AD7190BRUZ Detailed explanation of pin function specifications and circuit principle instructions（261 ）

The "AD7190BRUZ" is a precision analog-to-digital converter (ADC) from Analog Devices. It has various functions and specifications related to pinouts and uses. Let's go through the details you're asking for.

AD7190BRUZ Pinout and Pin Function Specification

Pin Function Table Pin No. Pin Name Pin Function Description 1 VDD Positive supply voltage input (typically +5V or +3.3V depending on configuration). 2 VSS Ground reference pin. 3 VREF Reference voltage input, used to define the ADC's full-scale input range. 4 REFIN Reference input, used for defining the differential input range for the ADC. 5 SCLK Serial clock input for SPI interface . 6 SDIN Serial data input for communication with the ADC. 7 SDO Serial data output for communication with external devices. 8 CS Chip select for SPI interface. High-level (disabled) or low-level (enabled). 9 CONVST Conversion start control input for initiating conversion. 10 SYNC Synchronization input. Used to synchronize multiple ADC devices or start conversions. 11 REFOUT Reference voltage output, a copy of the internal reference. 12 AGND Analog ground pin. Ensures proper differential voltage operation for ADC. 13 AIN2 Analog input 2, part of the differential input pair for the ADC. 14 AIN1 Analog input 1, part of the differential input pair for the ADC. 15 DRDY Data ready output pin, indicates when the ADC has completed a conversion. 16 RESET Reset pin for re-initializing the ADC to default states. 17 LDAC Load DAC pin, controls whether the DAC value is loaded to the ADC input. 18 AINCOM Common input pin for differential measurements. 19 VOUT Output voltage for the DAC, used to provide a reference voltage or specific output. 20 NC No connection, unused pin. Circuit Principle and Functionality

The AD7190BRUZ is a low-noise, low-power, high-precision ADC. It supports SPI communication and provides features like programmable gain amplification (PGA), internal reference, and several control and status pins.

Functional Overview: Analog-to-Digital Conversion: The main function is to convert analog signals to a 24-bit digital output. Reference Voltage Management : The device uses a high-precision reference voltage for accurate conversion, with VREF and REFIN inputs. SPI Interface: For digital communication, the device uses a standard SPI interface (SCLK, SDIN, SDO, CS) for easy integration into embedded systems. Synchronization: The SYNC pin helps synchronize the device with other ADCs in multi-ADC applications. Power Management : The VDD pin powers the device, and the VSS pin serves as the ground reference. Conversion Control: The CONVST and DRDY pins manage and monitor the conversion process. Reset and Control: The RESET pin allows the device to be reset to default values.

Frequently Asked Questions (FAQ)

1. What is the AD7190BRUZ used for? The AD7190BRUZ is a high-precision analog-to-digital converter used for converting analog signals into a 24-bit digital output in applications such as sensor interfacing and measurement systems. 2. What type of packaging does the AD7190BRUZ come in? The AD7190BRUZ comes in a 20-lead LFCSP (Lead Frame Chip Scale Package), offering a compact form factor with low inductance and capacitance for better performance. 3. What is the supply voltage required for the AD7190BRUZ? The AD7190BRUZ typically operates with a supply voltage of 3.3V or 5V. 4. How is the AD7190BRUZ controlled? It is controlled via an SPI interface, where you send commands through SDIN, and data is retrieved from SDO. 5. What are the common applications for the AD7190BRUZ? Common applications include sensor systems, instrumentation, industrial automation, and medical devices that require high-precision analog-to-digital conversion. 6. How do I initiate a conversion on the AD7190BRUZ? A conversion is initiated by pulling the CONVST pin low. 7. What does the DRDY pin indicate? The DRDY pin goes low when the conversion is complete and the data is available to be read from the ADC. 8. How is the reference voltage managed in the AD7190BRUZ? The VREF pin sets the reference voltage for the ADC conversion range, and the REFOUT pin outputs a copy of the internal reference voltage. 9. What is the purpose of the SYNC pin? The SYNC pin synchronizes the conversion process of multiple AD7190BRUZ devices when used in a multi-device system. 10. Can I use the AD7190BRUZ in low-power applications? Yes, the AD7190BRUZ is designed for low-power operation, making it suitable for battery-powered systems. 11. How is the SPI interface used with the AD7190BRUZ? The SPI interface uses SCLK (serial clock), SDIN (data input), SDO (data output), and CS (chip select) for data transfer. 12. How does the AD7190BRUZ ensure measurement accuracy? The AD7190BRUZ uses internal filtering and programmable gain amplifiers (PGA) to ensure high accuracy and noise reduction in measurements. 13. Is there an internal reference in the AD7190BRUZ? Yes, the AD7190BRUZ has an internal reference voltage that can be used for conversion, but it also allows external reference input via the VREF pin. 14. What is the maximum input voltage for the AD7190BRUZ? The maximum differential input voltage for the ADC is determined by the reference voltage and the supply voltage, typically between ±VREF. 15. How do I reset the AD7190BRUZ? The device can be reset by pulling the RESET pin low for at least 10ns. 16. What is the typical conversion time for the AD7190BRUZ? The typical conversion time is approximately 10ms per conversion for standard 24-bit resolution. 17. Can the AD7190BRUZ be used in multi-channel applications? Yes, the AD7190BRUZ can be used in multi-channel systems, with the ability to synchronize multiple devices through the SYNC pin. 18. What is the noise performance of the AD7190BRUZ? The AD7190BRUZ offers low noise performance, with a 24-bit resolution ideal for precise measurements in noisy environments. 19. What is the significance of the LDAC pin? The LDAC pin allows you to load the DAC value into the ADC input for use in measurements, controlling the input signal to the ADC. 20. What is the recommended operating temperature range for the AD7190BRUZ? The recommended operating temperature range for the AD7190BRUZ is -40°C to +85°C.

This detailed information covers the pin functions, packaging details, and answers to common questions about the AD7190BRUZ. I hope this comprehensive guide helps!