Applications:


Features:


DescriptionThe PRL2572 is an ACcoupled input, manually programmable, two phase frequency divider with two sets of complementary NECL outputs. It is capable of running at input frequencies in excess of 6.6 GHz. It has a common divideby2 prescalar front end followed by two banks of independent manually programmable dividers, Φ1 and Φ2. The f/2 prescalar output is further divided by 1, 2, 4, or 8 for the Φ1 bank via D0 and D1 of a twobit DIP switch, providing a maximum ratio of 16. It is divided by 2, 4, 8 or 16 for the Φ2 bank via D2 and D3 of a second twobit DIP switch, providing a maximum ratio of 32. All outputs are synchronous with the input frequency and are square waves (50% duty cycle) suitable for driving long lines terminated into 50 Ω/2 V or ACcoupled 50 Ω loads. The PRL2572 is ideal for applications where a high frequency divider or prescalar is needed for triggering or downsampling. The two phases of output enable applications requiring two different ratios from a common reference frequency, and the 1:2 fanout feature enables system synchronization and monitoring/triggering applications from a single reference clock source. Applications for the PRL2572 include data acquisition, test, measurement, R&D, and system integration. The unit includes an AC adapter for readytouse convenience on the bench or in a system. All I/O connectors are SMA. The extruded aluminum housing is suitable for mounting with the optional brackets. 
Fig. 2: PRL2572 Block Diagram
SPECIFICATIONS (0° C ≤ T_{A} ≤ 35° C)*
Symbol  Parameter  PRL2572  Unit  Comments  

Min  Typ  Max  
R_{IN}  Input Resistance  50  Ω  AC Coupled  
C_{C}  Coupling Capacitor  0.08  0.10  0.12  µf  Input TC=50 µs 
I_{DC1}  DC Input Current, +8.5 V  +80  +100  
I_{DC2}  DC Input Current, 8.5 V  285  300  mA  
V_{DC}  DC Input Voltage  ±7.5  ±8.5  ±12  V  
V_{AC}  AC/DC Adapter Input Voltage  103  115  127  V  
V_{INmin}  Minimum pp Input Amplitude  500 350 100 
400 250 50 
mV mV mV 
Sine Wave@ F_{MIN In I} Square Wave, t_{r} < 2 ns Square Wave, t_{r} < 500 ps 

V_{INmax}  Maximum pp Input Amplitude  2.00  1.25  V  Sine or Square Wave  
V_{OH}  Output Hi Voltage @ 100 MHz  1.13  0.90  0.81  V  Output terminated to 50 Ω/2 V 
V_{OL}  Output Lo Voltage @ 100 MHz  1.95  1.60  1.48  V  Output terminated to 50 Ω/2 V 
t_{PLH}  Propagation Delay to Φ1 output ↑  2500  ps  
t_{PHL}  Propagation Delay to Φ1 output ↓  2500  ps  
t_{r}/t_{f}  Rise/Fall Times (20%80%)  200  250  ps  Note (1)  
t_{SKEW1}  Skew ↔ Φ1 or Φ2 outputs  40  120  ps  
t_{SKEW2}  Skew ↔ Φ1 and Φ2 outputs  40  120  ps  D0/D1=10, D2/D3=00  
Jitter, pp  5  10  ps  Note (2)  
F_{MIN In I}  Minimum Input frequency  120  100  MHz  Sine wave input  
F_{MIN In II}  Minimum Input frequency  150  100  KHz  Square wave input, t_{r} < 2 ns  
F_{MAX In I}  Maximum Input frequency  6.0  6.6  GHz  
F_{MAX Out1}  Maximum Output frequency, Φ1  3.00  3.30  GHz  Φ1 outputs  
F_{MAX Out2}  Maximum Output frequency, Φ2  1.50  1.65  GHz  Φ2 outputs  
Size  1.3 x 2.9 x 2.9  in.  
Weight, excl. AC adapter  10  Oz.  
Shipping weight, incl. AC adapter  4  lb. 