HMC274QS16
/
274QS16E
v01.0505
1 dB LSB GaAs IC 5-BIT DIGITAL
ATTENUATOR, 0.7 - 2.7 GHz
Designer鈥檚 Kit
Available
Typical Applications
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鈥檚 Kit
6
ATTENUATORS - SMT
The HMC274QS16 / HMC274QS16E is ideal for:
鈥?Cellular/PCS/3G Infrastructure
鈥?2.4 GHz ISM Radios
鈥?Wireless Data
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 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 Specifications,
T
A
= +25擄 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
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
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
6 - 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
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