Overview
The ADS1118IRUGT from Texas Instruments is a precision, low-power, 16-bit analog-to-digital converter (ADC) designed for measuring common sensor signals in a variety of applications. This ultra-small device is available in either a leadless X2QFN-10 package or a VSSOP-10 package, making it ideal for power- and space-constrained sensor-measurement applications. The ADS1118 integrates a programmable gain amplifier (PGA), voltage reference, oscillator, and a high-accuracy temperature sensor, all within a wide power supply range of 2 V to 5.5 V.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 16 Bits | |
| Data Rate | 8 to 860 SPS | |
| Input Types | Four Single-Ended or Two Differential Inputs | |
| PGA Input Ranges | ±256 mV to ±6.144 V | |
| Temperature Sensor Accuracy | 0.5°C (Maximum) Error: 0°C to 70°C | |
| Operating Temperature Range | –40°C to +125°C | °C |
| Power Supply Range | 2 V to 5.5 V | V |
| Package Types | X2QFN-10, VSSOP-10 | |
| Communication Interface | SPI™ |
Key Features
- Programmable Gain Amplifier (PGA): Offers input ranges from ±256 mV to ±6.144 V, allowing for the measurement of both large and small signals with high resolution.
- Internal Oscillator and Voltage Reference: Ensures stable and accurate conversions.
- High-Accuracy Temperature Sensor: Can be used for system-level temperature monitoring or cold-junction compensation for thermocouples.
- Input Multiplexer (MUX): Allows measurement of two differential or four single-ended inputs.
- Low Power Consumption: Operates in continuous-conversion mode or single-shot mode, which significantly reduces current consumption during idle periods.
- Compact Packaging: Available in ultra-small X2QFN-10 and VSSOP-10 packages.
Applications
- Temperature Measurement: Suitable for thermocouple measurement, cold-junction compensation, and thermistor measurement.
- Portable Instrumentation: Ideal for battery-powered devices due to its low power consumption.
- Factory Automation and Process Controls: Used in various industrial applications requiring precise sensor signal measurement.
Q & A
- What is the resolution of the ADS1118 ADC?
The ADS1118 has a resolution of 16 bits.
- What are the available data rates for the ADS1118?
The data rates range from 8 to 860 samples per second (SPS).
- What types of inputs can the ADS1118 measure?
The ADS1118 can measure four single-ended or two differential inputs.
- What is the accuracy of the internal temperature sensor?
The internal temperature sensor has a maximum error of 0.5°C from 0°C to 70°C.
- What is the operating temperature range of the ADS1118?
The operating temperature range is from –40°C to +125°C.
- What power supply range does the ADS1118 support?
The ADS1118 supports a power supply range from 2 V to 5.5 V.
- How does the ADS1118 reduce power consumption?
The ADS1118 reduces power consumption by operating in single-shot mode, which automatically powers down after a conversion.
- What communication interface does the ADS1118 use?
The ADS1118 uses a serial peripheral interface (SPI™) for data transfer.
- What are the package options for the ADS1118?
The ADS1118 is available in X2QFN-10 and VSSOP-10 packages.
- What are some common applications of the ADS1118?
Common applications include temperature measurement, portable instrumentation, and factory automation and process controls.
