LTC1861CS8#PBF

Number of A/D Converters:	1
Base Part Number:	LTC1861
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Operating Temperature:	0°C ~ 70°C
Features:	--
Voltage - Supply, Digital:	5V
Voltage - Supply, Analog:	5V
Reference Type:	External
Architecture:	SAR
Series:	--
Ratio - S/H:ADC:	1:1
Configuration:	S/H-ADC
Data Interface:	SPI
Input Type:	Differential, Single Ended
Number of Inputs:	2
Sampling Rate (Per Second):	250k
Number of Bits:	12
Part Status:	Active
Packaging:	Tube

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Data Acquisition - Analog to Digital Converters (ADC)

The LTC1861CS8#PBF is an advanced analog-to-digital converter (ADC) that offers an exceptional combination of performance, design flexibility, and cost efficiency. It is well-suited for applications such as motor control, motion control, and data acquisition. The device operates over an 8-bit SAR conversion range, with a single-ended input range of 0 - 5V and a differential input range of/-2.5V. The maximum sampling rate is 10Ms/s, with a minimum settling time of 250ns.

Application Field

The LTC1861CS8#PBF is particularly well-suited for data acquisition applications, such as motor control, motion control, and digital control. Its high-speed SAR conversion range, combined with its innovative design, make it ideal for demanding applications. The device also offers a wide range of features that make it suitable for applications ranging from low-power, single-conversion systems to multi-channel, multi-conversion systems.In motor control applications, the LTC1861CS8#PBF can be used to accurately measure position and speed of motors. By taking advantage of its integrated input transducer amplifier, the device can accurately measure motor positions over an extended range of speed and position. This makes it ideal for use in closed loop motor control applications.In motion control applications, the LTC1861CS8#PBF can be used to detect a wide range of motion events. Its integrated transducer amplifier allows for a wide range of transducers to be used, enabling measurement of motion events such as velocity and linear displacement.The device is also well-suited for digital control applications, including industrial process controllers and digital signal processors. With its fast settling time and wide input range, the LTC1861CS8#PBF can accurately measure signal frequencies up to 10 MHz, making it ideal for many digital control designs.

Working Principle

The LTC1861CS8#PBF operates using successive approximation register (SAR) architecture. The ADC operates over an 8-bit Sar conversion range, with a single-ended input range of 0 - 5V and a differential input range of/–2.5V. The peak sampling rate is 10Ms/s, with a minimum settling time of 250ns.The first step of the conversion process is the input pre-amplification. The ADC uses a built-in preamplifier to amplify the input signal by a factor of G, and then applies an integrator stage to convert the signal into a current. After correction for the preamplification, the current is connected to the SAR comparator, where it is compared with the desired reference voltage.The SAR comparator starts with a positive guess of the output, then performs successive approximation until it finds the most accurate result. If the guess is too high, it sets the ‘high’ bit of the output; if it is too low it sets the ‘low’ bit. This is done repeatedly until all bits of the output are set.Once the SAR process is complete, the ADC outputs a binary code that directly represents the magnitude of the input voltage. The output data can then be processed further as required by the application.

Conclusion

The LTC1861CS8#PBF offers superior performance, flexibility and cost savings for a variety of data acquisition applications, and is well-suited for motor control, motion control, and digital control environments. Thanks to its 8-bit SAR conversion range, high sampling rate, and low settling time, the device is ideal for use in demanding applications. It also features an integrated transducer amplifier, making it suitable for a wide range of transducers and measurements, including velocity and linear displacement. With its exceptional combination of performance, flexibility, and cost savings, the LTC1861CS8#PBF is an excellent choice for any data acquisition application.

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