HMC479ST89 / 479ST89E
v02.0710
SiGe HBT GAIN BLOCK
MMIC AMPLIFIER, DC - 5 GHz
Pin Descriptions
Pin Number
Function
Description
Interface Schematic
8
This pin is DC coupled.
An off chip DC blocking capacitor is required.
1
RFIN
3
RFOUT
GND
RF output and DC Bias (Vcc) for the output stage.
These pins and package bottom must be connected to RF/
DC ground.
2, 4
Application Circuit
Recommended Bias Resistor Values
for Icc= 75 mA, Rbias= (Vs - Vcc) / Icc
Supply Voltage (Vs)
5V
6V
8V
10V
82 Ω
1/2 W
12V
110 Ω
1 W
Note:
1. External blocking capacitors are required on
RFIN and RFOUT.
2. RBIAS provides DC bias stability over temperature.
RBIAS VALUE
13 Ω
1/8 W
27 Ω
1/4 W
51 Ω
1/2 W
RBIAS POWER RATING
Recommended Component Values for Key Application Frequencies
Frequency (MHz)
Component
50
900
1900
18 nH
100 pF
2200
18 nH
100 pF
2400
15 nH
100 pF
3500
8.2 nH
100 pF
5000
6.8 nH
100 pF
L1
270 nH
0.01 μF
56 nH
100 pF
C1, C2
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
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HITTITE [ HITTITE MICROWAVE CORPORATION ]
