HMC680LP4_10 Datasheet, PDF (6/8 Pages) Hittite Microwave Corporation – BiCMOS MMIC 5-BIT DIGITAL VARIABLE GAIN AMPLIFIER, 30 - 400 MHz

HMC680LP4 / 680LP4E
v03.0609
BiCMOS MMIC 5-BIT DIGITAL
VARIABLE GAIN AMPLIFIER, 30 - 400 MHz
Pin Descriptions
Pin Number
Function
1
IBIAS
2, 5, 6,
Package Bottom
N/C, GND
Description
Bias current to amplifier. External inductors
required.
These pins and package bottom must
be connected to RF/DC ground.
Interface Schematic
3
ISET
External bias resistor to adjust the current of the
amplifier.
12
4, 18
9, 10, 11,
12, 13
7, 8
20, 24
21, 23
22
14
Vdd
B4 - B0
RFOUTP,
RFOUTN
AMPINN,
AMPINP
FB2,
FB1
LE
RFIN
Power Supply
Control inputs to digital attenuator.
See Truth Table & Control Voltage Table.
Balanced amplifier outputs.
External components required
Balanced Amplifier inputs.
External components required.
Feedback capacitance for the amplifier.
Common mode emitter inductor.
The LE Pin requires high quality (less than
200mOhms resistance) inductor to ground.
An inductance of 100nH is recommended.
RF input to digital attenuator.
DC blocking capacitor required.
15, 16, 17
FC3 - FC1
External capacitors to ground are required.
Place these capacitors close to the package.
19
ATTNOUT
RF output to digital attenuator.
DC blocking capacitor required.
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: [phone] Fax: [phone] Order On-line at www.hittite.com
Application Support: Phone: [phone] or [e-mail]
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