HMC394LP4 / 394LP4E
v08.0607
GaAs HBT PROGRAMMABLE
5-BIT COUNTER, DC - 2.2 GHz
6
Typical Applications
Features
Programmable divider for offset synthesizer
and variable divide by N applications:
SSB Phase Noise: -153 dBc/Hz @ 100 kHz
Selectable Division from 2 to 32
Parallel 5-Bit Control
• Satellite Communication Systems
• Point-to-Point and Point-to-Multi-Point Radios
Wide Input Power Range: -20 to +10 dBm
4mm x 4mm Leadless SMT Package
• LMDS
• SONET
Functional Diagram
General Description
The HMC394LP4 & HMC394LP4E are low noise
GaAs HBT programmable 5-bit counters in 4 x 4mm
leadless surface mount packages. This device allows
continuous division from N= 2 to 32 at input frequen-
cies up to 2.2 GHz. The output voltage swing is
800 mV with a duty cycle inversely proportional to N.
The low additive SSB phase noise of -153 dBc/Hz at
100 KHz offset makes this counter an excellent choice
for low noise synthesizer applications.
Electrical Specifications, TA = +25° C, 50 Ohm System, Vcc= 5V
Parameter
Maximum Input Frequency
Minimum Input Frequency
Input Power Range
Conditions
Min.
2.2
Typ.
Max.
Units
GHz
GHz
dBm
dBm
dBc/Hz
ps
Sine Wave Input [1]
Fin = 0.1 to 2.2 GHz
Divide-by-2
0.1
-15
>-20
4
+10
Output Power
SSB Phase Noise
Fin = 1 GHz, N = 4
-153
100
194
Output Transition Time
Supply Current (Icc)
mA
1. Divider will operate down to DC for square-wave input signal.
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
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