AFE1115E

Analog Front End (AFE) Overview

The AFE1115E is an analog front-end integrated circuit designed for HDSL, MDSL, E1, and T1 applications. It integrates transmit and receive sections with a VCXO control DAC and oscillator circuitry. The device operates on a single 5V analog supply and a 3.3V to 5V digital supply. It features a 14-bit resolution receiver with programmable gain (-3dB to +9dB) and a transmit section supporting data rates from 196kbps to 1.168Mbps. Power dissipation is typically 300mW at 3.3V digital supply. The component is housed in a 56-pin SSOP package.

Analog Front End (AFE) Feature Summary

• Complete HDSL/MDSL analog interface with integrated VCXO and control DAC
• 14-bit delta-sigma ADC with programmable gain amplifier (-3dB, +3dB, +9dB)
• Scalable data rate operation from 196kbps to 1.168Mbps
• Supports E1, T1, and MDSL standards with compliant pulse masking

Analog Front End (AFE) Applications

• HDSL (High bit rate Digital Subscriber Line) systems
• MDSL (Multi-rate Digital Subscriber Line) equipment
• E1 and T1 line interface units
• Remote units requiring clock recovery via VCXO

Analog Front End (AFE) Procurement Notes

Verify the manufacturer origin, as the part was originally produced by Burr-Brown and is now distributed by Rochester Electronics. Confirm the specific package variant matches the 56-pin SSOP requirement. Ensure the operating temperature range of -40°C to +85°C aligns with system specifications. Check for any obsolescence notices or lifecycle status updates from the current distributor.

Analog Front End (AFE) Selection Notes

Select this component when designing HDSL or MDSL transceivers requiring a compact analog solution. Ensure the design supports a 5V analog supply and a 3.3V to 5V digital supply. Verify that the external crystal frequency can be set to 48x the baud rate for proper VCXO operation. Consider the 56-pin SSOP footprint and layout requirements for minimizing parasitic capacitance around the VCXO section.

Analog Front End (AFE) Part Context

The AFE1115E is part of the AFE1115 family, originally developed by Burr-Brown Corporation. It serves as a complete analog interface for connecting digital signal processors to telephone lines via compromise hybrids and transformers. The device simplifies HDSL system design by integrating filtering, buffering, and digitization functions into a single chip.

Analog Front End (AFE) Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. The AFE1115E is listed as obsolete by Rochester Electronics. Designers should evaluate current Texas Instruments or other manufacturers' HDSL/ADSL AFE solutions for modern replacements.