ADC1173EVM

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The Texas Instruments ADC1173EVM is an evaluation board for the ADC1173 analog-to-digital converter (ADC). The ADC1173 is a low-power 12-bit ADC with a 32-level programmable gain range and versatile output rate. The ADC1173EVM is a perfect tool in the design of precision monitoring for industrial process control, test & measurement systems, and smart sensor systems. This application report will briefly discuss the field of application and operating principle of the ADC1173EVM.

ADC1173EVM Application Field

The ADC1173EVM board serves as a complete evaluation platform for the ADC1173 IC. Specifically, the ADC1173EVM is designed to allow for the ease of implementation within extremely low and high voltage industrial settings. The ADC1173EVM’s differential input structure and wide gain range allows for accurate and precise measurements, even in noisy environments with common-mode and power line noise.

The ADC1173EVM is especially useful when used in low-power applications. Being a low-power device, it can be used in a wide variety of applications to maximize battery life. This is especially useful in system designs that require long-term operation with limited resources and no access to external power.

The ADC1173EVM is also well suited for applications in medical instrumentation. This is due to its fast and reliable sampling rate of up to 1MSPS, as well as its wide power supply range of ± 5V. With such wide dynamic range, the ADC1173EVM can reliably interface with a range of medical transducers and circuits.

Furthermore, the ADC1173EVM can be used in precision test & measurement systems as well. This is due to its low-power consumption and multiple programmable input ranges which increase its resolution. Thus, with its increased resolution, the ADC1173EVM can provide precise measurements even under varying environmental conditions.

ADC1173EVM Working Principle

The ADC1173EVM uses a single-ended input structure and a 12-bit precision resolution for accurate and efficient data acquisition. It operates with a supply voltage range of ± 5V, and has a maximum power consumption of 1 mW in standby mode.

The ADC1173EVM integrates a differential-pair amplifier and a differential-input level shifter that accepts single-ended inputs. When using the differential mode, the analog input signal is coupled to pins INP and INM. The differential amplifier amplifies the differential input signal and passes the AC-coupled signal to a level shifter and comparator. The signal is then digitized using the 12-bit successive approximation process.

The samples are internally stored in an 8-bit shift register, which is then transferred to an external shift register via the serial output. The serial output can be further interfaced with either a microcontroller or a digital signal processor for data collection and analysis.

The ADC1173EVM also provides multiple sample rate options which can be programmed via control bits. The sampling rates can be controlled between 0.5 MSPS and 1 MSPS using the OSR1 and OSR2 bits. The maximum resolution is maintained even at the higher sampling rates by using a programmable internal reference and an autocalibration logic block.

Conclusion

The Texas Instruments ADC1173EVM is a complete evaluation board for the ADC1173 analog-to-digital converter. The board provides the necessary features to accurately measure a variety of analog inputs in a wide range of industrial settings, from low-power medical applications to precision test & measurement systems. The board’s 12-bit resolution and wide gain range allows for accurate and precise measurements, even in noisy environments. The ADC1173EVM also supports multiple sampling rates, and provides low-power consumption and a wide power supply range.

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