HMC288MS8
/
288MS8E
v01.0705
2 dB LSB GaAs MMIC 3-BIT DIGITAL
ATTENUATOR, 0.7 - 3.7 GHz
Typical Applications
Features
2 dB LSB Steps to 14 dB
Single Positive Control Per BIT
Monotonic: ±03 dB Bit Error Typical
Miniature MSOP-8 Package, 14.8mm
2
6
ATTENUATORS - SMT
The HMC288MS8 / HMC288MS8E is ideal for:
• Cellular
• PCS, ISM, MMDS
• WLL applications
Functional Diagram
General Description
The HMC288MS8 & HMC288MS8E are broadband 3-
bit positive control GaAs IC digital attenuators in 8 lead
MSOP surface mount plastic packages. Covering 0.7 to
3.7 GHz, the insertion loss is typically less than 1.2 to
1.8 dB. The attenuator bit values are 2 (LSB), 4, and 8
dB for a total attenuation of 14 dB. Accuracy is excel-
lent at ± 0.3 dB typical with an IIP3 of up to +51 dBm.
Three bit control voltage inputs, toggled between 0 and
+3 to +5V, are used to select each attenuation state at
less than 50 uA each. A single Vdd bias of +3 to +5V
applied through an external 5K Ohm resistor is required
while occupying less than 14.8 mm2.
Electrical Specifications,
T
A
= +25° C, Vdd = +3V to +5V & Vctl = 0/Vdd (Unless Otherwise Stated)
Parameter
Frequency
0.7 - 1.4 GHz
1.4 - 2.3 GHz
2.3 - 2.7 GHz
2.7 - 3.7 GHz
0.7 - 3.7 GHz
0.7 - 1.4 GHz
1.4 - 2.3 GHz
2.3 - 2.7 GHz
2.7 - 3.7 GHz
14
11
10
9
Min.
Typical
1.0
1.3
1.5
1.7
14
17
15
14
12
Max.
1.4
1.7
2.0
2.3
Units
dB
dB
dB
dB
dB
dB
dB
dB
dB
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
All Attenuation States
Input Power for 0.1 dB Compression
Input Third Order Intercept Point
(Two-tone Input Power = 0dBm Each Tone)
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
0.7 - 3.7 GHz
560
600
ns
ns
5V
3V
5V
3V
0.7 - 1.4 GHz
1.4 - 2.3 GHz
2.3 - 2.7 GHz
2.7 - 3.7 GHz
0.7 - 3.7 GHz
0.7 - 3.7 GHz
± 0.3 + 3% of Atten. Setting Max
± 0.2 + 3% of Atten. Setting Max
± 0.3 + 3% of Atten. Setting Max
± 0.3 + 4% of Atten. Setting Max
25
22
51
47
dB
dB
dB
dB
dBm
dBm
dBm
dBm
6 - 34
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
HITTITE [ HITTITE MICROWAVE CORPORATION ]
