MAX19708ETM+

Analog Front End (AFE) Overview

The MAX19708ETM+ is an ultra-low-power, mixed-signal analog front-end (AFE) designed for TD-SCDMA applications. It integrates dual 10-bit, 11Msps receive ADCs and dual 10-bit, 11Msps transmit DACs with baseband filters. The device includes three 12-bit auxiliary DACs and a 10-bit, 333ksps housekeeping ADC. Operating on a +2.7V to +3.3V analog supply and +1.8V to +3.3V digital supply, it achieves typical power consumption of 36.9mW in Tx-Rx Fast Mode at a 5.12MHz clock frequency. The component operates within the -40°C to +85°C temperature range and is housed in a 48-pin thin QFN package.

Analog Front End (AFE) Feature Summary

• Dual 10-bit, 11Msps Rx ADCs and Dual 10-bit, 11Msps Tx DACs
• Ultra-low power consumption: 36.9mW (Fast Mode), 19.8mW (Slow Mode)
• Integrated TD-SCDMA baseband filters with >55dB stopband rejection
• Three 12-bit, 1µs settling aux-DACs and a 10-bit, 333ksps aux-ADC

Analog Front End (AFE) Applications

• TD-SCDMA Handsets
• TD-SCDMA Data Cards
• Portable Communication Equipment

Analog Front End (AFE) Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation. The '+' suffix indicates lead-free packaging compliance. Confirm availability status as distribution channels may list discontinued or obsolete inventory. Ensure the 48-pin Thin QFN-EP package matches the design requirements.

Analog Front End (AFE) Selection Notes

Select this AFE for time-division duplex systems requiring low power and high dynamic performance. Verify that the required input/output voltage ranges align with the selectable ±410mV or ±500mV full-scale outputs. Ensure the system supports the shared 10-bit parallel digital bus for half-duplex operation and utilizes the 3-wire serial interface for control.

Analog Front End (AFE) Part Context

The MAX19708 belongs to the Maxim Integrated AFE family optimized for TD-SCDMA standards. It shares pin compatibility with other variants in the series, such as the MAX19707 and MAX19706, which offer different channel counts or sampling rates. The ETM+ designation specifies the 48-pin thin QFN package with an exposed paddle for thermal management.

Analog Front End (AFE) Replacement Considerations

Consult the datasheet selector guide for pin-compatible alternatives within the MAX1970x family. Verify functional equivalence regarding channel count, resolution, and power modes before substitution.