AD9874ABSTRL

Overview

The AD9874ABSTRL is a low-power intermediate-frequency (IF) digitizing integrated circuit designed for narrowband superheterodyne receiver architectures. It integrates all functional blocks required for IF-to-digital conversion, excluding the voltage-controlled oscillator. The device supports signal bandwidths up to 270 kHz with better than 90-dB dynamic range. Key electrical parameters include an operating frequency range of 10 MHz to 300 MHz, a sampling rate of 541.5 kS/s, and a resolution of 24 bits. Power consumption is rated at 79.5 mW with a supply current of 20 mA. The component features a 16 dB front-end attenuator and is housed in a 48-LQFP package.

Feature Summary

• Integrates complete IF-to-digital conversion subsystem functionality within a single chip
• Delivers wide dynamic range performance characteristic of superheterodyne receivers
• Maintains power efficiency and architectural simplicity comparable to direct-conversion designs
• Includes integrated 16 dB front-end attenuator for signal conditioning

Applications

• UHF wireless communication systems
• Mobile phone receiver architectures
• TETRA digital radio networks
• GSM and EDGE cellular infrastructure
• APCO-25 public safety radio systems

Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or certified partners. Confirm that the specific suffix ABSTRL matches the required 48-LQFP package variant. Check RoHS compliance status and moisture sensitivity level ratings prior to assembly. Ensure storage conditions adhere to specified humidity limits to prevent package damage during handling and soldering processes.

Selection Notes

Select this component when designing narrowband superheterodyne receivers requiring high dynamic range without excessive power consumption. It serves as a suitable alternative to complex traditional superheterodyne topologies by integrating necessary conversion stages. Consider the 10 MHz to 300 MHz input range and 270 kHz maximum bandwidth against specific application signal requirements before finalizing the design.

Part Context

The AD9874 represents a specialized RF IC category focusing on IF digitization subsystems. It bridges the performance gap between complex superheterodyne and simpler direct-conversion receivers. This part is distinct from general-purpose ADCs like the AD7472 due to its integrated RF front-end processing capabilities and specific tuning for wireless receiver architectures.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing system designs if considering alternative components from other manufacturers.