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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HMC230MS8
4 dB LSB GaAs MMIC 3-BIT DIGITAL
ATTENUATOR, 0.75 - 2.0 GHz
v01.0701
General Description
Features
Functional Diagram
4 dB LSB Steps to 28 dB
Single Positive Control Per Bit
+/- 0.5 dB Typical Bit Error
Pin - For - Pin Replacement to
AA100-59 Digital Attenuator
Electrical Specifi cations,
T
A
= +25 C, Vdd = +3V to +5V & Vctl = 0/Vdd (Unless Otherwise Stated)
Typical Applications
The HMC230MS8 is a broadband 3 - bit positive
control GaAs IC digital attenuator in an 8 lead MSOP
surface mount plastic package. Covering 0.75 to
2 GHz, the insertion loss is typically less than 2
dB. The attenuator bit values are 4 (LSB), 8, and
16 dB for a total attenuation of 28 dB. Accuracy is
excellent at 0.5 dB typical with an IIP3 of up to
+48 dBm. Three 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.
The HMC230MS8 is ideal for:
Cellular
PCS, ISM, MMDS
WLL Handset
Base Station Infrastructure
Parameter
Frequency
Min.
Typical
Max.
Units
Insertion Loss
0.75 - 1.7 GHz
1.7 - 2.0 GHz
1.6
1.8
1.8
2.1
dB
dB
Attenuation Range
0.75 - 2.0 GHz
28
dB
Return Loss (RF1 & RF2, All Atten. States)
0.75 - 1.7 GHz
1.7 - 2.0 GHz
10
13
13
16
dB
dB
Attenuation Accuracy: (Reference to Insertion Loss)
4, 8, 12, 16, 20 dB States
24, 28 dB States
All Attenuation States
0.75 - 1.4 GHz
0.75 - 1.4 GHz
1.40 - 2.0 GHz
0.3 + 3% of Atten. Setting Max
0.4 + 6% of Atten. Setting Max
0.3 + 3% of Atten. Setting Max
dB
dB
dB
Input Power for 0.1 dB Compression
5V
3V
0.75 - 2.0 GHz
20
19
dBm
dBm
Input Third Order Intercept
(Two-Tone Input Power = 0 dBm Each)
5V
3V
0.75 - 2.0 GHz
46
45
dBm
dBm
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
0.75 - 2.0 GHz
560
600
ns
ns
MICROWAVE CORPORATION
9 - 9
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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-35
-30
-25
-20
-15
-10
-5
0
0.75
1
1.25
1.5
1.75
2
NORMALIZED INSERTION LOSS (dB)
FREQUENCY (GHz)
16 dB
8 dB
4 dB
28 dB
-3
-2.5
-2
-1.5
-1
-0.5
0
0.75
1
1.25
1.5
1.75
2
INSERTION LOSS (dB)
FREQUENCY (GHz)
+85 C
-40 C
+25 C
HMC230MS8
v01.0701
Bit Error vs. Attenuation State
Normalized Attenuation
(Only Major States are Shown)
Insertion Loss
Return Loss RF1, RF2
(Only Major States are Shown)
-2
-1
0
1
2
3
4
8
12
16
20
24
28
BIT ERROR (dB)
ATTENUATION STATE (dB)
1.9 GHz
0.9 GHz
-25
-20
-15
-10
-5
0
0.75
1
1.25
1.5
1.75
2
RETURN LOSS (dB)
FREQUENCY (GHz)
16, 28 dB
8 dB
4 dB
4 dB LSB GaAs IC 3-BIT DIGITAL
ATTENUATOR, 0.75 - 2.0 GHz
Note: All Data Typical Over Voltage (+3V to +5V) & Temperature (-40 to +85 deg C).
-4
-3
-2
-1
0
1
2
3
4
0.75
1
1.25
1.5
1.75
2
BIT ERROR (dB)
FREQUENCY (GHz)
16 dB
8 dB
4 dB
28 dB
-60
-40
-20
0
20
40
60
0.75
1
1.25
1.5
1.75
2
RELATIVE PHASE (deg.)
FREQUENCY (GHz)
16 dB
8 dB
4 dB
28 dB
Bit Error vs. Frequency
(Only Major States are Shown)
Relative Phase vs. Frequency
(Only Major States are Shown)
MICROWAVE CORPORATION
9 - 10
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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9
4 dB LSB GaAs IC 3-BIT DIGITAL
ATTENUATOR, 0.75 - 2.0 GHz
v01.0701
HMC230MS8
Control & Bias Voltages
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 1 or PIN 5.
Truth Table
Control Voltage Input
Attenuation Setting
RF1 - RF2
V1
16 dB
V2
4 dB
V3
8 dB
High
High
High
Reference I.L.
High
Low
High
4 dB
High
High
Low
8 dB
Low
High
High
16 dB
Low
Low
Low
28 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 +0.2Vdc @ 20 uA Max
High
Vdd 0.2V @ 50 uA Typ
Note: Vdd = +3V to +5V 0.2V
MICROWAVE CORPORATION
9 - 11
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
A
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T
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9
4 dB LSB GaAs IC 3-BIT DIGITAL
ATTENUATOR, 0.75 - 2.0 GHz
v01.0701
HMC230MS8
Outline Drawing
Absolute Maximum Ratings
Control Voltage (V1, V2, V3)
Vdd to +0.5 Vdc
Bias Voltage (Vdd)
+8.0 Vdc
Storage Temperature
-65 to +150 C
Operating Temperature
-40 to +85 C
RF Input Power (0.75 - 2 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 MUST BE SOLDERED TO PCB RF GROUND.
MICROWAVE CORPORATION
9 - 12
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
A
TTENU
A
T
ORS - SMT
9
4 dB LSB GaAs IC 3-BIT DIGITAL
ATTENUATOR, 0.75 - 2.0 GHz
v01.0701
HMC230MS8
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 as shown is available from Hittite Microwave Corporation upon request.
List of Material
*R2 = R3 = R4 = 100 Ohm.
These Resistors are optional and may
be used to enhance decoupling of the
RF path from the control inputs.
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
HMC230MS8 Digital Attenuator
PCB*
103153 Evaluation PCB 1.25" x 1.5"
*Circuit Board Material: Rogers 4350
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