AD7729AR

ADCs/DACs - Special Purpose Overview

The AD7729AR is a dual-channel, low-power CMOS device featuring two 15-bit Sigma-Delta analog-to-digital converters (ADCs) and a 10-bit auxiliary digital-to-analog converter (DAC). Operating on a single +3 V supply, it integrates on-chip signal conditioning including switched-capacitor filters and FIR digital filters. The ADCs provide a dynamic range of 67 dB and a signal-to-noise ratio of 64 dB at an output word rate of 270.83 kHz. The device includes an internal bandgap reference, offset calibration capabilities, and separate baseband and auxiliary serial ports for control and data transfer.

ADCs/DACs - Special Purpose Feature Summary

• Dual 15-bit Sigma-Delta ADCs with integrated FIR digital filters
• 10-bit Auxiliary DAC for functions such as Automatic Gain Control
• On-chip 1.3 V bandgap voltage reference
• Single +3 V power supply operation with low current consumption

ADCs/DACs - Special Purpose Applications

• GSM Base stations
• Pager systems

ADCs/DACs - Special Purpose Procurement Notes

Verify the package option upon ordering; the 'AR' suffix denotes the 28-lead Small Outline IC (SOIC). Confirm that the required operating temperature range matches the Industrial specification (-40°C to +105°C). Ensure ESD precautions are observed during handling due to the sensitivity of the CMOS structure.

ADCs/DACs - Special Purpose Selection Notes

Select this component when a dual-channel, low-power ADC solution is required for GSM or pager applications. It is suitable for designs needing integrated filtering and a control DAC within a single chip. Verify that the system can accommodate the 28-lead SOIC package dimensions and the specific serial interface timing requirements.

ADCs/DACs - Special Purpose Part Context

The AD7729AR belongs to the AD7729 family of dual Sigma-Delta ADCs. It is functionally identical to the AD7729ARU but utilizes a different package format. The 'A' grade specifies the industrial temperature range and performance characteristics defined in the datasheet specifications.

ADCs/DACs - Special Purpose Replacement Considerations

The AD7729ARU is a pin-compatible alternative using a Thin Shrink Small Outline (TSSOP) package. Other models in the series may offer different package options or temperature grades.