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ADAS1126:  32-Channel, 24-Bit Current-to-Digital ADC

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The ADAS1126 is a 32-channel, current-to-digital, analog-to-digital converter (ADC). It contains 32 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 ADAS1126 uses the separate supply IOVDD to reduce the digital noise effect on the conversions.

The ADAS1126 is in a 10 mm × 10 mm, mini-BGA package. For more information on the ADAS1126, contact Analog Devices, Inc, at adas@analog.com.

  • 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)


  • 32-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: 12.5 mW/channel
  • LVDS self-clocked serial data interface
  • SPI configuration registers (daisy-chain)
  • On-board temperature sensor and reference buffer
  • See data sheet for additional features

Functional Block Diagram for ADAS1126

A short-form datasheet for this product is available for download from this web page. Complete documentation including detailed hardware and software guides are available upon completion of a Non-Disclosure Agreement (NDA) (pdf, 30,264 bytes). Send your completed forms by e-mail to ADAS@analog.com. Additional support is available from your Analog Devices local sales.

Please contact the ADC Development Group for additional technical information.

For additional ADI Healthcare Products and related information, please visit www.analog.com/healthcare


Наименование Тип контента Тип файлов
ADAS1126: 32-Channel, 24-Bit Current-to-Digital ADC Two Page Data Sheet (Rev SpC, 10/2013) (pdf, 61 kB) Технические описания 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) Технические статьи PDF
Semiconductors: The Heart of Next-Generation Medical Devices
Highly integrated chips are paving the way for smaller, more portable equipment.
(Design News, May 18, 2009)
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