AD8347:  800 MHz to 2.7 GHz RF / IF Quadrature Demodulator

The AD8347 is a single chip, broadband 2.7GHz quadrature demodulator. The part integrates 65dB linear-in-dB AGC, divided between RF input and at the baseband outputs following the mixers. The In-phase ...More

AD8347:  800 MHz to 2.7 GHz RF / IF Quadrature Demodulator

Product Description

The AD8347 is a single chip, broadband 2.7GHz quadrature demodulator. The part integrates 65dB linear-in-dB AGC, divided between RF input and at the baseband outputs following the mixers. The In-phase and Quadrature signals are brought out off chip for filtering prior to the final output amplifier stage. The final output amplifiers allow the user to adjust the DC common mode level to provide a direct interface into a dual channel I/Q ADC.

With 65dB linear-in-dB gain control, 50MHz demodulation bandwidth and excellent phase and amplitude balance the AD8347 is ideally suited direct conversion radios in point to point and point to multipoint broadband wireless applications.

The AD8347 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.

Availability

Samples and an evaluation boards part number AD8347-EVAL are available to order.

Other Modulator/Demodulator products:

AD8345 - 250MHz - 1GHz RF/IF Modulator
AD8346 - 2.5 GHz Direct Conversion Quadrature Modulator

Features

  • 800MHz - 2.7GHz RF Input Range
  • Integrated 65dB AGC Amplifiers
  • Integrated Baseband Level Detectors
  • Integrated Baseband Output Amplifiers
  • Single Supply 2.7 to 5.5V with Power Down
  • Quadrature Phase Accuracy 3 degree
  • Amplitude Balance 0.3dB
  • Third Order Intercept IIP3 +12dB
  • Noise Figure 11dB
  • Low LO Drive -10dBm

Diagrams

AD8347 Diagram
Functional Block Diagram for AD8347

Specifications

Function Demod
RF Freq (MHz) 800 to 2700
IQ Freq (MHz) 65MHz
Phase Error (deg) 1Deg
Amplitude Error (dB) 0.3dB
VGA Range (dB) 69.5dB
NF 11dB
Voltage Supply (V) 2.7 to 5.5
Supply Current (max) 64mA
Power Down Turn On/Off 30µs
Package 28-Lead TSSOP

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AD630 Demod, Mod dc to 2 - - - - - +/- 15 5 20-Lead DIP $6.25
AD8333 Demod dc to 50 - 0.1 0.05 - -161 +/- 5 44 32-Lead LFCSP $9.06
AD8339 Demod dc to 50 50 1 0.25 - - 4.5 to 5.5 35 40-Lead LFCSP $12.09
AD8340 Vector Mod 700 to 1000 - - - - - 5 130 24-Lead LFCSP $7.59
AD8341 Vector Mod 1500 to 2400 - - - - -150.5 4.75 to 5.25 125 24-Lead LFCSP $7.59
AD8345 Mod 140 to 1000 80 0.5 0.2 - -155 2.7 to 5.5 65 16-Lead Tssop $5.02
AD8346 Mod 800 to 2500 70 1 0.2 - -147 2.7 to 5.5 45 16-Lead Tssop $4.45
AD8347 Demod 800 to 2700 65 1 0.3 69.5 - 2.7 to 5.5 64 28-Lead TSSOP $5.85
AD8348 Demod 50 to 1000 75 0.5 0.25 45 - 2.7 to 5.5 58 28-Lead TSSOP $5.01
AD8349 Mod 700 to 2700 160 0.3 0.1 - -156 5 135 16-Lead Tssop $5.02
ADL5370 Mod 250 to 1300 700 - - - -156 4.75 to 5.5 210 24-Lead LFCSP $5.04
ADL5371 Mod 700 to 1300 700 - - - -156 4.75 to 5.5 175 24-Lead LFCSP $5.04
ADL5372 Mod 1500 to 2500 700 - - - -158 4.75 to 5.5 175 24-Lead LFCSP $5.04
ADL5373 Mod 2300 to 3000 700 - - -