ATTENUATORS - SMT
5
5 - 8
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
HMC230MS8 / 230MS8E
4 dB LSB GaAs MMIC 3-BIT DIGITAL
ATTENUATOR, 0.75 - 2.0 GHz
v02.0505
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 Speci cations,
TA = +25° C, Vdd = +3V to +5V & Vctl = 0/Vdd (Unless Otherwise Stated)
Typical Applications
The HMC230MS8 & HMC230MS8E are broadband 3
- bit positive control GaAs IC digital attenuators in 8
lead MSOP surface mount plastic packages. Cover-
ing 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 / HMC230MS8E 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
ATTENUATORS - SMT
5
5 - 9
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
HMC230MS8 / 230MS8E
v02.0505
Bit Error vs. Attenuation State
Normalized Attenuation
(Only Major States are Shown)
Insertion Loss
Return Loss RF1, RF2
(Only Major States are Shown)
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).
Bit Error vs. Frequency
(Only Major States are Shown)
Relative Phase vs. Frequency
(Only Major States are Shown)
-3
-2.5
-2
-1.5
-1
-0.5
0
0.75 1 1.25 1.5 1.75 2
+25C
-40C
+85C
INSERTION LOSS (dB)
FREQUENCY (GHz)
-2
-1
0
1
2
3
4 8 12 16 20 24 28
0.9 GHz
1.9 GHz
BIT ERROR (dB)
ATTENUATION STATE (dB)
-35
-30
-25
-20
-15
-10
-5
0
0.75 1 1.25 1.5 1.75 2
4 dB
8 dB
16 dB
28 dB
NORMALIZED INSERTION LOSS (dB)
FREQUENCY (GHz)
-60
-40
-20
0
20
40
60
0.75 1 1.25 1.5 1.75 2
4 dB
8 dB
16 dB
28 dB
RELATIVE PHASE (deg.)
FREQUENCY (GHz)
-4
-3
-2
-1
0
1
2
3
4
0.75 1 1.25 1.5 1.75 2
4 dB
8 dB
16 dB
28 dB
BIT ERROR (dB)
FREQUENCY (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
ATTENUATORS - SMT
5
5 - 10
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
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 speci 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
HMC230MS8 / 230MS8E
v02.0505 4 dB LSB GaAs IC 3-BIT DIGITAL
ATTENUATOR, 0.75 - 2.0 GHz
ATTENUATORS - SMT
5
5 - 11
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, 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
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Part Number Package Body Material Lead Finish MSL Rating Package Marking [3]
HMC230MS8 Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 [1] H230
XXXX
HMC230MS8E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 [2] H230
XXXX
[1] Max peak re ow temperature of 235 °C
[2] Max peak re ow temperature of 260 °C
[3] 4-Digit lot number XXXX
Package Information
HMC230MS8 / 230MS8E
v02.0505 4 dB LSB GaAs IC 3-BIT DIGITAL
ATTENUATOR, 0.75 - 2.0 GHz
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.
ATTENUATORS - SMT
5
5 - 12
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 nal 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.
List of Materials for Evaluation PCB 103155 [1]
*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 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 HMC230MS8 / HMC230MS8E Digital Attenuator
PCB [2] 103153 Evaluation PCB 1.25” x 1.5”
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Rogers 4350
HMC230MS8 / 230MS8E
v02.0505 4 dB LSB GaAs IC 3-BIT DIGITAL
ATTENUATOR, 0.75 - 2.0 GHz
ATTENUATORS - SMT
5
5 - 13
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
Notes:
HMC230MS8 / 230MS8E
v02.0505 4 dB LSB GaAs IC 3-BIT DIGITAL
ATTENUATOR, 0.75 - 2.0 GHz
