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ST70136
CPE ADSL ANALOG FRONT END
s WIDE TRANSMIT AND RECEIVE DYNAMIC s s s s s s s s s s s s
RANGE TO REDUCE EXTERNAL FILTERING REQUIREMENTS RECEIVE PROGRAMMABLE GAIN: 0 TO 31dB GAIN IN 1dB STEPS RECEIVE PROGRAMMABLE ATTENUATOR 0,-4dB, -8dB, -12dB 12-BIT A/D CONVERTER IN RECEIVE PATH TRANSMIT PROGRAMMABLE GAIN: 0 TO -15dB IN 1dB STEPS 14-BIT D/A CONVERTER IN TRANSMIT PATH LOW POWER MODE: 10mW IN LISTENING MODE, 250µW IN POWER DOWN TONE DETECTOR: ACTIVITY DETECTION FOR WAKE-UP FUNCTION 64-PIN TQFP PACKAGE 64-PIN LFBGA PACKAGE 0.50µm, 5V BICMOS TECHNOLOGY 3.3V DIGITAL INTERFACE 5V ANALOG INTERFACE The AFE receive path contains a programmable gain amplifier (RxPGA), a low pass anti-aliasing filter, and a 12-bit A/D converter. The RxPGA is digitally programmable from 0 to 31dB in 1dB steps.