Datasheet

AD9237 Data Sheet
Rev. B | Page 4 of 24
DIGITAL SPECIFICATIONS
Table 2.
AD9237BCP-20 AD9237BCP-40 AD9237BCP-65
Parameter Min Typ Max Min Typ Max Min Typ Max Unit
LOGIC INPUTS
High Level Input Voltage 2.0 2.0 2.0 V
Low Level Input Voltage
0.8
0.8
0.8
V
High Level Input Current
–10
+10
–10
+10
–10
+10
µA
Low Level Input Current –10 +10 –10 +10 –10 +10 µA
Input Capacitance 2 2 2 pF
LOGIC OUTPUTS
1
DRVDD = 3.3 V
High-Level Output Voltage (IOH = 50 µA) 3.29 3.29 3.29 V
High-Level Output Voltage (IOH = 0.5 mA) 3.25 3.25 3.25 V
Low-Level Output Voltage (IOL = 1.6 mA) 0.2 0.2 0.2 V
Low-Level Output Voltage (IOL = 50 µA) 0.05 0.05 0.05 V
DRVDD = 2.5 V
High-Level Output Voltage (IOH = 50 µA) 2.49 2.49 2.49 V
High-Level Output Voltage (IOH = 0.5 mA) 2.45 2.45 2.45 V
Low-Level Output Voltage (IOL = 1.6 mA) 0.2 0.2 0.2 V
Low-Level Output Voltage (IOL = 50 µA)
0.05
0.05
0.05
V
1
Output voltage levels measured with 5 pF load on each output.
AC SPECIFICATIONS
AVDD = 3 V, DRVDD = 2.5 V, maximum sample rate, 2 V p-p differential input, A
IN
= –0.5 dBFS, 1.0 V internal reference, T
MIN
to T
MAX
,
unless otherwise noted.
Table 3.
AD9237BCP-20 AD9237BCP-40 AD9237BCP-65
Parameter Min Typ Max Min Typ Max Min Typ Max Unit
SIGNAL-TO-NOISE RATIO (SNR)
f
INPUT
= 2.4 MHz 66.8 66.5 66.5 dBc
f
INPUT
= 9.7 MHz 65.6 66.6 dBc
f
INPUT
= 19.6 MHz 65.3 66.6 dBc
f
INPUT
= 34.2 MHz 64.0 66.1 dBc
f
INPUT
= 70 MHz 66.0 66.3 65.9 dBc
SIGNAL-TO-NOISE RATIO AND DISTORTION (SINAD)
f
INPUT
= 2.4 MHz 66.7 66.4 66.3 dBc
f
INPUT
= 9.7 MHz 65.1 66.5 dBc
f
INPUT
= 19.6 MHz 64.4 66.4 dBc
f
INPUT
= 34.2 MHz 63.5 65.8 dBc
f
INPUT
= 70 MHz 65.6 65.8 65.2 dBc
EFFECTIVE NUMBER OF BITS (ENOB)
f
INPUT
= 9.7 MHz 10.8 Bits
f
INPUT
= 19.6 MHz 10.7 Bits
f
INPUT
= 34.2 MHz 10.6 Bits