Overview
The ADS1018IRUGR, produced by Texas Instruments, is a precision, low-power, 12-bit analog-to-digital converter (ADC) designed for power- and space-constrained sensor-measurement applications. This ultrasmall device is available in a leadless X2QFN-10 package, measuring 1.50 mm × 2.00 mm × 0.4 mm. It integrates a programmable gain amplifier (PGA), an internal voltage reference, an oscillator, and a high-accuracy temperature sensor, making it ideal for various sensor signal measurements.
The ADS1018 operates in either continuous-conversion mode or single-shot mode, significantly reducing current consumption during idle periods. It supports data rates up to 3300 samples per second (SPS) and features a wide power-supply range from 2 V to 5.5 V.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | 12 | - | - | Bits |
| Data Rate | 128 | - | 3300 | SPS |
| Power Supply (VDD) | 2 | - | 5.5 | V |
| Current Consumption (Continuous Mode) | - | 150 | - | μA |
| Operating Ambient Temperature (TA) | -40 | - | 125 | °C |
| Full-Scale Range (FSR) | ±0.256 V | - | ±6.144 V | V |
| Integral Nonlinearity (INL) | - | 0.5 | - | LSB |
| Offset Error | - | ±0.5 | - | LSB |
| Gain Error | - | 0.05% | 0.25% | % |
| Temperature Sensor Accuracy | - | ±1 | ±2 | °C |
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: Ensures high accuracy and stability in measurements.
- Internal Oscillator: Provides a stable clock source for the ADC.
- High-Accuracy Temperature Sensor: Used for system-level temperature monitoring or cold-junction compensation for thermocouples.
- Input Multiplexer: Allows measurement of four single-ended or two differential inputs.
- Low Power Consumption: Continuous mode: 150 μA; Single-shot mode: automatic power-down after conversion.
- Serial Peripheral Interface (SPI): For data transfer.
- Wide Power-Supply Range: From 2 V to 5.5 V.
Applications
- Temperature Measurement: Thermocouple measurement, cold-junction compensation, thermistor measurement.
- Portable Instrumentation: Suitable for battery-powered devices due to low power consumption.
- Factory Automation and Process Controls: Ideal for monitoring and controlling various industrial processes.
Q & A
- What is the resolution of the ADS1018 ADC?
The ADS1018 has a 12-bit resolution.
- What are the available data rates for the ADS1018?
The data rates range from 128 SPS to 3300 SPS.
- What is the power consumption in continuous mode?
The power consumption in continuous mode is 150 μA.
- What is the operating temperature range of the ADS1018?
The operating ambient temperature range is from -40°C to 125°C.
- Can the ADS1018 measure both single-ended and differential inputs?
- What is the purpose of the internal temperature sensor in the ADS1018?
The internal temperature sensor is used for system-level temperature monitoring or cold-junction compensation for thermocouples.
- How does the ADS1018 reduce power consumption in single-shot mode?
In single-shot mode, the ADC performs one conversion and then enters a power-down state, significantly reducing current consumption during idle periods.
- What is the full-scale range of the PGA in the ADS1018?
The full-scale range of the PGA can be set to ±256 mV, ±512 mV, ±1.024 V, ±2.048 V, ±4.096 V, or ±6.144 V.
- Does the ADS1018 support external voltage references?
No, the ADS1018 does not support external voltage references; it has an integrated voltage reference.
- What interface does the ADS1018 use for data transfer?
The ADS1018 uses a Serial Peripheral Interface (SPI) for data transfer.
