HMC288MS8
/
288MS8E
v01.0705
2 dB LSB GaAs MMIC 3-BIT DIGITAL
ATTENUATOR, 0.7 - 3.7 GHz
5
ATTENUATORS - SMT
Typical Applications
The HMC288MS8 / HMC288MS8E is ideal for:
• Cellular
• PCS, ISM, MMDS
• WLL applications
Features
2 dB LSB Steps to 14 dB
Single Positive Control Per BIT
Monotonic: ±03 dB Bit Error Typical
Miniature MSOP-8 Package, 14.8mm
2
Functional Diagram
Electrical Specifi cations,
Parameter
T
A
= +25° C, Vdd = +3V to +5V & Vctl = 0/Vdd (Unless Otherwise Stated)
SO
5V
3V
5V
3V
LE
TE
General Description
Frequency
Min.
Typical
1.0
1.3
1.5
1.7
14
14
11
10
9
17
15
14
12
Max.
1.4
1.7
2.0
2.3
0.7 - 1.4 GHz
1.4 - 2.3 GHz
2.3 - 2.7 GHz
2.7 - 3.7 GHz
0.7 - 3.7 GHz
0.7 - 1.4 GHz
1.4 - 2.3 GHz
2.3 - 2.7 GHz
2.7 - 3.7 GHz
0.7 - 1.4 GHz
1.4 - 2.3 GHz
2.3 - 2.7 GHz
2.7 - 3.7 GHz
0.7 - 3.7 GHz
0.7 - 3.7 GHz
± 0.3 + 3% of Atten. Setting Max
± 0.2 + 3% of Atten. Setting Max
± 0.3 + 3% of Atten. Setting Max
± 0.3 + 4% of Atten. Setting Max
25
22
51
47
560
600
0.7 - 3.7 GHz
The HMC288MS8 & HMC288MS8E are broadband
3-bit positive control GaAs IC digital attenuators in 8
lead MSOP surface mount plastic packages. Cover-
ing 0.7 to 3.7 GHz, the insertion loss is typically less
than 1.2 to 1.8 dB. The attenuator bit values are 2
(LSB), 4, and 8 dB for a total attenuation of 14 dB.
Accuracy is excellent at ± 0.3 dB typical with an
IIP3 of up to +51 dBm. Three 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 sin-
gle Vdd bias of +3 to +5V applied through an external
5K Ohm resistor is required while occupying less than
14.8 mm2.
B
Units
dB
dB
dB
dB
dB
dB
dB
dB
dB
Insertion Loss
O
All Attenuation States
All Attenuation States
All Attenuation States
All Attenuation States
Attenuation Range
Return Loss (RF1 & RF2, All Atten. States)
Attenuation Accuracy: (Referenced to Insertion Loss)
dB
dB
dB
dB
dBm
dBm
dBm
dBm
ns
ns
Input Power for 0.1 dB Compression
Input Third Order Intercept Point
(Two-tone Input Power = 0dBm Each Tone)
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
5 - 34
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
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, please contact Hittite Microwave Corporation:
Devices, Inc.,
For price, delivery, and to place orders: Analog
One Technology Way, P.O. Box 9106, Norwood,
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Order On-line at www.hittite.com
Application Support: Phone: 1-800-ANALOG-D
HMC288MS8
/
288MS8E
v01.0705
2 dB LSB GaAs MMIC 3-BIT DIGITAL
ATTENUATOR, 0.7 - 3.7 GHz
Return Loss RF1, RF2
Insertion Loss
0
-0.5
INSERTION LOSS (dB)
(Only Major States are Shown)
0
2 dB
4 dB
8 dB
14 dB
5
ATTENUATORS - SMT
5 - 35
-5
-1.5
-2
-2.5
-3
-3.5
-4
0.5
+25 C
-40 C
+85 C
RETURN LOSS (dB)
-1
-10
LE
TE
-20
4
-25
0.5
1
1.5
2
2.5
3
3.5
FREQUENCY (GHz)
-15
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
Normalized Attenuation
(Only Major States are Shown)
0
NORMALIZED ATTENUATION (dB)
-2
-4
-6
-8
-10
-12
-14
-16
0.5
Absolute Bit Error
vs. Attenuation State
1.5
1.2
BIT ERROR (dB)
SO
2 dB
4 dB
8 dB
14 dB
0.9
0.9 GHz
1.9 GHz
2.4 GHz
3.5 GHz
0.6
0.3
0
2
4
6
8
10
12
14
ATTENUATION STATE (dB)
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
Absolute Bit Error vs. Frequency
(Only Major States are Shown)
B
2 dB
4 dB
8 dB
14 dB
Relative Phase vs. Frequency
(Only Major States are Shown)
60
O
1.2
1.5
RELATIVE PHASE (deg.)
40
BIT ERROR (dB)
2 dB
4 dB
8 dB
16 dB
0.9
20
0.6
0
0.3
0
0.5
1
1.5
2
2.5
3
3.5
4
-20
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.).
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
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, please contact Hittite Microwave Corporation:
Devices, Inc.,
For price, delivery, and to place orders: Analog
One Technology Way, P.O. Box 9106, Norwood,
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Order On-line at www.hittite.com
Application Support: Phone: 1-800-ANALOG-D
HMC288MS8
/
288MS8E
v01.0705
2 dB LSB GaAs MMIC 3-BIT DIGITAL
ATTENUATOR, 0.7 - 3.7 GHz
5
ATTENUATORS - SMT
Truth Table
Control Voltage Input
V1
8 dB
High
High
High
Low
Low
V2
4 dB
High
High
Low
High
Low
V3
2 dB
High
Low
High
High
Low
Attenuation
Setting
RF1 - RF2
Reference
I.L.
2 dB
Control & Bias Voltages
State
Low
High
Bias Condition
0 to +0.2V @ 20 uA Max.
Vdd ± 0.2V @ 50 uA Max
Note: Vdd = +3V to 5V ± 0.2V
8 dB
14 dB
Max. Atten.
Any combination of the above states will provide an attenuation
approximately equal to the sum of the bits selected.
Application Circuit
5 - 36
O
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 5 or PIN 8.
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
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.
B
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
Devices, Inc.,
For price, delivery, and to place orders: Analog
One Technology Way, P.O. Box 9106, Norwood,
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Order On-line at www.hittite.com
Application Support: Phone: 1-800-ANALOG-D
SO
LE
TE
4 dB
HMC288MS8
/
288MS8E
v01.0705
2 dB LSB GaAs MMIC 3-BIT DIGITAL
ATTENUATOR, 0.7 - 3.7 GHz
Absolute Maximum Ratings
Control Voltage (V1, V2, V3)
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
-40 to +85 °C
+28 dBm
5
ATTENUATORS - SMT
5 - 37
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Outline Drawing
B
O
Package Information
Part Number
HMC288MS8
HMC288MS8E
Package Body Material
Low Stress Injection Molded Plastic
RoHS-compliant Low Stress Injection Molded Plastic
SO
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.
[1] Max peak reflow temperature of 235 °C
[2] Max peak reflow temperature of 260 °C
[3] 4-Digit lot number XXXX
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
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, please contact Hittite Microwave Corporation:
Devices, Inc.,
For price, delivery, and to place orders: Analog
One Technology Way, P.O. Box 9106, Norwood,
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Order On-line at www.hittite.com
Application Support: Phone: 1-800-ANALOG-D
LE
TE
Lead Finish
Sn/Pb Solder
100% matte Sn
MSL Rating
MSL1
MSL1
[1]
Package Marking
[3]
H288
XXXX
H288
XXXX
[2]
HMC288MS8
/
288MS8E
v01.0705
2 dB LSB GaAs MMIC 3-BIT DIGITAL
ATTENUATOR, 0.7 - 3.7 GHz
5
ATTENUATORS - SMT
Evaluation Circuit Board
B
Description
PCB Mount SMA Connector
DC Pin
5k Ohm Resistor, 0402 Chip
List of Materials for Evaluation PCB 103143
5 - 38
O
Item
J1 - J2
J3 - J6
R1
R2, R3, R4
C1, C2
U1
PCB
[2]
100 Ohm Resistor, 0402 Chip
0402 Chip Capacitor, Select for Lowest Fre-
quency of Operation
HMC288MS8 / HMC288MS8E
Digital Attenuator
103141 Evaluation PCB 1.5” x 1.5”
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Rogers 4350
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
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, please contact Hittite Microwave Corporation:
Devices, Inc.,
For price, delivery, and to place orders: Analog
One Technology Way, P.O. Box 9106, Norwood,
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Order On-line at www.hittite.com
Application Support: Phone: 1-800-ANALOG-D
SO
[1]
LE
TE
* R2 = R3 = R4 = 100 Ohm.
These resistors are optional
and may be used to enhance
decoupling of the RF path
from the control inputs.
The circuit board used in the final 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.
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