Mixed Signal Transceiver


Mixed Signal Transceiver

Mixed Signal Transceiver

The AFE7225/7222 is an analog front end designed for full- or half-duplex radios. Over-sampling transmit 12-bit DACs provide output frequencies from baseband to Nyquist. Under-sampling receive 12-bit ADCs allow analog inputs from baseband to ~230MHz. Most blocks within the AFE7225/7222 are independently controlled for optimization of power consumption versus utilization. Two auxiliary control 12-bit DACs and a dual input auxiliary monitoring 12-bit ADC are available via serial interface. Digital features include QMC (quadrature modulation correction), interpolation, decimation, RMS/peak power meter and mixers with independent NCOs for RX and TX path.

The AFE7225/7222 is available in a 64-pin 9×9mm QFN package (RGC).

Device Uses

Portable, Low Power Radio

Wireless Infrastructure

Point-to-Point Radio

Pico-Cell BTS

Features

AFE7225

  • Dual 12-Bit 250MSPS TX DACs
  • Dual 12-Bit 125MSPS RX ADCs

AFE7222

  • Dual 12-Bit 130MSPS TX DACs
  • Dual 12-Bit 65MSPS RX ADCs

OPTIONS

  • Dual 12-Bit Auxiliary DACs
  • Dual Input 12-Bit Auxiliary ADC
  • TX Path Interpolation by 2 or 4
  • RX Path Decimation by 2
  • 3.0V/1.8V Supplies, Low Power
  • Fast Wakeup Modes for Half-Duplex
  • Coarse or Fine Digital Mixer
  • Quadrature Modulation Corrections
  • Clock Input Divide/Multiply
  • Serial LVDS or Interleaved Parallel CMOS Interface
  • 64-Pin QFN Package (9mm × 9mm)

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