AD9237BCPZ-65

Overview

The AD9237BCPZ-65 is a monolithic, single 3 V supply, 12-bit analog-to-digital converter (ADC) operating at a maximum sample rate of 65 MSPS. It utilizes a multistage differential pipelined architecture with output error correction logic to ensure no missing codes over the full operating temperature range. The device features an ultralow power consumption of 190 mW at 65 MSPS and includes a high-performance sample-and-hold amplifier (SHA) with a 500 MHz bandwidth. Power scaling allows for reduced operation at lower speeds, consuming 85 mW at 20 MSPS and 135 mW at 40 MSPS. It operates from a single 3 V analog supply and supports separate digital driver supplies for 2.5 V or 3.3 V logic families.

Feature Summary

• Patented SHA input maintains excellent performance for input frequencies beyond Nyquist and supports both single-ended and differential configurations.
• Flexible analog input span ranging from 1 V p-p to 4 V p-p, optimized for selectable reference modes.
• Two-step power-down capability provides distinct standby and full power-down modes to minimize energy usage during idle periods.
• Integrated clock duty cycle stabilizer ensures consistent converter performance across a wide range of clock pulse widths.

Applications

• Ultrasound and medical imaging systems
• Battery-powered instruments
• Hand-held scope meters
• Low cost digital oscilloscopes
• Low power communications

Procurement Notes

Verify the specific suffix BCPZ-65 against the manufacturer's current ordering guide to confirm package type and lead-free status. Ensure the design accommodates the 32-lead LFCSP thermal requirements by soldering the exposed paddle to the ground plane. Confirm that the DRVDD supply voltage matches the target logic family, as it is independent of the AVDD supply.

Selection Notes

Select this component when a 12-bit resolution and up to 65 MSPS sampling rate are required within a low-power constraint. Consider the AD9237BCPZ-40 or AD9237BCPZ-20 if lower data rates suffice, as they offer reduced power consumption of 135 mW and 85 mW respectively. Verify that the system can support the 9-cycle pipeline latency inherent to the pipelined architecture.

Part Context

This part belongs to the AD9237 family of 3 V low-power ADCs from Analog Devices. The family shares identical pinouts and architectural features but differs in maximum conversion rates. The -65 variant represents the highest speed option in the series, designed for applications requiring higher bandwidth while maintaining the small form factor and power efficiency of the broader product line.

Replacement Considerations

The AD9237BCPZ-40 and AD9237BCPZ-20 are direct functional substitutes within the same package, offering lower maximum sample rates of 40 MSPS and 20 MSPS respectively. These alternatives provide significant power savings if the system does not require the full 65 MSPS throughput.