v00.1002
MICROWAVE CORPORATION
HMC274QS16
1 dB LSB GaAs IC 5-BIT DIGITAL
ATTENUATOR, 0.7 - 2.7 GHz
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
Typical Applications
The HMC274QS16 is ideal for:
9
ATTENUATORS - SMT
鈥?Cellular/PCS/3G Infrastructure
鈥?2.4 GHz ISM Radios
鈥?Wireless Data
Functional Diagram
General Description
The HMC274QS16 is a broadband 5-bit positive
control GaAs IC digital attenuator in a 16 lead QSOP
plastic package. Covering 0.7 to 2.7 GHz the inser-
tion 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 鹵 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 Speci鏗乧ations,
T
A
= +25擄 C, Vdd = +3V to +5V & Vctl = 0/Vdd
Parameter
Insertion Loss
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
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
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
鹵 0.35 + 5% of Atten. Setting Max
鹵 0.25 + 3% of Atten. Setting Max
鹵 0.30 + 5% of Atten. Setting Max
29
20
54
52
dB
dB
dB
dBm
dBm
dBm
dBm
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
0.7 - 2.7 GHz
560
600
ns
ns
9 - 20
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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