Overview
The ADS1118IRUGR, produced by Texas Instruments, is a precision, low-power, 16-bit analog-to-digital converter (ADC) designed for power- and space-constrained sensor-measurement applications. This ultra-small device is available in either a leadless X2QFN-10 package or a VSSOP-10 package. It integrates a programmable gain amplifier (PGA), voltage reference, oscillator, and a high-accuracy temperature sensor, making it ideal for measuring common sensor signals. The ADS1118 operates with a wide power supply range from 2 V to 5.5 V and supports data rates up to 860 samples per second (SPS).
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 16 Bits | |
| Data Rate | 8, 16, 32, 64, 128, 250, 475, 860 SPS | |
| Input Range (PGA) | ±256 mV to ±6.144 V | |
| Input Types | Four single-ended or two differential inputs | |
| Power Supply Voltage | 2 V to 5.5 V | V |
| Operating Temperature Range | –40°C to +125°C | °C |
| Temperature Sensor Accuracy | ±0.5°C (0°C to 70°C) | °C |
| Package Types | X2QFN-10, VSSOP-10 | |
| Interface | SPI (Serial Peripheral Interface) |
Key Features
- Internal programmable gain amplifier (PGA) with input ranges from ±256 mV to ±6.144 V
- Internal low-drift voltage reference and oscillator
- High-accuracy temperature sensor for system-level temperature monitoring or cold-junction compensation for thermocouples
- Support for four single-ended or two differential inputs through an input multiplexer (MUX)
- Low power consumption with single-shot mode that powers down after a conversion
- Data transfer via SPI interface
- Ultra-small packaging options: leadless X2QFN-10 and VSSOP-10
Applications
- Temperature measurement: thermocouple measurement, cold-junction compensation, thermistor measurement
- Portable instrumentation
- Factory automation and process controls
- Power- and space-constrained sensor-measurement applications
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 SPS to 860 SPS.
- What input ranges are supported by the PGA of the ADS1118?
The PGA supports input ranges from ±256 mV to ±6.144 V.
- What types of inputs can the ADS1118 handle?
The ADS1118 can handle four single-ended or two differential inputs.
- What is the operating temperature range of the ADS1118?
The operating temperature range is from –40°C to +125°C.
- How accurate is the temperature sensor of the ADS1118?
The temperature sensor has an accuracy of ±0.5°C from 0°C to 70°C.
- What are the package options for the ADS1118?
The ADS1118 is available in X2QFN-10 and VSSOP-10 packages.
- What interface does the ADS1118 use for data transfer?
The ADS1118 uses the SPI (Serial Peripheral Interface) for data transfer.
- How does the single-shot mode affect power consumption?
The single-shot mode significantly reduces current consumption during idle periods by powering down after a conversion.
- What are some common applications of the ADS1118?
Common applications include temperature measurement, portable instrumentation, and factory automation and process controls.
