ADS1148IPW Detailed explanation of pin function specifications and circuit principle instructions
The ADS1148IPW is a precision analog-to-digital converter (ADC) produced by Texas Instruments (TI). It belongs to the family of low- Power , 16-bit ADCs that are used for various applications such as measurement systems, instrumentation, and data acquisition.
Packaging Type:
The ADS1148IPW is available in a TSSOP (Thin Shrink Small Outline Package) with 20 pins.
Below is a detailed explanation of the pin functions and specifications for the ADS1148IPW, as well as the corresponding circuit principles and instructions.
Pin Function and Specification List (20 pins)
The ADS1148IPW is a 20-pin package, and each pin has a specific function to serve within the operation of the device. Here is a detailed breakdown:
Pin No. Pin Name Pin Function Description 1 VREF+ Positive reference voltage input for the ADC. This sets the maximum input voltage range for the ADC. 2 VREF- Negative reference voltage input for the ADC. This sets the minimum input voltage range for the ADC. 3 AIN0 Analog input 0 (positive). It is the first analog input channel for the ADC. 4 AIN1 Analog input 1 (negative). It is the first analog input channel for the ADC. 5 AIN2 Analog input 2 (positive). It is the second analog input channel for the ADC. 6 AIN3 Analog input 3 (negative). It is the second analog input channel for the ADC. 7 AIN4 Analog input 4 (positive). It is the third analog input channel for the ADC. 8 AIN5 Analog input 5 (negative). It is the third analog input channel for the ADC. 9 AIN6 Analog input 6 (positive). It is the fourth analog input channel for the ADC. 10 AIN7 Analog input 7 (negative). It is the fourth analog input channel for the ADC. 11 DGND Digital ground reference. This pin serves as the ground for the digital side of the device. 12 SCL Serial Clock input for I2C communication. It drives the clock for serial communication. 13 SDA Serial data input/output for I2C communication. It carries data to/from the ADC. 14 CS Chip select for the SPI interface . This pin is used to select the device for communication in a SPI system. 15 MISO Master-in slave-out for SPI communication. It is used to send data from the ADC to the master device. 16 MOSI Master-out slave-in for SPI communication. It is used to send data from the master device to the ADC. 17 DRDY Data ready output. This pin indicates when the ADC conversion is complete and new data is ready to be read. 18 RESET Reset pin. When this pin is held low, it resets the ADC, returning it to its initial state. 19 VDD Power supply voltage input (typically 3.3V or 5V). This is the supply voltage for the analog and digital circuits of the ADC. 20 AVSS Analog ground input. This serves as the ground reference for the analog side of the device.Circuit Principle
The ADS1148IPW operates by converting an analog signal (applied at the input pins AIN0-AIN7) to a corresponding digital value that can be processed by a microcontroller or other digital system. The key to understanding the working principle of the ADC is the conversion from the analog input voltage to a digital output, which involves several steps:
Sampling and Holding: The input voltage is sampled and held by the internal capacitor s. Conversion: The sampled voltage is converted to a digital output using the successive approximation register (SAR) method. Output: The result is available on the data output pins (SPI or I2C depending on configuration).