ATTENUATORS - SMT
5
5 - 196
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
0.5 dB LSB GaAs MMIC 5-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, 0.7 - 3.8 GHz
General Description
Features
Functional Diagram
The HMC603QS16 & HMC603QS16E are general
purpose broadband 5-bit positive control GaAs IC
digital attenuators in 16 lead QSOP surface mount
plastic packages. Covering 0.7 to 3.8 GHz, the inser-
tion loss is less than 1.9 dB typical. The attenuator
bit values are 0.5 (LSB), 1, 2, 4 and 8 dB for a total
attenuation of 15.5 dB. Attenuation accuracy is excel-
lent at ± 0.15 dB typical with an IIP3 of +50 dBm.
Five bit control voltage inputs, toggled between 0
and +3 to +5V, are used to select each attenuation
state at less than 1 uA each. A single Vdd bias of
+3 to +5V applied through an external 5K Ohm
resistor is required.
0.5 dB LSB Steps to 15.5 dB
Single Positive Control Per Bit
± 0.15 dB Typical Bit Error
High Input IP3: +50 dBm
QSOP16 SMT Package
Electrical Speci cations,
TA = +25° C, Vdd= +3V to +5V & Vctl= 0/Vdd (Unless Otherwise Stated)
Typical Applications
The HMC603QS16 / HMC603QS16E is ideal for:
• Cellular/3G Infrastructure
• ISM, MMDS
• WLAN, WiMAX, & WiBro
Parameter Frequency (GHz) Min. Typical Max. Units
Insertion Loss
0.7 - 1.4 GHz
1.4 - 2.3 GHz
2.3 - 3.0 GHz
3.0 - 3.8 GHz
1. 3
1. 6
1. 9
2.6
1. 6
1. 9
2.2
3.0
dB
dB
dB
dB
Attenuation Range 15.5 dB
Return Loss (RF1 & RF2, All Atten. States)
0.7 - 1.4 GHz
1.4 - 3.0 GHz
3.0 - 3.8 GHz
18
20
15
dB
dB
dB
Attenuation Accuracy: (Referenced to Insertion Loss)
All States 0.7 -2.2 GHz
2.2 - 3.8 GHz
± (0.2 + 2% of Atten. Setting) Max.
± (0.3 + 3% of Atten. Setting) Max.
dB
dB
Input Power for 0.1 dB Compression Vdd = 5V
Vdd = 3V 0.7 - 3.8 GHz 29
28
dBm
dBm
Input Third Order Intercept Point
(Two-tone Input Power = 0 dBm Each Tone)
REF - 2 dB States
2.5 - 15.5 dB States 0.7 - 3.8 GHz 53
48
dBm
dBm
Switching Characteristics
0.7 - 3.8 GHz 1. 6
1. 6
µs
µs
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
HMC603QS16 / 603QS16E
v01.1006
ATTENUATORS - SMT
5
5 - 197
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
Return Loss RF1, RF2
(Only Major States are Shown)
Bit Error vs. Attenuation State
Insertion Loss
Normalized Attenuation
(Only Major States are Shown)
Bit Error vs. Frequency
(Only Major States are Shown)
Relative Phase vs. Frequency
(Only Major States are Shown)
HMC603QS16 / 603QS16E
v01.1006
-4
-3.5
-3
-2.5
-2
-1.5
-1
-0.5
0
0.5 1 1.5 2 2.5 3 3.5 4
+25 C
+85 C
-40 C
INSERTION LOSS (dB)
FREQUENCY (GHz)
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
0.5 2 3.5 5 6.5 8 9.5 11 12.5 14 15.5
BIT ERROR (dB)
ATTENUATION STATE (dB)
0.9 GHz 1.9 GHz
3.5 GHz2.4 GHz
-40
-20
0
20
40
0.5 1 1.5 2 2.5 3 3.5 4
RELATIVE PHASE (deg)
FREQUENCY (GHz)
0.5, 1, 2 dB
4 dB
8 dB
15.5 dB
-0.6
-0.3
0
0.3
0.6
0.5 1 1.5 2 2.5 3 3.5 4
BIT ERROR (dB)
FREQUENCY (GHz)
15.5 dB 8 dB2 dB
1 dB4 dB 0.5 dB
-18
-16
-14
-12
-10
-8
-6
-4
-2
0
0.5 1 1.5 2 2.5 3 3.5 4
NORMALIZED ATTENUATION (dB)
FREQUENCY (GHz)
-40
-35
-30
-25
-20
-15
-10
-5
0
0.5 1 1.5 2 2.5 3 3.5 4
RETURN LOSS (dB)
FREQUENCY (GHz)
I.L
0.5 dB 1 dB
2 dB 4 dB8 dB 15.5 dB
0.5 dB LSB GaAs MMIC 5-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, 0.7 - 3.8 GHz
ATTENUATORS - SMT
5
5 - 198
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
v01.1006
Application Circuit
Note:
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 9 or Pin 16.
HMC603QS16 / 603QS16E
Truth Table
Control Voltage Input Attenuation
Setting
RF1 - RF2
V1
8 dB
V2
4 dB
V3
2 dB
V4
1 dB
V5
0.5 dB
High High High High High Reference I.L.
High High High High Low 0.5 dB
High High High Low High 1 dB
High High Low High High 2 dB
High Low High High High 4 dB
Low High High High High 8 dB
Low Low Low Low Low 15.5 dB Max.
Atten.
Any combination of the above states will provide an attenuation
approximately equal to the sum of the bits selected.
Worst Case Step Error
-0.6
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
0.6
0.5 1 1.5 2 2.5 3 3.5 4
STEP ERROR (dB)
FREQUENCY (GHz)
Control & Bias Voltages
State Bias Condition
Low 0 to +0.2V @ 1.0 µA Max.
High Vdd ± 0.2V @ 0.5 µA Max.
Note: Vdd = +3V to +5V ± 0.00.20.20.2V
Bias Voltage & Current
Vdd = +5.0 Vdc ± 10%
Vdd
(VDC)
Idd (Typ.)
(µA)
+3.0 4.0
+5.0 5.0
0.5 dB LSB GaAs MMIC 5-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, 0.7 - 3.8 GHz
ATTENUATORS - SMT
5
5 - 199
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
v01.1006
Outline Drawing
Absolute Maximum Ratings
RF Input Power (0.7 - 3.8 GHz) +30 dBm
Control Voltage (V1 - V5) Vdd + 0.5 Vdc
Bias Voltage (Vdd) +8.0 Vdc
Channel Temperature 150 °C
Thermal Resistance 174 °C/W
Storage Temperature -65 to +150 °C
Operating Temperature -40 to +85 °C
ESD Sensitivity (HBM) Class 1A
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
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.
Part Number Package Body Material Lead Finish MSL Rating Package Marking [3]
HMC603QS16 Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 [1] HMC603
XXXX
HMC603QS16E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 [2] HMC603
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
HMC603QS16 / 603QS16E
0.5 dB LSB GaAs MMIC 5-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, 0.7 - 3.8 GHz
ATTENUATORS - SMT
5
5 - 200
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
v01.1006
HMC603QS16 / 603QS16E
Pin Descriptions
Pin Number Function Description Interface Schematic
1, 2, 8, 10 - 15 GND These pins must be DC grounded.
3 - 7 V1 - V5 See truth table and control voltage table.
9RF2
This pin is DC coupled and matched to 50 Ohm.
A blocking capacitor is required.
16 RF1 This pin is DC coupled and matched to 50 Ohm.
A blocking capacitor is required.
0.5 dB LSB GaAs MMIC 5-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, 0.7 - 3.8 GHz
ATTENUATORS - SMT
5
5 - 201
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
v01.1006
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 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
shown is available from Hittite upon request.
List of Materials for Evaluation PCB 104976 [1]
* 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 PCB Mount SMA Connector
J3 - J11 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
U1 HMC603QS16 / HMC603QS16E
Digital Attenuators
PCB [2] 104931 Evaluation PCB
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Rogers 4350
HMC603QS16 / 603QS16E
0.5 dB LSB GaAs MMIC 5-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, 0.7 - 3.8 GHz
