SKY12322-86LF Datasheet, PDF (1/6 Pages) Skyworks Solutions Inc. – GaAs Digital Attenuator 500 MHz-4 GHz 5 Bits, 0.5 dB LSB

DATA SHEET
SKY12322-86LF: GaAs Digital Attenuator
500 MHz–4 GHz 5 Bits, 0.5 dB LSB
Features
● _{Broadband: 500 MHz–4 GHz}
● _{Single positive control voltage: 2.7–5.5 V}
● _{Low current consumption: <100 µA @ 3 V}
● _{Small MSOP-10 package}
● _{Least significant bit attenuation: 0.5 dB}
● _{Attenuation range: 15.5 dB}
● _{High Input IP3: 45 dBm}
● _{Available lead (Pb)-free and RoHS-compliant MSL-1 @ 260 °C}
per JEDEC J-STD-020
Applications
● _{Transceiver transmit automatic level control or receive}
automatic gain control in GSM, CDMA, WCDMA, WLAN,
Bluetooth^®, Zigbee^®, land mobile radio base stations or
terminal equipment
● _{General-purpose signal attenuation in telecommunications and}
instrumentation applications
Functional Block Diagram
RF Input/Output
V1
0.5 dB
1 dB
V2
V3
2 dB
V4
4 dB
V5
8 dB
RF Input/Output
Description
The SKY12322-86LF is a monolithic GaAs, binary-weighted, 5-bit,
single-positive-control voltage digital attenuator which operates
from 500 MHz to 4 GHz. The attenuator has a least significant bit
(LSB) of 0.5 dB and total attenuation of 15.5 dB. The two RF ports
are bilateral; each can be used as the RF input or the RF output.
This attenuator requires an external supply voltage of 2.7–5.5 V.
The SKY12322-86LF is comprised of 5 fixed attenuators in cas-
cade, each of which having a shunt bypass switch. Beginning at
the LSB, which is 0.5 dB, each succeeding fixed attenuator pro-
duces twice the attenuation of the preceding stage. The state of
each bypass switch is controlled by the logic level voltage applied
to the associated control voltage input; a logic high voltage closes
the associated switch, thereby bypassing that fixed attenuator
stage, and a logic low opens the switch to force the input signal to
that stage through the associated attenuator.
DC power consumption is very low, 100 µA maximum with control
voltage and supply voltage of 3 V. The switch can operate over the
temperature range of -40 °C to +85 °C.
An evaluation board is available upon request.
NEW Skyworks offers lead (Pb)-free, RoHS (Restriction of
Hazardous Substances)-compliant packaging.
BUY ^{Innovation to GoTM}
NOW _{Now available for purchase online.}
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
200273 Rev. B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 31, 2006
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