AFE1103E

Analog Front End (AFE) Overview

The AFE1103E is a monolithic Analog Front End (AFE) designed for HDSL and MDSL applications, fabricated on 0.6 μm CMOS technology. It provides the complete analog interface required to connect digital signal processors like the Bt8952 to external compromise hybrids and line transformers. The device integrates transmit and receive sections, including pulse forming, filtering, buffering, and digitization. It operates on a single +5V analog supply with a 3.3V or 5V digital supply, dissipating 250 mW at 3.3V digital logic. The unit supports scalable clock speeds from 196 kbps to 1.168 Mbps and is housed in a 48-pin SSOP package.

Analog Front End (AFE) Feature Summary

• Integrated solution for T1, E1, and MDSL operation with clock scalability from 196 kbps to 1.168 Mbps
• Transmit section features a switched-capacitor pulse former and differential line driver compliant with Bellcore TA-NWT-3017 and ETSI RTR/TM-03036 standards
• Receive section utilizes a fourth-order delta-sigma ADC providing 14-bit resolution with programmable gain (0 dB to 9 dB)
• Operates on a single +5V analog supply with 3.3V or 5V digital supply options

Analog Front End (AFE) Applications

• HDSL system analog front ends connecting to Bt8952 digital signal processors
• MDSL system interfaces requiring compact analog circuitry
• Telecommunications equipment utilizing T1 or E1 transmission standards

Analog Front End (AFE) Procurement Notes

Verify component status as Texas Instruments classifies the standard AFE1103E as NRND (Not Recommended for New Designs). Confirm availability of alternative packaging such as the AFE1103E/1K if reel quantities are required. Ensure design compliance with RoHS and lead-free specifications defined in the Package Option Addendum before procurement.

Analog Front End (AFE) Selection Notes

Select this component when a single-chip analog interface for HDSL/MDSL is required to minimize board size and cost. Ensure the design accommodates a 48-pin SSOP footprint and provides separate analog (+5V) and digital (3.3V or 5V) power domains. Verify that the host processor can provide the necessary symbol clock and sync signals within the specified timing constraints.

Analog Front End (AFE) Part Context

The AFE1103E is manufactured by Texas Instruments, originally developed by Burr-Brown Corporation. It serves as a second source for the Brooktree Bt8921. The device is part of the HDSL/MDSL Analog Front End product family, designed to reduce system complexity by integrating all active analog circuitry needed for line interfacing.

Analog Front End (AFE) Replacement Considerations

The AFE1103E is functionally equivalent to the Brooktree Bt8921. For new designs, verify current TI recommendations regarding the NRND status of the AFE1103E and consider available alternatives or the tape-and-reel variant AFE1103E/1K if production volume requirements change.