DDC1128 Texas instruments

DDC1128

Уточнить цену

DDC1128

Уточнить цену

СРАВНИТЬ

В СРАВНЕНИИ

Уточнить цену

Описание

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

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

Number of input channels	128
Resolution (Bits)	20
Features	Computed Tomography (CT)
Operating temperature range (°C)	0 to 70
Interface type	Serial
Rating	Catalog