AD73311ARSZ

Overview

The AD73311ARSZ is a low-cost, low-power CMOS general-purpose analog front-end processor featuring integrated 16-bit ADC and DAC channels. It operates on a single supply ranging from +2.7V to +5.5V with maximum power consumption of 50mW at 2.7V. The device supports a maximum sample rate of 64 kS/s and includes programmable gain amplifiers offering 38 dB range for the ADC and 21 dB for the DAC. Key performance metrics include 75 dB SNR for the ADC and 70 dB SNR for the DAC within the voiceband. An on-chip reference voltage facilitates single-supply operation, while a flexible serial port allows cascading up to eight devices.

Feature Summary

• Integrated 16-bit A/D and D/A conversion channels with 75 dB (ADC) and 70 dB (DAC) SNR in voiceband.
• Programmable input/output gain ranges: 38 dB for ADC and 21 dB for DAC.
• Maximum sample rate of 64 kS/s with low group delay (25 µs typical per channel).
• On-chip reference voltage and single (+2.7V to +5.5V) supply operation.
• Flexible serial port supporting cascade connections of up to 8 devices.

Applications

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

Procurement Notes

Verify the specific ordering suffix 'ARSZ' against the manufacturer's current ordering guide to confirm package type (SOIC/SSOP) and temperature range (-40°C to +85°C). Ensure compatibility with required digital interface timing parameters, specifically MCLK and SCLK constraints, before integration. Confirm that the 20-lead package option matches the target PCB footprint requirements.

Selection Notes

Select this component for applications requiring simultaneous high-resolution analog input and output within a voiceband frequency range. Consider the 25 µs group delay for active control loops where phase linearity is critical. Evaluate power budget constraints, as total current varies significantly based on whether ADC, DAC, or reference sections are active. Ensure external digital filtering capabilities are available if extended bandwidth beyond 3.4 kHz is required.

Part Context

The AD73311 is part of Analog Devices' family of general-purpose analog front-end processors designed for speech and telephony applications. It integrates switched-capacitor PGA, sigma-delta modulators, and digital filters into a single CMOS chip. The 'AR' designation indicates a plastic SOIC package, while 'S' denotes SSOP. The 'Z' suffix typically implies lead-free compliance in Analog Devices nomenclature, though verification against the specific datasheet revision is recommended.

Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source documentation. Engineers should consult Analog Devices for current equivalent products or cross-reference options based on pin compatibility and electrical specifications.