HMC681LP5 Datasheet, PDF (8/10 Pages) Hittite Microwave Corporation – 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL VARIABLE GAIN AMPLIFIER w/ SERIAL CONTROL, DC - 1 GHz

HMC681LP5 / 681LP5E
v03.1010
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL VARIABLE
GAIN AMPLIFIER w/ SERIAL CONTROL, DC - 1 GHz
Pin Descriptions
Pin Number
Function
1, 5, 9, 14,
16, 23, 28
N/C
2, 20
RFin1,RFin2
Description
The pins are not connected internally; however, all data shown
herein was measured with these pins connected to RF/DC
ground externally.
This pin is DC coupled. An off chip DC blocking capacitor is
required.
Interface Schematic
4, 22
RFout1, RFout2
RF output and DC bias (Vcc) for the output stage of the
amplifiers. Amplifier bias provided via external bias tee as
shown in application circuit.
3, 7, 18, 21
6, 19
8, 10,
11, 12,
13, 15,
17
24
25, 26
30
31
32
29
GND
ATTin, ATTout
These pins and package bottom
must be connected to RF/DC ground.
These pins are DC coupled and matched to 50 Ohms.
Blocking capacitors are required. Select value based
on lowest frequency of operation.
ACG1, ACG2,
ACG3, ACG4,
ACG5, ACG6, ACG7
External capacitors to ground is required. Select value for
lowest frequency of operation. Place capacitor as close to
pins as possible.
SEROUT
Serial input data delayed by 6 clock cycles.
PUP2, PUP1
CLK
SERIN
Refer to truth tables and serial control interface diagram.
LE
P/S
Apply +5V for normal operation.
12
27
Vdd
Supply voltage
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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