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ST70138B Folha de dados(PDF) 4 Page - STMicroelectronics |
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ST70138B Folha de dados(HTML) 4 Page - STMicroelectronics |
4 / 6 page 4/6 MTC20174 September 2004 This is preliminary information on a new product foreseen to be developed. Details are subject to change without notice. 6 FEATURES ■ Fully Integrated AFE and Line Driver for ADSL ■ Overall 12 bit resolution, 1.1MHz signal bandwidth ■ 8.8 MS/s ADC ■ 8.8 MS/s DAC ■ Differential analog I/O ■ Accurate continuous-time channel filtering ■ 5th & 4th order tunable continuous-time receive and transmit filters respectively ■ Support for multiple ADSL standards: – ANSI T1.413 Issue 2 – ITU G.992.1 (G.dmt) – Annex A – Annex B (ADSL over ISDN) – Annex C (ADSL over ISDN SBM/DBM/ G.dmt) – ITU G.992.2 (G.lite) ■ Highest performance: – Operation up to 18 kft (26 AWG) – More than 8 Mbps downstream and 832 Kbps upstream up to 8 kft (26 AWG) – More than 3 Mbps downstream and 760 kbps upstream up to 12 kft (26 AWG) ■ 100 pin TQFP package allows high-density board design ■ Power dissipation of 900mW at 25°C, typical 7 APPLICATIONS The MTC20174 is an ADSL Analog Front-End (AFE) with integrated Line-Driver for ATU-R appli- cations offering Annex A, B and C. 8 GENERAL DESCRIPTION The MTC20174 Analog Front End (AFE) with inte- grated line driver is designed for DMT based ADSL CPE modems compliant with ANSI T1.413 issue 2, ITU G.992.1 (G.dmt) and ITU G.992.2 (G.lite), for Annex A, B and C. It is intended to be used with the MTC20166 DMT modem and ATM framer as part of the MTK20170 chipset, but may also be used to support other ADSL signal processors. It includes the following parts: ■ A 12-bit 8.8Msamples/s DAC ■ A 13-bit 8.8Msamples/s ADC ■ Tunable low-pass and high-pass filters ■ Low-noise PGAs ■ A TX Pre-Amplifier ■ A TX Line-Driver ■ A fully integrated DCXO ■ A PLL-based frequency doubler ■ A filter tuning circuit ■ A dying gasp circuit ■ A digital module for control, test and interface The following figure provides a graphical repre- sentation of the MTC20174 functional blocks with an additional separation in RX and TX path. The analog and digital part have separated 3.3V power supplies. In addition some part of the ana- log section of the MTC20174 has a power supply of 5V. The typical total power consumption of the MTC20174 is 900mW for 12dBm of line power (full operation) at 250°C. The package is a 100 pin TQFP. DATA BRIEF ADSL ANALOG FRONT END WITH INTEGRATED LINE DRIVER FOR CPE APPLICATIONS Figure 3. Package Table 2. Order Codes Part Number Package Temperature MTC20174-TQ-C1 TQFP100 0 to 70°C MTC20174-TQ-C1TR Tape & Reel 0 to 70°C TQFP100 |
Nº de peça semelhante - ST70138B |
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Descrição semelhante - ST70138B |
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