Hittite Introduces New Wideband Direct Modulator with Digitally Controlled VGA
Wideband Direct I/Q Modulator Covers 20 MHz to 2800 MHz
MA, 06/28/2010 – Hittite Microwave Corporation, the world class supplier of complete MMIC based solutions for
communication & military markets, has introduced a new Wideband Direct I/Q Modulator with VGA which is ideal for
automotive, broadband, cellular/3G, WiMAX/4G, military and test & measurement equipment applications between 20
and 2800 MHz.
HMC795LP5E is a low noise, high linearity Direct Quadrature Modulator RFIC which is rated from 20 MHz to 2800
MHz with integrated digitally controlled Analog Variable Gain Amplifier (AVGA) with impressive digital control
features that provide up to 32 dB of linear gain control in 0.5 dB steps. This wideband direct modulator exhibits
an output noise floor of -156 dBm/Hz, output P1dB of +11 dBm, output IP3 of +22 dBm, and sideband suppression of
-53 dBc. The RF output port is differential while the LO input operates from drive levels between -9 and +3 dBm,
and can be driven in either differential or single-ended mode.
The outstanding level of integration is
achieved with industry leading LO feedthrough and single sideband rejection, typically better than -50 dBc
uncalibrated over the full 31.5 dB dynamic range at the output while operating at a low 120 mA power consumption.
HMC795LP5E has integrated two of the most important features in a high performance transmitter; a differential
I and Q interface for easy direct upconversion from baseband Digital to Analog Converters (DACs) operating at up
to 400MHz, plus a wide range of RF amplitude control to allow optimization of the drive level to follow on driver
HMC795LP5E AVGA offers flexible control options including serial port or parallel port interfaces featuring a
built in 11 bit DAC with linearization to allow 31.5 dB output power control with 0.5 dB steps from either control
port. More demanding applications can access the 11 bit DAC directly via the serial port and achieve 0.1 dB steps
over a 20 dB dynamic range.
HMC795LP5E Direct Quadrature Modulator is housed in a compact 5 x 5 mm SMT QFN package. This high linearity
direct modulator can be used to create virtually any analog or digital modulation format including BPSK, QPSK,
8PSK, OFDM, and QAM for basestation, access point, and customer premise equipment. The HMC795LP5E is ideal for
software defined radio and multi-band transmitters, where the upconverter must dynamically alter its modulation
format and/or output frequency, depending on local operating conditions.
This RFIC requires minimal
external components & provides a low cost alternative to more complicated double upconversion architectures. br>
Samples and evaluation PC boards for all SMT packaged products are available from stock and can be ordered via the
company's e-commerce site or via direct purchase order.
Hittite Microwave Corporation is an innovative designer and manufacturer of analog, digital and mixed-signal ICs,
modules, subsystems and instrumentation for digital, RF, microwave and millimeterwave applications covering DC to
110 GHz. Our Digital/RFIC/MMIC products are developed using state-of-the-art GaAs, GaN, InGaP/GaAs, InP, SOI,
SiGe, CMOS and BiCMOS semiconductor processes utilizing MESFET, HEMT, pHEMT, mHEMT, HBT and PIN devices. Our
custom and standard products support a wide range of wireless / wired communications and radar applications for
Automotive, Broadband, Cellular/4G, Fiber Optics, Microwave & Millimeterwave Communications, Military, Test &
Measurement, and Space markets.