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MC7447AHX1000NB

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File Size : 116 KB Manufacturer:FREESCALE Description: The MC7447AHX1000NB is a four-channel PCM CODEC with on-chip digital filters. It provides the four-wire solution for the subscriber line circuitry in digital switches. The MC7447AHX1000NB converts analog voice signals to digital PCM samples and digital PCM samples back to analog voice signals. Digital filters are used to bandlimit the voice signals during conversion. High performance oversampling Analog-to-Digital Converters (ADC) and Digital-to-Analog Converters (DAC) in the MC7447AHX1000NB provide the required conversion accuracy. The associated decimation and interpolation filters are realized with both dedicated hardware and Digital Signal Processor (DSP). The DSP also handles all other necessary functions such as PCM bandpass filtering, sample rate conversion and PCM companding. See the Functional Block Diagram. In the transmit path, the analog voice signal input from VIN pin is converted to PCM code by ADC, DSP and PCM companding circuits. Band-limiting functions as specified in ITU-T are implemented by digital filters. At last the fully processed signal is transferred to the GCI interface, in a compressed or linear signal presentation. In the receive path, the digital signal is received via the GCI interface. Then it is expanded and sent to the DSP for interpolation and receive channel filtering function. The filtered signal is then sent to an oversampling DAC. The DAC output is post-filtered and then delivered at VOUT pin by a power amplifier. The amplifier can drive resistive load higher than 300 Ω AC.


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	1PCS	100PCS	1K	10K
价格


型号：MC7447AHX1000NB 厂家：FREESCALE 封装：126 批号：04+ 数量：BGA360 说明：


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