What is the ADS1118IDGSR and How Does it Work?
21 February 2024
Ⅱ. Specifications of ADS1118IDGSR
Ⅲ. Absolute maximum ratings of ADS1118IDGSR
Ⅳ. How does ADS1118IDGSR work?
Ⅵ. What are the characteristics of ADS1118IDGSR?
Ⅶ. Typical application of ADS1118IDGSR
Ⅷ. Where is ADS1118IDGSR used?
ADS1118IDGSR is a 16-bit analog-to-digital converter produced by Texas Instruments. It is mainly used in automation systems, medical equipment and sensor interfaces. This article will introduce the specific information of ADS1118IDGSR in terms of specifications, features, working principle and applications.
The ADS1118IDGSR is a 16-bit analog-to-digital converter (ADC) with high-precision, low-power features that provides all the functionality needed to measure the most common sensor signals in the ultra-small, leadless X2QFN-10 package or VSSOP-10 package. The converter integrates a programmable gain amplifier (PGA), voltage reference, oscillator, and high-precision temperature sensor to provide comprehensive measurement capabilities. In addition, its wide power supply range from 2V to 5.5V and excellent performance characteristics make it ideal for power- and space-constrained sensor measurement applications.
Meanwhile, the ADS1118IDGSR device is capable of performing conversions at a data rate of 860 samples per second (SPS). The PGA provides a voltage range from +256mV to +6.144V, allowing large and small signals to be measured with high resolution. The input multiplexer (MUX) supports measurements on two differential or four single-ended inputs. In addition, high-precision temperature sensors can be used for system-level temperature monitoring or cold-junction compensation of thermocouples. The ADS1118IDGSR can operate in either continuous conversion mode or one-shot mode with automatic power-down after conversion, the latter significantly reducing current consumption during idle periods. Data is transferred via the Serial Peripheral Interface (SPI). Its operating temperature range is -40°C to +125°C.
Alternatives and equivalents:
• The power consumption of this chip is 900 uW.
• Its power supply voltage is 2V to 5.5V.
• Its installation method is SMD or SMT.
• ADS1118IDGSR has 4 channels and 16-bit resolution.
• Its operating temperature is -40°C to 125°C.
• Its supply voltage is 2V to 5.5V.
• The manufacturer of ADS1118IDGSR is Texas Instruments.
• The ADS1118IDGSR has 10 pins and is packaged in VSSOP-10 and cut tape (CT).
• The ADS1118IDGSR has a length of 3 mm, a width of 5 mm, and a height of 1.1 mm.
Over operating temperature ambient range (unless otherwise noted)
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These stress ratings indicate the device's limitations and do not suggest its functional performance under these or any other conditions outside those specified within the Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
The ADS1118IDGSR receives analog voltage signals from external sensors or signal sources and provides four single-ended or two differential input channels, allowing the user to select the appropriate input mode according to requirements. Once the analog signal has been acquired, the ADS1118IDGSR converts it to digital form through its built-in analog-to-digital converter (ADC). This conversion process employs Sigma-Delta modulation technology, which combines a high-speed analog-to-digital converter and a digital filter to achieve high-precision analog signal conversion.
In addition, the ADS1118IDGSR is equipped with a built-in digital filter and programmable gain amplifier. These features can be used to improve signal quality and sensitivity to meet the needs of different applications. Users can flexibly adjust the filter settings and gain settings as needed. After the conversion is complete, the ADS1118IDGSR outputs the digital results to the appropriate output interface. These digital results are typically further processed or analyzed by microcontrollers or other digital systems to enable various application functions.
The ADS1118IDGSR is compact, measuring 3mm in length, 5mm in width, and 1.1mm in height. It offers two package choices: X2QFN-10 and VSSOP-10. Both packages are compact and ideal for space-constrained sensor measurement applications. The X2QFN-10 package is not only small in size, but also has excellent heat dissipation performance. The VSSOP-10 package is thinner and suitable for applications with special thickness requirements.
The characteristics of ADS1118IDGSR are as follows:
1. Wide supply voltage range: The ADS1118IDGSR operates from 2V to 5.5V, making it ideal for power- and space-constrained sensor measurement applications.
2. Programmable data transmission rate: The data transmission rate of ADS1118IDGSR is from 8SPS to 860SPS to meet the needs of different applications.
3. Low power consumption: In continuous conversion mode, the power consumption of ADS1118IDGSR is 150µA; in single-shot mode, its power consumption is even lower.
4. Integrated programmable gain amplifier (PGA): It provides voltage from +256mv to +6.144V, allowing measurement of large and small signals with high resolution.
5. High accuracy: The ADS1118IDGSR provides all the functionality needed to measure the most common sensor signals in the ultra-small, leadless X2QFN-10 package or VSSOP-10 package.
The figure shows the basic connections for an independent, two-channel thermocouple measurement system when using the internal high-precision temperature sensor for cold-junction compensation. Apart from the thermocouples, the only external circuitry required are biasing resistors, first order low-pass, anti-aliasing filters, and a power supply decoupling capacitor.
• Medical devices: The ADS1118IDGSR has the ability to convert physiological parameters (e.g., ECG signals, blood pressure signals) into digital form. The data acquisition function of this chip is very suitable for use in medical equipment such as blood pressure monitors, ECG machines, blood glucose meters, etc., enabling doctors to better understand the physiological conditions of their patients in order to provide more accurate medical advice.
• Power monitoring and control: In power systems, the ADS1118IDGSR can be used to monitor parameters such as current, voltage and power. By converting analog electrical signals into digital form, it enables real-time monitoring and control of power systems.
• Automation systems: In industrial automation and automation control systems, the ADS1118IDGSR can be used to acquire sensor signals and convert them to digital form for processing by PLCs (programmable logic controllers) or other controllers.
• Sensor interface: ADS1118IDGSR can be used to interface with various sensors, such as temperature sensors, pressure sensors, light sensors and so on. It can convert the analog signal output from the sensor into a digital signal for processing and analysis by a microcontroller or other digital processor.
• Instrumentation: ADS1118IDGSR can be used in various instruments, such as multi-purpose testers, oscilloscopes, etc. As the core component, ADS1118IDGSR converts the analog signals collected by the sensor into digital signals through its precise analog-to-digital conversion function, so that various parameters, such as temperature, pressure, voltage, current, etc., can be accurately measured and analyze.
Frequently Asked Questions
1. What is the resolution of the ADS1118IDGSR?
The ADS1118IDGSR has a resolution of 16 bits, providing high precision in converting analog signals to digital data.
2. What are some key features of the ADS1118IDGSR?
Some key features include a built-in programmable gain amplifier (PGA), internal voltage reference, low-power consumption, and a wide supply voltage range.
3. What is the replacement and equivalent of ADS1118IDGSR?
You can replace the ADS1118IDGSR with ADS1113IDGST, ADS1115IDGSR, ADS1118IDGST, or ADS1118QDGSRQ1.
4. What is the voltage reference of ADS1118?
The ADS1118 integrates a programmable gain amplifier (PGA), voltage reference, oscillator and high-accuracy temperature sensor. These features, along with a wide power supply range from 2 V to 5.5 V, make the ADS1118 ideally suited for power- and space-constrained, sensor-measurement applications.
