Overview
The ADS1115BQDGSRQ1, produced by Texas Instruments, is a precision, low-power, 16-bit analog-to-digital converter (ADC) designed for automotive and other demanding applications. This device is part of the ADS111x-Q1 family, which includes the ADS1113-Q1, ADS1114-Q1, and ADS1115-Q1. The ADS1115-Q1 is particularly notable for its ability to handle four single-ended or two differential input measurements, making it versatile for various sensor measurement tasks.
It features an internal low-drift voltage reference, an internal oscillator, and an I2C interface with four pin-selectable addresses. The device is AEC-Q100 qualified for automotive applications, with a temperature grade 1 rating of –40°C to +125°C, and is also functional safety-capable. Its wide supply range of 2.0 V to 5.5 V and low current consumption of 150 µA in continuous-conversion mode make it suitable for power- and space-constrained applications.
Key Specifications
| Parameter | Description |
|---|---|
| Resolution | 16-bit |
| Sample Rate | 8 SPS to 860 SPS |
| Input Channels | 4 single-ended or 2 differential |
| Supply Voltage | 2.0 V to 5.5 V |
| Current Consumption | 150 µA (continuous-conversion mode) |
| Operating Temperature Range | –40°C to +125°C |
| Package | VSSOP-10 |
| Interface | I2C with four pin-selectable addresses |
| Programmable Gain Amplifier (PGA) | Input ranges from ±256 mV to ±6.144 V |
| Digital Comparator | For under- and overvoltage detection |
Key Features
- AEC-Q100 qualified for automotive applications with a temperature grade 1 rating of –40°C to +125°C.
- Functional Safety-Capable with documentation available to aid in functional safety system design.
- Wide supply range: 2.0 V to 5.5 V.
- Low current consumption: 150 µA in continuous-conversion mode.
- Programmable data rate: 8 SPS to 860 SPS.
- Single-cycle settling.
- Internal low-drift voltage reference and internal oscillator.
- I2C interface with four pin-selectable addresses.
- Programmable gain amplifier (PGA) with input ranges from ±256 mV to ±6.144 V.
- Digital comparator for under- and overvoltage detection.
- Input multiplexer allowing two differential or four single-ended input measurements.
Applications
- Automotive center information displays and cluster displays.
- Camera modules without processing.
- General-purpose voltage and current monitoring.
- Power- and space-constrained sensor measurement applications.
Q & A
- What is the resolution of the ADS1115-Q1 ADC?
The ADS1115-Q1 has a 16-bit resolution.
- What is the sample rate range of the ADS1115-Q1?
The sample rate ranges from 8 SPS to 860 SPS.
- How many input channels does the ADS1115-Q1 support?
The ADS1115-Q1 supports four single-ended or two differential input channels.
- What is the operating supply voltage range of the ADS1115-Q1?
The operating supply voltage range is 2.0 V to 5.5 V.
- What is the current consumption of the ADS1115-Q1 in continuous-conversion mode?
The current consumption is 150 µA in continuous-conversion mode.
- What is the operating temperature range of the ADS1115-Q1?
The operating temperature range is –40°C to +125°C.
- What type of interface does the ADS1115-Q1 use?
The ADS1115-Q1 uses an I2C interface with four pin-selectable addresses.
- Does the ADS1115-Q1 have a programmable gain amplifier (PGA)?
Yes, the ADS1115-Q1 includes a PGA with input ranges from ±256 mV to ±6.144 V.
- What is the purpose of the digital comparator in the ADS1115-Q1?
The digital comparator is used for under- and overvoltage detection.
- Is the ADS1115-Q1 suitable for automotive applications?
Yes, the ADS1115-Q1 is AEC-Q100 qualified for automotive applications and is functional safety-capable.
