AD9248BCPZ-20

Overview

The AD9248BCPZ-20 is a dual-channel, 14-bit analog-to-digital converter (ADC) operating at a maximum sampling rate of 20 MSPS. It features dual high-performance sample-and-hold amplifiers and an integrated voltage reference within a multistage differential pipelined architecture. The device guarantees no missing codes across the full industrial temperature range (-40°C to +85°C). It operates on a single 3 V supply (2.7 V to 3.6 V) with a typical power consumption of 180 mW per channel at the maximum data rate. The ADC supports flexible analog input ranges from 1 V p-p to 2 V p-p and offers selectable offset binary or two's complement digital output formats.

Feature Summary

• Dual 14-bit converters with integrated voltage reference and high-performance sample-and-hold amplifiers
• Differential input structure with wide bandwidth and exceptional crosstalk immunity exceeding 85 dB
• Built-in clock duty cycle stabilizer to maintain performance under varying clock conditions
• Configurable data output format supporting both offset binary and two's complement modes

Applications

• Ultrasound equipment
• Direct conversion or IF sampling receivers for WB-CDMA, CDMA2000, and WiMAX
• Battery-powered instruments
• Hand-held scopemeters
• Low-cost digital oscilloscopes

Procurement Notes

Verify the specific speed grade suffix in the part number to confirm the 20 MSPS rating. Ensure the package type matches the design requirements, as the component is available in 64-lead LQFP or LFCSP configurations. Confirm that the ordering suffix corresponds to the desired tape and reel or tray packaging options provided by the manufacturer.

Selection Notes

Select this model when a lower sampling rate than the 40 or 65 MSPS variants is sufficient for the application. The 20 MSPS version offers reduced power consumption compared to higher-speed grades while maintaining 14-bit resolution. Consider the pin-compatible AD9238 if 12-bit resolution is acceptable for cost reduction. Ensure the system clock meets the timing requirements for the selected data format.

Part Context

The AD9248 series includes speed grades of 20 MSPS, 40 MSPS, and 65 MSPS, allowing flexibility between power, cost, and performance. The AD9248BCPZ-20 represents the entry-level speed option in this family. It shares the same pinout and architectural features as the faster variants, facilitating easy upgrades or downgrades in design without PCB modifications.

Replacement Considerations

The AD9238 is a pin-compatible alternative offering 12-bit resolution. Higher speed alternatives include the AD9248BCPZ-40 and AD9248BCPZ-65.