AD9248BSTZ-40

Overview

The AD9248BSTZ-40 is a dual-channel, 14-bit analog-to-digital converter (ADC) from Analog Devices. It operates at a maximum sampling rate of 40 MSPS with a single 3 V supply. The device features a multistage differential pipelined architecture with output error correction logic to guarantee no missing codes across the full operating temperature range (-40°C to +85°C). Key electrical parameters include a typical Signal-to-Noise Ratio (SNR) of 73.1 dB and an Integral Nonlinearity (INL) of ±4.5 LSB. It supports flexible analog input ranges from 1 V p-p to 2 V p-p and includes integrated voltage references.

Feature Summary

• Dual high-performance sample-and-hold amplifiers with wide bandwidth differential inputs
• Integrated duty cycle stabilizer for maintaining performance under clock variations
• Multiplexed data output option enabling single-port operation from either channel
• Flexible analog input configuration supporting differential or single-ended applications

Applications

• Ultrasound equipment
• Direct conversion or IF sampling receivers
• WB-CDMA, CDMA2000, WiMAX systems
• Battery-powered instruments
• Low cost digital oscilloscopes

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and specific lot traceability upon receipt. Ensure proper ESD handling procedures are followed during storage and installation to maintain device reliability and prevent electrostatic discharge damage.

Selection Notes

Select this model when a 40 MSPS sampling rate is required for dual-channel 14-bit acquisition. Consider the AD9248BSTZ-65 for higher speed needs or the AD9248BSTZ-20 for lower power consumption. Evaluate thermal management requirements based on the 330 mW power dissipation at 40 MSPS and the selected package type.

Part Context

This component belongs to the AD9248 family, which offers speed grades of 20, 40, and 65 MSPS. It is pin-compatible with the AD9238, a 12-bit variant in the same series. The device is fabricated using an advanced CMOS process and is available in space-saving 64-lead LQFP or LFCSP packages suitable for industrial temperature applications.

Replacement Considerations

The AD9248BSTZ-20 and AD9248BSTZ-65 are pin-compatible alternatives within the same family. The AD9238 series serves as a 12-bit compatible substitute. Verify that any replacement meets the specific SNR, INL, and power dissipation requirements of the original design.