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ADAS1127:  64-Channel, 24-Bit Current-to-Digital ADC

Product Details

Product Status:Recommended for New Designs

The ADAS1127 is a 64-channel, current-to-digital, analog-to-digital converter (ADC). It contains 64 low power, low noise, low input current integrators, simultaneous sample-and-holds, and a 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 ADAS1127 uses the separate supply IOVDD to reduce the digital noise effect on the conversions.

The ADAS1127 is in a 10 mm × 10 mm, mini-BGA package. For more information on the ADAS1127, contact Analog Devices, Inc, at

  • 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 voltage inputs)


  • 64-channel, low level current-to-digital converter
  • Up to 24-bit resolution
  • Up to 19.7 kSPS (50.7 μs integration time)
  • Simultaneous sampling
  • Ultralow noise (down to 0.4 fC [2500e−])
  • User-adjustable full-scale range
  • INL: ±0.025% of reading ±0.75 ppm of FSR
  • Very low power dissipation: 6.25 mW/channel
  • LVDS self-clocked serial data interface
  • SPI configuration registers (daisy-chain)
  • On-board temperature sensor and reference buffer
  • 10 mm × 10 mm, mini-BGA package

Functional Block Diagram for ADAS1127


Title Content Type File Type
ADAS1127: 64-Channel, 24-Bit Current-to-Digital ADC (Rev SpA, 09/2010) (pdf, 55 kB) Data Sheets PDF
ADAS1128: 28-channel, 24-bit, 20 kSPS Current-to-Digital Converter
The ADAS1128 is a 128-channel, analog-current-to-digital converter. It contains 128 low-power, low-noise, low-input current integrators, simultaneous sample-holds and two high-speed, high-resolution ADCs with configurable sampling rate and resolution up to 24 bits. The primary application is CT Scanners.
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MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles PDF
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Evaluation Kits & Symbols & Footprints

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