鈥?/div>
Test Equipment
Functional Diagram
General Description
The HMC468LP3 is a broadband 3-bit GaAs IC
digital attenuator in a low cost leadless surface
mount package. Covering DC to 6.0 GHz, the
insertion loss is less than 1 dB typical up to 4
GHz. The attenuator bit values are 1 (LSB), 2 and
4 dB for a total attenuation of 7 dB. Attenuation
accuracy is excellent at 鹵 0.4 dB typical step error
with an IIP3 of +50 dBm. Three control voltage
inputs, toggled between 0 and +5V, are used to
select each attenuation state. A single Vdd bias
of +5V is required.
Electrical Speci鏗乧ations,
T
A
= +25擄 C, With Vdd = +5V & Vctl = 0/+5V
Parameter
Frequency
(GHz)
DC - 2.5 GHz
2.5 - 4.5 GHz
4.5 - 6.0 GHz
DC - 6.0 GHz
DC - 4.0 GHz
4.0 - 6.0 GHz
All States
1 - 4 dB States
5 - 7 dB States
DC - 2.5 GHz
2.5 - 6.0 GHz
2.5 - 6.0 GHz
0.25 - 6.0 GHz
0.25 - 6.0 GHz
DC - 6.0 GHz
110
135
ns
ns
Min.
Typ.
0.7
0.9
1.3
7
20
15
鹵 0.2 + 2% of Atten. Setting Max.
鹵 0.3 + 3% of Atten. Setting Max.
鹵 0.4 + 4% of Atten. Setting Max.
20
50
Max.
1.0
1.3
1.8
Units
dB
dB
dB
dB
dB
dB
dB
dB
dB
dBm
dBm
Insertion Loss
Attenuation Range
Return Loss (RF1 & RF2, All Atten. States)
Attenuation Accuracy:
(Referenced to Insertion Loss)
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)
* Bypass capacitor connecting ACG1, ACG2 & ACG3 to RF ground required per pin description herein.
9 - 104
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