AD9238BCPZ-40

Overview

The AD9238BCPZ-40 is a dual-channel, 12-bit analog-to-digital converter (ADC) from Analog Devices. It operates at a maximum sampling rate of 40 MSPS with a single 3 V supply. The device features dual high-performance sample-and-hold amplifiers and an integrated voltage reference. It utilizes a multistage differential pipelined architecture to ensure no missing codes across the full operating temperature range. Key electrical specifications include a typical Signal-to-Noise Ratio (SNR) of 70.2 dB at 9.7 MHz input frequency and a Spurious-Free Dynamic Range (SFDR) of 84.0 dBc under the same conditions. Power consumption is rated at 330 mW.

Feature Summary

• Dual-channel 12-bit ADC architecture with integrated voltage reference
• Multistage differential pipelined design ensuring no missing codes
• Duty cycle stabilizer for maintaining performance with varying clock signals
• Flexible analog input supporting differential or single-ended configurations

Applications

• Ultrasound equipment
• Direct conversion or IF sampling receivers
• WB-CDMA, CDMA2000, WiMAX systems
• Battery-powered instruments
• Hand-held scopemeters

Procurement Notes

Verify the specific speed grade suffix matches the required sampling rate. Confirm package type corresponds to LFCSP-64. Check RoHS compliance status. Ensure ordering documentation aligns with Analog Devices official part numbering conventions. Validate environmental specifications against application requirements.

Selection Notes

Select this component when dual-channel acquisition at 40 MSPS is required. Consider power consumption limits relative to the 330 mW rating. Evaluate input signal ranges against the 1 V p-p to 2 V p-p capability. Assess clock jitter sensitivity given the aperture uncertainty specification. Verify compatibility with digital output formats.

Part Context

The AD9238 series includes variants optimized for different speeds: 20 MSPS, 40 MSPS, and 65 MSPS. The BCPZ suffix indicates the LFCSP-64 package. This model sits between the lower-speed AD9238-20 and the higher-speed AD9238-65 in terms of power and performance characteristics within the family.

Replacement Considerations

Pin-compatible with the AD9248, which offers 14-bit resolution at similar speeds. Direct substitutes within the AD9238 family include the AD9238BSTZ-40 (LQFP package). Verify pinout and thermal requirements when switching packages.