Overview
The ADS1018IDGSR, produced by Texas Instruments, is a precision, low-power, 12-bit, noise-free analog-to-digital converter (ADC) designed for power- and space-constrained sensor-measurement applications. This ultrasmall device is available in leadless X2QFN-10 or VSSOP-10 packages, measuring 1.5 mm × 2.0 mm × 0.4 mm and 3.0 mm × 3.0 mm, respectively. The ADS1018 integrates a programmable gain amplifier (PGA), an internal voltage reference, an oscillator, and a high-accuracy temperature sensor, making it ideal for measuring common sensor signals with high resolution and accuracy.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 12 bits | |
| Supply Voltage Range | 2 V to 5.5 V | V |
| Current Consumption (Continuous Mode) | 150 μA | μA |
| Current Consumption (Single-Shot Mode) | Automatic Power-Down | |
| Data Rate | 128 SPS to 3300 SPS | SPS |
| Full-Scale Input Voltage Range | ±6.144 V, ±4.096 V, ±2.048 V, ±1.024 V, ±0.512 V, ±0.256 V | V |
| Temperature Range | –40°C to +125°C | °C |
| Temperature Resolution | 0.125 °C/LSB | °C/LSB |
| Temperature Accuracy | ±0.25 °C (0°C to 70°C), ±1 °C (–40°C to +125°C) | °C |
| Input Impedance (Common-Mode) | 8 MΩ (FSR = ±6.144 V) | MΩ |
| Input Impedance (Differential) | 22 MΩ (FSR = ±6.144 V) | MΩ |
Key Features
- Programmable Gain Amplifier (PGA): Offers input ranges from ±256 mV to ±6.144 V, allowing both large and small signals to be measured with high resolution.
- Internal Voltage Reference: Integrated voltage reference ensures stability and accuracy in measurements.
- Internal Oscillator: A 1-MHz internal oscillator provides the clock signal for the ADC.
- High-Accuracy Temperature Sensor: Used for system-level temperature monitoring or cold-junction compensation for thermocouples with an accuracy of ±0.25 °C (0°C to 70°C) and ±1 °C (–40°C to +125°C).
- Input Multiplexer: Allows measurement of four single-ended or two differential signals.
- Low Power Consumption: Continuous mode current consumption of only 150 μA and automatic power-down in single-shot mode.
- Serial Peripheral Interface (SPI): Data is transferred through an SPI interface.
- Single-Cycle Settling and High Data Rates: Performs conversions at data rates up to 3300 samples per second (SPS).
Applications
- Temperature Measurement: 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: Suitable for industrial applications requiring precise and reliable sensor measurements.
Q & A
- What is the resolution of the ADS1018 ADC?
The ADS1018 has a 12-bit resolution.
- What is the supply voltage range for the ADS1018?
The supply voltage range is from 2 V to 5.5 V.
- How much current does the ADS1018 consume in continuous mode?
The current consumption in continuous mode is 150 μA.
- What are the data rates supported by the ADS1018?
The data rates range from 128 SPS to 3300 SPS.
- What types of input signals can the ADS1018 measure?
The ADS1018 can measure four single-ended or two differential signals.
- Does the ADS1018 have an internal temperature sensor?
Yes, the ADS1018 includes a high-accuracy temperature sensor.
- How does the ADS1018 reduce power consumption?
The ADS1018 reduces power consumption through automatic power-down in single-shot mode and low current consumption in continuous mode.
- What interface does the ADS1018 use for data transfer?
The ADS1018 uses a Serial Peripheral Interface (SPI) for data transfer.
- What are some common applications of the ADS1018?
Common applications include temperature measurement, portable instrumentation, and factory automation and process controls.
- What is the operating temperature range of the ADS1018?
The operating temperature range is from –40°C to +125°C.
