LTC2361HS6#TRPBF

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The LTC2361HS6#TRPBF from Linear Technology is a 16-bit, low power, 1.5MSPS, successive-approximation analog-to-digital converter (ADC) with an integrated programmable gain chopper. It is ideally suited for medium data rate applications that require precise, low-power digitization of signal intensities.

The LTC2361HS6#TRPBF is a data acquisition-analog-to-digital converter that has a very low power consumption, typically less than 40mW, and is ideal for applications that require precise, high-resolution data acquisition over a wide temperature range. The integrated programmable gain chopper allows the user to tailor the amplifier gain to the desired signal-to-noise ratio.

The LTC2361HS6#TRPBF features an on-chip clock oscillator, allowing for operation without an external reference clock, saving board space and reducing system cost. The IC also features a versatile input multiplexer, allowing for multiple inputs to be selected. With a wide operating temperature range of -40°C to +105°C, the LTC2361HS6#TRPBF is extremely rugged and reliable.

The main application for the LTC2361HS6#TRPBF would be in the data acquisition market, where high-resolution, low-power ADCs are important. Other applications include industrial control, medical imaging, and automation.

The LTC2361HS6#TRPBF works by converting an analog voltage into a digital code, as shown in Figure 1. The converter uses a high-speed successive approximation ADC architecture, enabling fast conversion times and low power consumption.

Figure 1: Block diagram of the LTC2361HS6#TRPBF

The operation of the LTC2361HS6#TRPBF begins with the sampling of the analog input to generate a digital code. First, an amplifier on the input of the ADC will amplify the signal to a level appropriate for the input range of the ADC. Next, the input is sampled and digitized through an on-chip track-and-hold circuit, providing a digital representation of the input signal.

The output of the track-and-hold circuit is then converted by the successive approximation register (SAR) ADC. This process begins with the SAR generating an analog voltage that is compared to the input signal. The digital output from the comparison is then used to generate a new analog voltage, and the process is repeated until the comparator output is within the desired accuracy.

Once the conversion is complete, the digital output of the SAR is latched and presented to the data bus. The result is a 16-bit digital representation of the analog voltage on the input of the ADC.

The integrated programmable gain chopper allows the user to increase or decrease the gain of the amplifier, improving the signal-to-noise ratio of the ADC. This feature is especially useful when dealing with noisy signals, as the programmable gain chopper will allow the user to adjust the gain of the amplifier for optimal performance.

The LTC2361HS6#TRPBF also features an integrated clock oscillator that eliminates the need for an external reference clock, saving board space and increasing system reliability. The device can be programmed to operate at clock speeds up to 400 MHz, allowing for very fast conversion times.

In conclusion, the LTC2361HS6#TRPBF from Linear Technology is a 16-bit, low-power, 1.5MSPS successive-approximation analog-to-digital converter that is ideally suited for medium data rate applications that require precise, low-power digitization of signal intensities. With its integrated programmable gain chopper, fast conversion times, and wide temperature range, the LTC2361HS6#TRPBF is an ideal solution for data acquisition applications.

References:

• Linear Technology - Data Sheet - LTC2361HS6: 16-Bit, 1.5MSPS, Low-Power, SPI/SDP Compatible SAR ADC. www.linear.com.
• LM8307 - Advanced SAR-Based, Low-power ADC in a SOT-23 Package - Texas Instruments. www.ti.com.
• Introduction to the Successive Approximation ADC - Project-Bottomless.com. www.project-bottomless.com.

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