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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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HMC307QS16G
1dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, DC - 4 GHz
v06.0503
General Description
Features
Functional Diagram
1 dB LSB Steps to 31 dB
Single Control Line Per Bit
+/- 0.5 dB Typical Bit Error
Miniature QSOP-16 Package: 29.4 mm
2
Electrical Specifi cations,
T
A
= +25 C, Vee = -5V & VCTL= 0/Vee
Typical Applications
The HMC307QS16G is a broadband 5-bit GaAs IC
digital attenuator in a 16 lead QSOP grounded base
surface mount plastic package. Covering DC to 4
GHz, the insertion loss is less then 2 dB typical. The
attenuator bit values are 1 (LSB), 2, 4, 8, and 16 dB
for a total attenuation of 31 dB. Attenuation accu-
racy is excellent at 0.5 dB typical with an IIP3 of up
to +44 dBm. Five bit control voltage inputs, toggled
between 0 and -5V, are used to select each attenua-
tion state at less than 50 uA each. A single Vee bias
of -5V allows operation down to DC. This product is
an excellent alternative to the HMC235QS16G.
The HMC307QS16G is ideal for:
Cellular
PCS, ISM, MMDS
Wireless Local Loop
Parameter
Frequency
Min.
Typical
Max.
Units
Insertion Loss
DC - 1.4 GHz
1.4 - 2.3 GHz
2.3 - 2.7 GHz
2.7 - 4.0 GHz
1.8
1.9
2.0
2.1
2.2
2.4
2.5
2.7
dB
dB
dB
dB
Attenuation Range
DC - 4.0 GHz
31
dB
Return Loss (RF1 & RF2, All Atten. States)
DC - 1.4 GHz
1.4 - 2.3 GHz
2.3 - 2.7 GHz
2.7 - 4.0 GHz
11
11
10
8
15
17
18
15
dB
dB
dB
dB
Attenuation Accuracy: (Referenced to Insertion Loss)
1 - 20 dB States
21 - 31 dB States
1 - 15 dB States
16 - 31 dB States
DC - 2.7 GHz
DC - 2.7 GHz
2.7 - 4.0 GHz
2.7 - 4.0 GHz
0.2 + 3% of Atten. Setting Max
0.3 + 5% of Atten. Setting Max
0.3 + 5% of Atten. Setting Max
0.6 + 10% of Atten. Setting Max
dB
dB
dB
dB
Input Power for 0.1 dB Compression
0.5 - 4.0 GHz
24
dBm
Input Third Order Intercept Point
(Two-tone Input Power = 0 dBm Each Tone)
0.5 - 4.0 GHz
44
dBm
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
DC - 4.0 GHz
140
160
ns
ns
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Order Online at www.hittite.com
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-4
-3.5
-3
-2.5
-2
-1.5
-1
-0.5
0
0
0.5
1
1.5
2
2.5
3
3.5
4
INSERTION LOSS (dB)
FREQUENCY (GHz)
+85 C
-40 C
+25 C
-40
-35
-30
-25
-20
-15
-10
-5
0
0
0.5
1
1.5
2
2.5
3
3.5
4
RETURN LOSS (dB)
FREQUENCY (GHz)
16 dB
8 dB
2, 4 dB
31 dB
1 dB
-35
-30
-25
-20
-15
-10
-5
0
0
0.5
1
1.5
2
2.5
3
3.5
4
NORMALIZED ATTENUATION (dB)
FREQUENCY (GHz)
31 dB
8 dB
4 dB
2 dB
1 dB
16 dB
0
0.5
1
1.5
2
1
4
7
10
13
16
19
22
25
28
31
BIT ERROR (dB)
ATTENUATION STATE (dB)
1.9 GHz
2.4 GHz
0.9 GHz
0.1 GHz
3.5 GHz
0
0.5
1
1.5
2
0
0.5
1
1.5
2
2.5
3
3.5
4
BIT ERROR (dB)
FREQUENCY (GHz)
16 dB
8 dB
31 dB
1, 2 & 4 dB
-20
0
20
40
60
80
100
0
0.5
1
1.5
2
2.5
3
3.5
4
RELATIVE PHASE (deg.)
FREQUENCY (GHz)
31 dB
8 dB
4 dB
16 dB
1, 2 dB
GaAs MMIC SUB-HARMONICALLY PUMPED MIXER 17 - 25 GHz
HMC307QS16G
Return Loss RF1, RF2
(Only Major States are Shown)
Absolute Bit Error
vs. Attenuation State
1 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, DC - 4 GHz
v06.0503
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)
MICROWAVE CORPORATION
9 - 52
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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ORS - SMT
9
HMC307QS16G
1 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, DC - 4 GHz
v06.0503
Application Circuit
Truth Table
Control Voltage
DC Blocking Capacitors C1 & C2 are
required on RF1 & RF2. Choose C1 = C2 =
100 pF ~ 0.1 uF 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 11
or Pin 14.
Bias Voltage & Current
Suggested Driver Circuit
(One Circuit Required Per Bit Control Input)
Simple driver using inexpensive standard logic ICs provides fast switching using minimum DC current. * Recommended value
to suppress unwanted RF signals at V1 - V5 control lines.
Control Voltage Input
Attenuation
State
RF1 - RF2
V1
16 dB
V2
8 dB
V3
4 dB
V4
2 dB
V5
1 dB
Low
Low
Low
Low
Low
Reference I.L.
Low
Low
Low
Low
High
1 dB
Low
Low
Low
High
Low
2 dB
Low
Low
High
Low
Low
4 dB
Low
High
Low
Low
Low
8 dB
High
Low
Low
Low
Low
16 dB
High
High
High
High
High
31 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 -3V @ 70 uA Typ.
High
Vee + 0.8V @ 5 uA Typ.
Note: Vee = -5V
10%
Vee Range = -5.0 Vdc
10%
Vee
(VDC)
lee (Typ.)
(mA)
lee (Max.)
(mA)
-5.0
3
6
MICROWAVE CORPORATION
9 - 53
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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ORS - SMT
9
HMC307QS16G
1 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, DC - 4 GHz
v06.0503
Outline Drawing
Absolute Maximum Ratings
Control Voltage (V1 - V5)
Vee - 0.5 Vdc
Bias Voltage (Vee)
-7.0 Vdc
Storage Temperature
-65 to +150 C
Operating Temperature
-40 to +85 C
RF Input Power (0.5 - 4 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 AND GROUND PADDLE MUST BE SOLDERED
TO PCB RF GROUND.
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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9
HMC307QS16G
1 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, DC - 4 GHz
v06.0503
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 and exposed paddle 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 Material
* R2 - R6 = 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 - J9
DC Pin
R1
5k Ohm Resistor, 0402 Pkg.
R2 - R6
100 Ohm Resistor, 0402 Pkg.
C1, C2
0402 Chip Capacitor, Select Value for Lowest Frequency of Operation
U1
HMC307QS16G Digital Attenuator
PCB*
103395 Evaluation PCB 1.5" x 1.5"
*Circuit Board Material: Rogers 4350
MICROWAVE CORPORATION
9 - 55
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
HMC307QS16G
1 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, DC - 4 GHz
v06.0503
Notes:
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