AD73311LARUZ-RL

Overview

The AD73311LARUZ-RL is a low-cost, low-power CMOS general-purpose analog front-end processor manufactured by Analog Devices Inc. It integrates a 16-bit A/D converter and a 16-bit D/A converter within a single package. The device supports programmable input/output sample rates up to 64 kS/s and features a flexible serial port for cascading multiple devices. It operates on a single supply voltage ranging from +2.7 V to +5.5 V, with maximum power consumption of 50 mW at 2.7 V. The component includes an on-chip reference voltage and is housed in a 20-lead SOIC or SSOP package.

Feature Summary

• 16-Bit Resolution: Features both a 16-bit ADC and a 16-bit DAC for high-fidelity signal processing.
• High SNR Performance: Provides 75 dB SNR for the ADC and 70 dB SNR for the DAC over voiceband bandwidth.
• Low Group Delay: Offers typical group delays of 25 µs per ADC channel and 50 µs per DAC channel.
• Flexible Serial Interface: Supports up to 8 devices connected in cascade via a standard serial port.

Applications

• Speech Processing
• Cordless and Personal Communications
• Telephony Systems
• Active Control of Sound and Vibration

Procurement Notes

Verify the specific suffix 'RL' against official documentation to confirm reel packaging status, as datasheets primarily list tube packages (SOIC/SSOP). Confirm availability through authorized distributors, noting that older components may have limited stock or end-of-life statuses. 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-to-digital and digital-to-analog conversion in speech and telephony systems. Consider the 64 kS/s maximum sample rate and 16-bit resolution for adequate audio quality. Evaluate the single-supply operation (+2.7 V to +5.5 V) for power constraints. Ensure the host DSP can interface with the serial port timing requirements, specifically the MCLK and SCLK relationships defined in the specifications.

Part Context

The AD73311 is part of Analog Devices' family of general-purpose analog front-end processors designed for cost-sensitive and power-efficient applications. It serves as a complete solution for speech and telephony codecs, eliminating the need for external amplifiers and filters in many designs. The device is suitable for embedded systems where space and power are critical constraints.

Replacement Considerations

Direct replacements should be sought from the same product family or similar low-power codec ICs. Verify pin compatibility and electrical specifications, particularly the supply voltage range and serial interface timing. Check for any changes in package dimensions if transitioning between SOIC and SSOP variants.

FAQ

What is the maximum sample rate supported by the AD73311?

The AD73311 supports a maximum sample rate of 64 kS/s for both the ADC and DAC channels.

How does the AD73311 achieve high resolution with sigma-delta modulation?

It uses oversampling and noise-shaping techniques to spread quantization noise over a wide bandwidth, which is then removed by a digital decimation filter to achieve 16-bit resolution.

Can multiple AD73311 devices be used together?

Yes, the flexible serial port allows up to 8 devices to be connected in cascade for multi-channel applications.