Overview
The ADS1018-Q1 is a precision, low-power, 12-bit analog-to-digital converter (ADC) designed by Texas Instruments. This device is specifically tailored for power- and space-constrained sensor-measurement applications. It integrates a programmable gain amplifier (PGA), an internal low-drift voltage reference, an oscillator, and a high-accuracy temperature sensor. The ADS1018-Q1 is AEC-Q100 qualified for automotive applications, with a temperature grade 1 rating from –40°C to +125°C, and is functional safety-capable. It operates with a wide supply range of 2 V to 5.5 V and features low current consumption, making it ideal for battery management and various automotive sensor applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 12-bit | |
| Maximum Sample Rate | 3300 | SPS |
| Input Channels | 2 (differential), 4 (single-ended) | |
| Programmable Gain Amplifier (PGA) | Yes | |
| Input Ranges | ±256 mV to ±6.144 V | |
| Supply Voltage | 2 V to 5.5 V | V |
| Current Consumption (Continuous Mode) | 150 μA | μA |
| Current Consumption (Single-Shot Mode) | Automatic power-down | |
| Temperature Sensor Accuracy | ±2°C (maximum error) | °C |
| Interface | SPI | |
| Operating Temperature Range | –40°C to +125°C | °C |
| Package | 10-VSSOP |
Key Features
- 12-bit noise-free resolution
- Programmable data rate: 128 SPS to 3300 SPS
- Single-cycle settling
- Internal low-drift voltage reference
- Internal high-accuracy temperature sensor with ±2°C maximum error
- Internal oscillator
- Programmable gain amplifier (PGA) with input ranges from ±256 mV to ±6.144 V
- Input multiplexer allowing measurement of two differential or four single-ended inputs
- Low current consumption: 150 μA in continuous mode and automatic power-down in single-shot mode
- Functional safety-capable and AEC-Q100 qualified for automotive applications
- Data transfer through SPI interface
Applications
- Battery management systems
- Automotive sensors:
- Thermocouples
- Resistance temperature detectors (RTDs)
- Electrochemical gas sensors
- Particulate matter sensors
Q & A
- What is the resolution of the ADS1018-Q1 ADC?
The ADS1018-Q1 has a 12-bit resolution.
- What is the maximum sample rate of the ADS1018-Q1?
The maximum sample rate is 3300 samples per second (SPS).
- What are the input channel configurations of the ADS1018-Q1?
The device can measure two differential or four single-ended inputs.
- What is the supply voltage range of the ADS1018-Q1?
The supply voltage range is from 2 V to 5.5 V.
- How does the current consumption vary between continuous and single-shot modes?
In continuous mode, the current consumption is 150 μA. In single-shot mode, the device automatically powers down after a conversion, significantly reducing current consumption during idle periods.
- What is the accuracy of the internal temperature sensor?
The internal temperature sensor has a maximum error of ±2°C.
- What interface does the ADS1018-Q1 use for data transfer?
The device uses a serial peripheral interface (SPI) for data transfer.
- What is the operating temperature range of the ADS1018-Q1?
The operating temperature range is from –40°C to +125°C.
- Is the ADS1018-Q1 qualified for automotive applications?
Yes, the ADS1018-Q1 is AEC-Q100 qualified for automotive applications.
- What are some common applications of the ADS1018-Q1?
Common applications include battery management systems and various automotive sensors such as thermocouples, RTDs, electrochemical gas sensors, and particulate matter sensors.
