HMC305LP4_09 Datasheet, PDF (5/8 Pages) Hittite Microwave Corporation – 0.5 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR, 0.7 - 3.8 GHz

HMC305LP4 / 305LP4E
v03.0809
0.5 dB LSB GaAs MMIC 5-BIT SERIAL
CONTROL DIGITAL ATTENUATOR, 0.7 - 3.8 GHz
5
Pin Descriptions
Pin Number
Function
Description
Interface Schematic
1, 3, 4, 6, 10, 12, 13,
15, 16, 18
N/C
These pins should be connected to PCB RF ground to
maximize performance.
2, 17
RF1, RF2
This pin is DC coupled and matched to 50 Ohms
Blocking capacitors are required. Select value based
on lowest frequency of operation.
5
Serial Output
Serial data output. Serial input data
delayed by 8 clock cycles
7
8
9
11
14
19 - 24
Reset
Shift Clock
Latch Enable
Serial Input
See truth table, control voltage table and timing diagram.
Vcc
GND
Supply Voltage.
Package bottom has an exposed metal paddle that must also
be connected to RF/DC Ground.
5 - 64
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20 Alpha Road, Chelmsford, MA 01824 Phone: [phone] Fax: [phone]
Order On-line at www.hittite.com