ADAS1128 128 Channel, 24-Bit Current to Digital ADC

The ADAS1128 is a 128-channel, current-to-digital, analog-to-digital converter (ADC). It contains 128 low power, low noise, low input current integrators, simultaneous sample-and-holds, and two high speed, high resolution ADCs with configurable sampling rate and resolutions up to 24 bits.

All converted channel results are output on a single LVDS self-clocked serial interface, which reduces external hardware.

An SPI-compatible serial interface allows configuration of the ADC using the SDI input. The SDO output allows the user to daisy-chain several ADCs on a single, 3-wire bus. The ADAS1128 uses the separate supply IOVDD to reduce digital noise effect on the conversions.

The ADAS1128 is in a 10 mm × 10 mm, mini-BGA package.

Applications
  • Medical, industrial, and security CT scanner data acquisition
  • Photodiode sensors
  • Dosimetry and radiation therapy systems
  • Optical fiber power monitoring
  • X-ray detection systems
  • High channel-count data acquisition systems (current or
Features and Benefits
  • 128-channel, low level current-to-digital converter
  • Up to 24-bit resolution
  • Up to 19.7 kSPS (50.7 μs integration time)
  • Simultaneous sampling
  • No dead time, no loss of charge
  • Ultralow noise (down to 0.4 fC [2500e−])
  • User-adjustable full-scale range
  • INL: ±0.025% of reading ±0.75 ppm of FSR
  • See data sheet for additional information
  • Application Specific
    Analog to Digital Converters
    Data Sheets
    Documentnote
    ADAS1128: 128 Channel, 24-bit Current-to-Digital ADC Data Sheet (Rev. SpD)PDF 68 kB
    Order Information
    Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
    AD8450ASTZ Production80 ld LQFP (14x14mm)OTH 90-40 to 85C8.346.95Y
    AD8450ASTZ-RL Production80 ld LQFP (14x14mm)REEL 1000-40 to 85C8.346.95Y
    Evaluation Boards
    Part NumberDescriptionPriceRoHS
    AD8450-EVALZEvaluation Board for 80-Lead LQFP package260Y
    Reference Materials
    ADAS1128: 128 Channel, 24-bit Current-to-Digital ADC Data Sheet (Rev. SpD) adas1128
    MS-2210:高速ADC的电源设计 ad9861