LT5546

PRODUCTION

40MHz to 500MHz VGA and I/Q Demodulator with 17MHz Baseband Bandwidth

Part Models: 2
1ku List Price: Starting From $4.68

Viewing:

Overview

17MHz I/Q Lowpass Output Noise Filters
Wide Range 1.8V to 5.25V Supply Voltage
Frequency Range: 40MHz to 500MHz
THD < 0.14% (–57dBc) at 800mV_P-P Differential Output Level
IF Overload Detector
Log Linear Gain Control Range: –7dB to 56dB
Baseband I/Q Amplitude Imbalance: 0.2dB
Baseband I/Q Phase Imbalance: 0.6°
7.8dB Noise Figure at Max Gain
Input IP3 at Low Gain: –1dBm
Low Supply Current: 24mA
Low Delay Shift Over Gain Control Range: 2ps/dB
Outputs Biased Up While in Standby
16-Lead QFN 4mm × 4mm Package with Exposed Pad

The LT5546 is a 40MHz to 500MHz monolithic integrated quadrature demodulator with variable gain amplifier (VGA) and 17MHz I/Q baseband bandwidth designed for low voltage operation. It supports standards that use a linear modulation format. The chip consists of a VGA, quadrature down-converting mixers and 17MHz lowpass noise filters (LPF). The LO port consists of a divide-by-two stage and LO buffers. The IC provides all building blocks for IF down-conversion to I and Q baseband signals with a single supply voltage of 1.8V to 5.25V. The VGA gain has a linear-in-dB relationship to the control input voltage. Hard-clipping amplifiers at the mixer outputs reduce the recovery time from a signal overload condition. The lowpass filters reduce the out-of-band noise and spurious frequency components. The –3dB corner frequency of the noise filters is approximately 17MHz and has a first order roll-off. The standby mode provides reduced supply current and fast transient response into the normal operating mode when the I/Q outputs are AC-coupled to a baseband chip.

Applications

GPS IF Receivers
Satellite IF Receivers
VHF/UHF Receivers
Wireless Local Loop

Part Models: 2
1ku List Price: Starting From $4.68

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LT5546EUF#PBF	16-Lead QFN (4mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT5546EUF#TRPBF	16-Lead QFN (4mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Hardware Ecosystem

Parts	Product Life Cycle	Description
Analog to Digital Converters (ADCs) 1
LTC2264-12	PRODUCTION	12-Bit, 40Msps Low Power Dual ADCs
Modulators & Demodulators 1
LT5506	PRODUCTION	40MHz to 500MHz Quadrature Demodulator with VGA
Phase-Locked Loop (PLL) Synthesizers 1
LTC6948	LAST TIME BUY	Ultralow Noise 0.37GHz to 6.39GHz Fractional-N Synthesizer with Integrated VCO
RF Mixers 1
LTC5510	PRODUCTION	1MHz to 6GHz Wideband High Linearity Active Mixer

Tools & Simulations

ADIsimRF

ADIsimRF is an easy-to-use RF signal chain calculator. Cascaded gain, noise, distortion and power consumption can be calculated, plotted and exported for signal chains with up to 50 stages. ADIsimRF also includes an extensive data base of device models for ADI’s RF and mixed signal components.

Open Tool