HMC540LP3 Datasheet, PDF (5/6 Pages) Hittite Microwave Corporation – 1 dB LSB GaAs MMIC 4-BIT DIG POSITIVE CONTROL ATTENUATOR, DC - 5.5 GHz

HMC540LP3 / 540LP3E
v00.0605
1 dB LSB GaAs MMIC 4-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, DC - 5.5 GHz
6
Pin Descriptions
Pin Number
Function
1
Vdd
2, 11
RF1, RF2
3, 7, 9, 10, 12
N/C
4 - 6, 8
ACG1 - ACG4
Description
Supply Voltage.
This pin is DC coupled and matched to 50 Ohm.
Blocking capacitors are required.
Select value based on lowest frequency of operation.
These pins should be connected to PCB RF ground to
maximize performance.
External capacitor to ground is required. Select value for
lowest frequency of operation. Place capacitor as close
to pins as possible.
Interface Schematic
13 - 16
V1 - V4
See truth table and control voltage table.
GND
Application Circuit
Package bottom has an exposed metal paddle that must be
connected to RF/DC Ground.
Recommended Component Values
C1 - C3
1,000 pF ± 10%
C4, C5
330 pF ± 10%
6 - 174
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20 Alpha Road, Chelmsford, MA 01824 Phone: [phone] Fax: [phone]
Order On-line at www.hittite.com