Datasheet

Data Sheet AD9228
Rev. E | Page 5 of 56
AC SPECIFICATIONS
AVDD = 1.8 V, DRVDD = 1.8 V, 2 V p-p differential input, 1.0 V internal reference, AIN = −0.5 dBFS, unless otherwise noted.
Table 2.
AD9228-40 AD9228-65
Parameter
1
Temperature Min Typ Max Min Typ Max Unit
SIGNAL-TO-NOISE RATIO (SNR)
f
IN
= 2.4 MHz Full 70.5 70.2 dB
f
IN
= 19.7 MHz Full 68.5 70.2 70.0 dB
f
IN
= 35 MHz Full 70.2 68.5 70.0 dB
f
IN
= 70 MHz Full 70.0 69.5 dB
SIGNAL-TO-NOISE AND DISTORTION RATIO (SINAD)
f
IN
= 2.4 MHz Full 70.3 70.0 dB
f
IN
= 19.7 MHz Full 68.0 69.8 70.0 dB
f
IN
= 35 MHz Full 69.7 68.0 69.8 dB
f
IN
= 70 MHz Full 69.5 69.0 dB
EFFECTIVE NUMBER OF BITS (ENOB)
f
IN
= 2.4 MHz Full 11.42 11.37 Bits
f
IN
= 19.7 MHz Full 11.1 11.37 11.33 Bits
f
IN
= 35 MHz Full 11.37 11.1 11.33 Bits
f
IN
= 70 MHz Full 11.33 11.25 Bits
SPURIOUS-FREE DYNAMIC RANGE (SFDR)
f
IN
= 2.4 MHz Full 85 85 dBc
f
IN
= 19.7 MHz Full 72 82 85 dBc
f
IN
= 35 MHz Full 80 73 84 dBc
f
IN
= 70 MHz Full 80 74 dBc
WORST HARMONIC (Second or Third)
f
IN
= 2.4 MHz Full −85 −85 dBc
f
IN
= 19.7 MHz Full −82 −72 −85 dBc
f
IN
= 35 MHz Full −80 −84 −73 dBc
f
IN
= 70 MHz Full −80 −74 dBc
WORST OTHER (Excluding Second or Third)
f
IN
= 2.4 MHz Full −90 −90 dBc
f
IN
= 19.7 MHz Full −90 −80 −90 dBc
f
IN
= 35 MHz Full −90 −90 −79 dBc
f
IN
= 70 MHz Full −90 −88 dBc
TWO-TONE INTERMODULATION DISTORTION (IMD)—
AIN1 AND AIN2 = −7.0 dBFS
f
IN1
= 15 MHz, f
IN2
= 16 MHz 25°C 80.8 77.8 dBc
f
IN1
= 70 MHz, f
IN2
= 71 MHz 25°C 75.0 77.0 dBc
1
See the AN-835 Application Note, Understanding High Speed ADC Testing and Evaluation, for definitions and for details on how these tests were completed.