AD73311ARSZ-REEL

Overview

The AD73311ARSZ-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 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. Electrical specifications include a typical ADC signal-to-noise ratio of 75 dB and a DAC SNR of 70 dB over the voiceband. It operates on a single supply ranging from +2.7 V to +5.5 V with a maximum power consumption of 50 mW at 2.7 V.

Feature Summary

• Integrates 16-bit ADC and 16-bit DAC channels with sigma-delta modulation architecture.
• Supports flexible serial port (SPORT) allowing up to 8 devices to be connected in cascade.
• Features programmable gain amplifiers with input ranges of 38 dB and output ranges of 21 dB.
• Includes an on-chip reference voltage and low group delay characteristics suitable for active control applications.

Applications

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

Procurement Notes

Verify the REEL suffix indicates tape-and-reel packaging rather than tube packaging when sourcing this specific variant. Confirm the 'A' grade designation ensures compliance with the specified -40°C to +85°C industrial temperature range. Check current availability status as older component lines may face discontinuation or limited stock constraints.

Selection Notes

Select this component for applications requiring integrated analog front-end processing without external discrete filters. Ensure the system clock frequency allows for the required DMCLK division to achieve the desired sample rate. Verify that the serial interface timing parameters align with the host DSP or microcontroller capabilities for reliable data transfer.

Part Context

This part belongs to the AD73311 family of analog front-end processors. The ARSZ suffix denotes the Shrink Small Outline Package (SSOP) with 20 leads and lead-free composition. It serves as a complete solution for speech and telephony applications, replacing multiple discrete components including amplifiers, filters, and converters.

Replacement Considerations

Direct pin-compatible replacements are not explicitly listed in the provided documentation. Evaluate other members of the AD73311 family, such as the AD73311AR (SOIC package), if package form factor changes are acceptable. Cross-reference with newer generation audio codecs if lower power or higher resolution is required.

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 is the on-chip reference voltage configured?

The on-chip reference can be set to a nominal value of 1.2 V or 2.4 V depending on the state of the Bit 5VEN (CRC:7) in the control register.

What is the typical signal-to-noise ratio for the ADC channel?

The typical Signal-to-Noise Ratio (SNR) for the ADC channel is 75 dB over the voiceband frequency range of 300 Hz to 3.4 kHz.