AD8348

PRODUCTION

50 MHz to 1000 MHz Quadrature Demodulator

Data Sheet (Rev. A) Product Selection Table
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Overview

  • 50 MHz – 1000 MHz RF input range
  • Integrated 45 dB linear-in-dB VGA IF amplifier
  • Integrated baseband output amplifiers
  • Demodulation bandwidth 75 MHz
  • Quadrature phase accuracy 0.5°
  • Amplitude balance 0.25 dB
  • Third order intercept IIP3
    +28 dBm (min gain)
  • Noise figure 11 dB (max gain)
  • Low LO drive –10 dBm
  • Single supply 2.7 V to 5.5 V with power down

The AD8348 is a broadband quadrature demodulator with an integrated intermediate frequency (IF), variable gain amplifier (VGA), and integrated baseband amplifiers. It is suitable for use in communications receivers, performing quadrature demodulation from IF directly to baseband frequencies. The baseband amplifiers are designed to interface directly with dual-channel ADCs, such as the AD9201, AD9283, and AD9218, for digitizing and post-processing.

The IF input signal is fed into two Gilbert cell mixers through an X-AMP® VGA. The IF VGA provides 44 dB of gain control. A precision gain control circuit sets a linear-in-decibel gain characteristic for the VGA and provides temperature compensation. The LO quadrature phase splitter employs a divide-by-2 frequency divider to achieve high quadrature accuracy and amplitude balance over the entire operating frequency range.

The AD8348 is fabricated on an advanced bipolar process, operating on a single 3 or 5 volt supply, packaged in space saving 28 lead thin shrunk small outline (TSSOP) package and fully specified over the –40 to +85 C temperature range

Samples AD8348ARU and evaluation boards AD8348-EVAL are available

OTHER MODULATOR/DEMODULATOR PRODUCTS

    AD8345 250MHz – 1GHz RF/IF Modulator
    AD8346 800MHz – 2.5GHz Modulator
    AD8347 800MHz – 2.7GHz Demodulator
    AD8349 700MHz – 2.7GHz Modulator
AD8348
50 MHz to 1000 MHz Quadrature Demodulator
AD8348 Functional Block Diagram AD8348 Pin Configuration
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Documentation

Data Sheet 1

Application Note 1

Technical Articles 1

Evaluation Design File 1

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Analog to Digital Converters (ADCs) 7
AD9258
PRODUCTION 14-Bit, 125 MSPS, 1.8 V Dual Analog-to-Digital Converter (ADC)
AD9251
PRODUCTION 14-Bit, 20 MSPS/40 MSPS/65 MSPS/80 MSPS, 1.8 V Dual Analog-to-Digital Converter
AD9268
PRODUCTION 16-Bit, 125 MSPS/105 MSPS/80 MSPS, 1.8 V Dual Analog-to-Digital Converter
AD9650
RECOMMENDED FOR NEW DESIGNS

16-Bit, 25 MSPS/65 MSPS/80 MSPS/105 MSPS, 1.8 V Dual Analog-to-Digital Converter (ADC)
AD9231
PRODUCTION 12-Bit, 20 MSPS/40 MSPS/65 MSPS/80 MSPS, 1.8 V Dual Analog-to-Digital Converter
AD9269
RECOMMENDED FOR NEW DESIGNS 16-Bit, 20 MSPS/40 MSPS/65 MSPS/80 MSPS, 1.8 V Dual Analog-to-Digital Converter
AD9262
NOT RECOMMENDED FOR NEW DESIGNS 16-Bit, 2.5 MHz/5 MHz/10 MHz, 30 MSPS to 160 MSPS Dual Continuous Time Sigma-Delta ADC
Differential Amplifiers 7
ADA4950-1
RECOMMENDED FOR NEW DESIGNS Low Power Selectable Gain Differential ADC Driver, G = 1, 2, 3
ADA4950-2
RECOMMENDED FOR NEW DESIGNS Low Power Selectable Gain Differential ADC Driver, G = 1, 2, 3
ADL5562
RECOMMENDED FOR NEW DESIGNS 3.3 GHz Ultralow Distortion RF/IF Differential Amplifier
ADL5565
RECOMMENDED FOR NEW DESIGNS

6 GHz Ultrahigh Dynamic Range Differential Amplifier
AD8366
RECOMMENDED FOR NEW DESIGNS DC to 600 MHz, Dual-Digital Variable Gain Amplifiers
ADA4930-1
RECOMMENDED FOR NEW DESIGNS

Ultralow Noise Drivers for Low Voltage ADCs
ADA4930-2
RECOMMENDED FOR NEW DESIGNS Ultralow Noise Drivers for Low Voltage ADCs
Phase-Locked Loop (PLL) Synthesizers 3
ADF4350
PRODUCTION Wideband Synthesizer with Integrated VCO
ADF4106
PRODUCTION 6 GHz integer-N PLL
ADF4156
PRODUCTION 6.2 GHz Fractional-N Frequency Synthesizer
Variable Gain Amplifiers (VGA) 2
ADRF6510
Obsolete 30 MHz Dual Programmable Filters and Variable Gain Amplifiers
ADRF6516
Obsolete 31 MHz, Dual Programmable Filters and Variable Gain Amplifiers
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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.

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ADIsimPLL™

ADIsimPLL enables the rapid and reliable evaluation of new high performance PLL products from ADI. It is the most comprehensive PLL Synthesizer design and simulation tool available today. Simulations performed include all key non-linear effects that are significant in affecting PLL performance. ADIsimPLL removes at least one iteration from the design process, thereby speeding the design- to-market.

Open Tool

Evaluation Kits

EVAL-AD8348

AD8348 Evaluation Board

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Product Details

AD8348-EVALZ is a fully populated, 4-layer, FR4-based evaluation board designed to allow easy evaluation of all features of the AD8348. The evaluation board integrates a prototype area for a filter design at the mixer outputs, SMA connectors to and from AD8348 with optimized trace routing for improved signal integrity, and requires only a single supply within the range of 2.7 V to 5.5 V.
EVAL-AD8348
AD8348 Evaluation Board

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