Datasheet

AD9238
Rev. C | Page 5 of 48
AC SPECIFICATIONS
AVDD = 3 V, DRVDD = 2.5 V, maximum sample rate, CLK_A = CLK_B; A
IN
= −0.5 dBFS differential input, 1.0 V internal reference,
T
MIN
to T
MAX
, DCS enabled, unless otherwise noted.
Table 2.
Test AD9238BST/BCP-20 AD9238BST/BCP-40 AD9238BST/BCP-65
Parameter Temp Level Min Typ Max Min Typ Max Min Typ Max Unit
SIGNAL-TO-NOISE RATIO (SNR)
f
INPUT
= 2.4 MHz 25°C V 70.4 70.4 70.3 dB
f
INPUT
= 9.7 MHz Full V 70.2 dB
25°C IV 69.7 70.4 dB
f
INPUT
= 19.6 MHz Full V 70.1 dB
25°C IV 69.7 70.3 dB
f
INPUT
= 32.5 MHz Full V 69.3 dB
25°C IV 68.7 70.0 dB
f
INPUT
= 100 MHz 25°C V 68.7 68.3 67.6 dB
SIGNAL-TO-NOISE AND DISTORTION
RATIO (SINAD)
f
INPUT
= 2.4 MHz 25°C V 70.2 70.2 70.1 dB
f
INPUT
= 9.7 MHz Full V 70.1 dB
25°C IV 69.3 70.2 dB
f
INPUT
= 19.6 MHz Full V 69.9 dB
25°C IV 69.4 70.1 dB
f
INPUT
= 32.5 MHz Full V 68.9 dB
25°C IV 68.1 69.1 dB
f
INPUT
= 100 MHz 25°C V 67.9 67.9 66.6 dB
EFFECTIVE NUMBER OF BITS (ENOB)
f
INPUT
= 2.4 MHz 25°C V 11.5 11.5 11.4 Bits
f
INPUT
= 9.7 MHz Full V 11.4 Bits
25°C IV 11.3 11.5 Bits
f
INPUT
= 19.6 MHz Full V 11.4 Bits
25°C IV 11.3 11.4 Bits
f
INPUT
= 32.5 MHz Full V 11.2 Bits
25°C IV 11.1 11.3 Bits
f
INPUT
= 100 MHz 25°C V 11.1 11.1 10.9 Bits
WORST HARMONIC (SECOND or THIRD)
f
INPUT
= 9.7 MHz Full V −84.0 dBc
f
INPUT
= 19.6 MHz Full V −85.0 dBc
f
INPUT
= 35 MHz Full V −80.0 dBc
SPURIOUS-FREE DYNAMIC RANGE (SFDR)
f
INPUT
= 2.4 MHz 25°C V 86.0 86.0 86.0 dBc
f
INPUT
= 9.7 MHz Full V 84.0 dBc
25°C I 76.1 86.0 dBc
f
INPUT
= 19.6 MHz Full V 85.0 dBc
25°C I 76.7 86.0 dBc
f
INPUT
= 32.5 MHz Full V 80.0 dBc
25°C I 72.5 80.5 dBc
f
INPUT
= 100 MHz 25°C V 75.0 dBc
CROSSTALK Full V −85.0 −85.0 −85.0 dB