DDC112 - 双路电流输入 20 模数转换器

DDC112是TI德州仪器公司的一款光学AFE产品，DDC112是双路电流输入 20 模数转换器，本站介绍了DDC112的封装应用图解、特点和优点、功能等，并给出了与DDC112相关的TI元器件型号供参考。

DDC112 - 双路电流输入 20 模数转换器 - 光学AFE - 光学感应 - 德州仪器

产品描述

The DDC112 is a dual input, wide dynamic range, charge-digitizing analog-to-digital (A/D) converter with 20-bit resolution. Low-level current output devices, such as photosensors, can be directly connected to its inputs. Charge integration is continuous as each input uses two integrators; while one is being digitized, the other is integrating.

For each of its two inputs, the DDC112 combines current-to-voltage conversion, continuous integration, programmable full-scale range, A/D conversion, and digital filtering to achieve a precision, wide dynamic range digital result. In addition to the internal programmable full-scale ranges, external integrating capacitors allow an additional user-settable full-scale range of up to 1000pC.

To provide single-supply operation, the internal A/D converter utilizes a differential input, with the positive input tied to VREF. When the integration capacitor is reset at the beginning of each integration cycle, the capacitor charges to VREF. This charge is removed in proportion to the input current. At the end of the integration cycle, the remaining voltage is compared to VREF.

The high-speed serial shift register which holds the result of the last conversion can be configured to allow multiple DDC112 units to be cascaded, minimizing interconnections. The DDC112 is available in a SO-28 or TQFP-32 package and is offered in two performance grades.

产品特性

MONOLITHIC CHARGE MEASUREMENT ADC
DIGITAL FILTER NOISE REDUCTION: 3.2ppm, rms
INTEGRAL LINEARITY: ±0.005% Reading ±0.5ppm FSR
HIGH PRECISION,TRUE INTEGRATING FUNCTION
PROGRAMMABLE FULL SCALE
SINGLE SUPPLY
CASCADABLE OUTPUT
APPLICATIONS
- DIRECT PHOTOSENSOR DIGITIZATION
- CT SCANNER DAS
- INFRARED PYROMETER
- PRECISION PROCESS CONTROL
- LIQUID/GAS CHROMATOGRAPHY
- BLOOD ANALYSIS

Protected by US Patent #5841310 All trademarks are the property of their respective owners.

下面可能是您感兴趣的TI德州仪器公司光学AFE元器件

TI公司产品现货专家，订购TI公司产品不限最低起订量，TI芯片大陆现货即时发货，香港库存3-5天发货，海外库存7-10天发货

寻找全球TI代理商现货货源 - TI公司（德州仪器）电子元件在线订购