AD9231BCPZ-20

Overview

The AD9231BCPZ-20 is a dual-channel, 12-bit analog-to-digital converter (ADC) operating at a maximum sampling rate of 20 MSPS. It utilizes a multistage differential pipeline architecture with output error correction logic to ensure no missing codes across the full operating temperature range. The device features a patented sample-and-hold circuit and an on-chip voltage reference, supporting input frequencies up to 200 MHz. It operates from a single 1.8 V analog supply and accommodates digital driver supplies from 1.8 V to 3.3 V. Key performance metrics include a Signal-to-Noise Ratio (SNR) of 71.3 dBFS at a 9.7 MHz input frequency and a Spurious-Free Dynamic Range (SFDR) of 95 dBc under the same conditions.

Feature Summary

• Multistage differential pipeline architecture with output error correction logic for high accuracy
• Patented sample-and-hold circuit designed for low cost and ease of use
• On-chip voltage reference and built-in selectable digital test pattern generation
• Programmable clock and data alignment with optional duty cycle stabilizer

Applications

• Diversity radio systems
• Multimode digital receivers
• I/Q demodulation systems
• Smart antenna systems
• Portable medical imaging

Procurement Notes

Verify the specific suffix against official documentation to confirm the exact speed grade and package variant. Ensure that the ordering information matches the required sampling rate and interface specifications for the intended application design.

Selection Notes

Select this component when a dual-channel, 12-bit resolution is required at lower sampling rates. Consider the power consumption differences between 1.8 V and 3.3 V digital supplies during system design. Evaluate the need for external versus internal voltage references based on noise requirements.

Part Context

This part belongs to the AD9231 family, which includes variants supporting 40 MSPS, 65 MSPS, and 80 MSPS sampling rates. All variants share the same 64-lead LFCSP package and pinout, facilitating migration between different speed grades within the same product line.

Replacement Considerations

The AD9231BCPZ-40, AD9231BCPZ-65, and AD9231BCPZ-80 are pin-compatible alternatives offering higher sampling rates. Verify if the increased bandwidth or speed meets the system requirements without necessitating layout changes.

FAQ

What is the maximum input frequency supported by the AD9231?

The AD9231 maintains excellent performance for input frequencies up to 200 MHz.

Does the AD9231 guarantee no missing codes?

Yes, the device guarantees no missing codes over the full operating temperature range due to its output error correction logic.

What data formats are supported by the digital outputs?

The digital output data can be presented in offset binary, gray code, or twos complement format.