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ST70136G Fiches technique(PDF) 1 Page - STMicroelectronics |
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ST70136G Fiches technique(HTML) 1 Page - STMicroelectronics |
1 / 24 page 1/24 September 2001 s WIDE TRANSMIT AND RECEIVE DYNAMIC RANGE TO REDUCE EXTERNAL FILTERING REQUIREMENTS s RECEIVE PROGRAMMABLE GAIN: 0 TO 31dB GAIN IN 1dB STEPS s RECEIVE PROGRAMMABLE ATTENUATOR 0,-4dB, -8dB, -12dB s 12-BIT A/D CONVERTER IN RECEIVE PATH s TRANSMIT PROGRAMMABLE GAIN: 0 TO -15dB IN 1dB STEPS s 14-BIT D/A CONVERTER IN TRANSMIT PATH s LOW POWER MODE: 10mW IN LISTENING MODE, 250 µW IN POWER DOWN s TONE DETECTOR: ACTIVITY DETECTION FOR WAKE-UP FUNCTION s 64-PIN TQFP PACKAGE s 64-PIN LFBGA PACKAGE s 0.50 µm, 5V BICMOS TECHNOLOGY s 3.3V DIGITAL INTERFACE s 5V ANALOG INTERFACE INTRODUCTION The ST70136 ADSL Analog Front End (AFE) chip implements the analog transceiver functions required in a Customer Premise ADSL modem. It connects the digital modem chip with the loop driver and hybrid balance circuits. The AFE has been designed with high dynamic range in order to greatly reduce the external filter- ing requirements at the front end. The AFE chip and its companion digital chip along with a loop driver, implement the complete G.992.2 and G.992.1 DMT modem solution. 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. The AFE transmit path consists of a 14-bit D/A converter, followed by a programmable gain amplifier (TxPGA). The transmit gain is program- mable from 0 to -15dB in 1dB steps. TQFP64 Full Plastic (10 x 10 x 1.40 mm) ORDER CODE: ST70136B LFBGA64 (8 x 8 x 1.7 mm) ORDER CODE: ST70136G Figure 1 : Overall Application Block Diagram Software for Control xDSL PC PCI or USB PCI or USB DMT xDSL AFE ST70137 ST70136 LOOP DRIVER TS612/TS652 LINE HYBRID ST70136 CPE ADSL ANALOG FRONT END |
Numéro de pièce similaire - ST70136G |
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Description similaire - ST70136G |
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