LTC2447CUHF#PBF

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The LTC2447CUHF#PBF is an 18/16-bit Serial Output No Latency ΔΣ™ ADC and is part of Analog Devices’ family of low power, high performance Data acquisition - Analog to Digital Converters (ADCs). The device is mainly used for precision measurements for industrial process and factory automation, medical devices, and automotive applications. The device features an exceptionally low noise of ±1.0µV, a wide operating temperature range of up to 125°C, low power of 270µW, and excellent data sampling rate and resolution performance.

The LTC2447CUHF#PBF utilizes a 1-Wire, serial communication interface, and provides component savings over parallel interfaces due to its utilization of a single data line for transmitting output data with a minimum of interface components. Additionally, its small form factor and low power dissipation, makes it a highly suitable component for applications where a power source is limited or the space for mounting is extremely tight.

Working principle:

The LTC2447CUHF#PBF is a high resolution differential ADC with incremental gain amplifier that can sample different kinds of input signals which range from ±2.5V to ±25V. It has a maximum sample frequency of 6.3 mega samples per second, allowing the user to acquire data with a maximum resolution of 18-bit. The device operates on a 1-Wire serial interface, meaning it requires only a single-wire connection which would help processing of data acquisition signals.

The LTC2447CUHF#PBF works on the concept of successive approximation, where the operator direct one data bit at a time to the input register of the ADC. This method is compared to the traditional parallel method of data format transmission, where it would take NAD (Number Of Analog Digital) data bits to transmit the same data. The ADC compares the digital value (one bit at a time) stored in the input register with the analog signal that is converted to digital format and stored on a register.

The output feedback contains 8 to 16 bits at the upper part and 8 to 16 bits at the lower part; if 18-bit resolution is required, then 16 bits at the upper part and 16 bits at the lower part. If switching to 16-bit, then 14 bits at the upper part and 14 bits at the lower part are included in the output feedback. The output is then converted to a voltage signal which can be used by the circuit for further data interpretation.

Features:

• 18 to 16- bit serial output no latency ΔΣ™ ADC
• Wide input signal range from ±2.5V to ±25V
• High-resolution accuracy of 0.018% FSR
• Low noise: ±1 µV maximum peak-to-peak
• 6.3MSPS maximum sample rate
• Wide operating temperature range up to 125°C
• Ultra-low power consumption:270 μW
• 1-Wire serial interface

The device features an integrated low-noise amplifier and low-drift, low-offsetΔΣ modulator, making it ideal for performing precision measurements. Its wide input signal range, high sampling rate and resolution, along with its small form factor, make the LTC2447CUHF#PBF a highly suitable component for many signal processing purposes.

Applications:

• Factory and process automation systems
• Machine condition monitoring
• Medical testing equipment
• Industrial motion control
• Power supply control and protection
• Automotive control and safety systems
• Power system monitoring
• Medical imaging

The LTC2447CUHF#PBF is the ideal solution for applications that require high-resolution and low-noise performance in a small package. The device is well-suited for a broad range of industrial, medical, and automotive applications where space or power is limited or data must be acquired remotely.

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