HMC291 Datasheet, PDF (5/6 Pages) Hittite Microwave Corporation – 4 dB LSB GaAs MMIC 2-BIT DIGITAL ATTENUATOR, 0.7 - 4.0 GHz

MICROWAVE CORPORATION
v01.0402
HMC291
4 dB LSB GaAs MMIC 2-BIT DIGITAL
ATTENUATOR, 0.7 - 4.0 GHz
Evaluation Circuit Board
9
* R2 = R3 = 100 Ohm.
These resistors are optional
and may be used to enhance
decoupling of the RF path
from the control inputs.
The circuit board used in the final application should use RF circuit design techniques. Signal lines should have 50 ohm
impedance while the package ground leads should be connected directly to the ground plane similar to that shown.
A sufficient number of VIA holes should be used to connect the top and bottom ground planes. The evaluation circuit
board as shown is available from Hittite Microwave Corporation upon request.
List of Material
Item
Description
J1 - J2
PC Mount SMA Connector
J3 - J6
DC Pin
R1
5k Ohm Resistor, 0402 Chip
R2, R3
100 Ohm Resistor, 0402 Chip
C1, C2
0402 Chip Capacitor, Select for Lowest Frequency of
Operation
U1
HMC291 Digital Attenuator
PCB*
103370 Evaluation PCB 1.5” x 1.5”
*Circuit Board Material Rogers 4350
9 - 42
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12 Elizabeth Drive, Chelmsford, MA 01824 Phone: [phone] Fax: [phone]
Order Online at www.hittite.com