AD7729ARUZ

ADCs/DACs - Special Purpose Overview

The AD7729ARUZ is a dual-channel, low-power CMOS device featuring two 15-bit Sigma-Delta ADCs and a 10-bit auxiliary DAC. Operating on a single +3 V supply, it integrates an internal bandgap reference and digital FIR filters with a 3 dB cutoff at 96 kHz. The I/Q receive channels sample at 13 MSPS, delivering data at 270.83 kHz with a minimum SNR of 64 dB. It includes on-chip offset calibration and serial interfaces (BSPORT/ASPORT) for control. Housed in a 28-lead TSSOP package, it supports industrial temperatures from -40°C to +105°C.

ADCs/DACs - Special Purpose Feature Summary

• Dual 15-bit Sigma-Delta ADCs with integrated 288-tap FIR digital filters
• Internal 1.3 V bandgap voltage reference requiring external 0.1 µF capacitors
• 10-bit Auxiliary DAC with binary coding and up to 540 kHz update rate
• On-chip offset calibration for DC error correction in both I and Q channels

ADCs/DACs - Special Purpose Applications

• GSM Base Station Receivers
• Pager Receiver Circuits

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'RU' confirms the TSSOP-28 package variant. Confirm the 'A' grade designation matches the required -40°C to +105°C operating temperature range. Check current lifecycle status as older Analog Devices components may be subject to discontinuation notices.

ADCs/DACs - Special Purpose Selection Notes

Select this component for applications requiring high-resolution I/Q demodulation with minimal external filtering due to the integrated switched-capacitor front-end. Ensure the system clock is derived from a 13 MHz source to achieve the specified 270.83 kHz output word rate. Verify that the 10-bit auxiliary DAC meets the load requirements of connected AGC circuits.

ADCs/DACs - Special Purpose Part Context

This part belongs to the AD7729 family of baseband codecs. The AD7729ARU denotes the Thin Shrink Small Outline (TSSOP) package option, while the AD7729AR utilizes the standard SOIC package. Both variants share identical electrical specifications and pinouts.

ADCs/DACs - Special Purpose Replacement Considerations

The AD7729AR is the SOIC package equivalent. No direct modern replacements are listed in the provided documentation; legacy cross-referencing should verify pin compatibility and register maps.