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TRF3705
www.ti.com
SLWS223A – AUGUST 2011 – REVISED OCTOBER 2011
300-MHz to 4-GHz Quadrature Modulator
Check for Samples: TRF3705
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FEATURES
DESCRIPTION
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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
Fast Power-Up/Power-Down
The TRF3705 is a low-noise direct quadrature
modulator, capable of converting complex modulated
signals from baseband or IF directly up to RF. The
TRF3705 is a high-performance, superior-linearity
device that is ideal to up-convert to RF frequencies of
300 MHz (1) 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 TRF3705
requires a 0.25-V common-mode voltage for optimum
linearity performance. The TRF3705 also provides a
fast power-down pin that can be used to reduce
APPLICATIONS
power dissipation in TDD applications.
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Cellular Base Station Transmitter
CDMA: IS95, UMTS, CDMA2000, TD-SCDMA
LTE (Long Term Evolution)
TDMA: GSM, EDGE/UWC-136
The TRF3705 is available in an RGE-24 VQFN
package.
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Multicarrier GSM (MC-GSM)
Wireless MAN Wideband Transceivers
(1)
Appropriate matching network is required for optimal
performance at 300 MHz.
PD
GND
LOP
LOM
GND
GC
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4
5
6
0/90
S
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VCC
GND
RF OUT
GND
GND
GND
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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PowerPAD is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright ? 2011, Texas Instruments Incorporated
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