AD73311LARSZ

Overview

The AD73311LARSZ is a low-cost, low-power CMOS general-purpose analog front-end processor manufactured by Analog Devices. It integrates a 16-bit A/D conversion channel and a 16-bit D/A conversion channel within a single package. The device supports programmable input/output sample rates up to 64 kS/s and features an on-chip reference voltage for single-supply operation. It operates on a single supply ranging from +2.7 V to +5.5 V, with maximum power consumption of 50 mW at 2.7 V. The component utilizes a flexible serial port interface to facilitate connection to industry-standard DSP engines.

Feature Summary

• Integrates 16-bit ADC and DAC channels with 75 dB ADC SNR and 70 dB DAC SNR over voiceband bandwidth.
• Features programmable gain amplifiers (PGA) allowing input gain adjustment over a 38 dB range and output gain over a 21 dB range.
• Includes an on-chip reference voltage generator and sigma-delta modulation architecture for high-resolution signal processing.
• Supports cascading of up to eight devices via a flexible serial port (SPORT) interface.

Applications

• Speech processing and enhancement systems
• Cordless and personal communications devices
• Telephony equipment and active sound/vibration control
• General purpose analog I/O and data communications

Procurement Notes

Verify the specific suffix 'L' against official documentation, as standard listings typically identify the SSOP variant as 'ARSZ'. Confirm current availability status, as this series may be subject to discontinuation or limited stock conditions in certain regions. Ensure ESD precautions are observed during handling due to the sensitivity of the CMOS technology.

Selection Notes

Select this component for applications requiring integrated analog front-end processing with low power consumption. The 16-bit resolution and sigma-delta architecture are suitable for voiceband signals where external digital filtering can further improve signal-to-noise ratio. Consider the 20-lead SSOP package constraints and verify that the required serial clock rates align with the master clock divider capabilities.

Part Context

The AD73311 belongs to a family of general-purpose analog front-end processors designed for speech and telephony applications. It replaces discrete solutions by combining ADC, DAC, PGA, and reference functions into one IC. The 'AR' designation indicates a 20-lead SOIC/SSOP package option, while the 'L' suffix requires verification against the manufacturer's ordering guide to confirm if it denotes a specific lead-free or environmental compliance variant.

Replacement Considerations

Direct pin-compatible replacements are not explicitly listed in the provided datasheet. Designers should evaluate other Analog Devices CODEC ICs or general-purpose AFE components that offer similar 16-bit resolution, serial interface compatibility, and operating voltage ranges. Verify functional equivalence regarding group delay and crosstalk specifications before substitution.