DDC1128 128-Channel, Current-Input Analog-to-Digital Converter | TI.com

DDC1128
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
128-Channel, Current-Input Analog-to-Digital Converter

 

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  • DDC264  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.   The DDC264 only offers 64 channels instead of 128
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More Information

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

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

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

Parametrics

Compare all products in Computer tomography (CT) AFEs Email Download to Excel
Part number Order Number of input channels Resolution (Bits) Interface Features Operating temperature range (C) Package size: mm2:W x L (PKG) Package Group Approx. price (US$)
DDC1128 Order now 128     20     Serial     Computed Tomography (CT)     0 to 70     192NFBGA: 81 mm2: 9 x 9 (NFBGA | 192)     NFBGA | 192     198.00 | 1ku    
DDC112 Order now 2     20     Serial     Computed Tomography (CT)     -40 to 85
0 to 70    
28SOIC: 184 mm2: 10.3 x 17.9 (SOIC | 28)
32TQFP: 81 mm2: 9 x 9 (TQFP | 32)    
SOIC | 28
TQFP | 32    
12.60 | 1ku    
DDC114 Order now 4     20     Serial     Computed Tomography (CT)     -40 to 85     48VQFN: 49 mm2: 7 x 7 (VQFN | 48)     VQFN | 48     17.85 | 1ku    
DDC118 Samples not available 8     20     Serial     Computed Tomography (CT)     -40 to 85     48VQFN: 49 mm2: 7 x 7 (VQFN | 48)     VQFN | 48     30.00 | 1ku    
DDC2256A Samples not available 256     24     LVDS/Serial     Computed Tomography (CT)     0 to 70     323NFBGA: 224 mm2: 14 x 16 (NFBGA | 323)     NFBGA | 323     299.00 | 1ku    
DDC232 Samples not available 32     20     Serial     Computed Tomography (CT)     0 to 70     64NFBGA: 64 mm2: 8 x 8 (NFBGA | 64)     NFBGA | 64     70.00 | 1ku    
DDC264 Order now 64     20     Serial     Computed Tomography (CT)     0 to 70     100NFBGA: 81 mm2: 9 x 9 (NFBGA | 100)     NFBGA | 100     99.00 | 1ku    
DDC316 Samples not available 16     16     Serial     Computed Tomography (CT)     0 to 70     64NFBGA: 64 mm2: 8 x 8 (NFBGA | 64)     NFBGA | 64     48.25 | 1ku