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HMC288MS8 / 288MS8E
v01.0705
ATTENUATORS - SMT
5
2 dB LSB GaAs MMIC 3-BIT DIGITAL
ATTENUATOR, 0.7 - 3.7 GHz
Typical Applications
Features
The HMC288MS8 / HMC288MS8E is ideal for:
2 dB LSB Steps to 14 dB
• Cellular
Single Positive Control Per BIT
• PCS, ISM, MMDS
Monotonic: ±03 dB Bit Error Typical
• WLL applications
Miniature MSOP-8 Package, 14.8mm2
Functional Diagram
General Description
The HMC288MS8 & HMC288MS8E are broadband
3-bit positive control GaAs IC digital attenuators in 8
lead MSOP surface mount plastic packages. Covering 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 single Vdd bias of +3 to +5V applied through an external
5K Ohm resistor is required while occupying less than
14.8 mm2.
Electrical Specifi cations,
TA = +25° C, Vdd = +3V to +5V & Vctl = 0/Vdd (Unless Otherwise Stated)
Parameter
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
Frequency
Min.
1.0
1.3
1.5
1.7
1.4
1.7
2.0
2.3
dB
dB
dB
dB
Attenuation Range
0.7 - 3.7 GHz
14
dB
Return Loss (RF1 & RF2, All Atten. States)
0.7 - 1.4 GHz
1.4 - 2.3 GHz
2.3 - 2.7 GHz
2.7 - 3.7 GHz
14
11
10
9
17
15
14
12
dB
dB
dB
dB
0.7 - 1.4 GHz
1.4 - 2.3 GHz
2.3 - 2.7 GHz
2.7 - 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
dB
dB
dB
dB
Attenuation Accuracy: (Referenced to Insertion Loss)
All Attenuation States
All Attenuation States
All Attenuation States
All Attenuation States
Input Power for 0.1 dB Compression
5V
3V
0.7 - 3.7 GHz
25
22
dBm
dBm
Input Third Order Intercept Point
(Two-tone Input Power = 0dBm Each Tone)
5V
3V
0.7 - 3.7 GHz
51
47
dBm
dBm
0.7 - 3.7 GHz
560
600
ns
ns
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
5 - 34
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
HMC288MS8 / 288MS8E
v01.0705
2 dB LSB GaAs MMIC 3-BIT DIGITAL
ATTENUATOR, 0.7 - 3.7 GHz
5
Return Loss RF1, RF2
Insertion Loss
(Only Major States are Shown)
2 dB
4 dB
8 dB
14 dB
-5
-1
RETURN LOSS (dB)
INSERTION LOSS (dB)
-0.5
-1.5
-2
-2.5
+25 C
-40 C
+85 C
-3
-10
-15
-20
-3.5
-4
0.5
1
1.5
2
2.5
3
3.5
-25
0.5
4
1
1.5
FREQUENCY (GHz)
2.5
3
(Only Major States are Shown)
4
1.5
0
-2
1.2
BIT ERROR (dB)
-4
-6
-8
-10
2 dB
4 dB
8 dB
14 dB
-12
0.9 GHz
1.9 GHz
2.4 GHz
3.5 GHz
0.9
0.6
0.3
-14
-16
0.5
0
1
1.5
2
2.5
3
3.5
2
4
4
FREQUENCY (GHz)
6
8
10
12
Relative Phase vs. Frequency
(Only Major States are Shown)
(Only Major States are Shown)
60
RELATIVE PHASE (deg.)
1.5
1.2
2 dB
4 dB
8 dB
14 dB
0.9
0.6
0.3
0
0.5
14
ATTENUATION STATE (dB)
Absolute Bit Error vs. Frequency
BIT ERROR (dB)
3.5
Absolute Bit Error
vs. Attenuation State
Normalized Attenuation
NORMALIZED ATTENUATION (dB)
2
FREQUENCY (GHz)
ATTENUATORS - SMT
0
0
1
1.5
2
2.5
FREQUENCY (GHz)
3
3.5
4
2 dB
4 dB
8 dB
16 dB
40
20
0
-20
0.5
1
1.5
2
2.5
3
3.5
4
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
5 - 35
HMC288MS8 / 288MS8E
v01.0705
ATTENUATORS - SMT
5
Truth Table
Control & Bias Voltages
Control Voltage Input
V1
8 dB
V2
4 dB
V3
2 dB
Reference
I.L.
High
High
High
Low
2 dB
High
Low
High
4 dB
Low
High
High
8 dB
Low
14 dB
Max. Atten.
Low
High
Attenuation
Setting
RF1 - RF2
High
Low
2 dB LSB GaAs MMIC 3-BIT DIGITAL
ATTENUATOR, 0.7 - 3.7 GHz
State
Bias Condition
Low
0 to +0.2V @ 20 uA Max.
High
Vdd ± 0.2V @ 50 uA Max
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 5 or PIN 8.
5 - 36
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
HMC288MS8 / 288MS8E
v01.0705
2 dB LSB GaAs MMIC 3-BIT DIGITAL
ATTENUATOR, 0.7 - 3.7 GHz
5
Control Voltage (V1, V2, V3)
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 - 4 GHz)
+28 dBm
ATTENUATORS - SMT
Absolute Maximum Ratings
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Outline Drawing
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.
Package Information
Part Number
Package Body Material
Lead Finish
MSL Rating
HMC288MS8
Low Stress Injection Molded Plastic
Sn/Pb Solder
MSL1
HMC288MS8E
RoHS-compliant Low Stress Injection Molded Plastic
100% matte Sn
MSL1
Package Marking [3]
[1]
H288
XXXX
[2]
H288
XXXX
[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
5 - 37
HMC288MS8 / 288MS8E
v01.0705
Evaluation Circuit Board
ATTENUATORS - SMT
5
2 dB LSB GaAs MMIC 3-BIT DIGITAL
ATTENUATOR, 0.7 - 3.7 GHz
* R2 = R3 = R4 = 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 103143
Item
Description
J1 - J2
PCB 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
HMC288MS8 / HMC288MS8E
Digital Attenuator
PCB [2]
103141 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
5 - 38
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
HMC288MS8 / 288MS8E
v01.0705
2 dB LSB GaAs MMIC 3-BIT DIGITAL
ATTENUATOR, 0.7 - 3.7 GHz
5
ATTENUATORS - SMT
Notes:
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
5 - 39