AD9874ABST

Overview

The AD9874ABST is an integrated IF digitizing subsystem designed for low-level input signals within the 10 MHz to 300 MHz frequency range. It features a bandwidth of up to 270 kHz and includes a 16 dB front-end attenuator. The device offers 24-bit resolution with a sampling rate of 541.5 kS/s. Power consumption is specified at 79.5 mW, drawing 20 mA of supply current. It is housed in a 48-pin LQFP package (7x7 mm) with 0.5 mm pin spacing. The component operates within a temperature range of -40 °C to 85 °C.

Feature Summary

• Integrates analog-to-digital conversion for intermediate frequency signals directly on-chip
• Includes a programmable 16 dB front-end attenuator for signal level management
• Provides high-resolution 24-bit digital output for precise signal processing
• Supports serial interface communication for configuration and control

Applications

• UHF radio systems
• TETRA trunked radio networks
• GSM and EDGE mobile communications
• APCO Project 25 public safety systems

Procurement Notes

Verify the specific suffix (e.g., ABST vs. ABSTRL) to confirm packaging type, as tray and tape-and-reel variants exist. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process. Check current availability status, as some distributors list this part as obsolete or out of stock. Ensure the operating voltage and interface timing match your system design before ordering.

Selection Notes

Select this component when a complete IF digitization solution is required for UHF and cellular bands. It is suitable for applications needing direct digital conversion of intermediate frequencies without external ADCs. Consider the power dissipation limits and thermal management capabilities of the LQFP-48 package. Verify that the 270 kHz bandwidth meets the signal requirements of the target communication standard.

Part Context

The AD9874 is part of Analog Devices' family of IF digitizing subsystems, serving as a system-on-chip solution for RF receivers. It simplifies receiver architecture by combining analog front-end functions with digital conversion. This integration reduces board space and component count compared to discrete solutions. The device targets multi-standard wireless infrastructure and portable radio equipment.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Users should consult official Analog Devices resources for cross-reference information.