Overview
The ADS1115-Q1, 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 and ADS1114-Q1. The ADS1115-Q1 is notable for its high accuracy, low power consumption, and compact packaging, making it ideal for power- and space-constrained sensor measurement applications.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 16-bit |
| Sample Rate | 8 SPS to 860 SPS |
| Number of Channels | 4 single-ended or 2 differential inputs |
| Supply Voltage Range | 2.0 V to 5.5 V |
| Current Consumption | 150 µA (continuous-conversion mode) |
| Operating Temperature Range | –40°C to +125°C |
| Package Type | VSSOP (DGS) or UQFN (NKS) |
| Number of Pins | 10 |
| Interface | I2C with four pin-selectable addresses |
| Programmable Gain Amplifier (PGA) | Input ranges from ±256 mV to ±6.144 V |
| Internal Components | Low-drift voltage reference, oscillator, and digital comparator |
Key Features
- AEC-Q100 qualified for automotive applications with a temperature grade 1: –40°C to +125°C.
- Functional Safety-Capable.
- 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 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 (MUX) allowing two differential or four single-ended input measurements.
Applications
The ADS1115-Q1 is well suited for various applications, particularly in the automotive sector, due to its AEC-Q100 qualification and functional safety capabilities. Key applications include:
- Sensor measurement in power- and space-constrained environments.
- Voltage and current measurement in automotive systems, such as on-board chargers for hybrid-electric/electric vehicles.
- Industrial automation and control systems requiring precise analog-to-digital conversion.
- Medical devices that need low-power, high-accuracy ADCs.
Q & A
- What is the resolution of the ADS1115-Q1 ADC?
The ADS1115-Q1 has a resolution of 16 bits.
- What is the sample rate range of the ADS1115-Q1?
The sample rate ranges from 8 SPS to 860 SPS.
- How many channels does the ADS1115-Q1 support?
The ADS1115-Q1 supports 4 single-ended or 2 differential input channels.
- What is the supply voltage range for the ADS1115-Q1?
The supply voltage range is from 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 types of packages are available for the ADS1115-Q1?
The ADS1115-Q1 is available in VSSOP (DGS) and UQFN (NKS) packages.
- Does the ADS1115-Q1 have an internal voltage reference and oscillator?
- What interface does the ADS1115-Q1 use for communication?
The ADS1115-Q1 uses an I2C interface with four pin-selectable addresses.
- What are the input ranges of the programmable gain amplifier (PGA) in the ADS1115-Q1?
The PGA offers input ranges from ±256 mV to ±6.144 V.
