Overview
The ADS1118IDGSR, produced by Texas Instruments, is a precision, low-power, 16-bit analog-to-digital converter (ADC) designed for measuring common sensor signals in power- and space-constrained applications. This ADC is available in an ultra-small, leadless X2QFN-10 package or a VSSOP-10 package, making it ideal for a variety of sensor-measurement tasks. 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 | Specification |
|---|---|
| Resolution | 16-bit |
| Data Rate | 8 SPS to 860 SPS |
| Input Types | Four single-ended or two differential inputs |
| PGA Input Ranges | ±256 mV to ±6.144 V |
| Power Supply Range | 2 V to 5.5 V |
| Current Consumption (Continuous Mode) | 150 µA |
| Current Consumption (Single-Shot Mode) | Automatic power down after conversion |
| Temperature Sensor Accuracy | 0.5°C (Maximum) Error: 0°C to 70°C |
| Operating Temperature Range | –40°C to +125°C |
| Package Type | Ultra-small X2QFN-10 or VSSOP-10 |
| Package Dimensions | 2 mm × 1.5 mm × 0.4 mm (X2QFN) |
| Interface | Serial Peripheral Interface (SPI) |
Key Features
- Internal low-drift voltage reference and oscillator
- Programmable gain amplifier (PGA) with input ranges from ±256 mV to ±6.144 V
- High-accuracy temperature sensor for system-level temperature monitoring or cold-junction compensation for thermocouples
- Single-cycle settling and programmable data rate
- Low current consumption with automatic power down in single-shot mode
- Ultra-small package options (X2QFN-10 and VSSOP-10)
- Wide power supply range from 2 V to 5.5 V
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 is a 16-bit analog-to-digital converter.
- What are the data rate options for the ADS1118? The ADS1118 can perform conversions at data rates from 8 SPS to 860 SPS.
- What types of inputs does the ADS1118 support? The ADS1118 supports four single-ended or two differential inputs.
- What is the power supply range for the ADS1118? The power supply range is from 2 V to 5.5 V.
- How does the ADS1118 manage power consumption? The ADS1118 operates in continuous-conversion mode or single-shot mode with automatic power down after a conversion to reduce current consumption.
- 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 interface does the ADS1118 use for data transfer? The ADS1118 uses a serial peripheral interface (SPI) for data transfer.
- What are the package options for the ADS1118? The ADS1118 is available in ultra-small X2QFN-10 and VSSOP-10 packages.
- What are some common applications for the ADS1118? Common applications include temperature measurement, portable instrumentation, and factory automation and process controls.
- What is the operating temperature range for the ADS1118? The operating temperature range is from –40°C to +125°C.
