AD9248BSTZ-20

Overview

The AD9248BSTZ-20 is a dual-channel, 14-bit analog-to-digital converter (ADC) from Analog Devices. It operates at a maximum sampling rate of 20 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 to ensure no missing codes across the full operating temperature range. Key electrical parameters include a typical Signal-to-Noise Ratio (SNR) of 73.4 dB at 2.4 MHz input frequency, a Spurious-Free Dynamic Range (SFDR) of 86.0 dBc, and a power consumption of 180 mW. The component is housed in a 64-lead LQFP package.

Feature Summary

• Dual 14-bit ADCs with integrated voltage reference
• Differential input with 500 MHz bandwidth
• Clock duty cycle stabilizer for performance maintenance
• Multiplexed data output option

Applications

• Ultrasound equipment
• Direct conversion or IF sampling receivers
• Battery-powered instruments
• Hand-held scopemeters
• Low cost digital oscilloscopes

Procurement Notes

Verify the specific speed grade suffix matches the required sampling rate. Confirm the package type corresponds to the design footprint. Check RoHS compliance status against current manufacturing standards. Ensure the ordering code aligns with the desired data format options.

Selection Notes

Select this model for applications requiring 14-bit resolution at lower throughput speeds. Compare power dissipation requirements against higher speed variants like the -40 or -65 models. Consider the available input span flexibility when designing the front-end circuitry. Evaluate the need for shared versus independent reference modes based on system noise constraints.

Part Context

This component belongs to the AD9248 family of dual ADCs. It shares pin compatibility with the AD9238 series. The family offers speed grades ranging from 20 MSPS to 65 MSPS. All variants maintain similar architectural features and interface protocols.

Replacement Considerations

The AD9248BCPZ-20 is a pin-compatible alternative in a different package. Higher speed variants such as the AD9248BSTZ-40 or AD9248BSTZ-65 offer increased sampling rates but consume more power.