HMC274QS16
/
274QS16E
v01.0505
1 dB LSB GaAs IC 5-BIT DIGITAL
ATTENUATOR, 0.7 - 2.7 GHz
5
ATTENUATORS - SMT
Typical Applications
The HMC274QS16 / HMC274QS16E is ideal for:
• Cellular/PCS/3G Infrastructure
• 2.4 GHz ISM Radios
• Wireless Data
Features
1 dB LSB Steps to 31 dB
Single Positive Control (+3 to +5V) Per Bit
±0.5 dB Typical Bit Error
Small QSOP16 Plastic Package
Included in the HMC-DK004 Designer’s Kit
Functional Diagram
General Description
The HMC274QS16 & HMC274QS16E are broadband
5-bit positive control GaAs IC digital attenuators in
16 lead QSOP plastic packages. Covering 0.7 to 2.7
GHz the insertion loss is typically less than 2.3 dB.
The attenuator bit values are 1 (LSB), 2, 4, 8, and
16 dB for a total attenuation of 31 dB. Accuracy
is excellent at ± 0.5 dB typical with an IIP3 of up to
+50 dBm. Five bit control voltage inputs, toggled
between 0 and +3 to +5 volts, are used to select
each attenuation state. A single Vdd bias of +3 to +5
volts applied through an external 5K Ohm resistor is
required.
Electrical Specifi cations,
T
A
= +25° C, Vdd = +3V to +5V & Vctl = 0/Vdd
Parameter
Insertion Loss
Attenuation Range
Return Loss (RF1 & RF2, All Atten. States)
Attenuation Accuracy: (Referenced to Insertion Loss)
All Attenuation States
All Attenuation States
All Attenuation 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)
0.7 - 2.7 GHz
560
600
ns
ns
Vdd = 5V
Vdd = 3V
Vdd = 5V
Vdd = 3V
0.7 - 1.4 GHz
1.4 - 2.3 GHz
2.3 - 2.7 GHz
0.7 - 2.7 GHz
0.7 - 2.7 GHz
± 0.35 + 5% of Atten. Setting Max
± 0.25 + 3% of Atten. Setting Max
± 0.30 + 5% of Atten. Setting Max
29
20
54
52
dB
dB
dB
dBm
dBm
dBm
dBm
Frequency
0.7 - 1.4 GHz
1.4 - 2.3 GHz
2.3 - 2.7 GHz
0.7 - 2.7 GHz
0.7 - 1.4 GHz
1.4 - 2.7 GHz
10
12
Min.
Typical
2.0
2.3
2.5
31
15
17
Max.
2.4
2.7
3.1
Units
dB
dB
dB
dB
dB
dB
5 - 28
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
HMC274QS16
/
274QS16E
v01.0505
1 dB LSB GaAs IC 5-BIT DIGITAL
ATTENUATOR, 0.7 - 2.7 GHz
Return Loss RF1, RF2
Insertion Loss
0
(Only Major States are Shown)
0
-5
RETURN LOSS (dB)
-10
-15
-20
-25
-30
0.5
I.L.
1 dB
2 dB
4 dB
8 dB
16 dB
31 dB
5
ATTENUATORS - SMT
5 - 29
INSERTION LOSS (dB)
-1
-2
-3
+25 C
+85 C
-40 C
-4
-5
0.5
1
1.5
2
2.5
3
1
1.5
2
2.5
3
FREQUENCY (GHz)
FREQUENCY (GHz)
Normalized Attenuation
(Only Major States are Shown)
0
NORMALIZED ATTENUATION (dB)
-5
-10
-15
-20
-25
-30
-35
0.5
Bit Error vs. Attenuation State
1.5
1
BIT ERROR (dB)
0.5
0
-0.5
-1
-1.5
0.9 GHz
1.9 GHz
2.4 GHz
1
1.5
2
2.5
3
0
4
8
12
16
20
24
28
32
FREQUENCY (GHz)
ATTENUATION STATE (dB)
Bit Error vs. Frequency
(Only Major States are Shown)
2
Relative Phase vs. Frequency
(Only Major States are Shown)
150
1
BIT ERROR (dB)
RELATIVE PHASE (deg)
100
50
1 dB
2 dB
4 dB
8 dB
16 dB
31 dB
0
1 dB
2 dB
4 dB
8 dB
16 dB
31 dB
0
-1
-50
-2
0.5
1
1.5
2
2.5
3
-100
0.5
1
1.5
2
2.5
3
FREQUENCY (GHz)
FREQUENCY (GHz)
Note: All Data Typical Over Voltage (+3V to +5V).
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
HMC274QS16
/
274QS16E
v01.0505
1 dB LSB GaAs IC 5-BIT DIGITAL
ATTENUATOR, 0.7 - 2.7 GHz
5
ATTENUATORS - SMT
Compression Point & IP3
Attenuation
State (dB)
1
2
4
1
2
4
Control
Voltage (V)
5
5
5
3
3
3
Input P1dB (dBm)
+25C
32.3
32.3
32.8
24.8
24.7
26.0
+85C
31.8
31.8
32.1
25.7
24.1
25.6
-40C
32.9
32.8
33.3
25.2
25.1
26.6
+25C
29.4
29.2
29.4
19.7
19.7
19.6
Input P0.1dB (dBm)
+85C
28.8
28.6
28.7
18.6
18.3
18.6
-40C
29.8
29.4
29.3
21.1
21.0
21.1
+25C
54.7
52.2
54.1
52.2
52.2
53.1
Input IP3 (dBm)
+85C
49.1
49.1
48.65
48.1
48.1
47.65
-40C
52.2
52.2
52.7
52.5
52.2
53.2
Application Circuit
DC blocking capacitors C1 & C2 are
required on RF1 & RF2. Choose C1 = C2
= 100 ~ 300 pF 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 9
or PIN 16.
Truth Table
Control Voltage Input
V1
16 dB
High
High
High
High
High
Low
Low
V2
8 dB
High
High
High
High
Low
High
Low
V3
4 dB
High
High
High
Low
High
High
Low
V4
2 dB
High
High
Low
High
High
High
Low
V5
1 dB
High
Low
High
High
High
High
Low
Attenuation
Setting
RF1 - RF2
Reference I.L.
1 dB
2 dB
4 dB
8 dB
16 dB
31 dB Max. Atten.
Any combination of the above states will provide an attenuation approximately equal to the sum of the bits selected.
5 - 30
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
HMC274QS16
/
274QS16E
v01.0505
1 dB LSB GaAs IC 5-BIT DIGITAL
ATTENUATOR, 0.7 - 2.7 GHz
Control Voltages
State
Low
High
Bias Condition
0 to +0.2 V @ 20 uA Max
Vdd ± 0.2V @ 100 uA Max
Absolute Maximum Ratings
Control Voltage (V1 - V5)
Bias Voltage (Vdd)
Storage Temperature
Operating Temperature
RF Input Power (0.7 - 2.7 GHz)
Vdd + 0.5 Vdc
+8.0 Vdc
-65 to +150 °C
-40 to +85 °C
5
ATTENUATORS - SMT
HMC274
XXXX
HMC274
XXXX
Note: Vdd = +3V to 5V ± 0.2V
+30 dBm
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Outline Drawing
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.
Package Information
Part Number
HMC274QS16
HMC274QS16E
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]
[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
5 - 31
HMC274QS16
/
274QS16E
v01.0505
1 dB LSB GaAs IC 5-BIT DIGITAL
ATTENUATOR, 0.7 - 2.7 GHz
5
ATTENUATORS - SMT
Pin Descriptions
Pin Number
Function
Description
Interface Schematic
1, 2, 8, 10 - 15
GND
This pin must be DC grounded.
3-7
V1 - V5
See truth table and control voltage table.
9
RF1
This pin is DC coupled and matched to 50 Ohm.
Blocking capacitors are required.
16
RF1
This pin is DC coupled and matched to 50 Ohm.
Blocking capacitors are required.
5 - 32
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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