AD73311LAR

Overview

The AD73311LAR is a low-cost, low-power CMOS general-purpose analog front-end processor manufactured by Analog Devices. It integrates a 16-bit analog-to-digital converter (ADC) and a 16-bit digital-to-analog converter (DAC) within a single 20-lead SOIC package. The device operates on a single +3 V supply with maximum power consumption of 33 mW at 2.7 V. It supports programmable input and output sample rates up to 64 kS/s. Key performance metrics include a typical signal-to-noise ratio of 76 dB for the ADC and 77 dB for the DAC over voiceband bandwidths.

Feature Summary

• Integrates 16-bit ADC and 16-bit DAC channels with on-chip reference voltage
• Supports programmable sampling rates up to 64 kS/s via serial interface
• Features programmable gain amplifiers with 38 dB range for ADC and 21 dB range for DAC
• Low group delay characteristics suitable for active control applications

Applications

• Speech processing and enhancement
• Telephony systems
• Cordless and personal communications devices
• Active control of sound and vibration

Procurement Notes

Verify the specific package variant when ordering, as the 'R' suffix denotes the 20-lead Small Outline IC (SOIC). Confirm temperature grade requirements, as this model is rated for industrial operation from -40°C to +105°C. Ensure compatibility with host DSP interfaces regarding serial clock timing and frame sync signals before integration.

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 25 µs typical group delay for real-time processing constraints. Verify that the host system can provide the necessary master clock frequencies (e.g., 16.384 MHz) to achieve desired sample rates.

Part Context

The AD73311LAR belongs to the AD7331L family of analog front-ends. Other variants in this series include the AD73311LARS (SSOP package) and AD73311LARU (TSSOP package), which share identical electrical specifications but differ in physical footprint and thermal characteristics.

Replacement Considerations

Direct pin-compatible replacements within the same family include the AD73311LARS and AD73311LARU. Cross-family replacements require verification of pinout compatibility, package dimensions, and electrical parameter alignment with the original design requirements.