AD7729ARZ

ADCs/DACs - Special Purpose Overview

The AD7729ARZ is a monolithic 3 V CMOS dual-channel baseband codec featuring two 15-bit sigma-delta ADCs and a 10-bit auxiliary DAC. It operates with a 13 MHz master clock, providing an output word 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 for I and Q channels, with a signal range defined by the internal 1.3 V reference. Power consumption varies by mode, with typical analog current around 4.2 mA when ADCs are active. The component is housed in a 28-lead SOIC package.

ADCs/DACs - Special Purpose Feature Summary

• Dual 15-bit Sigma-Delta ADCs with integrated FIR digital filters
• 10-bit Auxiliary DAC for AGC/AFC applications
• On-chip 1.3 V bandgap voltage reference
• Baseband and Auxiliary serial ports (BSPORT/ASPORT)
• Receive offset calibration with autocalibration capability

ADCs/DACs - Special Purpose Applications

• GSM Base stations
• Pagers

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'R' indicates reel packaging if ordering as AD7729AR. Confirm the 'A' grade meets the -40°C to +105°C industrial temperature range. Check RoHS compliance status against current manufacturing revisions. Ensure ESD precautions are observed during handling due to sensitivity.

ADCs/DACs - Special Purpose Selection Notes

Select this component for low-power baseband processing requiring simultaneous I/Q digitization. The 15-bit resolution and 64 dB SNR suit narrowband communication systems. Verify that the 270.83 kHz output data rate aligns with downstream processor capabilities. Consider the 28-lead SOIC package dimensions for PCB layout constraints.

ADCs/DACs - Special Purpose Part Context

The AD7729 belongs to Analog Devices' baseband codec family designed for wireless infrastructure. It combines analog front-end filtering with high-resolution conversion. The ARZ variant specifically denotes the industrial temperature grade and lead-free SOIC packaging. It serves as a complete receive path solution for GSM and similar protocols.

ADCs/DACs - Special Purpose Replacement Considerations

No direct public substitute part numbers are confirmed in the provided documentation. Evaluate pin-compatible alternatives only if they match the 28-lead SOIC form factor and 3V supply requirements.