HMC307QS16G
/
307QS16GE
v07.0505
1dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, DC - 4 GHz
Typical Applications
Features
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
6
ATTENUATORS - SMT
The HMC307QS16G / HMC307QS16GE is ideal for:
• Cellular
• PCS, ISM, MMDS
• Wireless Local Loop
Functional Diagram
General Description
The HMC307QS16G & HMC307QS16GE are broad-
band 5-bit GaAs IC digital attenuators in 16 lead
QSOP grounded base surface mount plastic pack-
ages. 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 accuracy 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 attenuation 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.
Electrical Specifications,
T
A
= +25° C, Vee = -5V & VCTL= 0/Vee
Parameter
Frequency
DC - 1.4 GHz
1.4 - 2.3 GHz
2.3 - 2.7 GHz
2.7 - 4.0 GHz
DC - 4.0 GHz
DC - 1.4 GHz
1.4 - 2.3 GHz
2.3 - 2.7 GHz
2.7 - 4.0 GHz
DC - 2.7 GHz
DC - 2.7 GHz
2.7 - 4.0 GHz
2.7 - 4.0 GHz
0.5 - 4.0 GHz
0.5 - 4.0 GHz
11
11
10
8
Min.
Typical
1.8
1.9
2.0
2.1
31
15
17
18
15
Max.
2.2
2.4
2.5
2.7
Units
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dBm
dBm
Insertion Loss
Attenuation Range
Return Loss (RF1 & RF2, All Atten. States)
Attenuation Accuracy: (Referenced to Insertion Loss)
1 - 20 dB States
21 - 31 dB States
1 - 15 dB States
16 - 31 dB States
Input Power for 0.1 dB Compression
Input Third Order Intercept Point
(Two-tone Input Power = 0 dBm Each Tone)
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
±
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
24
44
DC - 4.0 GHz
140
160
ns
ns
6 - 66
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
HMC307QS16G
/
307QS16GE
v07.0505
1dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, DC - 4 GHz
Return Loss RF1, RF2
Insertion Loss
0
-0.5
INSERTION LOSS (dB)
(Only Major States are Shown)
0
-5
31 dB
8 dB
16 dB
6
ATTENUATORS - SMT
-1.5
-2
-2.5
-3
-3.5
-4
0
0.5
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
+25
-40
+85
RETURN LOSS (dB)
-1
-10
-15
-20
-25
-30
1 dB
-35
2, 4 dB
-40
0
0.5
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
Normalized Attenuation
(Only Major States are Shown)
0
NORMALIZED ATTENUATION (dB)
-5
Absolute Bit Error
vs. Attenuation State
2
BIT ERROR (dB)
-10
-15
-20
-25
-30
-35
0
0.5
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
1.5
3.5 GHz
2.4 GHz
0.1 GHz
1
1.9 GHz 0.9 GHz
1 dB
2 dB
4 dB
8 dB
16 dB
31 dB
0.5
0
1
4
7
10
13
16
19
22
25
28
31
ATTENUATION STATE (dB)
Absolute Bit Error vs. Frequency
(Only Major States are Shown)
2
Relative Phase vs. Frequency
(Only Major States are Shown)
100
80
60
40
20
0
1, 2 dB
31 dB
1.5
BIT ERROR (dB)
31 dB
1
RELATIVE PHASE (deg.)
16 dB
8 dB
4 dB
0.5
1, 2 & 4 dB
16 dB
8 dB
0
0
0.5
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
-20
0
0.5
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
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
6 - 67
HMC307QS16G
/
307QS16GE
v07.0505
1dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, DC - 4 GHz
Control Voltage
Truth Table
Control Voltage Input
V1
16 dB
Low
Low
Low
V2
8 dB
Low
Low
Low
Low
High
Low
High
V3
4 dB
Low
Low
Low
High
Low
Low
High
V4
2 dB
Low
Low
High
Low
Low
Low
High
V5
1 dB
Low
High
Low
Low
Low
Low
High
Attenuation
State
RF1 - RF2
Reference I.L.
1 dB
2 dB
4 dB
8 dB
16 dB
31 dB
Max. Atten.
6
ATTENUATORS - SMT
State
Low
High
Bias Condition
0 to -3V @ 70 uA Typ.
Vee + 0.8V @ 5 uA Typ.
Note: Vee = -5V
±
10%
Bias Voltage & Current
Vee Range = -5.0 Vdc
±
10%
Vee
(VDC)
-5.0
lee (Typ.)
(mA)
3
lee (Max.)
(mA)
6
Low
Low
High
High
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 pF ~ 0.1 uF to allow lowest
customer specific frequency to pass with
minimal loss. R1= 5K Ohm is required to
supply voltage to the circuit through either
Pin 11 or Pin 14.
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.
6 - 68
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
HMC307QS16G
/
307QS16GE
v07.0505
1dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, DC - 4 GHz
Absolute Maximum Ratings
Control Voltage (V1 - V5)
Bias Voltage (Vee)
Storage Temperature
Operating Temperature
RF Input Power (0.5 - 4 GHz)
Vee - 0.5 Vdc
-7.0 Vdc
-65 to +150 °C
6
ATTENUATORS - SMT
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 AND GROUND PADDLE MUST BE SOLDERED TO
PCB RF GROUND.
-40 to +85 °C
+26 dBm
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Outline Drawing
Package Information
Part Number
HMC307QS16G
HMC307QS16GE
Package Body Material
Low Stress Injection Molded Plastic
RoHS-compliant Low Stress Injection Molded Plastic
Lead Finish
Sn/Pb Solder
100% matte Sn
MSL Rating
MSL1
MSL1
[1]
Package Marking
[3]
HMC307
XXXX
HMC307
XXXX
[2]
[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
6 - 69
HMC307QS16G
/
307QS16GE
v07.0505
1dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, DC - 4 GHz
Evaluation Circuit Board
6
ATTENUATORS - SMT
* R2 - R6 = 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 103397
[1]
Item
J1 - J2
J3 - J9
R1
R2 - R6
C1, C2
U1
PCB
[2]
Description
PCB Mount SMA Connector
DC Pin
5k Ohm Resistor, 0402 Pkg.
100 Ohm Resistor, 0402 Pkg.
0402 Chip Capacitor, Select Value for Lowest
Frequency of Operation
HMC307QS16G / HMC307QS16GE
Digital Attenuator
103395 Evaluation PCB 1.5” x 1.5”
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 and exposed paddle 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 shown is avail-
able from Hittite upon request.
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Rogers 4350
6 - 70
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
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