C 78.7 78.0 78.0 dBFS
Full 77.9 77.3 76.7 dBFS
f
IN
= 140 MHz 25°C 76.8 77.0 76.7 dBFS
f
IN
= 200 MHz 25°C
75.8 75.3 74.3
dBFS
EFFECTIVE NUMBER OF BITS (ENOB)
f
IN
= 2.4 MHz 25°C
12.8 12.8 12.7 Bits
f
IN
= 70 MHz 25°C
12.8 12.7 12.7 Bits
f
IN
= 140 MHz 25°C
12.5 12.5 12.4 Bits
f
IN
= 200 MHz 25°C
12.3 12.2 12.0 Bits
WORST SECOND OR THIRD HARMONIC
f
IN
= 2.4 MHz 25°C −88 −90 −88
dBc
f
IN
= 70 MHz 25°C −94 −89 −93
dBc
Full
−91 −88
−85
dBc
f
IN
= 140 MHz 25°C −82 −86 −89
dBc
f
IN
= 200 MHz 25°C −81 −81 −80
dBc
SPURIOUS-FREE DYNAMIC RANGE (SFDR)
f
IN
= 2.4 MHz 25°C 88 90 88
dBc
f
IN
= 70 MHz 25°C 94 89 93
dBc
Full
91
88 85
dBc
f
IN
= 140 MHz 25°C 82 86 89
dBc
f
IN
= 200 MHz 25°C 81 81 80
dBc
SPURIOUS-FREE DYNAMIC RANGE (SFDR)
Without Dither (AIN at −23 dBFS)
f
IN
= 2.4 MHz 25°C 102 99 96
dBFS
f
IN
= 70 MHz 25°C 103 97 99
dBFS
f
IN
= 140 MHz 25°C 104 97 98
dBFS
f
IN
= 200 MHz 25°C 102 101 97
dBFS
With On-Chip Dither (AIN at −23 dBFS)
f
IN
= 2.4 MHz 25°C 110 109 108
dBFS
f
IN
= 70 MHz 25°C 110 108 109
dBFS
f
IN
= 140 MHz 25°C 110 108 109
dBFS
f
IN
= 200 MHz 25°C 110 109 109
dBFS