LTC1296BCSW#PBF

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LTC1296BCSW#PBF Data Acquisition - ADCs/DACs - Special Purpose

The LTC1296BCSW#PBF is an Integrated Digital Data Acquisition, A/D Conversion and D/A Conversion Device for use with general purpose microcontroller systems, featuring 8-bit A/D conversion, 12-bit D/A conversion and a 8-Channel Serialized Data Input. It is designed for use in analog control and data conversion applications.

Application Field

The LTC1296BCSW#PBF is suitable for low speed, medium resolution analog data acquisition and control applications, such as temperature sensing, strain gauges and wet/dry sensors. The integrated ADC and DAC provides 8-bit and 12-bit resolution respectively, and its 8-channel serialized data input allows multiple channels of data to be acquired simultaneously.

Additionally, the LTC1296BCSW#PBF can be used in consumer electronics applications like television receivers, digital cameras and audio equipment. The device can also be used in medical applications such as monitoring of patient vitals and testing of medical devices.

Working Principle

The LTC1296BCSW#PBF utilizes a resistor ladder input architecture to achieve 8-bit accuracy and 12-bit accuracy using a single-ended or differential input stage.

The resistors in the ladder network are connected in series and arranged in a binary step size for a single-ended input and differential two-step size for a differential input. The Analog-to-Digital Converter (ADC) section of the LTC1296BCSW#PBF amplifies the voltage difference across each series connection of the resistor ladder, allowing the successive approximation register (SAR) to compare the amplified (attenuated) voltage against a reference voltage and produce the digital conversion result.

The Digital-to-Analog Converter (DAC) section of the LTC1296BCSW#PBF uses a capacitor ladder network to convert a binary digital value into a corresponding analog voltage. The capacitors in the ladder network are arranged in a binary step size and are switched in and out of the network by the digital inputs. The overall network is discharge-controlled and allows the digital value to be converted into a corresponding analog voltage. The reference voltage is generated by an internal reference voltage source.

The 8-Channel Serialized Data Input feature of the LTC1296BCSW#PBF allows multiple channels of data to be received and presented in a serial stream. The serial input data is received by a 6-bit shift register and the converted digital data is then stored in an 8-bit random access memory (RAM) before being presented as an analog voltage.

The LTC1296BCSW#PBF provides a high level of integration, allowing it to be used for multiple data acquisition and control applications. Its simple architecture and high-performance design make it an ideal choice for applications requiring low-cost, medium resolution analog data conversion.

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