ADS1120QPWRQ1

Product Overview

Category

The ADS1120QPWRQ1 belongs to the category of analog-to-digital converters (ADCs).

Use

It is primarily used for converting analog signals into digital data, making it suitable for various applications such as sensor interfaces, industrial automation, and medical instrumentation.

Characteristics

• High-resolution: The ADS1120QPWRQ1 offers a resolution of up to 24 bits, ensuring accurate conversion of analog signals.
• Low power consumption: It operates at low power levels, making it energy-efficient and suitable for battery-powered devices.
• Integrated features: The ADC includes an internal voltage reference, programmable gain amplifier, and temperature sensor, enhancing its versatility and functionality.
• Wide input voltage range: It can handle a wide range of input voltages, allowing for flexibility in different applications.

Package

The ADS1120QPWRQ1 comes in a small-sized package, known as a quad flat no-lead (QFN) package. This package type provides good thermal performance and ease of integration onto circuit boards.

Essence

The essence of the ADS1120QPWRQ1 lies in its ability to accurately convert analog signals into digital data with high resolution and low power consumption.

Packaging/Quantity

The ADS1120QPWRQ1 is typically available in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Resolution: Up to 24 bits
• Input Voltage Range: ±2.048V
• Supply Voltage: 2.7V to 5.5V
• Operating Temperature Range: -40°C to +125°C
• Sampling Rate: Up to 2.5 kSPS (kilosamples per second)
• Interface: SPI (Serial Peripheral Interface)

Detailed Pin Configuration

The ADS1120QPWRQ1 has a total of 20 pins, each serving a specific purpose. The pin configuration is as follows:

1. AVDD: Analog power supply
2. DVDD: Digital power supply
3. AGND: Analog ground
4. DGND: Digital ground
5. AIN0/REFP: Analog input channel 0 / Reference positive
6. AIN1/AIN0: Analog input channel 1 / Analog input channel 0
7. AIN2/AIN1: Analog input channel 2 / Analog input channel 1
8. AIN3/AIN2: Analog input channel 3 / Analog input channel 2
9. AIN4/AIN3: Analog input channel 4 / Analog input channel 3
10. AIN5/AIN4: Analog input channel 5 / Analog input channel 4
11. AIN6/AIN5: Analog input channel 6 / Analog input channel 5
12. AIN7/AIN6: Analog input channel 7 / Analog input channel 6
13. DRDY: Data ready output
14. MISO: Master In Slave Out (SPI interface)
15. MOSI: Master Out Slave In (SPI interface)
16. SCLK: Serial Clock (SPI interface)
17. CS: Chip Select (SPI interface)
18. RESET: Reset input
19. TEST: Test mode input
20. NC: No connection

Functional Features

The ADS1120QPWRQ1 offers several functional features that enhance its performance and usability:

1. Programmable Gain Amplifier (PGA): The integrated PGA allows for amplification of weak analog signals, improving the overall signal-to-noise ratio.
2. Internal Voltage Reference: The built-in voltage reference ensures accurate and stable conversion by providing a known reference voltage.
3. Temperature Sensor: The on-chip temperature sensor enables temperature measurement, making it suitable for applications requiring temperature compensation.
4. Low-Drift Amplifier: The ADC incorporates a low-drift amplifier that minimizes errors caused by temperature variations and other environmental factors.

Advantages and Disadvantages

Advantages

• High resolution for accurate analog-to-digital conversion.
• Low power consumption, suitable for battery-powered devices.
• Integrated features reduce the need for external components.
• Wide input voltage range allows for flexibility in various applications.

Disadvantages

• Limited sampling rate compared to some higher-end ADCs.
• Requires an external microcontroller or processor for data processing and communication.

Working Principles

The ADS1120QPWRQ1 operates based on the successive approximation register (SAR) architecture. It samples the analog input signal, converts it into a digital representation using the internal ADC circuitry, and outputs the converted data through the SPI interface. The programmable gain amplifier and internal voltage reference contribute to the accuracy and stability of the conversion process.

Detailed Application Field Plans

The ADS1120QPWRQ1 finds application in various fields, including:

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