Digital X-Ray

The AD7960 is an 18-bit, 5 MSPS charge redistribution successive approximation (SAR), analog-to-digital converter (ADC). The SAR architecture allows unmatched performance both in noise and in linearity. The AD7960 contains a low power, high speed, 18-bit sampling ADC, an internal conversion clock and an internal reference buffer. On the CNV± edge, the AD7960 samples the voltage difference between the IN+ and IN− pins. The voltages on these pins swing in opposite phase between 0 V and 4.096 V/5 V. The reference voltage is applied to the part externally. All conversion results are available on a single LVDS self-clocked or echo-clocked serial interface.

The AD7960 is available in a 32-lead LFCSP (QFN) with operation specified from −40°C to +85°C.

APPLICATIONS

• Digital imaging systems 
   Digital X-rays 
   Computed tomography 
   IR cameras
•  MRI gradient control
• High speed data acquisition
• Spectroscopy
• Test equipment

The AD7626 is a 16-bit, 10 MSPS, charge redistribution successive approximation register (SAR) based architecture analog-to-digital converter (ADC). SAR architecture allows unmatched performance both in noise (91.5 dB SNR) and in linearity (±0.45 LSB INL). The AD7626 contains a high speed, 16-bit sampling ADC, an internal conversion clock, and an internal buffered reference. On the CNV edge, it samples the voltage difference between the IN+ and IN− pins. The voltages on these pins swing in opposite phase between 0 V and REF. The 4.096 V reference voltage, REF, can be generated internally or applied externally.

All converted results are available on a single low voltage differential signaling (LVDS) self clocked or echoed clock serial interface, reducing external hardware connections.

The AD7626 is housed in a 32-lead, 5 mm × 5 mm LFCSP with operation specified from −40°C to +85°C.

Applications

• Digital imaging systems
  – Digital X-ray
  – Digital MRI
  – CCD and IR cameras
• High speed data acquisition
• High dynamic range telecommunications receivers
• Spectrum analysis
• Test equipment

The AD8488 is a 128-channel analog front end designed for use in high performance digital X-ray systems. The analog channels consist of an integrator followed by a gain selectable single-ended to low impedance differential output. The analog channel converts the charge acquired by X-ray or photodiode detectors to a voltage. The channels are composed of CMOS transistors, using typical high input impedance CMOS gates. The integrators generate charge dependent voltages using a range of selectable capacitance values that accommodate a broad range of input charge values. The integrators are followed by single-ended input to differential output voltage amplifiers where offset and low frequency noise voltages are subtracted from the input voltages. A 128:1 channel differential MUX follows the buffers and drives the analog output buffer. Switch drivers and certain digital timing functions are included, and all are mounted on a 255-lead BGA substrate. Charge conversion for all 128 channels is simultaneous followed by a sequential voltage output read of the channels using a 7-bit address code. The sequence occurs twice, sampling all 128 channels. Logic control inputs, CS_A and CS_B select the lower and upper 64-blocks of channel addresses.

The AD8488 is packaged in a 17 mm × 17 mm 255-lead RoHS compliant ball grid array (BGA). The operating temperature range is 0°C to 85°C ambient. 

Applications

• High performance digital X-ray systems
• Medical X-ray
• Security (baggage scanner) systems

The ADAS1256 is a 256-channel, charge-to-digital analog-front end (AFE) mounted on high density flex. It can be directly mounted on a digital X-ray panel. It is suitable for a large variety of digital X-ray and photodiode array applications and it works with both hole sensing and electron sensing panels. ADAS1256 allows up to 22us line time, so it can be used in dynamic imaging panels in addition to still image panels. It contains 256 low power, low noise, low input current integrators with correlated double sampling stages; along with integrated true 16 bit high speed ADCs.

All converted channel results are output on a single LVDS self-clocked serial interface that significantly reduces external hardware. An SPI-compatible serial interface allows configuration of the AFE using SDI input. The SDO output allows the user to daisy chain several AFEs on a single 3-wire bus.

An integrated AFE timing sequencer controls the sampling activity of the analog front end (AFE). The sequencer is programmed via the SPI port and is timed by a single clock, ACLK.

APPLICATIONS

• Digital X-ray panel
• Photodiode sensors array
• CT Scanner
• High channel count data acquisition systems (current or voltage input)
• TFT panel readout

The ADIS16201 is a complete, dual-axis acceleration and inclination angle measurement system available in a single compact package enabled by the Analog Devices iSensor^™ integration. By enhancing the Analog Devices iMEMS^® sensor technology with an embedded signal processing solution, the ADIS16201 provides factory calibrated and tunable digital sensor data in a convenient format that can be accessed using a serial peripheral interface (SPI). The SPI interface provides access to measurements for dual-axis linear acceleration, dual-axis linear inclination angle, temperature, power supply, and one auxiliary analog input. Easy access to calibrated digital sensor data provides developers with a system-ready device, reducing development time, cost, and program risk.

Unique characteristics of the end system are accommodated easily through several built-in features, such as a single command in-system offset calibration, along with convenient sample rate and bandwidth control.

The ADIS16201 offers the following embedded features, which eliminate the need for external circuitry and provide a simplified system interface:

• Configurable alarm function
• Auxiliary 12-bit ADC
• Auxiliary 12-bit DAC
• Configurable digital I/O port
• Digital self-test function

The ADIS16201 offers two power management features for managing system-level power dissipation: low power mode and a configurable shutdown feature.

The ADIS16201 is available in a 9.2 mm × 9.2 mm × 3.9 mm laminate-based land grid array (LGA) package with a temperature range of −40°C to +125°C.

APPLICATIONS

• Platform control, stabilization, and leveling
• Tilt sensing, inclinometers
• Motion/position measurement
• Monitor/alarm devices (security, medical, safety)