Description

The HC6094 performs the Analog processing for the ADSL chip set. The transmit chain has a 14 Bit DAC, a third-order Chebyshev reconstruction filter and a programmable attenuator (-12 to 0dB) capable of driving a 220Ω differential load. The receiver chain has a high impedance input stage, programmable gain stage (0 to 24dB), additional programmable gain (-9 to 18dB) and a third-order Chebyshev anti-aliasing filter for driving an off-chip A/D.

Laser trimmable thin-film resistors are used to set the filter cutoff frequency and DAC linearity. The transmit and receive signal chains are specified at 65dB MTPR.

Features

• 14-Bit 5 MSPS DAC

• Programmable Gain Stages

• Anti-Aliasing and Reconstruction Filters

Applications

• FDM DMT ADSL

• CAP ADSL

• EC DMT ADSL

• Communications Receiver