AD9248BCPZRL-65

Overview

The AD9248BCPZRL-65 is a dual-channel, 14-bit analog-to-digital converter (ADC) from Analog Devices. It operates at a maximum sampling rate of 65 MSPS with a single 3 V supply. The device features dual high-performance sample-and-hold amplifiers and an integrated voltage reference. It utilizes a multistage differential pipelined architecture with output error correction logic to guarantee no missing codes across the full operating temperature range. Key electrical parameters include a typical Signal-to-Noise Ratio (SNR) of 71.6 dB and Spurious-Free Dynamic Range (SFDR) of 80.5 dBc at the Nyquist frequency for the -65 speed grade. Power consumption is specified at 600 mW at maximum data rates.

Feature Summary

• Dual 14-bit ADCs integrated on a single chip with differential input architecture
• Integrated duty cycle stabilizer maintains performance over wide clock variations
• Flexible analog input support for 1 V p-p to 2 V p-p ranges including single-ended applications
• Multiplexed data output option enables single-port operation from either channel

Applications

• Ultrasound equipment
• Direct conversion or IF sampling receivers
• WB-CDMA, CDMA2000, WiMAX systems
• Battery-powered instruments
• Hand-held scopemeters

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type and reel specifications. Ensure compatibility with industrial temperature ratings (-40°C to +85°C). Confirm that the 64-lead LFCSP package matches the target PCB footprint and thermal requirements. Cross-reference the -65 speed grade designation to ensure the 65 MSPS sampling rate aligns with system timing constraints.

Selection Notes

Select this component when dual-channel, high-speed digitization is required within a low-power constraint. The -65 speed grade is appropriate for applications demanding up to 65 MSPS sampling. Consider the integrated reference and duty cycle stabilizer if external components are limited. Verify that the 3 V supply voltage aligns with the system power architecture. Evaluate the pipelined latency of 7 cycles against real-time processing requirements.

Part Context

The AD9248 belongs to the AD9248 family of dual ADCs, which also includes variants with lower sampling speeds such as 20 MSPS and 40 MSPS. These variants share pinouts and architectural features but differ in power consumption and AC performance metrics. The device is fabricated using an advanced CMOS process and is available in both LQFP and LFCSP packages. It is designed to offer flexibility between power, cost, and performance for various signal processing applications.

Replacement Considerations

AD9248BSTZ-65: Pin-compatible lead-free version in LQFP package.

FAQ

What is the pipeline latency of the AD9248?

The AD9248 has a fixed pipeline delay (latency) of 7 cycles.

How does the AD9248 handle out-of-range signals?

Out-of-range signals indicate an overflow condition, which can be used with the most significant bit to determine low or high overflow via the OTR pins.

Can the AD9248 operate in single-ended mode?

Yes, the wide bandwidth differential SHA allows for user-selectable input ranges and offsets, including single-ended applications.