AD9226AST

Overview

The AD9226AST is a monolithic, single-supply, 12-bit analog-to-digital converter manufactured by Analog Devices Inc. It operates at a maximum sampling rate of 65 MSPS and utilizes a multistage differential pipelined architecture with output error correction logic to ensure no missing codes across the full operating temperature range. The device features an on-chip high-performance sample-and-hold amplifier (SHA) with a full power bandwidth of 750 MHz and a programmable voltage reference. It accepts differential or single-ended analog inputs and provides parallel digital outputs in straight binary or two's complement formats. The AD9226AST is housed in a 48-lead Thin Plastic Quad Flatpack (LQFP) package and supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Patented on-chip sample-and-hold amplifier designed for high-frequency signal acquisition up to 300 MHz input frequencies.
• Integrated clock duty cycle stabilizer ensures immunity to varying clock pulse widths during conversion cycles.
• Out-of-range (OTR) output bit indicates when the input signal exceeds the specified input range limits.
• Flexible analog input structure allows configuration for both differential and single-ended applications.

Applications

• Intermediate Frequency (IF) undersampling schemes in communication systems
• Single-channel communications applications requiring high-speed data acquisition
• Imaging systems interfacing with high-resolution analog sensors

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and temperature grade. Ensure that the digital driver supply voltage matches the target logic family requirements. Confirm availability of evaluation boards if hardware validation is required prior to production deployment.

Selection Notes

Select this component for designs requiring 12-bit resolution at speeds up to 65 MSPS with low power consumption. Consider the 48-lead LQFP package constraints for PCB layout. Evaluate the need for external versus internal voltage references based on system noise sensitivity and calibration requirements.

Part Context

The AD9226AST belongs to the AD922x series of high-speed ADCs from Analog Devices. It is pin-compatible with other models in the family such as the AD9220, AD9221, AD9223, AD9224, and AD9225, allowing for potential design flexibility within similar performance tiers.

Replacement Considerations

The AD9226AST is pin-compatible with the AD9220, AD9221, AD9223, AD9224, and AD9225. Verify specific performance parameters and pin assignments before substituting these models.

FAQ

What is the pipeline latency of the AD9226?

The AD9226 has a pipeline delay (latency) of 7 clock cycles.

How does the AD9226 handle clock duty cycle variations?

The device includes a patented Clock Duty Cycle Stabilizer that makes the conversion process immune to varying clock pulse widths.

Can the AD9226 operate with single-ended inputs?

Yes, the flexible input structure allows the user to select various input ranges and offsets, including single-ended applications, in addition to differential inputs.