AD7793BRUZ Detailed explanation of pin function specifications and circuit principle instructions

The AD7793BRUZ is a precise, low- Power , 24-bit analog-to-digital converter (ADC) produced by Analog Devices. This chip is often used in applications requiring high-resolution data conversion, such as sensor interfacing in industrial, medical, and instrumentation systems. Below is a detailed explanation of the pin functions, package details, and FAQs related to this specific component.

1. AD7793BRUZ Pin Functions and Specifications

Package Type:

The AD7793BRUZ comes in a 16-pin LFCSP (Lead Frame Chip Scale Package). The package size is 4mm x 4mm, and the "RU" suffix indicates that it uses a reflow soldering process.

Pinout Description: Pin No. Pin Name Pin Type Pin Function 1 VDD Power Positive Power Supply (+2.7V to +5.25V) 2 GND Power Ground (0V) 3 AIN2 Analog Analog Input Channel 2 4 AIN1 Analog Analog Input Channel 1 5 REF– Input Negative Reference Voltage (typically connected to GND) 6 REF+ Input Positive Reference Voltage (typically connected to VDD or external reference) 7 SDO Output Serial Data Output (SPI data output from the ADC) 8 SCLK Input Serial Clock Input (used for SPI communication) 9 CS Input Chip Select (used for SPI communication) 10 AIN3 Analog Analog Input Channel 3 11 AIN4 Analog Analog Input Channel 4 12 DRDY Output Data Ready (Indicates when a new conversion result is available) 13 RDY Output Ready (Status output for the system indicating ADC readiness) 14 SDO/SDI Input/Output SPI Data Out (when in read mode, output data; in write mode, input data) 15 AIN5 Analog Analog Input Channel 5 16 VREF Input Reference Voltage (used to set the ADC's input range) General Pin Description: VDD (Pin 1): This is the positive supply pin. It should be connected to a stable voltage source in the range of 2.7V to 5.25V. GND (Pin 2): This is the ground pin, connected to the system ground. AINx (Pin 3-16): These pins are the input channels for the ADC. They accept differential or single-ended analog signals that are converted to a digital form. Channels AIN1 and AIN2 are often used in differential measurements. SCLK (Pin 8), CS (Pin 9), and SDO (Pin 7): These are SPI interface pins used for communication with a microcontroller or another digital interface. REF+ and REF- (Pins 5 and 6): These are the reference voltage pins. They set the range of the ADC and typically should be connected to a precision voltage reference. DRDY (Pin 12) and RDY (Pin 13): These pins are used to indicate when the ADC has completed a conversion and when new data is available.

2. Frequently Asked Questions (FAQs)

1. What is the input voltage range of the AD7793BRUZ? The input voltage range is determined by the reference voltage (REF+ and REF-) and the power supply (VDD). The input range typically spans from 0V to the reference voltage, with the exact limits depending on the reference configuration. 2. What is the resolution of the AD7793BRUZ ADC? The AD7793BRUZ is a 24-bit ADC, which allows for extremely fine measurements with high accuracy. 3. Can the AD7793BRUZ be used for differential measurements? Yes, the AD7793BRUZ supports differential inputs on channels AIN1, AIN2, AIN3, and AIN4. The ADC can measure the difference between these pins, improving noise rejection. 4. What is the typical power consumption of the AD7793BRUZ? The typical power consumption of the AD7793BRUZ is around 0.6mW in normal operation, making it suitable for battery-powered devices. 5. What is the operating temperature range for the AD7793BRUZ? The AD7793BRUZ operates within a temperature range of –40°C to +85°C, making it suitable for industrial applications. 6. What is the maximum clock speed supported by the AD7793BRUZ? The AD7793BRUZ supports an SPI clock speed of up to 2.5 MHz. 7. How do I interface the AD7793BRUZ with a microcontroller? The AD7793BRUZ communicates using SPI (Serial Peripheral Interface). You need to connect the SCLK, CS, and SDO pins to the corresponding SPI pins of the microcontroller. 8. What is the function of the DRDY pin? The DRDY (Data Ready) pin indicates when the ADC has finished a conversion and new data is available. It can be used to trigger an interrupt on the microcontroller. 9. Can I use a single-ended input with the AD7793BRUZ? Yes, the AD7793BRUZ supports single-ended inputs on any of the input channels, with respect to the reference voltage. 10. What is the maximum output data rate of the AD7793BRUZ? The maximum output data rate is up to 5 kSPS (kilocycles per second). 11. What are the benefits of using a 24-bit ADC like the AD7793BRUZ? The 24-bit resolution allows for precise measurements, which is crucial for applications that need high-accuracy signal conversion, such as sensor readings in industrial or medical environments. 12. Can I use the AD7793BRUZ with an external reference voltage? Yes, the reference voltage can be supplied externally via the REF+ and REF- pins. The choice of reference voltage will affect the output range and accuracy of the ADC. 13. What is the maximum sampling rate of the AD7793BRUZ? The maximum sampling rate of the AD7793BRUZ is 5 kSPS. 14. Is the AD7793BRUZ suitable for low-power applications? Yes, the AD7793BRUZ is designed for low-power consumption and can operate in a low-power mode, making it ideal for battery-operated devices. 15. What is the power supply voltage range for the AD7793BRUZ? The AD7793BRUZ operates with a supply voltage between 2.7V to 5.25V. 16. How do I configure the AD7793BRUZ for differential input? To configure the AD7793BRUZ for differential input, select the appropriate input channels and ensure that the reference voltage is set accordingly to maximize the differential input range. 17. What are the typical applications of the AD7793BRUZ? The AD7793BRUZ is commonly used in industrial process control, instrumentation, medical devices, and sensor interfaces, where high-precision data conversion is required. 18. Does the AD7793BRUZ have built-in calibration? Yes, the AD7793BRUZ includes internal calibration routines to ensure accurate measurements. 19. Can I adjust the output data rate of the AD7793BRUZ? Yes, the output data rate can be adjusted by configuring the relevant registers via the SPI interface to suit the needs of the application. 20. What are the recommended external components for the AD7793BRUZ? For proper operation, external components such as decoupling capacitor s (typically 0.1µF and 10µF) for power supply pins and a suitable reference voltage source are recommended.

This explanation includes a detailed list of pin functions, a table with descriptions, and answers to the most common questions about the AD7793BRUZ.