Datasheet

AD9258
Rev. A | Page 6 of 44
ADC AC SPECIFICATIONS
AVDD = 1.8 V, DRVDD = 1.8 V, maximum sample rate, VIN = −1.0 dBFS differential input, 1.0 V internal reference, DCS enabled, unless
otherwise noted.
Table 2.
AD9258BCPZ-80 AD9258BCPZ-105 AD9258BCPZ-125
Parameter
1
Temp Min Typ Max Min Typ Max Min Typ Max Unit
SIGNAL-TO-NOISE-RATIO (SNR)
f
IN
= 2.4 MHz 25°C 79.0 78.4 77.7 dBFS
f
IN
= 70 MHz 25°C 77.7 78.3 77.3 78.2 76.8 77.6 dBFS
Full 77.4 76.9 76.0 dBFS
f
IN
= 140 MHz
25°C 77.0 76.6 76.6 dBFS
f
IN
= 200 MHz 25°C 75.3 74.9 75.1 dBFS
SIGNAL-TO-NOISE AND DISTORTION (SINAD)
f
IN
= 2.4 MHz 25°C 78.7 77.8 77.3 dBFS
f
IN
= 70 MHz 25°C 77.5 78.0 77.1 78.0 76.5 77.0 dBFS
Full 77.2 76.7 75.7 dBFS
f
IN
= 140 MHz 25°C 75.1 75.6 75.3 dBFS
f
IN
= 200 MHz 25°C 74.2 72.1 73.6 dBFS
EFFECTIVE NUMBER OF BITS (ENOB)
f
IN
= 2.4 MHz 25°C 12.8 12.6 12.5 Bits
f
IN
= 70 MHz 25°C 12.7 12.6 12.5 Bits
f
IN
= 140 MHz 25°C 12.2 12.3 12.2 Bits
f
IN
= 200 MHz 25°C 12.0 11.7 11.9 Bits
WORST SECOND OR THIRD HARMONIC
f
IN
= 2.4 MHz 25°C −92 −87 −90 dBc
f
IN
= 70 MHz 25°C −91 −87 −92 −87 −88 −83 dBc
Full −87 −87 −83 dBc
f
IN
= 140 MHz 25°C −80 −84 −83 dBc
f
IN
= 200 MHz 25°C −82 −76 −79 dBc
SPURIOUS-FREE DYNAMIC RANGE (SFDR)
f
IN
= 2.4 MHz 25°C 92 87 90 dBc
f
IN
= 70 MHz 25°C 87 91 87 92 83 88 dBc
Full 87 87 83 dBc
f
IN
= 140 MHz 25°C 80 84 83 dBc
f
IN
= 200 MHz 25°C 82 76 79 dBc
SPURIOUS-FREE DYNAMIC RANGE (SFDR)
Without Dither (AIN @ −23 dBFS)
f
IN
= 2.4 MHz 25°C 93 100 88 dBFS
f
IN
= 70 MHz 25°C 95 96 89 dBFS
f
IN
= 140 MHz 25°C 98 96 90 dBFS
f
IN
= 200 MHz 25°C 102 100 89 dBFS
With On-Chip Dither (AIN @ −23 dBFS)
f
IN
= 2.4 MHz 25°C 107 106 107 dBFS
f
IN
= 70 MHz 25°C 106 107 106 dBFS
f
IN
= 140 MHz 25°C 106 105 103 dBFS
f
IN
= 200 MHz 25°C 105 106 105 dBFS