HMC472LP4 / 472LP4E
v06.1108
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, DC - 3.8 GHz
5
Pin Descriptions
Pin Number
Function
N/C
Description
Interface Schematic
1, 3, 5, 12,
14, 16, 17, 18
These pins should be connected to PCB RF ground to
maximize performance.
2
Vdd
Supply Voltage.
This pin is DC coupled and matched to 50 Ohm.
Blocking capacitors are required. Select value based on
lowest frequency of operation.
4, 15
RF1, RF2
External capacitors to ground are recommended for low and
high frequency operation. Select value for
6 - 11, 13
ACG1 - ACG7
lowest frequency of operation. Place capacitor as close
to pins as possible. For operation from 700 to 2700 MHz,
these pins may be left unconnected.
19 - 24
V1 - V6
See truth table and control voltage table.
Package bottom has an exposed metal paddle that must also
be connected to RF/DC Ground.
GND
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
5 - 145
HITTITE [ HITTITE MICROWAVE CORPORATION ]
