AD9238BSTZRL-40

Overview

The AD9238BSTZRL-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 with output error correction logic to guarantee no missing codes across the full operating temperature range. The ADC supports flexible analog input ranges from 1 V p-p to 2 V p-p and offers selectable offset binary or two's complement data formats.

Feature Summary

• Dual-channel 12-bit resolution with 40 MSPS sampling capability
• Integrated sample-and-hold amplifiers and voltage reference
• Differential input structure with 500 MHz bandwidth
• Built-in clock duty cycle stabilizer for performance maintenance

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 ordering suffix against the manufacturer's current documentation to confirm package type and reel specifications. Ensure compatibility with system power supplies and clock requirements before integration. Cross-reference the datasheet revision date to validate parameter accuracy for design implementation.

Selection Notes

Select this component when dual-channel synchronization and 12-bit precision are required at moderate speeds. Consider the 40 MSPS speed grade as a balance between power consumption and performance compared to the 65 MSPS variant. Evaluate thermal management requirements based on the 330 mW power dissipation per channel at maximum operation.

Part Context

The AD9238 series includes variants rated for 20 MSPS, 40 MSPS, and 65 MSPS. The -40 suffix denotes the 40 MSPS speed grade. The BSTZRL designation indicates a Pb-free LQFP package in tape and reel format. This part is pin-compatible with the 14-bit AD9248 series.

Replacement Considerations

The AD9238BSTZRL-20 and AD9238BSTZRL-65 are pin-compatible alternatives within the same family. Verify that the lower or higher sampling rates meet the application's dynamic performance needs without requiring schematic changes.