DDC2256AZZF

The DDC2256AZZF from Texas Instruments is a high-performance 24-bit, 256-channel analog-to-digital converter (ADC) designed for direct measurement of low-level currents. This single-chip solution integrates current-to-voltage integration and A/D conversion, allowing 256 individual current output devices, such as photodiodes, to be connected directly and digitized simultaneously.

Key electrical specifications include a 24-bit resolution and a sampling rate of up to 17kSPS per channel. The device features a low power dissipation of as little as 1.7mW/channel and offers excellent integral linearity of ±0.025% of reading. It supports simultaneous sampling with no charge loss and includes an on-board temperature sensor.

The DDC2256AZZF utilizes an LVDS serial interface for data output. It is housed in a 323-NFBGA package and is designed for surface mount applications. The operating temperature range is from 0°C to 70°C, making it suitable for various industrial and medical imaging applications, particularly in computed tomography (CT) systems.

This ADC simplifies design complexity by including in-package bypass capacitors and a reference buffer, reducing PCB area. It is an ideal choice for applications requiring precise digitization of numerous low-level current signals.