AD73311LARS-REEL

Overview

The AD73311LARS-REEL 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 package. The device operates on a single +3 V supply with maximum power consumption of 33 mW at 2.7 V. Key electrical specifications include a typical ADC signal-to-noise ratio (SNR) of 76 dB and a DAC SNR of 77 dB over the voiceband. It supports programmable input and output sample rates up to a maximum of 64 kS/s. The component features a flexible serial port interface allowing cascading of up to eight devices and includes an on-chip voltage reference for simplified system design.

Feature Summary

• Integrates 16-bit ADC and 16-bit DAC channels with 76 dB (ADC) and 77 dB (DAC) typical SNR.
• Supports programmable sampling rates up to 64 kS/s with low group delay characteristics.
• Features programmable gain amplifiers (PGA) for both input and output signal conditioning.
• Includes an on-chip bandgap voltage reference and operates from a single 2.7 V to 3.3 V supply.

Applications

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

Procurement Notes

Verify that the 'REEL' suffix in the part number indicates tape-and-reel packaging rather than tube packaging when reviewing distributor listings. Confirm the specific package variant (RS-20 Shrink Small Outline Package) matches the board layout requirements. Ensure the industrial temperature range (-40°C to +105°C) aligns with the operational environment constraints of the target application.

Selection Notes

Select this component for applications requiring high-resolution audio conversion with minimal external components due to the integrated reference and filters. Consider the 64 kS/s maximum sample rate limit when designing for wideband signals. Evaluate the serial port timing requirements against the host DSP or microcontroller capabilities. The differential output configuration requires appropriate load resistance and capacitance limits to maintain signal integrity.

Part Context

The AD73311L belongs to the Analog Devices family of general-purpose analog front-end processors designed for speech and telephony applications. The 'ARU' designation typically refers to the TSSOP package, while 'ARS' denotes the SSOP package; the 'REEL' suffix specifies the manufacturing packaging format. This model serves as a complete solution for converting analog voice signals to digital data and vice versa without requiring external anti-aliasing or reconstruction filters.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Engineers should consult Analog Devices for current equivalent products or updated series replacements if the AD73311L is discontinued or unavailable.