1 Features

1• High Linearity:

– Output IP3: 30 dBm at 1850 MHz

• Low Output Noise Floor: –160 dBm/Hz

• 78-dBc Single-Carrier WCDMA ACPR

at –10-dBm Channel Power

• Unadjusted Carrier Suppression: –40 dBm

• Unadjusted Sideband Suppression: –45 dBc

• Single Supply: 3.3-V Operation

• 1-bit Gain Step Control to•

Fast Power-Up/Power-Down

2 Applications

• Cellular Base Station Transmitter

• CDMA: IS95, UMTS, CDMA2000, TD-SCDMA

• LTE (Long Term Evolution), TD-LTE

• TDMA: GSM, EDGE/UWC-136

• Multicarrier GSM (MC-GSM)

• Wireless MAN Wideband Transceivers

3 Description

The TRF37T05 is a low-noise direct quadrature

modulator with exceptional TDD performance. It is capable of converting complex modulated signals

from baseband or IF directly up to RF. The

TRF37T05 is a high-performance, superior-linearity

device that is ideal to up-convert to RF frequencies of

300 MHz (Note: appropriate matching network is required for optimal performance at 300 MHz)

through 4 GHz. The modulator is implemented as a

double-balanced mixer.

The RF output block consists of a differential-to•

single-ended converter that is capable of driving a

single-ended 50-Ω load. The TRF37T05 requires a

0.25-V common-mode voltage for optimum linearity performance. The TRF37T05 also provides a fast

power-down pin that can be used to reduce power

dissipation while maintaining optimized adjusted

carrier feed-through performance in TDD applications.

The TRF37T05 is available in an RGE-24 VQFN package.