Datasheet

AD9640
Rev. B | Page 7 of 52
ADC AC SPECIFICATIONS—AD9640ABCPZ-80, AD9640BCPZ-80, AD9640ABCPZ-105, AND AD9640BCPZ-105
AVDD = 1.8 V, DVDD = 1.8 V, DRVDD = 3.3 V, maximum sample rate, VIN = −1.0 dBFS differential input, 1.0 V internal reference,
DCS enabled, fast detect outputs disabled, and signal monitor disabled, unless otherwise noted.
Table 3.
Parameter
1
Temperature
AD9640ABCPZ-80/
AD9640BCPZ-80
AD9640ABCPZ-105/
AD9640BCPZ-105
Unit
Min Typ Max Min Typ Max
SIGNAL-TO-NOISE RATIO (SNR)
f
IN
= 2.3 MHz 25°C 72.5 72.3 dB
f
IN
= 70 MHz 25°C 72.1 71.9 dB
Full 70.5 70.2 dB
f
IN
= 140 MHz 25°C 71.6 71.3 dB
f
IN
= 200 MHz 25°C 71.0 70.3 dB
SIGNAL-TO-NOISE AND DISTORTION (SINAD)
f
IN
= 2.3 MHz 25°C 72.2 72.0 dB
f
IN
= 70 MHz 25°C 71.6 71.6 dB
Full 69 69.5 dB
f
IN
= 140 MHz 25°C 71.1 70.9 dB
f
IN
= 200 MHz 25°C 70.4 70.0 dB
EFFECTIVE NUMBER OF BITS (ENOB)
f
IN
= 2.3 MHz 25°C 11.9 11.8 Bits
f
IN
= 70 MHz 25°C 11.8 11.8 Bits
f
IN
= 140 MHz 25°C 11.7 11.7 Bits
f
IN
= 200 MHz 25°C 11.6 11.5 Bits
WORST SECOND OR THIRD HARMONIC
f
IN
= 2.3 MHz 25°C −87 −87 dBc
f
IN
= 70 MHz 25°C −85 −85 dBc
Full −75 −74 dBc
f
IN
= 140 MHz 25°C −84 −84 dBc
f
IN
= 200 MHz 25°C −83 −83 dBc
SPURIOUS-FREE DYNAMIC RANGE (SFDR)
f
IN
= 2.3 MHz 25°C 87 87 dBc
f
IN
= 70 MHz 25°C 85 85 dBc
Full 75 74 dBc
f
IN
= 140 MHz 25°C 84 84 dBc
f
IN
= 200 MHz 25°C 83 83 dBc
WORST OTHER HARMONIC OR SPUR
f
IN
= 2.3 MHz 25°C −93 −93 dBc
f
IN
= 70 MHz 25°C −89 −89 dBc
Full −82 −81 dBc
f
IN
= 140 MHz 25°C −89 −89 dBc
f
IN
= 200 MHz 25°C −89 −89 dBc
TWO TONE SFDR
f
IN
= 29.1 MHz, 32.1 MHz (−7 dBFS) 25°C 85 85 dBc
f
IN
= 169.1 MHz, 172.1 MHz (−7 dBFS) 25°C 82 82 dBc
CROSSTALK
2
Full −95 −95 dB
ANALOG INPUT BANDWIDTH 25°C 650 650 MHz
1
See Application Note AN-835, Understanding High Speed ADC Testing and Evaluation, for a complete set of definitions.
2
Crosstalk is measured at 100 MHz with −1 dBFS on one channel and no input on the alternate channel.