DDC3256 256-Channel, Current-Input Analog-To-Digital Converter

1 Features • Single-chip solution to directly measure 256 lowlevel currents simultaneously • Adjustable full-scale charge range up to 320 pC • Input current: 1 μA (maximum) • Adjustable speed with integration times as low as 50 μs (20 KSPS per channel) • Resolution: 24 bit • Low power diss

文件：614.07 Kbytes 页数：9 Pages

TI

德州仪器

DDC3256 256-Channel, Current-Input Analog-To-Digital Converter

1 Features • Single-chip solution to directly measure 256 lowlevel currents simultaneously • Adjustable full-scale charge range up to 320 pC • Input current: 1 μA (maximum) • Adjustable speed with integration times as low as 50 μs (20 KSPS per channel) • Resolution: 24 bit • Low power diss

文件：581.82 Kbytes 页数：9 Pages

TI

德州仪器

丝印：DDC3256；Package：NFBGA；DDC3256 256-Channel, Current-Input Analog-To-Digital Converter

1 Features • Single-chip solution to directly measure 256 lowlevel currents simultaneously • Adjustable full-scale charge range up to 320 pC • Input current: 1 μA (maximum) • Adjustable speed with integration times as low as 50 μs (20 KSPS per channel) • Resolution: 24 bit • Low power diss

文件：614.07 Kbytes 页数：9 Pages

TI

德州仪器

丝印：DDC3256；Package：NFBGA；DDC3256 256-Channel, Current-Input Analog-To-Digital Converter

1 Features • Single-chip solution to directly measure 256 lowlevel currents simultaneously • Adjustable full-scale charge range up to 320 pC • Input current: 1 μA (maximum) • Adjustable speed with integration times as low as 50 μs (20 KSPS per channel) • Resolution: 24 bit • Low power diss

文件：581.82 Kbytes 页数：9 Pages

TI

德州仪器

丝印：DDC3256；Package：NFBGA；DDC3256 256-Channel, Current-Input Analog-To-Digital Converter

1 Features • Single-chip solution to directly measure 256 lowlevel currents simultaneously • Adjustable full-scale charge range up to 320 pC • Input current: 1 μA (maximum) • Adjustable speed with integration times as low as 50 μs (20 KSPS per channel) • Resolution: 24 bit • Low power diss

文件：581.82 Kbytes 页数：9 Pages

TI

德州仪器

256/512 通道 20kSPS 电流输入模数转换器

DDC3256 是一款 24 位、256 通道电流输入模数 (A/D) 转换器。它结合了通过电流积分进行的电流电压转换和模数转换。\n\n光电二极管等多达 256 个独立的低电平电流输出器件可直接连接到其输入并并行（同时）进行数字化。\n\n对于全部 256 路输入中的每一路，该器件都有一个低噪声、低功耗积分器，专用于捕捉传感器中的全部电荷。积分时间可在 50µs 至 1.6ms 范围内调整，从而能够以出色的精度连续测量 fA 至 µA 级别的电流。积分器的输出通过片上低功耗 ADC 进行数字化，而转换得到的数字代码通过单个 LVDS 对进行传输，该 LVDS 对经过设计，可尽可能地减少高通道 • 单芯片解决方案，可同时直接测量 256 个低电平电流\n• 高达 320pC 的可调满量程电荷范围\n• 输入电流：1µA（最大值）\n• 速度可调，积分时间低至 50µs（每通道 20KSPS）\n• 分辨率：24 位\n• 低功率损耗：1.2mW/通道\n• 积分非线性：±0.025%（满量程范围的 ±1ppm，所有通道均处于活动状态）\n• 低噪声：0.26fCrms（320pC FSR 且传感器电容为 20pF）\n• 无电荷损耗\n• 片上温度传感器\n• 串行 LVDS 输出接口\n• 1.85-V 单电源\n• 封装内旁路电容器和基准缓冲器可减小 PCB 面积并降低设;

TI

德州仪器