AD9226ARSZ

Overview

The AD9226ARSZ is a monolithic, single-supply, 12-bit, 65 MSPS analog-to-digital converter manufactured by Analog Devices Inc. It features a multistage differential pipelined architecture with patented input stage and output error correction logic to ensure no missing codes over the full operating temperature range. The device includes an on-chip high-performance sample-and-hold amplifier (SHA) with a full power bandwidth of 750 MHz and a programmable voltage reference. It operates with a single 5 V analog supply (AVDD: 4.75 V to 5.25 V) and a separate digital driver supply (DRVDD: 2.85 V to 5.25 V). Key performance metrics include a Signal-to-Noise Ratio (SNR) of 69 dB at fIN = 31 MHz, Spurious-Free Dynamic Range (SFDR) of 85 dB at fIN = 31 MHz, and low-power dissipation of 475 mW. Differential Nonlinearity (DNL) and Integral Nonlinearity (INL) are specified at ±0.6 LSB typical.

Feature Summary

• Patented on-chip sample-and-hold amplifier supporting both single-ended and differential inputs with a full power bandwidth of 750 MHz.
• Integrated clock duty cycle stabilizer makes conversion immune to varying clock pulsewidths.
• On-board programmable reference allows selection between internal or external voltage references for system design flexibility.
• Out-of-range (OTR) output bit indicates when the input signal exceeds the ADC's input range.

Applications

• Single-channel communication applications utilizing IF undersampling schemes.
• Imaging systems requiring flexible analog input interfacing.
• Data-intensive applications demanding high-speed acquisition with low power consumption.

Procurement Notes

Verify the specific ordering suffix 'ARSZ' corresponds to the 28-Lead Shrink Small Outline Package (SSOP) with a temperature range of -40°C to +85°C. Confirm RoHS compliance status as indicated in the manufacturer's documentation. Ensure that the digital driver supply voltage matches the target logic family requirements before integration into the final system design.

Selection Notes

Select this component when a 12-bit resolution at 65 MSPS is required within a single-supply 5 V architecture. Consider the pin-compatible alternatives such as the AD9220, AD9221, AD9223, AD9224, and AD9225 if different sampling rates or resolutions better suit the application constraints while maintaining board layout compatibility.

Part Context

The AD9226 belongs to a family of high-speed monolithic ADCs from Analog Devices designed for cost-effective CMOS implementation. It shares architectural similarities with the AD9220 through AD9225 series, offering pin compatibility to simplify upgrades or redesigns. The device is characterized for industrial temperature ranges and utilizes a pipeline structure optimized for high linearity and dynamic range performance.

Replacement Considerations

The AD9220, AD9221, AD9223, AD9224, and AD9225 are officially documented as pin-compatible replacements. Verify that the specific sampling rate and resolution differences of these alternative models align with the system requirements before substitution.

FAQ

How does the AD9226 handle clock duty cycle variations?

The device incorporates a Clock Duty Cycle Stabilizer feature that makes the conversion process immune to varying clock pulsewidths, ensuring consistent performance regardless of duty cycle fluctuations.

What is the function of the OTR pin?

The Out-of-Range (OTR) output bit signals when the analog input signal exceeds the defined input range of the AD9226, which can be used in conjunction with the most significant bit to determine overflow conditions.

Can the AD9226 operate with single-ended inputs?

Yes, the patented on-chip sample-and-hold amplifier allows the user to configure the device for either differential or single-ended inputs, providing flexibility for various interface requirements.