Analog Devices ADAS1134 Product Info

• 128-channel, low level current-to-digital converter
• Up to 24-bit resolution
• Up to 22.6 kSPS (44.2 µs integration time)
• Simultaneous sampling
• No dead time, no loss of charge
• Ultralow noise down to 0.32 fC rms (2000 e⁻)
• User adjustable full-scale range
• INL: ±0.05% of reading of ±1.0 ppm FSR_I
• Low power dissipation: 2.25 mW per channel
• LVDS self clocked serial data interface
• Serial peripheral interface (SPI) configuration registers (daisy-chain capability)
• On-board temperature sensor and reference buffer
• 10 mm × 10 mm, 242-ball CSP_BGA package
• See data sheet for additional features

The ADAS1134 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, low voltage differential signaling (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 ADAS1134 uses IOVDD, a separate supply, to reduce digital noise effect on the conversions.

The ADAS1134 is available in a 10 mm × 10 mm, 242-ball CSP_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 voltage inputs)