DATA SHEET
SKY12323-303LF: GaAs Digital Attenuator
500 MHz–3 GHz 5 Bits, 1 dB LSB
Features
Broadband: 500 MHz–3 GHz
●
Attenuation range: 31 dB
●
Least significant bit attenuation: 1 dB
●
Low insertion loss: 1.4 dB @ 900 MHz
●
Single positive control voltage: 2.7–5.5 V
●
Low current consumption: <100 µA @ 3 V
●
Small MSOP-10 package with exposed paddle
●
Available lead (Pb)-free and RoHS-compliant MSL-1 @ 260 °C
per JEDEC J-STD-020
●
Functional Block Diagram
RF Input/Output
V1
V2
V3
V4
1 dB
2 dB
4 dB
8 dB
V5
16 dB
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
●
RF Input/Output
Description
The SKY12323-303LF is a monolithic GaAs, binary-weighted, 5-bit,
single positive control voltage digital attenuator which operates
from 500 MHz–3 GHz. The attenuator has a least significant bit
(LSB) of 1 dB and total attenuation of 31 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 SKY12323-303LF is comprised of five fixed attenuators in cas-
cade, each of which having a shunt bypass switch. Beginning at
the LSB, which is 1 dB, each succeeding fixed attenuator produces
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.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
200273 Rev. C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 7, 2006
1
SKYWORKS [ SKYWORKS SOLUTIONS INC. ]
