HMC290
/
290E
v01.0605
2 dB LSB GaAs MMIC 2-BIT DIGITAL
ATTENUATOR, 0.7 - 4.0 GHz
Typical Applications
Features
2 dB LSB Steps to 6 dB
Single Positive Control Per BIT
+/-0.2 dB Typical Bit Error
Miniature SOT 26 Package: 9 mm
2
6
ATTENUATORS - SMT
The HMC290 / HMC290E is ideal for:
• Cellular
• PCS, ISM, MMDS
• WLL Handset & BaseStation
Functional Diagram
General Description
The HMC290 & HMC290E are broadband 2 - bit
positive control GaAs IC digital attenuators in 6 lead
SOT26 surface mount plastic packages. Covering 0.7
to 4 GHz, the insertion loss is typically less than 0.7
dB. The attenuator bit values are 2 (LSB) and 4 dB for
a total attenuation of 6 dB. Accuracy is excellent at ±
0.2 dB typical with an IIP3 of up to +52 dBm. Two bit
control voltage inputs, toggled between 0 and +3 to
+5 volts, are used to select each attenuation state at
less than 50 uA each. A single Vdd bias of +3 to +5
volts applied through an external 5K Ohm resistor is
required. Occupying less than 9 mm2, this is the small-
est 2 - bit digital attenuator available.
Electrical Specifications,
T
A
= +25° C, Vdd = +3V to +5V & Vctl = 0/Vdd (Unless Otherwise Stated)
Parameter
Frequency
0.7 - 1.4 GHz
1.4 - 2.3 GHz
2.3 - 2.7 GHz
2.7 - 4.0 GHz
0.7 - 4.0 GHz
0.7 - 2.7 GHz
2.7 - 4.0 GHz
16
15
Min.
Typical
0.5
0.5
0.6
0.8
6
20
18
Max.
0.7
0.8
0.9
1.2
Units
dB
dB
dB
dB
dB
dB
dB
Insertion Loss
Attenuation Range
Return Loss (RF1 & RF2, All Atten. States)
Attenuation Accuracy: (Referenced to Insertion Loss)
2, 4 dB States
6 dB States
Input Power for 0.1 dB Compression
Input Third Order Intercept Point
(Two-tone Input Power = 0 dBm Each Tone)
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
5V
3V
5V
3V
0.7 - 4.0 GHz
0.7 - 4.0 GHz
0.7 - 4.0 GHz
0.7 - 4.0 GHz
± 0.2 + 2% of Atten. Setting Max
± 0.3 + 2% of Atten. Setting Max
27
24
52
50
dB
dB
dBm
dBm
dBm
dBm
0.7 - 4.0 GHz
400
420
ns
ns
6 - 40
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
HMC290
/
290E
v01.0605
2 dB LSB GaAs MMIC 2-BIT DIGITAL
ATTENUATOR, 0.7 - 4.0 GHz
Insertion Loss
0
-0.25
INSERTION LOSS (dB)
Return Loss RF1, RF2
0
-5
RETURN LOSS (dB)
-10
-15
-20
-25
-30
0.5
2 dB
4 dB
6 dB
6
ATTENUATORS - SMT
-0.5
-0.75
-1
-1.25
-1.5
0.5
+25 C
-40 C
+85 C
1
1.5
2
2.5
3
3.5
4
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
FREQUENCY (GHz)
Normalized Attenuation
0
NORMALIZED ATTENUATION (dB)
-1
-2
-3
-4
-5
-6
-7
-8
0.5
2 dB
4 dB
6 dB
Absolute Bit Error
vs. Attenuation State
1
0.75
BIT ERROR (dB)
0.5
0.9 GHz
2.4 GHz
1.9 GHz
3.5 GHz
0.25
0
1
1.5
2
2.5
3
3.5
4
2
4
ATTENUATION STATE (dB)
6
FREQUENCY (GHz)
Absolute Bit Error vs. Frequency
1
Relative Phase vs. Frequency
20
15
10
5
0
-5
2 dB
4 dB
6 dB
0.75
BIT ERROR (dB)
2 dB
4 dB
6 dB
0.5
0.25
0
0.5
RELATIVE PHASE (deg.)
1
1.5
2
2.5
3
3.5
4
-10
0.5
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
FREQUENCY (GHz)
Note: All Data Typical Over Voltage (+3V to +5V) & Temperature (-40 to +85 deg. C.).
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
6 - 41
HMC290
/
290E
v01.0605
2 dB LSB GaAs MMIC 2-BIT DIGITAL
ATTENUATOR, 0.7 - 4.0 GHz
Truth Table
Control & Bias Voltages
V1
2 dB
High
Low
High
Low
Attenuation
Setting
RF1 - RF2
Reference I.L.
2 dB
4 dB
6 dB
Max. Atten.
State
Low
High
Bias Condition
0 to + 0.2V @ 20 uA Max
Vdd ± 0.2V @ 50 uA Max
6
ATTENUATORS - SMT
Control Voltage Input
V2
4 dB
High
High
Low
Low
Note: Vdd = +3V to 5V ± 0.2V
Any combination of the above states will provide an attenuation
approximately equal to the sum of the bits selected.
Application Circuit
DC blocking capacitors C1 & C2 are required on RF1 & RF2. Choose C1 = C2 = 100 ~ 300 pF to allow lowest customer specific
frequency to pass with minimal loss. R1 = 5K Ohm is required to supply voltage to the circuit throught either PIN 3 or PIN 1.
6 - 42
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
HMC290
/
290E
v01.0605
2 dB LSB GaAs MMIC 2-BIT DIGITAL
ATTENUATOR, 0.7 - 4.0 GHz
Absolute Maximum Ratings
Control Voltage (V1, V2)
Bias Voltage (Vdd)
Storage Temperature
Operating Temperature
RF Input Power (0.7 - 4 GHz)
Vdd + 0.5 Vdc
+ 8.0 Vdc
-65 to +150 °C
6
ATTENUATORS - SMT
NOTES:
1. LEADFRAME MATERIAL: COPPER ALLOY
2. DIMENSIONS ARE IN INCHES [MILLIMETERS]
3. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.15mm PER SIDE.
4. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.25mm PER SIDE.
5. ALL GROUND LEADS MUST BE SOLDERED TO PCB RF GROUND
-40 to +85 °C
+28 dBm
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Outline Drawing
Package Information
Part Number
HMC290
HMC290E
Package Body Material
Low Stress Injection Molded Plastic
RoHS-compliant Low Stress Injection Molded Plastic
Lead Finish
Sn/Pb Solder
100% matte Sn
MSL Rating
MSL1
MSL1
[1]
Package Marking
[3]
H290
XXXX
290E
XXXX
[2]
[1] Max peak reflow temperature of 235 °C
[2] Max peak reflow temperature of 260 °C
[3] 4-Digit lot number XXXX
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
6 - 43
HMC290
/
290E
v01.0605
2 dB LSB GaAs MMIC 2-BIT DIGITAL
ATTENUATOR, 0.7 - 4.0 GHz
Evaluation Circuit Board
6
ATTENUATORS - SMT
* R2 = R3 = 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 103372
Item
J1 - J2
J3 - J6
R1
R2, R3
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
HMC290 / HMC290E Digital Attenuator
103370 Evaluation PCB 1.5” x 1.5”
[1]
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.
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Rogers 4350
6 - 44
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
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