HMC478SC70_09 Datasheet, PDF (5/6 Pages) Hittite Microwave Corporation – SiGe HBT GAIN BLOCK MMIC AMPLIFIER, DC - 4 GHz

Pin Descriptions
9
Pin Number
Function
1, 2, 4, 5
GND
3
RFIN
6
RFOUT
v00.0607
HMC478SC70 / 478SC70E
SiGe HBT GAIN BLOCK
MMIC AMPLIFIER, DC - 4 GHz
Description
These pins must be connected to RF/DC ground.
This pin is DC coupled.
An off chip DC blocking capacitor is required.
RF output and DC Bias (Vcc) for the output stage.
Interface Schematic
Application Circuit
Recommended Bias Resistor Values
for Icc= 62 mA, Rbias= (Vs - Vcc) / Icc
Supply Voltage (Vs)
RBIAS VALUE
RBIAS POWER RATING
5V
18 Ω
1/8 W
6V
35 Ω
1/4 W
8V
67 Ω
1/2 W
Note:
1. External blocking capacitors are required on
RFIN and RFOUT.
2. RBIAS provides DC bias stability over temperature.
Recommended Component Values for Key Application Frequencies
Component
L1
C1, C2
50
270 nH
0.01 μF
900
56 nH
100 pF
Frequency (MHz)
1900
2200
18 nH
18 nH
100 pF
100 pF
2400
15 nH
100 pF
3500
8.2 nH
100 pF
9 - 100
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20 Alpha Road, Chelmsford, MA 01824 Phone: [phone] Fax: [phone]
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