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.