AFE1103E/1K

Analog Front End (AFE) Overview

The AFE1103E/1K is a monolithic analog front end fabricated on 0.6 μm CMOS technology, designed for HDSL and MDSL systems. It operates on a single +5V analog supply with digital logic compatible with 3.3V or 5V levels. The device integrates transmit and receive sections to interface directly with the Brooktree Bt8952 digital signal processor. Key electrical parameters include a 14-bit resolution ADC in the receive channel, programmable gain ranging from 0dB to 9dB, and an output power of 13 dBm. Power dissipation is specified at 250 mW with a 3.3V digital supply and 300 mW with a 5V digital supply.

Analog Front End (AFE) Feature Summary

• Integrated T1/E1/MDSL analog interface supporting bit rates from 196 kbps to 1.168 Mbps
• 14-bit delta-sigma ADC with four programmable gain settings (0, 3.25, 6, and 9 dB)
• Differential line driver compliant with Bellcore TA-NWT-3017 and ETSI RTR/TM-03036 standards
• First-order echo cancellation via subtraction of hybrid input from line input

Analog Front End (AFE) Applications

• HDSL system analog front ends
• MDSL system analog front ends
• T1 and E1 transmission equipment

Analog Front End (AFE) Procurement Notes

The AFE1103E variant is classified as NRND (Not Recommended for New Designs), while the AFE1103E/1K and AFE1103E/1KG4 are listed as ACTIVE. Verification of current production status and lead times is required before integration into new designs due to the discontinuation status of the non-reel version.

Analog Front End (AFE) Selection Notes

Select the AFE1103E/1K for applications requiring tape-and-reel packaging with a standard quantity of 1000 units. Ensure the design accommodates the 48-pin SSOP package dimensions. Verify that the digital supply voltage matches the specific power consumption requirements, as dissipation increases from 250 mW to 300 mW when operating DVDD at 5V instead of 3.3V.

Analog Front End (AFE) Part Context

This component is second-sourced by Brooktree as the Bt8921. It functions as a complete analog solution to connect digital signal processors to external compromise hybrids and line transformers, eliminating the need for discrete active components in the transmit and receive paths.

Analog Front End (AFE) Replacement Considerations

The Brooktree Bt8921 is the functional second source for this device. Designers should verify pin compatibility and electrical specifications against the Bt8921 datasheet prior to substitution.