LTC1296DCSW#PBF

Series:	--
Packaging:	Tube
Part Status:	Active
Type:	Data Acquisition System (DAS), ADC
Number of Channels:	8
Resolution (Bits):	12 b
Sampling Rate (Per Second):	46.5k
Data Interface:	Serial, Parallel
Voltage Supply Source:	Dual ±
Voltage - Supply:	±5V, 5V
Operating Temperature:	0°C ~ 70°C
Mounting Type:	Surface Mount
Package / Case:	20-SOIC (0.295", 7.50mm Width)
Supplier Device Package:	20-SOIC
Base Part Number:	LTC1296

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Introduction

The LTC1296DCSW#PBF is a high-performance, low-power differential-input precision 12-bit successive-approximation analog-to-digital converter (ADC) designed for use in industrial, medical, and instrumentation applications. This converter has both a high-accuracy and low-noise performance making it the ideal conversion solution for precision measurements. The ADC utilizes the proven Sigma-Delta architecture and when combined with the continuous-time reconstruction filter and the DCFET structure, provides superior ac and dc specifications. Specifically, this converter includes a high-accuracy reference, data-rate options of 5 to 250 MHz, I/O voltages of 2.5 V with 5 V-spike immunity and is powered by a 3V supply.The technology used in the LTC1296DCSW#PBF allows applications to acquire digital data accurately and very quickly while still requiring a minimal amount of power. This ADC is an ideal solution for applications where the utilization of the broad range of features and optimal performance is critical. Furthermore, the extremely low current consumption (the core power consumption is 120mW over the common operating temperature range) combined with the excellent performance makes the ADC an ideal solution for low-power battery-powered applications.

Application Field

The LTC1296DCSW#PBF is a high-resolution ADC that is specifically designed for industrial, medical, and instrumentation applications. Its ultra-precise conversion performance, high speed, and low power consumption make it a versatile solution for medical applications where accuracy and response times are just as critical as power savings. In industrial applications, the LTC1296DCSW#PBF can be used in data acquisition, motor control, and instrumentation. The ADC is ideal for use in products such as programmable logic controllers (PLCs) and process-control enclosures, where accurate analog readings and monitoring is necessary while still maintaining high speeds. Furthermore, the ADC plays a crucial role in the automation and instrumentation of motors, transformers, and other components and systems. Its low power consumption and wide operating range also make the ADC suitable for military, aerospace, and commercial applications, such as robotics and automation, where power efficiency is essential for long-term operation.

Working Principle

The operating principle of the LTC1296DCSW#PBF is based on a Sigma-Delta modulator. Sigma-Delta converters are special types of analog-to-digital converters which are based on the concept of using a noise-shaping analog-to-digital modulation scheme to reduce the number of bits required for a given accuracy level. In this scheme, the analog input is sampled at a rate much higher than the Nyquist rate, and the resulting quantized error is then used to drive a low-order digital-to-analog converter, which effectively shapes the quantization noise.The LTC1296DCSW#PBF features high-resolution differential inputs which are sampled with a running continuously-time filter which allows for wide digital input ranges while still achieving low noise transfer and high accuracy. The differential input configuration provides optimal performance in both single-ended and differential-mode inputs, while the user-selectable power saving mode reduces power consumption when idle. The ADC also features a fast multiplexer with selectable and programmable input ranges.The converter features a 12-bit 10-bit data-rate options and supports up to 16 channels for scan conversion. An on-chip temperature sensor performs internal temperature monitoring and temperature correction of the output code. In addition, the LTC1296DCSW#PBF incorporates a built-in self-calibration (CAL) sequence which eliminates the need for an external calibration process. This CAL sequence is used for a one-time calibration of the device, which allows for both ac and dc accuracy.

Conclusion

The LTC1296DCSW#PBF is a low-power, high-accuracy ADC designed for industrial, medical, and instrumentation applications. Utilizing a Sigma-Delta modulator architecture and continuous time reconstruction filter, the ADC is capable of producing very low noise transfer, high accuracy, and wide digital input ranges. The ADC features differential inputs, fast multiplexing, 8 to 16 channels for scan conversion, up to 250 MHz data rate, and extremely low power consumption. Additionally, the LTC1296DCSW#PBF features self-calibration circuitry which eliminates the need for external calibration and make it ideal for low-power, high-precision applications.

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