AD9251BCPZ-40

Overview

The AD9251BCPZ-40 is a dual-channel, 14-bit analog-to-digital converter (ADC) from Analog Devices Inc., operating at a maximum sampling rate of 40 MSPS. It utilizes a multistage differential pipeline architecture with output error correction logic to ensure no missing codes across the full temperature range. The device features a high-performance sample-and-hold circuit and an on-chip voltage reference. It operates from a single 1.8 V analog supply and supports digital output driver supplies ranging from 1.8 V to 3.3 V. Key performance metrics include a Signal-to-Noise Ratio (SNR) of 74.7 dBFS at a 9.7 MHz input frequency and a Spurious-Free Dynamic Range (SFDR) of 95 dBc under the same conditions. The component is housed in a 64-lead LFCSP package.

Feature Summary

• Integrates a patented sample-and-hold circuit designed for low power consumption and ease of use while maintaining excellent performance for input frequencies up to 200 MHz.
• Includes a standard serial port interface (SPI) that supports configuration of product features such as data output formatting, internal clock division, power-down modes, and timing adjustments.
• Offers flexible digital output options including offset binary, gray code, or twos complement formats, with support for both 1.8 V and 3.3 V CMOS logic levels.

Applications

• Communications systems including diversity radio, multimode digital receivers, GSM, EDGE, W-CDMA, LTE, CDMA2000, WiMAX, and TD-SCDMA.
• I/Q demodulation systems and smart antenna configurations.
• Battery-powered instruments, handheld scope meters, portable medical imaging, ultrasound, radar, and LIDAR devices.

Procurement Notes

Verify the specific suffix 'BCPZ' against the manufacturer's current ordering guide to confirm pinout compatibility and RoHS compliance status. Ensure the selected variant matches the required 40 MSPS sampling speed specification. Cross-reference the datasheet revision history for any updates to absolute maximum ratings or thermal characteristics before finalizing procurement documentation.

Selection Notes

Select this model when a dual-channel 14-bit resolution is required at speeds up to 40 MSPS with low power constraints. Consider the integrated voltage reference and sample-and-hold circuit if external components are to be minimized. Verify that the system clock requirements align with the available integer 1-to-8 input clock divider and optional duty cycle stabilizer features.

Part Context

The AD9251BCPZ-40 belongs to the AD9251 family of dual-channel ADCs, which also includes variants supporting 20 MSPS, 65 MSPS, and 80 MSPS rates. All members share the same 64-lead LFCSP footprint and are pin-compatible with other Analog Devices converters like the AD9268, AD9258, AD9231, and AD9204, facilitating migration paths between different resolutions and speeds.

Replacement Considerations

Direct replacements within the same package and pinout include the AD9251BCPZ-20, AD9251BCPZ-65, and AD9251BCPZ-80. These variants offer different maximum sampling rates but maintain identical functional interfaces and physical dimensions.