MICROWAVE CORPORATION
9 - 14
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
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HMC273MS10G
1 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, 0.7 - 3.7 GHz
v02.1100
General Description
Features
Functional Diagram
1 dB LSB Steps to 31 dB
Single Positive Control Per BIT
+/- 0.5 dB Typical Bit Error
Miniature MSOP 10 Package: 14.8mm
2
Electrical Specifi cations,
T
A
= +25 C, Vdd = +3V to +5V & Vctl = 0/Vdd (Unless Otherwise Stated)
Typical Applications
The HMC273MS10G is a broadband 5 - bit positive
control GaAs IC digital attenuator in a 10 lead MSOP
plastic package. Covering 0.7 to 3.7 GHz, the inser-
tion loss is typically less than 2 dB. The attenuator
bit values are 1 (LSB), 2, 4, 8, and 16 dB for a total
attenuation of 31 dB. Accuracy is excellent at 0.5
dB typical with an IIP3 of up to +48 dBm. Five bit
control voltage inputs, toggled between 0 and +3 to
+5 volts, are used to select each attenuation state.
A single Vdd bias of +3 to +5 volts applied through
an external 5K Ohm resistor is required.
The HMC273MS10G is ideal for:
Cellular
PCS, ISM, MMDS
WLL applications
Parameter
Frequency
Min.
Typical
Max.
Units
Insertion Loss
0.7 - 1.4 GHz
1.4 - 2.3 GHz
2.3 - 2.7 GHz
2.7 - 3.7 GHz
1.8
2.1
2.4
2.8
2.4
2.7
3.0
3.5
dB
dB
dB
dB
Attenuation Range
0.7 - 3.7 GHz
31
dB
Return Loss (RF1 & RF2, All Atten. States)
0.7 - 1.4 GHz
1.4 - 2.7 GHz
2.7 - 3.7 GHz
11
14
10
17
20
14
dB
dB
dB
Attenuation Accuracy: (Referenced to Insertion Loss)
All Attenuation States
All Attenuation States
All Attenuation States
1 - 15 dB States
16 - 31 dB States
0.7 - 1.4 GHz
1.4 - 2.3 GHz
2.3 - 2.7 GHz
2.7 - 3.7 GHz
2.7 - 3.7 GHz
0.35 + 3% of Atten. Setting Max
0.25 + 3% of Atten. Setting Max
0.30 + 5% of Atten. Setting Max
0.30 + 5% of Atten. Setting Max
0.50 + 8% of Atten. Setting Max
dB
dB
dB
dB
dB
Input Power for 0.1 dB Compression
Vdd = 5V
Vdd = 3V
0.7 - 3.7 GHz
24
22
dBm
dBm
Input Third Order Intercept Point
(Two-tone Input Power = 0 dBm Each Tone)
Vdd = 5V
Vdd = 3V
0.7 - 3.7 GHz
48
46
dBm
dBm
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
0.7 - 3.7 GHz
560
600
ns
ns
MICROWAVE CORPORATION
9 - 15
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
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-4
-3.5
-3
-2.5
-2
-1.5
-1
-0.5
0
0.5
1
1.5
2
2.5
3
3.5
4
INSERTION LOSS (dB)
FREQUENCY (GHz)
+85 C
-40 C
+25 C
HMC273MS10G
Absolute Bit Error
vs. Attenuation State
Return Loss RF1, RF2
(Only Major States are Shown)
Insertion Loss
Normalized Attenuation
(Only Major States are Shown)
0
0.5
1
1.5
2
0
5
10
15
20
25
30
BIT ERROR (dB)
ATTENUATION STATE (dB)
2.4 GHz
0.9 GHz
1.9 GHz
3.5 GHz
-30
-25
-20
-15
-10
-5
0
0.5
1
1.5
2
2.5
3
3.5
4
RETURN LOSS (dB)
FREQUENCY (GHz)
1 dB
16 dB
31 dB
2 dB
8 dB
4 dB
v02.1100
-35
-30
-25
-20
-15
-10
-5
0
0.5
1
1.5
2
2.5
3
3.5
4
NORMALIZED ATTENUATION (dB)
FREQUENCY (GHz)
1 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, 0.7 - 3.7 GHz
Note: All Data Typical Over Voltage (+3V to +5V) & Temperature (-40 to +85 deg. C.).
Absolute Bit Error vs. Frequency
(Only Major States are Shown)
0
1
2
3
4
0.5
1
1.5
2
2.5
3
3.5
4
BIT ERROR (dB)
FREQUENCY (GHz)
16 dB
8 dB
31 dB
1, 2, 4 dB
-100
-50
0
50
100
150
0
1
2
3
4
RELATIVE PHASE (deg.)
FREQUENCY (GHz)
31 dB
16 dB
1, 2, 4, 8 dB
Relative Phase vs. Frequency
(Only Major States are Shown)
MICROWAVE CORPORATION
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For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
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HMC273MS10G
v02.1100
Control Voltages
Truth Table
Application Circuit
DC blocking capacitors C1 & C2 are required on RF1 & RF2. Choose C1 = C2 = 100 ~ 300 pF to allow lowest customer specifi c
frequency to pass with minimal loss. R1 = 5K Ohm is required to supply voltage to the circuit through either PIN 6 or PIN 10.
1 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, 0.7 - 3.7 GHz
Control Voltage Input
Attenuation
Setting
RF1 - RF2
V1
16 dB
V2
8 dB
V3
4 dB
V4
2 dB
V5
1 dB
High
High
High
High
High
Reference
I.L.
High
High
High
High
Low
1 dB
High
High
High
Low
High
2 dB
High
High
Low
High
High
4 dB
High
Low
High
High
High
8 dB
Low
High
High
High
High
16 dB
Low
Low
Low
Low
Low
31 dB
Max. Atten.
Any combination of the above states will provide an attenuation
approximately equal to the sum of the bits selected.
State
Bias Condition
Low
0 to +0.2 V @ 20 uA Max
High
Vdd 0.2V @ 100 uA Max
Note: Vdd = +3V to 5V 0.2V
MICROWAVE CORPORATION
9 - 17
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
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HMC273MS10G
v02.1100
Absolute Maximum Ratings
Outline Drawing
1 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, 0.7 - 3.7 GHz
Control Voltage (V1 - V5)
Vdd + 0.5 Vdc
Bias Voltage (Vdd)
+8.0 Vdc
Storage Temperature
-65 to +150 C
Operating Temperature
-40 to +85 C
RF Input Power (0.7 - 3.7 GHz)
+26 dBm
NOTES:
1. PACKAGE BODY MATERIAL: LOW STRESS INJECTION MOLDED
PLASTIC SILICA AND SILICON IMPREGNATED.
2. LEADFRAME MATERIAL: COPPER ALLOY
3. LEADFRAME PLATING: Sn/Pb SOLDER
4. DIMENSIONS ARE IN INCHES [MILLIMETERS].
5. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.15mm PER SIDE.
6. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.25mm PER SIDE.
7. ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED
TO PCB RF GROUND.
MICROWAVE CORPORATION
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For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
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Evaluation Circuit Board
The circuit board used in the fi nal application should use RF circuit design techniques. Signal lines should have 50 ohm
impedance while the package ground leads and exposed ground paddle should be connected directly to the ground
plane similar to that shown below. A suffi cient 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
* R2 - R6 = 100 Ohm.
These resistors are optional
and may be used to enhance
decoupling of the RF path
from the control inputs.
v02.1100
HMC273MS10G
1 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, 0.7 - 3.7 GHz
Item Description
J1 - J2
PC Mount SMA Connector
J3 - J6
DC Pin
R1
5k Ohm Resistor, 0402 Chip
R2, R3, R4
100 Ohm Resistor, 0402 Chip
C1, C2
0402 Chip Capacitor, Select for Lowest Frequency of
Operation
U1
HMC273MS10G Digital Attenuator
PCB*
103391 Evaluation PCB 1.5" x 1.5"
*Circuit Board Material: Rogers 4350
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