FEATURES
· SINGLE-CHIP SOLUTION TO MEASURE 16
LOW-LEVEL CURRENTS
· INTEGRATING I-TO-V CONVERSION
FRONT-END
· PROGRAMMABLE FULL-SCALE : 3pC to 12pC
· ADJUSTABLE SPEED:
– Data Rate Up To 100kSPS
– Integration Time Down To 10ms
· ANALOG SUPPLY: +5V
· DIGITAL SUPPLY: +3.3V

APPLICATIONS
· CT SCANNER DAS
· PHOTODIODE SENSORS
· X-RAY DETECTION SYSTEMS

DESCRIPTION
The DDC316 is a 16-bit, 16-channel, current-input
analog-to-digital converter (ADC). It combines both
current-to-voltage and analog-to-digital (A/D)
conversion so that 16 separate low-level current
output devices (such as photodiodes) can be directly connected to its inputs and digitized.
For each of the 16 inputs, the DDC316 provides a
dual-switched integrator front-end. This configuration
allows for continuous current integration: while one
integrator is being digitized by the on-chip ADC, the
other is integrating the input current. Adjustable integration times range from 10ms to 1ms.
The DDC316 provides a serial interface of the output
data, either multiplexed onto a single data output pin or parallel on four output pins. The output mode can
be selected based on the available integration time.
The DDC316 uses a +5V analog supply and a +3.3V
digital supply. Operating over the temperature range
of 0°C to +70°C, the DDC316 is offered in a BGA-64
package.