DC996B-A

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DC996B-A is a high performance, low power, single-channel evaluation board for Analog to Digital Converters (ADCs) that is specifically designed for applications requiring low noise performance and low jitter. It features a 12-bit ADC supported by a wide range of programmable features such as a locally generated clock signal, adjustable gains, temperature range, software calibration, and the possibility to readout multiple channels.

The design of the DC996B-A is based on a low noise signal chain from the differential input signal through the analog and digital stages of the ADC. All programmable features are provided and accessible via a parallel bus interface. The evaluation board also features a jitter cleaning PLL circuit, which helps to reduce the jitter on the output signal. The DC996B-A supports up to 8 channels of differential inputs and outputs and can be used for a variety of high performance audio, data acquisition, and instrumentation applications.

The DC996B-A consists of two parts. The primary board contains the primary analog signal chain, the transistor array, and the ADC core. The secondary board contains the analog circuitry which is used to provide an adjustable gain, a local clock generator, a temperature sensor, and a calibration program that allows the ADC core to be adjusted to the user’s specific application.

The primary board is equipped with a low-noise amplifier that converts the signal from differential to single-ended. This signal is then applied to the ADC core. The transistor array provides a high input impedance to prevent loading of the input signal and a low output impedance to improve dynamic range and reduce jitter. The core of the ADC is a 12-bit monolithic converter featuring a pipelined architecture with linearized time-decimation for improved accuracy.

The secondary board consists of the local clock generator, temperature sensor, and adjustable gain amplifier. The clock generator provides a clean source of clock signal and is adjustable up to 40 MHz. The gain is adjustable from 6dB to 24dB via a potentiometer and is adjustable by changing the ratio of the gain amplifier’s feedback resistor. This allows the user to set the gain precisely for their specific application.

In addition to these internal features, the DC996B-A supports a software calibration program that can be used to compensate for system gain variations and ensure that the ADC performs accurately at all times. The temperature sensor is used to provide a temperature reading which can be used to monitor the environment or to control the gain of the ADC.

In conclusion, the DC996B-A is a highly versatile, low power evaluation board for Analog to Digital Converters. It provides a wide range of programmable features such as adjustable gains, clock generators, temperature sensors, and calibration programs. Additionally, it features a low noise signal chain for improved accuracy and noise performance. The DC996B-A is ideal for applications requiring high performance, low noise, and jitter-free signals.

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