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37952

Features: · FULLY INTEGRATED AFE FOR CPE ADSL· OVERALL 12 BIT RESOLUTION, 1.1MHz SIGNAL BANDWIDTH IN Rx· 8.8MS/s ADC· 8.8MS/s DAC· THD: -60dB @FULL SCALE· 4-BIT DIGITAL INTERFACE TO/FROM THE DMT MODEM· 1V FULL SCALE INPUT· DIFFERENTIAL ANALOG I/O· ACCURATE CONTINUOUS-TIME CHANNEL FILTERING· 3rd &a...

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SeekIC No. : 004229211 Detail

37952: Features: · FULLY INTEGRATED AFE FOR CPE ADSL· OVERALL 12 BIT RESOLUTION, 1.1MHz SIGNAL BANDWIDTH IN Rx· 8.8MS/s ADC· 8.8MS/s DAC· THD: -60dB @FULL SCALE· 4-BIT DIGITAL INTERFACE TO/FROM THE DMT MOD...

37952 Data Sheet

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Part Number:
37952
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

· FULLY INTEGRATED AFE FOR CPE ADSL
· OVERALL 12 BIT RESOLUTION, 1.1MHz SIGNAL BANDWIDTH IN Rx
· 8.8MS/s ADC
· 8.8MS/s DAC
· THD: -60dB @FULL SCALE
· 4-BIT DIGITAL INTERFACE TO/FROM THE DMT MODEM
· 1V FULL SCALE INPUT
· DIFFERENTIAL ANALOG I/O
· ACCURATE CONTINUOUS-TIME CHANNEL FILTERING
· 3rd & 4th ORDER TUNABLE CONTINUOUS TIME LP FILTERS
· 0.5 WATT AT 3.3V
· 0.5mm HCMOS5 LA TECHNOLOGY
· 64 PIN TQFP PACKAGE


Pinout

Connection Diagram


Specifications

Symbol Parameter Minimum Maximum Unit
VDD Any VDD Supply Voltage, related to substrate - 0.5 5 V
Vin Voltage at any input pin - 0.5 VDD +0.5 V
Tstg Storage Temperature - 40 125 ×C
TL Lead Temperature (10 second soldering)   300 ×C
ILU Latch - up current @80°C 100   mA
IAVDD Analog Supply Current @ 3.6V - normal operation   165 mA
IAVDD Analog Supply Current @ 3.6V - power down   30 mA
IDVDD Analog Supply Current @ 3.6V - normal operation   56 mA
IDVDD Analog Supply Current @ 3.6V - power down   50 mA



Description

37952 is the Analog Front End of the STMicroelectronics ASCOTTM ADSL chipset and when coupled with ST70135A or ST70235 (DMT modem) allows to get a T1.413 Issue 2 or G.dmt compliant solution.

The 37952 analog front end handles 2 transmission channels on a balanced 2 wire interconnection;a 16 to 640Kbit/s upstream transmit channel and a 1.536Mbit/s to 8.192Mbit/s downstream receive channel.

This asymmetrical data transmission system uses high resolution, high speed analog to digital and digital to analog conversion and high order analog filtering to reduce the echo and noise in both receivers and transmitters.

External low noise driver and input stage used with 37952 guarantee low noise performances. The filters, with a programmable cutoff frequency,use automatic Continuous Time Tuning to avoid time varying phase characteristic which can be of dramatic consequence for DMT modem.

It requires few external components, uses a 3.3V supply. It is packaged in a 64-pin TQFP in order to reduce PCB area.




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