Datasheet

AD9235 Data Sheet
Rev. D | Page 4 of 40
DIGITAL SPECIFICATIONS
Table 2.
Parameter Temp
Test
Level
AD9235BRU/BCP-20 AD9235BRU/BCP-40 AD9235BRU/BCP-65
Unit Min Typ Max Min Typ Max Min Typ Max
LOGIC INPUTS
High Level Input Voltage Full IV 2.0 2.0 2.0 V
Low Level Input Voltage Full IV 0.8 0.8 0.8 V
High Level Input Current Full IV –10 +10 –10 +10 –10 +10 µA
Low Level Input Current Full IV –10 +10 –10 +10 –10 +10 µA
Input Capacitance Full V 2 2 2 pF
LOGIC OUTPUTS
1
DRVDD = 3.3 V
High-Level Output Voltage Full IV 3.29 3.29 3.29 V
(IOH = 50 µA)
High-Level Output Voltage Full IV 3.25 3.25 3.25 V
(IOH = 0.5 mA)
Low-Level Output Voltage Full IV 0.2 0.2 0.2 V
(IOL = 1.6 mA)
Low-Level Output Voltage Full IV 0.05 0.05 0.05 V
(IOL = 50 µA)
DRVDD = 2.5 V
High-Level Output Voltage Full IV 2.49 2.49 2.49 V
(IOH = 50 µA)
High-Level Output Voltage Full IV 2.45 2.45 2.45 V
(IOH = 0.5 mA)
Low-Level Output Voltage Full IV 0.2 0.2 0.2 V
(IOL = 1.6 mA)
Low-Level Output Voltage Full IV 0.05 0.05 0.05 V
(IOL = 50 µA)
1
Output voltage levels measured with 5 pF load on each output.
SWITCHING SPECIFICATIONS
Table 3.
Parameter Temp
Test
Level
AD9235BRU/BCP-20 AD9235BRU/BCP-40 AD9235BRU/BCP-65
Unit Min Typ Max Min Typ Max Min Typ Max
CLOCK INPUT PARAMETERS
Maximum Conversion Rate Full VI 20 40 65 MSPS
Minimum Conversion Rate Full V 1 1 1 MSPS
CLK Period Full V 50.0 25.0 15.4 ns
CLK Pulse-Width High
1
Full V 15.0 8.8 6.2 ns
CLK Pulse-Width Low
1
Full V 15.0 8.8 6.2 ns
DATA OUTPUT PARAMETERS
Output Delay
2
(t
PD
) Full V 3.5 3.5 3.5 ns
Pipeline Delay (Latency) Full V 7 7 7 Cycles
Aperture Delay (t
A
) Full V 1.0 1.0 1.0 ns
Aperture Uncertainty Jitter (t
J
) Full V 0.5 0.5 0.5 ps rms
Wake-Up Time
3
Full V 3.0 3.0 3.0 ms
OUT-OF-RANGE RECOVERY TIME Full V 1 1 2 Cycles
1
For the AD9235-65 model only, with duty cycle stabilizer enabled. DCS function not applicable for -20 and -40 models.
2
Output delay is measured from CLK 50% transition to DATA 50% transition, with 5 pF load on each output.
3
Wake-up time is dependent on value of decoupling capacitors; typical values shown with 0.1 µF and 10 µF capacitors on REFT and REFB.