AD9238BCPZ-65

Overview

The AD9238BCPZ-65 is a dual-channel, 12-bit analog-to-digital converter (ADC) from Analog Devices. It operates at a maximum sampling rate of 65 MSPS with a single 3 V supply. The device features differential inputs with a 500 MHz bandwidth and an integrated voltage reference. Key electrical parameters include a Signal-to-Noise Ratio (SNR) of 70 dB and Spurious-Free Dynamic Range (SFDR) of 80.5 dBc at full scale. Power consumption is 600 mW at the maximum speed grade. It supports offset binary or two's complement data formats and includes a clock duty cycle stabilizer.

Feature Summary

• Dual high-performance sample-and-hold amplifiers with integrated voltage reference
• Multistage differential pipelined architecture with output error correction logic
• Clock duty cycle stabilizer for maintaining performance across wide duty cycles
• Flexible analog input range supporting 1 V p-p to 2 V p-p

Applications

• Ultrasound equipment
• Direct conversion or IF sampling receivers
• WB-CDMA, CDMA2000, WiMAX systems
• Battery-powered instruments
• Low cost digital oscilloscopes

Procurement Notes

Verify the specific speed grade suffix (-65) matches the required 65 MSPS sampling rate. Confirm the package type (LFCSP vs LQFP) aligns with the PCB footprint design. Ensure power supply decoupling meets the datasheet requirements for AVDD and DRVDD to maintain specified SNR and SFDR performance levels.

Selection Notes

Select this component when dual-channel acquisition at 12-bit resolution and 65 MSPS is required. Consider the 600 mW power dissipation for thermal management in compact designs. Evaluate the 500 MHz analog input bandwidth against the highest frequency components of the signal being digitized to ensure adequate fidelity.

Part Context

This part belongs to the AD9238 family, which offers speed grades of 20 MSPS, 40 MSPS, and 65 MSPS. It is pin-compatible with the AD9248, a 14-bit variant. The -65 suffix denotes the highest speed grade within this series, optimized for applications requiring maximum throughput while maintaining low power consumption relative to competitors.

Replacement Considerations

AD9238BSTZ-65: Pin-compatible alternative in LQFP package.