AD9251BCPZRL7-65

Overview

The AD9251BCPZRL7-65 is a dual-channel, 14-bit analog-to-digital converter (ADC) from Analog Devices Inc., operating at a maximum sampling rate of 65 MSPS. It utilizes a multistage differential pipeline architecture with integrated output error correction logic to ensure no missing codes across the full temperature range. The device requires a single 1.8 V analog supply and supports digital driver supplies between 1.7 V and 3.6 V. Key performance metrics include a Signal-to-Noise Ratio (SNR) of 74.3 dBFS at a 9.7 MHz input frequency and a Spurious-Free Dynamic Range (SFDR) of 93 dBc under the same conditions. Power consumption is rated at 73 mW per channel at the maximum sampling rate.

Feature Summary

• Integrates high-performance sample-and-hold circuitry and an on-chip voltage reference to minimize external component requirements.
• Features a standard serial port interface for flexible configuration of data formatting, clock division, and power-down modes.
• Supports multiple digital output formats including offset binary, gray code, and twos complement via programmable settings.

Applications

• Diversity radio systems
• Multimode digital receivers
• I/Q demodulation systems
• Battery-powered instruments

Procurement Notes

Verify the specific reel packaging designation associated with the RL7 suffix against the manufacturer's current ordering guide to confirm tape and reel specifications. Ensure that the selected variant matches the required industrial temperature range and package lead finish standards for the intended assembly process.

Selection Notes

Select this model when a dual-channel 14-bit resolution is required at sampling rates up to 65 MSPS. Consider the separate DRVDD supply capability if interfacing with 3.3 V logic families is necessary alongside the 1.8 V analog core. Evaluate the pin compatibility with other members of the AD9251 family if migration paths for different resolutions or speeds are planned.

Part Context

This component belongs to the AD9251 series of low-power, high-speed ADCs designed for communications and instrumentation applications. The series offers various speed grades ranging from 20 MSPS to 80 MSPS within a compact 64-lead LFCSP package. The AD9251BCPZRL7-65 specifically targets designs requiring optimized power efficiency without compromising dynamic performance at moderate sampling frequencies.

Replacement Considerations

The AD9251BCPZ-65 serves as a direct functional equivalent in terms of electrical specifications and pinout. Verify that any substitute part maintains the same RoHS compliance status and thermal characteristics to ensure seamless integration into existing board layouts.

FAQ

What is the maximum differential analog input voltage span?

The AD9251BCPZRL7-65 accepts a differential analog input span of 2 V p-p when using the internal 1.0 V reference.

How does the device handle clock duty cycle variations?

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

Is the device guaranteed to have no missing codes?

Yes, the datasheet guarantees no missing codes over the full operating temperature range for all specified speed grades.