AD7729ARZ-RL

ADCs/DACs - Special Purpose Overview

The AD7729ARZ-RL is a dual-channel, low-power CMOS device featuring two 15-bit Sigma-Delta analog-to-digital converters (ADCs) and an auxiliary 10-bit digital-to-analog converter (DAC). Operating on a single +3 V supply, the ADCs sample at 13 MSPS with a data output rate of 270.83 kHz. The device integrates on-chip FIR digital filters, a bandgap voltage reference, and offset calibration circuits. It supports differential or single-ended inputs via Baseband and Auxiliary Serial Ports.

ADCs/DACs - Special Purpose Feature Summary

• Dual 15-bit Sigma-Delta ADCs with 64 dB SNR and 13 MSPS input sampling rate
• Integrated 10-bit Auxiliary DAC for functions such as Automatic Gain Control
• On-chip FIR digital filters providing system-level filtering and adjacent channel rejection
• Internal autocalibration capability to remove DC offsets from I and Q channels

ADCs/DACs - Special Purpose Applications

• GSM Basestations
• Pagers

ADCs/DACs - Special Purpose Procurement Notes

Verify the package type against the specific suffix: 'AR' indicates a 28-lead Small Outline IC (SOIC), while 'ARU' denotes a Thin Shrink Small Outline (TSSOP). Confirm that the ordering suffix matches the required physical footprint for the design. Ensure compatibility with the -40°C to +105°C industrial temperature range specified for this variant.

ADCs/DACs - Special Purpose Selection Notes

Select this component for applications requiring high-resolution digitization of baseband signals with minimal external filtering. The integrated switched-capacitor front-end simplifies antialiasing requirements. Verify that the system can accommodate the 47 ms filter settling time after power-up or mode changes. Ensure the load resistance for the AUXDAC meets the minimum 10 kΩ specification.

ADCs/DACs - Special Purpose Part Context

This part belongs to the AD7729 family of dual Sigma-Delta ADCs. The 'ARZ' designation specifies the SOIC-28 package and lead-free construction. The '-RL' suffix indicates tape-and-reel packaging for automated assembly. Other variants in the series include the TSSOP package option (AD7729ARU).

ADCs/DACs - Special Purpose Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.