AD9237BCPZ-40

Overview

The AD9237BCPZ-40 is a monolithic, single 3 V supply, 12-bit analog-to-digital converter (ADC) from Analog Devices. It operates at a maximum sampling rate of 40 MSPS and features a high-performance sample-and-hold amplifier (SHA) with an integrated voltage reference. The device utilizes a multistage differential pipelined architecture with output error correction logic to ensure 12-bit accuracy without missing codes across the full operating temperature range. Key electrical specifications include a typical Signal-to-Noise Ratio (SNR) of 66.5 dBc at 2.4 MHz input frequency, a Spurious-Free Dynamic Range (SFDR) of 83.5 dBc, and a Differential Nonlinearity (DNL) of ±0.7 LSB. Power consumption is rated at 135 mW at the maximum conversion rate.

Feature Summary

• Patented sample-and-hold amplifier input maintains excellent performance for input frequencies beyond Nyquist and supports both single-ended and differential configurations.
• Flexible analog input span allows configuration from 1 V p-p to 4 V p-p by adjusting the internal reference mode.
• Integrated clock duty cycle stabilizer ensures consistent converter performance over a wide range of clock pulse widths.
• Two-step power-down capability provides distinct standby and full power-down modes to optimize energy efficiency.

Applications

• Ultrasound and medical imaging systems
• Battery-powered instruments and hand-held scope meters
• Low cost digital oscilloscopes
• Low power digital still cameras and copiers
• Low power communications equipment

Procurement Notes

Verify component authenticity through authorized distribution channels or direct manufacturer engagement. Confirm that the specific ordering suffix matches the required sampling speed variant. Ensure environmental compliance documentation aligns with project requirements. Review the latest datasheet revision for any updates to pin functions or absolute maximum ratings prior to finalizing procurement orders.

Selection Notes

Select this model when a 40 MSPS sampling rate is required within the AD9237 family. Consider the AD9237BCP-20 if lower power consumption at reduced speeds is prioritized, or the AD9237BCP-65 for higher bandwidth applications up to 65 MSPS. Evaluate the separate DRVDD supply requirement to accommodate 2.5 V or 3.3 V logic families in the target system design.

Part Context

This component belongs to the AD9237 family of low-power, 12-bit ADCs designed for imaging and medical ultrasound applications. The family shares a common 32-lead LFCSP package and core pipeline architecture, differentiated primarily by their maximum supported sampling rates. The AD9237BCPZ-40 specifically targets mid-range throughput requirements while maintaining ultralow power characteristics.

Replacement Considerations

Direct functional replacements within the same family include the AD9237BCP-20 and AD9237BCP-65, which share identical pinouts and architectural features but differ in maximum sampling speed. Verify that the alternative variant's power consumption and dynamic performance metrics meet the specific application constraints before substitution.

FAQ

How does the AD9237 handle clock jitter?

The device specifies an aperture uncertainty (jitter) of 0.5 ps rms. This low jitter specification helps maintain high Signal-to-Noise Ratio (SNR) performance even at higher input frequencies.

What is the pipeline delay latency of the converter?

The AD9237 has a fixed pipeline delay (latency) of 9 clock cycles. Data appears at the output pins nine cycles after the corresponding clock edge samples the analog input.

Can the analog input be configured for single-ended operation?

Yes, the patented SHA input can be configured for either single-ended or differential operation, providing flexibility for various signal source interfaces.