AD9231BCPZ-65

Overview

The AD9231BCPZ-65 is a dual-channel, 12-bit analog-to-digital converter (ADC) from Analog Devices Inc., operating at a maximum sampling rate of 65 MSPS. It utilizes a multistage differential pipeline architecture with output error correction logic to ensure no missing codes across the full temperature range. The device features a patented sample-and-hold circuit and an on-chip voltage reference, supporting a 2 V p-p differential analog input span. It operates from a single 1.8 V analog supply and a separate digital driver supply ranging from 1.7 V to 3.6 V. Key performance metrics include a Signal-to-Noise Ratio (SNR) of 71.4 dBFS at a 9.7 MHz input frequency and a Spurious-Free Dynamic Range (SFDR) of 93 dBc under the same conditions. The component is housed in a 64-lead RoHS-compliant LFCSP package.

Feature Summary

• Multistage differential pipeline architecture with output error correction for high accuracy
• Patented sample-and-hold circuit maintaining performance up to 200 MHz input frequencies
• Integrated on-chip voltage reference and programmable serial port interface (SPI)
• Flexible digital output formatting including offset binary, gray code, or twos complement

Applications

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

Procurement Notes

Verify the specific suffix '65' corresponds to the 65 MSPS speed grade when sourcing. Confirm that the LFCSP-64 package requires soldering the exposed paddle to the PCB ground plane for proper thermal dissipation and mechanical strength. Ensure the design supports the required 1.8 V analog supply and compatible digital logic levels for the DRVDD pin.

Selection Notes

Select this model for applications requiring dual-channel conversion at 65 MSPS with 12-bit resolution. Compare against the AD9231-40 for lower power needs or the AD9231-80 for higher bandwidth requirements. Consider the pin compatibility with other AD9231 variants if migrating between different resolution or speed grades within the same family.

Part Context

This component belongs to the AD9231 series, which includes variants operating at 20 MSPS, 40 MSPS, 65 MSPS, and 80 MSPS. All variants share the same 64-lead LFCSP package and pinout, facilitating easy migration between different performance levels. The series is designed for low-cost, low-power applications requiring high dynamic range and flexibility in digital output configuration.

Replacement Considerations

The AD9231BCPZ-40 offers similar functionality at a 40 MSPS rate. The AD9231BCPZ-80 provides an 80 MSPS sampling rate. These parts are pin-compatible with the AD9231BCPZ-65 and other members of the AD9231 family, allowing for straightforward substitution if system timing constraints permit.