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Product details

Parameters

Number of input channels 128 Resolution (Bits) 20 Interface Serial Features Computed Tomography (CT) Operating temperature range (C) 0 to 70 Approx. price (US$) 174.24 | 1ku open-in-new Find other Computer tomography (CT) AFEs

Package | Pins | Size

NFBGA (ZKL) 192 81 mm² 9 x 9 open-in-new Find other Computer tomography (CT) AFEs

Features

  • Single-Chip Solution to Directly Measure
    128 Low-Level Currents
  • Proven High-Precision, True Integrating
    Architecture with 100% Charge Collection
  • Easy Upgrade for Existing DDC Family
    Applications
  • Low Power: 3 mW/channel at 3 kSPS
  • Extremely Linear:
    INL = ±0.025% of Reading ±1 ppm of FSR
  • Low Noise: 6.3 ppm of FSR
  • Adjustable Full-Scale Range
  • Adjustable Speed
    • Data Rates up to 6 kSPS with 20-bit
      Performance
    • Integration Times as low as 160 µs
  • Daisy-Chainable Serial Interface
  • In-Package Bypass Capacitors Simplify PCB
    Design Area and Design Complexity
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Description

The DDC1128 is a 20-bit, 128-channel, current-input analog-to-digital (A/D) converter. It combines both current-to-voltage and A/D conversion so that 128 separate low-level current output devices, such as photodiodes, can be directly connected to its inputs and digitized.

For each of the 128 inputs, the DDC1128 uses the proven dual switched integrator front-end. This configuration allows for continuous current integration: while one integrator is being digitized by the onboard A/D converter, the other is integrating the input current. This architecture provides both a stable offset and a loss-less collection of the input current. Adjustable integration times range from 160µs to 1s, allowing currents from fAs to µAs to be continuously measured with outstanding precision.

The DDC1128 has a serial interface designed for daisy-chaining in multi-device systems. Simply connect the output of one device to the input of the next to create the chain. Common clocking feeds all the devices in the chain so that the digital overhead in a multi-DDC1128 system is minimal.

The DDC1128 operates from a +5 V analog supply and a 2.7 V to 3.6 V digital supply, it is specified from 0°C to 70°C operating temperature and it is available in a 9 × 9 mm2 192-ball BGA, which includes on board bypass capacitors to help minimize the external component requirements and further reduce board space.

To request a full data sheet or other design resources: request DDC1128

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More Information

Full data sheet and other design resources are available under NDA. Request now

Technical documentation

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Type Title Date
* Datasheet DDC1128 128-Channel, Current-Input Analog-to-Digital Converter datasheet (Rev. A) May 27, 2016
User guides DDC1128 EVM Intro User's Guide Mar. 19, 2014

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$499.00
Description

The DDC1128EVM evaluation module  (EVM)  is  an  evaluation  kit  for  evaluating  the DDC1128,  a  128-channel,  current  input,  20-bit analog-to-digital (A/D) converter. The EVM consists of two DDC1128 devices, a USB device for interfacing to a PC, an FPGA for device communication (...)

Features
  • Full Characterization and evaluation of DDC1128
  • Option for custom sensor boards
  • Flexible supply configurations
  • FPGA based device configuration and data capture
  • USB 2.0 interface

Design tools & simulation

SIMULATION MODELS Download
SLAM217.ZIP (25 KB) - IBIS Model

CAD/CAE symbols

Package Pins Download
NFBGA (ZKL) 192 View options

Ordering & quality

Support & training

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