AD73311LARUZ-RL7

Overview

The AD73311LARUZ-RL7 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. It operates on a single supply ranging from +2.7V to +5.5V, with maximum power consumption of 50mW at 2.7V. The component utilizes a flexible serial port interface allowing cascading of up to eight devices.

Feature Summary

• 16-Bit ADC and DAC channels providing 75 dB SNR (ADC) and 70 dB SNR (DAC).
• Programmable gain amplifiers with 38 dB range for ADC and 21 dB range for DAC.
• Low group delay characteristics: 25 µs typical per ADC channel and 50 µs per DAC channel.
• Flexible Serial Port (SPORT) supporting cascade connections of up to 8 devices.

Applications

• Speech processing and enhancement systems.
• Cordless and personal communications equipment.
• Telephony interfaces and active sound/vibration control.
• General purpose analog I/O and data communications.

Procurement Notes

Verify the specific suffix 'RL7' against official documentation to confirm reel packaging specifications. Ensure compatibility with the required operating temperature range of -40°C to +85°C. Confirm that the SSOP-20 package dimensions align with the target PCB layout constraints.

Selection Notes

Select this component for applications requiring high-resolution audio or telephony signal processing with minimal external filtering. The integrated sigma-delta modulation reduces the need for complex antialias filters. Consider the 64 kS/s maximum sample rate when designing DSP interfaces to ensure timing synchronization via the SPORT.

Part Context

The AD73311 series serves as a complete front-end processor designed for speech and telephony applications. It replaces discrete amplifier and converter solutions by integrating PGA, ADC, DAC, and digital filters. The part is suitable for low bit-rate compression and recognition systems where low group delay is critical for feedback control loops.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify pinout and electrical specifications if considering alternative manufacturers for the AD73311 family.

FAQ

What is the maximum sample rate supported by the AD73311?

The AD73311 supports a maximum sample rate of 64 kS/s.

How does the AD73311 handle noise shaping?

It employs sigma-delta modulation techniques, including oversampling and noise shaping, to push quantization noise out of the band of interest, which is then removed by a digital decimation filter.

What is the typical group delay for the ADC channel?

The typical group delay for the ADC channel is 25 µs at a 64 kHz output sample rate.