HMC274QS16_08 Datasheet, PDF (6/6 Pages) Hittite Microwave Corporation – 1 dB LSB GaAs IC 5-BIT DIGITAL ATTENUATOR, 0.7 - 2.7 GHz

v01.0505
Evaluation PCB
HMC274QS16 / 274QS16E
1 dB LSB GaAs IC 5-BIT DIGITAL
ATTENUATOR, 0.7 - 2.7 GHz
5
* R2 - R6 = 100 Ohm.
These resistors are optional
and may be used to enhance
decoupling of the RF path
from the control inputs.
List of Materials for Evaluation PCB 104976 ^[1]
Item
J1 - J2
J3 - J11
R1
R2 - R6
C1, C2
U1
PCB ^[2]
Description
PCB Mount SMA Connector
DC Pin
5k Ohm Resistor, 0402 Chip
100 Ohm Resistor, 0402 Chip
0402 Chip Capacitor, Select for Lowest
Frequency of Operation
HMC274QS16 / HMC274QS16E
Digital Attenuator
104931 Evaluation PCB
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 below. 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.
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Rogers 4350
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: [phone] Fax: [phone]
Order On-line at www.hittite.com
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