Datasheet Linear Technology LT5568-2 — Datenblatt

LT5568-2
GSM/EDGE Optimized,
High Linearity Direct
Quadrature Modulator
DESCRIPTIO
U FEATURES
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в–  The LTВ®5568-2 is a direct I/Q modulator designed for high
performance wireless applications, including wireless
infrastructure. It allows direct modulation of an RF signal
using differential baseband I and Q signals. It supports
GSM, EDGE, CDMA, CDMA2000 and other systems that
operate in the 850MHz to 965MHz band. It may be configured as an image reject upconverting mixer, by applying
90В° phase-shifted signals to the I and Q inputs. The I/Q
baseband inputs consist of voltage-to-current converters
that in turn drive double-balanced mixers. The outputs of
these mixers are summed and applied to an on-chip RF
transformer, which converts the differential mixer signals …