AD9248 IC Chip

AD9248（14-Bit, 20 MSPS/40 MSPS/65 MSPS Dual A/D Converter）

Introduction

The AD9248 is a dual 14-bit, 20 MSPS/40 MSPS/65 MSPS analog-to-digital converter (ADC) with dual high-performance sample-and-hold amplifiers (SHAs) and an integrated voltage reference. It employs a multistage differential pipelined architecture with error correction logic, ensuring 14-bit accuracy and no missing codes across the full temperature range at data rates up to 65 MSPS. The wide-bandwidth, differential SHA allows for various user-selectable input ranges and offsets, suitable for applications such as multiplexed systems switching full-scale voltage levels in successive channels and sampling inputs beyond the Nyquist rate.

Dual single-ended clock inputs control internal conversion cycles, and a duty cycle stabilizer compensates for wide variations in the clock duty cycle, maintaining excellent performance. The digital output data is available in either straight binary or twos complement format. Out-of-range signals indicate an overflow condition, providing information about low or high overflow using the most significant bit.

Features

• Integrated dual 14-bit ADC
• Single 3 V supply operation (2.7 V to 3.6 V)
• SNR=71.6 dB (to Nyquist, AD9248-65)
• SFDR = 80.5 dBc (to Nyquist, AD9248-65)
• Low power: 300 mW/channel at 65 MSPS
• Differential input with 500 MHz, 3 dB bandwidth
• Exceptional crosstalk immunity> 85 dB
• Flexible analog input: 1 V p-p to 2 V p-p range
• Offset binary or twos complement data format
• Clock duty cycle stabilizer
• Output datamux option

Appearance