AD73311ARZ

Overview

The AD73311ARZ is a low-cost, low-power CMOS general-purpose analog front-end processor manufactured by Analog Devices. It integrates a 16-bit A/D converter and a 16-bit D/A converter within a single 20-lead SOIC package. The device 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. Key electrical specifications include a maximum sample rate of 64 kS/s, an ADC signal-to-noise ratio (SNR) of 75 dB, and a DAC SNR of 70 dB over the voiceband. It features programmable input/output gain, an on-chip reference, and a flexible serial port interface for DSP connectivity.

Feature Summary

• Integrated 16-bit ADC and 16-bit DAC channels with sigma-delta modulation architecture
• Maximum sample rate of 64 kS/s with programmable input/output gain ranges
• On-chip reference voltage generator enabling single-supply operation
• Flexible serial port supporting cascade connection of up to eight devices

Applications

• Speech processing and enhancement systems
• Cordless and personal communications equipment
• Telephony applications including low bit-rate compression
• Active control of sound and vibration
• General purpose analog I/O data acquisition

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix 'ARZ' corresponds to the 20-lead SOIC package variant. Check current lifecycle status as older components may face discontinuation risks. Ensure ESD precautions are observed during handling due to sensitivity. Validate that the industrial temperature range (-40°C to +85°C) meets system requirements.

Selection Notes

Select this component when designing speech or telephony systems requiring integrated analog front-end processing. The 16-bit resolution and 64 kS/s rate suit voice-bandwidth applications. Consider the 50 mW power consumption for battery-operated devices. Ensure the host DSP supports the required serial port timing. Verify that external digital filtering can be implemented to optimize bandwidth and SNR if needed beyond the internal filter capabilities.

Part Context

The AD73311 belongs to Analog Devices' family of general-purpose analog front-end processors designed for cost-sensitive audio and communication applications. It serves as a complete solution for converting analog voice signals to digital data and vice versa without requiring external amplifiers or complex filtering stages in many standard telephony designs.

Replacement Considerations

Direct pin-compatible replacements within the same series include the AD73311ARS (SSOP package). Other variants like the AD73311AR offer identical functionality in different package options. Cross-model substitution requires careful verification of pinout compatibility and electrical parameter alignment with the original design constraints.