CDI12100 – 12-Channel Sensor Analog Front End

The CDI12100 is a 12-channel Sensor Analog Front-End (AFE) ASIC designed and manufactured by Comport Data. Each of its 12 independent channels integrates a programmable-gain amplifier, a rectifier, and a filter. The device is optimized for signal conditioning of sensor outputs, particularly in applications requiring amplitude detection of AC-excited sensors.

The CDI12100 has 12 independent channels. Each channel contains a complete signal-processing chain consisting of an amplifier, rectifier, and filter, all integrated within a single compact IC.

The CDI12100 is available in a 48-pin, 6x6mm QFN (Quad Flat No-Lead) package. This compact surface-mount package is well-suited for space-constrained PCB designs.

The CDI12100 offers 14 programmable gain settings, spanning a range from 27 dB to 93 dB. This wide gain range allows the device to accommodate a broad variety of sensor signal amplitudes without requiring external gain-setting components.

The CDI12100 has a total power dissipation of less than 240 mW across all 12 channels, which equates to approximately 20 mW per channel. This makes it suitable for power-sensitive applications and designs where thermal management is a consideration.

The CDI12100’s filter frequency and bandwidth are adjustable using an external clock, which can range from 250 kHz to 4 MHz. This allows the filter characteristics to be tuned in the field to match the specific sensor excitation frequency and desired signal bandwidth.

Yes. The CDI12100 is flexible in its rectification architecture, it can operate using its built-in phase detector and rectifier, or it can accept an externally provided rectified signal. This makes it compatible with a variety of sensor excitation and demodulation schemes.

The CDI12100 operates from a power supply of up to ±10V, giving it compatibility with a range of system power rail configurations typical in industrial and sensor signal-processing applications.

The CDI12100 achieves very good channel-to-channel filter matching, with less than 1% variation between channels. This tight matching is important in multi-channel measurement systems where consistent frequency response across all channels is required for accurate relative measurements.

The CDI12100 provides a carrier output signal derived from the input clock divided by 128 (CLK/128). This output is intended to be used to drive the excitation source for AC-excited sensors, ensuring that the sensor drive signal and the internal demodulation reference are inherently phase-synchronized.