AD9226ASTZ

Overview

The AD9226ASTZ is a monolithic, single-supply, 12-bit, 65 MSPS analog-to-digital converter manufactured by Analog Devices Inc. It features an on-chip high-performance sample-and-hold amplifier and voltage reference. The device utilizes a multistage differential pipelined architecture with output error correction logic to ensure 12-bit accuracy at 65 MSPS data rates without missing codes across the full operating temperature range. It supports both straight binary and two's complement output formats and includes a clock duty cycle stabilizer. The component operates with a single 5 V analog supply and a separate 3 V or 5 V digital driver supply.

Feature Summary

• Patented on-chip sample-and-hold amplifier with a full power bandwidth of 750 MHz for superior IF undersampling performance.
• Integrated clock duty cycle stabilizer ensures conversion immunity to varying clock pulse widths.
• Flexible analog input structure allows configuration for either single-ended or differential inputs.
• Programmable internal voltage reference with options for external reference selection.

Applications

• Single-channel communication applications utilizing IF undersampling schemes.
• Imaging systems requiring direct interface capabilities.
• Direct IF conversion to digital processing architectures.

Procurement Notes

Verify the specific package option ST-48 (48-Lead Thin Plastic Quad Flatpack) when ordering the AD9226ASTZ variant. Confirm that the required temperature range covers -40°C to +85°C. Ensure system power supplies match the specified AVDD of 5 V and DRVDD of 3 V to 5 V. Check datasheet specifications for ESD sensitivity precautions during handling.

Selection Notes

Select the AD9226ASTZ for applications requiring high linearity and low distortion at 65 MSPS. Consider the 48-lead LQFP package for board space optimization compared to the SSOP version. Evaluate the need for the integrated reference versus an external precision source based on system noise requirements. Verify compatibility with the target logic family using the separate DRVDD supply pin.

Part Context

The AD9226 belongs to a family of complete 12-bit ADCs from Analog Devices. It is pin-compatible with the AD9220, AD9221, AD9223, AD9224, and AD9225 models, facilitating design upgrades or changes within the same product line. The ASTZ suffix specifically denotes the 48-lead LQFP package variant available in this series.

Replacement Considerations

The AD9226ARSZ is a pin-compatible alternative featuring the same electrical characteristics but housed in a 28-lead SSOP package. Other members of the AD922x family may serve as replacements if package footprint constraints allow for redesign.