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
ATTENUATORS - DIGITAL - SMT
5
5 - 39
Application Circuit
DC blocking capacitors C1 & C2 are required on RF1 &
RF2. Choose C1 = C2 = 100 ~ 300 pF to allow lowest
customer speci c frequency to pass with minimal loss.
R1 = 5K Ohm is required to supply voltage to the circuit
through either PIN 3 or PIN 1.
HMC290 / 290E
2 dB LSB GaAs MMIC 2-BIT DIGITAL
ATTENUATOR, 0.7 - 4.0 GHz
v01.0605
The circuit board used in the nal application should
use RF circuit design techniques. Signal lines
should have 50 ohm impedance while the pack-
age 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 cir-
cuit board as shown is available from Hittite Micro-
wave Corporation upon request.
List of Materials for Evaluation PCB 103372
[1]
Item Description
J1 - J2 PCB 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 HMC290 / HMC290E Digital Attenuator
PCB
[2]
103370 Evaluation PCB 1.5” x 1.5”
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Rogers 4350
Evaluation Circuit Board
* R2 = R3 = 100 Ohm.
These resistors are optional
and may be used to enhance
decoupling of the RF path
from the control inputs.
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responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
For price, delivery, and to place orders: Analog Devices, Inc.,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Application Support: Phone: 1-800-ANALOG-D
