ADC128S022CIMTX/NOPB vs ADS1118IRUGR
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| Category | Data Acquisition - Analog to Digital Converters (ADC) | Data Acquisition - Analog to Digital Converters (ADC) |
| Manufacturer | Texas Instruments | Texas Instruments |
| Description | IC ADC 12BIT SAR 16TSSOP | IC ADC 16BIT SIGMA-DELTA 10X2QFN |
| Package | Tape & Reel (TR) | Tape & Reel (TR) |
| Series | - | - |
| Features | - | PGA, Temperature Sensor |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 16-TSSOP (0.173\", 4.40mm Width) | 10-XFQFN |
| Supplier Device Package | 16-TSSOP | 10-X2QFN (2x1.5) |
| Reference Type | Supply | Internal |
| Sampling Rate (Per Second) | 200k | 860 |
| Data Interface | SPI, DSP | SPI |
| Number of Bits | 12 | 16 |
| Voltage - Supply, Analog | 2.7V ~ 5.25V | 2V ~ 5.5V |
| Voltage - Supply, Digital | 2.7V ~ 5.25V | 2V ~ 5.5V |
| Number of Inputs | 8 | 2, 4 |
| Input Type | Single Ended | Differential, Single Ended |
| Configuration | MUX-S/H-ADC | MUX-PGA-ADC |
| Ratio - S/H:ADC | 1:1 | - |
| Number of A/D Converters | 1 | 1 |
| Architecture | SAR | Sigma-Delta |
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1. What is ADC for data acquisition?
A data collector is an electronic device used to convert various data (such as barcodes, RFID tags, etc.) into a storable and editable format and transmit it to a computer or system in real time. Data collectors are usually operated using handheld devices (such as inventory counting machines or PDAs) and have functions such as real-time acquisition, automatic storage, instant display, instant feedback, automatic processing, and automatic transmission. They can be widely used in warehouse management, logistics transportation, retail, medical, military and other fields. The main functions of data collectors include data acquisition, real-time data processing, data storage and transmission.
ADC, or analog-to-digital converter, is an electronic device that can convert continuously changing analog signals into discrete digital signals. It is mainly used in data acquisition, signal processing, communication and other fields.
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2. What is analog data acquisition?
Analog data acquisition refers to the process of converting continuously changing signals of physical quantities into digital signals so that computers can process and record these signals. This process involves the use of an analog quantity collector, which is a hardware device that can convert analog signals of physical quantities into digital signals and then transmit them to a computer for processing and recording.
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3. How to convert analog to digital without ADC?
Analog to digital conversion without ADC can be achieved through PWM circuit. This method is suitable for those main control chips without built-in ADC, which needs to be solved by two GPIOs and an operational amplifier. The basic principle is to use an integral circuit to convert the PWM wave into a smooth DC voltage, and then continuously adjust the PWM duty cycle by comparing it with the voltage to be measured until the output of the comparator changes from 0 to 1, and record the current PWM duty cycle, thereby realizing the measurement of the analog voltage.
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4. What is the principle of analog-to-digital converters?
The working principle of the analog-to-digital converter (ADC) is to convert analog signals into digital signals through four processes: sampling, holding, quantization, and encoding.
The main components of the analog-to-digital converter include samplers and quantizers, which work together to convert continuous analog signals into discrete digital signals. This process requires a reference analog quantity as a standard, and the maximum convertible signal size is usually used as the reference standard. The basic principles of the analog-to-digital converter can be summarized as follows:
Sampling: The analog-to-digital converter first samples the input analog signal through a sampling circuit, that is, discretizes the analog signal on the time axis.
Holding: The sampled signal is held by the holding circuit for the next quantization and encoding process.
Quantization: The quantization process is to divide the amplitude of the sampled and held analog signal into a finite number of le
