AFE7225

(ACTIVE) Dual 12-Bit, 125 MSPS ADC with dual 12-Bit, 250 MSPS DAC and auxilliary ADC and DACs

Diagrams

Functional diagram

Description

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 9x9mm QFN package (RGC). The AFE7225/7222 is built on Texas Instrument’s low power analog CMOS process and is specified over the full industrial temperature range (–40°C to 85°C).

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)

Parametrics

# ADCs 2    
ADC Resolution (Bits) 12    
Pin/Package 64VQFN    
DACs (#) 2    
Approx. Price (US$) 29.50 | 1ku    
DAC: Resolution (Bits) 12    
DAC: Sampling Rate (MSPS) 250    
Operating Temperature Range (C) -40 to 85    
Special Features Decimation^Auxiliary ADC/DACs^CMOS Interface^Serial LVDS Interface    

Companion Products

Technical Documents

Datasheet (1)

Application notes (2)

User guides (2)

Selection guides (1)

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