The DDC118 is a 20-bit octal channel, current-input analog-to-digital (A/D) converter. It combines both current-to-voltage and A/D conversion so that eight low-level current output devices, such as photodiodes, can be directly connected to its inputs and digitized.

For each of the eight inputs, the DDC118 provides a dual-switched integrator front-end. This design allows for continuous current integration: while one integrator is being digitized by the onboard A/D converter, the other is integrating the input current. Adjustable full-scale ranges from 12pC to 350pC and adjustable integration times from 50µs to 1s allow currents from fAs to µAs to be measured with outstanding precision. Low-level linearity is ±0.5ppm of the full-scale range and noise is 5.2ppm of the full-scale range.

Two modes of operation are provided. In Low-Power mode, total power dissipation is only 13.5mW per channel with a maximum data rate of 2.5kSPS. High-Speed mode supports data rates up to 3.125kSPS with a corresponding dissipation of 18mW per channel.

The DDC118 has a serial interface designed for daisy-chaining in multi-device systems. Simply connect the output of one device to the input of the next to create the chain. Common clocking feeds all the devices in the chain so that the digital overhead in a multi-DDC118 system is minimal.

The DDC118 is a single-supply device using a +5V analog supply and supporting a +2.7V to +5.25V digital supply. Operating over the industrial temperature range of -40°C to 85°C, the DDC118 is offered in a QFN-48 package.

• SINGLE-CHIP SOLUTION TO DIRECTLY MEASURE EIGHT LOW-LEVEL CURRENTS
• HIGH PRECISION, TRUE INTEGRATING FUNCTION
• INTEGRAL LINEARITY: ±0.01% of Reading ±0.5ppm of FSR
• VERY LOW NOISE: 5.2ppm of FSR
• LOW POWER: 13.5mW/channel
• ADJUSTABLE DATA RATE: Up to 3.125kSPS
• PROGRAMMABLE FULL SCALE
• DAISY-CHAINABLE SERIAL INTERFACE
• APPLICATIONS
  • CT SCANNER DAS
  • PHOTODIODE SENSORS
  • INFRARED PYROMETER
  • LIQUID/GAS CHROMATOGRAPHY

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

• Number of input channels
• 8
• Resolution (Bits)
• 20
• Features
• Computed Tomography (CT)
• Operating temperature range (C)
• -40 to 85
• Interface type
• Serial
• Rating
• Catalog

DDC118的完整型号有：DDC118IRTCR、DDC118IRTCT，以下是这些产品的关键参数及官网采购报价：

DDC118IRTCR，工作温度：-40 to 85，封装：VQFN (RTC)-48，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-3-260C-168 HR，引脚镀层/焊球材料：NIPDAU，TI官网DDC118IRTCR的批量USD价格：29.04（1000+）

DDC118IRTCT，工作温度：-40 to 85，封装：VQFN (RTC)-48，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-3-260C-168 HR，引脚镀层/焊球材料：NIPDAU，TI官网DDC118IRTCT的批量USD价格：31.04（1000+）

DDC118 IBIS Model

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