AD9221AR

Overview

The AD9221AR is a monolithic 12-bit analog-to-digital converter manufactured by Analog Devices Inc. It features a single 5 V supply and operates within a temperature range of -40°C to +85°C in a 28-lead SOIC package. The device supports a maximum sampling rate of 1.5 MSPS with a typical power dissipation of 59 mW. Key electrical specifications include an Integral Nonlinearity (INL) of ±0.5 LSB, Differential Nonlinearity (DNL) of ±0.3 LSB, and an input-referred noise of 0.09 LSB at a 2.5 V reference. Dynamic performance metrics include a Signal-to-Noise Ratio (SNR) of 70.2 dB and a Spurious-Free Dynamic Range (SFDR) of 86 dB.

Feature Summary

• Integrates a high-performance sample-and-hold amplifier and programmable voltage reference on a single chip.
• Utilizes a multistage differential pipelined architecture with digital output error correction logic for 12-bit accuracy.
• Offers flexible analog input configurations supporting both single-ended and differential modes.

Applications

• Imaging systems
• Communications equipment
• Medical instrumentation
• Data-acquisition systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and temperature grade. Confirm that the component meets all required environmental standards for the intended deployment environment before finalizing procurement decisions.

Selection Notes

Select this model when a low-power, single-supply 12-bit ADC is required for applications operating up to 1.5 MSPS. Consider alternative family members like the AD9223 or AD9220 if higher sampling rates are necessary, as they share identical pinouts and interface options while offering increased speed and power consumption.

Part Context

The AD9221AR belongs to the AD9221/AD9223/AD9220 product family from Analog Devices. These devices share the same CMOS pipelined architecture, interface options, and physical package dimensions. This commonality allows designers to upgrade or downgrade sampling rates and power consumption without redesigning the PCB layout or software interfaces.

Replacement Considerations

The AD9223AR and AD9220AR are direct pin-compatible replacements within the same family. They offer higher sampling rates of 3.0 MSPS and 10.0 MSPS respectively, but consume more power. Verify that the system clock and power budget can accommodate the increased requirements of these substitutes.