AD9238BCPZRL-65

Overview

The AD9238BCPZRL-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 pipelined architecture with output error correction logic to ensure no missing codes across the full industrial temperature range (-40°C to +85°C). The device features dual high-performance sample-and-hold amplifiers (SHAs) and an integrated voltage reference. It operates on a single 3 V supply (2.7 V to 3.6 V) and consumes 600 mW at maximum speed. Key performance metrics include a Signal-to-Noise Ratio (SNR) of 70 dB and Spurious-Free Dynamic Range (SFDR) of 80.5 dBc at Nyquist frequencies.

Feature Summary

• Integrated dual 12-bit ADCs with exceptional channel isolation exceeding 85 dB.
• Differential input structure with 500 MHz, 3 dB bandwidth supporting flexible analog input ranges.
• Built-in clock duty cycle stabilizer maintains performance over wide variations in clock duty cycles.
• Flexible digital output options including offset binary or twos complement formats and data multiplexing.

Applications

• Ultrasound equipment
• Direct conversion or IF sampling receivers
• WB-CDMA, CDMA2000, WiMAX systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and reel specifications. Ensure compatibility with system power supply requirements and thermal management constraints for the LFCSP package. Cross-reference pin configurations with existing designs to validate signal integrity and ground connections.

Selection Notes

Select this component when high-speed, dual-channel digitization is required within a low-power constraint. The 65 MSPS speed grade offers optimal performance for wideband applications. Consider the integrated reference and SHA capabilities to simplify external circuit design compared to discrete solutions.

Part Context

This part belongs to the AD9238 family, which includes variants with different speed grades (20 MSPS, 40 MSPS, and 65 MSPS). It is pin-compatible with the AD9248, a 14-bit version of the same converter family. The BCPZRL designation indicates the 64-lead LFCSP package with reel packaging.

Replacement Considerations

AD9238BSTZRL-65

FAQ

What is the typical channel crosstalk performance of the AD9238?

The AD9238 provides exceptional crosstalk immunity, typically greater than 85 dB at an input frequency of 10 MHz.

Does the AD9238 guarantee no missing codes?

Yes, the device guarantees no missing codes over the full operating temperature range at up to 65 MSPS data rates due to its output error correction logic.

How does the clock duty cycle stabilizer function?

The duty cycle stabilizer compensates for wide variations in the clock duty cycle, allowing the converter to maintain excellent performance without requiring precise clock signals.