AD9248BSTZ-65

Overview

The AD9248BSTZ-65 is a dual-channel, 14-bit analog-to-digital converter (ADC) from Analog Devices Inc. It operates at a maximum sampling rate of 65 MSPS with a single 3 V supply. The device features a differential input architecture with a 500 MHz bandwidth and an integrated voltage reference. Key performance metrics include a Signal-to-Noise Ratio (SNR) of 71.6 dB and a Spurious-Free Dynamic Range (SFDR) of 80.5 dBc at full scale. Power consumption is specified at 600 mW for the complete device at maximum speed. It utilizes a pipelined structure with output error correction logic to guarantee no missing codes across the industrial temperature range.

Feature Summary

• Dual high-performance sample-and-hold amplifiers with wide differential input bandwidth
• Integrated duty cycle stabilizer to maintain performance under varying clock conditions
• Flexible data output formats including offset binary and two's complement options
• Multiplexed data output capability enabling single-port digital interface operation

Applications

• Ultrasound imaging equipment
• Direct conversion or IF sampling receivers
• Wireless communication systems such as WB-CDMA and WiMAX
• Battery-powered test instruments and handheld oscilloscopes

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type and speed grade. Ensure that the required operating temperature range aligns with the industrial specifications provided in the official documentation. Cross-reference pin configurations if replacing existing designs to ensure compatibility with the 64-lead LQFP footprint.

Selection Notes

Select this component when dual-channel acquisition is required within a compact form factor. The 65 MSPS speed grade offers higher throughput compared to lower variants but results in increased power dissipation. Consider the available input span options and the necessity for internal versus external voltage references during the design phase to optimize system noise performance.

Part Context

This model belongs to the AD9248 family, which includes variants operating at 20 MSPS and 40 MSPS. The BSTZ suffix indicates a lead-free, RoHS-compliant version housed in a 64-lead LQFP package. It shares architectural similarities with the AD9238 but provides enhanced 14-bit resolution. The device is designed for applications demanding high linearity and low power consumption in portable or space-constrained environments.

Replacement Considerations

The AD9248BCPZ-65 serves as a pin-compatible alternative utilizing an LFCSP package. Designers must account for thermal management differences between the LQFP and LFCSP footprints when substituting components. Verify that the board layout supports the specific package requirements of the replacement part.