AD9251BCPZRL7-40

Overview

The AD9251BCPZRL7-40 is a dual-channel, 14-bit analog-to-digital converter (ADC) from Analog Devices Inc. It operates at a maximum sampling rate of 40 MSPS with a single 1.8 V analog supply and a separate 1.8 V to 3.3 V digital output driver supply. The device features a differential analog input span of 2 V p-p and an analog input bandwidth of 700 MHz. Key performance metrics include a Signal-to-Noise Ratio (SNR) of 74.5 dBFS at a 9.7 MHz input frequency and a Spurious-Free Dynamic Range (SFDR) of 95 dBc under the same conditions. Power consumption is specified at 73 mW per channel when operating at the maximum 40 MSPS rate.

Feature Summary

• Multistage differential pipeline architecture with integrated output error correction logic for high accuracy.
• Patented sample-and-hold circuit designed for low power operation and ease of use.
• On-chip voltage reference and programmable serial port interface (SPI) for configuration control.

Applications

• Diversity radio systems
• Multimode digital receivers
• I/Q demodulation systems

Procurement Notes

Verify the specific ordering suffix RL7 against official documentation to confirm reel packaging specifications. Ensure that the selected variant matches the required thermal and electrical parameters for the target application environment.

Selection Notes

Select this component for applications requiring dual-channel conversion with low power consumption. Verify compatibility with the system's clocking requirements and ensure the DRVDD level supports the receiving logic family.

Part Context

This part belongs to the AD9251 family, which includes variants supporting 20 MSPS, 65 MSPS, and 80 MSPS rates. All members share the same 64-lead LFCSP package and pinout, facilitating migration between different resolution and speed requirements within the same product line.

Replacement Considerations

Pin-compatible replacements within the same package include the AD9251BCPZ-20, AD9251BCPZ-65, and AD9251BCPZ-80. These alternatives offer different sampling rates while maintaining identical physical footprints.

FAQ

What data formats are supported by the AD9251?

The device supports offset binary, gray code, or twos complement data formats, which can be configured via the serial port interface.

Does the AD9251 include an internal voltage reference?

Yes, the ADC integrates an on-chip voltage reference and sample-and-hold circuit to simplify system design.

How does the device handle clock duty cycle variations?

An optional duty cycle stabilizer (DCS) is available to compensate for wide variations in the clock duty cycle while maintaining excellent overall ADC performance.