ADRF6516 Datasheet | Analog Devices

Data Sheet Features Matched pair of programmable filters and VGAs Continuous gain control range: 50 d B Digital gain control: 15 d B 6-pole Butterworth filter: 1 MHz to 31 MHz in 1 MHz steps, 1 d B corner frequency Preamplifier and postamplifier gain steps IMD3: >65 d Bc for 1.5 V p-p posite output HD2, HD3: >65 d Bc for 1.5 V p-p output Differential input and output Flexible output and input mon-mode ranges Optional dc offset pensation loop SPI programmable filter corners and gain steps Power-down feature Single 3.3 V supply operation 31 MHz, Dual Programmable Filters and Variable Gain Amplifiers ADRF6516 FUNCTIONAL BLOCK DIAGRAM ENBL INP1 INM1 VPS VICM OFS1 VPS VPSD D LE CLK DATA SDO VPS SPI OPP1 OPM1 GAIN VOCM OPM2 OPP2 APPLICATIONS Baseband IQ receivers Diversity receivers ADC drivers Point-to-point and point-to-multipoint radio Instrumentation Medical INP2 INM2 OFDS OFS2 VPS Figure 1. http://..net/ GENERAL DESCRIPTION The ADRF6516 is a matched pair of fully differential, low noise and low distortion programmable filters and variable gain amplifiers (VGAs). Each channel is capable of rejecting large out-of-band interferers while reliably boosting the desired signal, thus reducing the bandwidth and resolution requirements on the analog-to-digital converters (ADCs). The excellent matching between channels and their high spurious-free dynamic range over all gain and bandwidth settings make the ADRF6516 ideal for quadrature-based (IQ) munication systems with dense constellations, multiple carriers, and nearby interferers. The filters provide a six-pole Butterworth response with 1 d B corner frequencies programmable through the SPI port from 1 MHz to 31 MHz in 1 MHz steps. The preamplifier that precedes the filters offers a SPI-programmable option of either 3 d B or 6 d B of gain. The preamplifier sets a differential input impedance of 1600 Ω and has a mon-mode voltage that defaults to VPS/2...