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FEATURES

DESCRIPTION

APPLICATIONS

Control

CLK

CONV

DIN_CFG

RESET

DDC316

ADCs

AGND

DGND

AVDD

DVDD

VREF

ItoV

IN1

IN2

IN3

IN4

IN16

ItoV

Serial

Interface

DVALID

DIN

DCLK

DOUT1

DOUT2

DOUT3

DOUT4

ItoV

ItoV

ItoV

DDC316

16-Channel, Current-Input

Analog-to-Digital Converter

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• SINGLE-CHIP SOLUTION TO MEASURE 16

The DDC316 is a 16-bit, 16-channel, current-input

LOW-LEVEL CURRENTS

analog-to-digital converter (ADC). It combines both

current-to-voltage

and

analog-to-digital

(A/D)

• INTEGRATING I-TO-V CONVERSION

conversion so that 16 separate low-level current

FRONT-END

output devices (such as photodiodes) can be directly

• PROGRAMMABLE FULL-SCALE : 3pC to 12pC

connected to its inputs and digitized.

• ADJUSTABLE SPEED:

For each of the 16 inputs, the DDC316 provides a

–

Data Rate Up To 100kSPS

dual-switched integrator front-end. This configuration

–

Integration Time Down To 10

µs

allows for continuous current integration: while one

integrator is being digitized by the on-chip ADC, the

• ANALOG SUPPLY: +5V

other is integrating the input current. Adjustable

• DIGITAL SUPPLY: +3.3V

integration times range from 10

µs to 1ms.

The DDC316 provides a serial interface of the output

data, either multiplexed onto a single data output pin

• CT SCANNER DAS

or parallel on four output pins. The output mode can

• PHOTODIODE SENSORS

be selected based on the available integration time.

• X-RAY DETECTION SYSTEMS

The DDC316 uses a +5V analog supply and a +3.3V

Protected by US Patent #5841310

digital supply. Operating over the temperature range

of 0°C to +70°C, the DDC316 is offered in a BGA-64

package.

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2008–2009, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.