AD7371 Datasheet

• AD7371 -Receive Filter for 14-Bit ADC (AD7871)
  Programmable Gain (0dS to 24dB)
• 70dB Stopband Attenuation
• 75dB In-Band Signal-to-Noise Ratio
• Better Than - 75dB Total Harmonic Distortion
• CCITT V.32 and V.33 Compatible
• Small, 0.3", 24-Pin Plastic Package and 28-Pin PLCC

The AD7371 are reconstruction and antialiasing filters designed for use in high speed voiceband modems with speeds up to 14.4 kbits/sec, in accordance with CCITT V.32 and V.33 recommendations. These filters, along with the AD7871 ADC and a digital signal processor(DSP) can be used to implement a complete modem.

The AD7371 is the receive fIlter. It is a high order bandpass filter with a lower cutoff frequency of 180Hz and an upper cutoff frequency of 3.5kHz. The filter function is implemented using a second order low pass continuous time filter, a fourth order high pass switched capacitor filter and a seventh order low pass switched capacitor filter.