9
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T
T
E
N
U
A
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S - SM
T
9 - 60
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
0.5 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, 0.7 - 3.8 GHz
General Description
Features
Functional Diagram
The HMC306MS10 & HMC306MS10E are general
purpose broadband 5-bit positive control GaAs IC
digital attenuators in 10 lead MSOP surface mount
plastic packages. Covering 0.7 to 3.8 GHz, the
insertion loss is typically less than 1.5 to 2.3 dB.
These attenuators' bit values are 0.5 (LSB), 1, 2, 4 and
8 dB for a total attenuation of 15.5 dB. Attenuation
accuracy is excellent at 0.2 dB typical with an IIP3
of up to +52 dBm. Five bit control voltage inputs,
toggled between 0 and +3 to +5V, are used to select
each attenuation state at less than 50 uA each. A
single Vdd bias of +3 to +5V applied through an
external 5K Ohm resistor is required.
RoHS-Compliant Product
0.5 dB LSB Steps to 15.5 dB
Single Positive Control Per Bit
0.2 dB Typical Bit Error
Miniature 15 mm
2
Package: MSOP10
Electrical Specifications,
T
A
= +25 C, Vdd= +3V to +5V & VCTL= 0/Vdd (Unless Otherwise Stated)
Typical Applications
The HMC306MS10 / HMC306MS10E is ideal for:
Cellular; UMTS/3G Infrastructure
ISM, MMDS, WLAN, WiMAX
Microwave Radio & VSAT
Test Equipment and Sensors
Parameter
Frequency (GHz)
Min.
Typical
Max.
Units
Insertion Loss
0.7 - 1.4
1.4 - 2.3
2.3 - 2.7
2.7 - 3.8
1.3
1.5
1.8
2.3
1.6
2.0
2.5
2.7
dB
dB
dB
dB
Attenuation Range
15.5
dB
Return Loss (RF1 & RF2, All Atten. States)
0.7 - 1.4
1.4 - 2.3
2.3 - 2.7
2.7 - 3.8
15
14
13
10
21
18
16
13
dB
dB
dB
dB
Attenuation Accuracy: (Referenced to Insertion Loss)
All Attenuation States
0.5 - 7.5 dB States
8.0 - 15.5 dB States
All Attenuation States
0.7 - 1.4
1.4 - 2.3
1.4 - 2.3
2.3 - 3.8
(0.30 + 5% of Atten. Setting) Max.
(0.25 + 3% of Atten. Setting) Max.
(0.15 + 3% of Atten. Setting) Max.
(0.30 + 3% of Atten. Setting) Max.
dB
dB
dB
dB
Input Power for 0.1 dB Compression
Vdd = 5V
Vdd = 3V
0.7 - 3.8
25
23
dBm
dBm
Input Third Order Intercept Point
(Two-tone Input Power = 0 dBm Each Tone)
Vdd = 5V
Vdd = 3V
0.7 - 3.8
52
48
dBm
dBm
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
0.7 - 3.8
560
600
ns
ns
HMC306MS10
/
306MS10E
v05.0905
9
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9 - 61
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
0.5 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, 0.7 - 3.8 GHz
Return Loss RF1, RF2
(Only Major States are Shown)
Absolute Bit Error vs. Attenuation State
Insertion Loss
Normalized Attenuation
(Only Major States are Shown)
Absolute Bit Error vs. Frequency
(Only Major States are Shown)
Relative Phase vs. Frequency
(Only Major States are Shown)
HMC306MS10
/
306MS10E
v05.0905
-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
+25 C
-40 C
+85 C
INSERTION LOSS (dB)
FREQUENCY (GHz)
0
0.3
0.6
0.9
1.2
1.5
0.5
2
3.5
5
6.5
8
9.5
11
12.5
14
15.5
0.9 GHz
1.9 GHz
2.4 GHz
3.5 GHz
BI
T ERROR (dB)
ATTENUATION STATE (dB)
-40
-20
0
20
40
60
0.5
1
1.5
2
2.5
3
3.5
4
2 dB
4 dB
8 dB
15.5 dB
RELATIVE PHASE (deg.)
FREQUENCY (GHz)
0.5, 1 dB
0
0.3
0.6
0.9
1.2
1.5
0.5
1
1.5
2
2.5
3
3.5
4
4 dB
8 dB
15.5 dB
BI
T ERROR (dB)
FREQUENCY (GHz)
0.5, 1, 2 dB
-18
-16
-14
-12
-10
-8
-6
-4
-2
0
0.5
1
1.5
2
2.5
3
3.5
4
0.5 dB
1 dB
2 dB
4 dB
8 dB
15.5 dB
NORMALIZED ATTENUATION (dB)
FREQUENCY (GHz)
-30
-25
-20
-15
-10
-5
0
0.5
1
1.5
2
2.5
3
3.5
4
0.5 dB
1 dB
2 dB
4 dB
8 dB
14 dB
RETURN LOSS (dB)
FREQUENCY (GHz)
9
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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
Application Circuit
Truth Table
Control & Bias Voltages
Note:
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 through either Pin 6
or Pin 10.
Control Voltage Input
Attenuation
State
RF1 - RF2
V1
8 dB
V2
4 dB
V3
2 dB
V4
1 dB
V5
0.5 dB
High
High
High
High
High
Reference I.L.
High
High
High
High
Low
0.5 dB
High
High
High
Low
High
1 dB
High
High
Low
High
High
2 dB
High
Low
High
High
High
4 dB
Low
High
High
High
High
8 dB
Low
Low
Low
Low
Low
15.5 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 +0.2V @ 20 A Max.
High
Vdd
0.2V @ 20 A Max.
Note: Vdd = +3V to 5V
0.00.20.2
0.2V
0.5 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, 0.7 - 3.8 GHz
HMC306MS10
/
306MS10E
v05.0905
9
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U
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S - SM
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9 - 63
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
Outline Drawing
Absolute Maximum Ratings
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 - 3.8 GHz)
+28 dBm
ESD Sensitivity (HBM)
Class 1A
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
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.
Part Number
Package Body Material
Lead Finish
MSL Rating
Package Marking
[3]
HMC306MS10
Low Stress Injection Molded Plastic
Sn/Pb Solder
MSL1
[1]
H306
XXXX
HMC306MS10E
RoHS-compliant Low Stress Injection Molded Plastic
100% matte Sn
MSL1
[2]
H306
XXXX
[1] Max peak refl ow temperature of 235 C
[2] Max peak refl ow temperature of 260 C
[3] 4-Digit lot number XXXX
Package Information
0.5 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, 0.7 - 3.8 GHz
HMC306MS10
/
306MS10E
v05.0905
9
A
T
T
E
N
U
A
T
O
R
S - SM
T
9 - 64
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
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 should be connected directly to the ground
plane similar to that shown. A suffi cient number of
via holes should be used to connect the top and
bottom ground planes. The evaluation circuit board
shown is available from Hittite upon request.
List of Materials for Evaluation PCB 103393
[1]
* R2 - R6= 100 Ohm.
These resistors are
optional and may be used
to enhance decoupling of
the RF path from the con-
trol inputs.
Item
Description
J1 - J2
PCB Mount SMA Connector
J3 - J8
DC Pin
R1
5k Ohm Resistor, 0402 Pkg.
R2 - R6
100 Ohm Resistor, 0402 Pkg.
C1 - C2
0402 Chip Capacitor, Select Value for Lowerst
Frequency
U1
HMC306MS10 / HMC306MS10E
Digital Attenuators
PCB
[2]
103391 Evaluation PCB 1.5" x 1.5"
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Rogers 4350
0.5 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, 0.7 - 3.8 GHz
HMC306MS10
/
306MS10E
v05.0905
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