Specifications
| Type | Description |
|---|---|
| Part Number | ADS1115 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Package / Case | RUG X2QFN-10 1.50 mm × 2.00 mm; DYN SOT-10 2.90 mm × 2.80 mm; DGS VSSOP-10 3.00 mm × 4.90 mm |
| Resolution | 16 bits; no missing codes |
| Maximum Sample Rate | 860 SPS; ADS1115 device comparison table |
| Programmable Data Rates | 8, 16, 32, 64, 128, 250, 475, 860 SPS; VDD = 3.3 V, FSR = ±2.048 V unless otherwise noted |
| Data Rate Variation | ±10%; all data rates |
| Input Channels | 2 differential or 4 single-ended; ADS1115 |
| Interface | I2C-compatible; ADS1115 device family |
| I2C Address Selection | 4 pin-selectable addresses; ADDR pin |
| Supply Voltage | 2.0 V to 5.5 V; recommended operating conditions, VDD to GND |
| Operating Ambient Temperature | -40°C to +125°C; recommended operating conditions |
| Full-Scale Input Voltage Range | ±0.256 V to ±6.144 V; VIN = V(AINP) - V(AINN), ADC scaling range |
| Absolute Analog Input Voltage | GND to VDD; recommended operating conditions, AINx |
| Supply Current | 150 µA typ, 200 µA max at TA = 25°C; 300 µA max over temperature; operating mode |
| Power-Down Supply Current | 0.5 µA typ, 2 µA max at TA = 25°C; 5 µA max over temperature; power-down mode |
| Power Dissipation | 0.9 mW; VDD = 5.0 V |
| Power Dissipation | 0.5 mW; VDD = 3.3 V |
| Power Dissipation | 0.3 mW; VDD = 2.0 V |
| Integral Nonlinearity | 1 LSB; DR = 8 SPS, FSR = ±2.048 V; best-fit INL covers 99% of full-scale |
| Offset Error | -3 LSB min, ±1 LSB typ, 3 LSB max; FSR = ±2.048 V, differential inputs |
| Offset Error | ±3 LSB; FSR = ±2.048 V, single-ended inputs |
| Offset Drift | 0.005 LSB/°C; FSR = ±2.048 V |
| Long-Term Offset Drift | ±1 LSB; FSR = ±2.048 V, TA = 125°C, 1000 hours |
| Offset Power-Supply Rejection | 1 LSB/V; FSR = ±2.048 V, DC supply variation |
| Gain Error | 0.01% typ, 0.15% max; FSR = ±2.048 V, TA = 25°C; includes PGA and voltage reference errors |
| Gain Drift | 5 ppm/°C typ, 40 ppm/°C max; FSR = ±2.048 V |
| Common-Mode Rejection Ratio | 100 dB; at DC, FSR = ±2.048 V |
| SCL Clock Frequency | 0.01 MHz to 0.4 MHz; I2C fast mode, VDD = 2.0 V to 5.5 V |
| SCL Clock Frequency | 0.01 MHz to 3.4 MHz; I2C high-speed mode, VDD = 2.0 V to 5.5 V |
| Datasheet Status | request_only |
Product Overview
The ADS1115 is a Texas Instruments 16-bit I2C ADC in the Signal_Chain category. It provides no-missing-codes 16-bit resolution and supports 2 differential or 4 single-ended input channels, making it suitable for multiplexed voltage measurement tasks within the stated analog input limits.
The ADC includes programmable data rates of 8, 16, 32, 64, 128, 250, 475, and 860 SPS, with ±10% data-rate variation across all settings. The ADC scaling range supports full-scale input ranges from ±0.256 V to ±6.144 V, while the absolute analog input voltage range is GND to VDD.
The device operates from 2.0 V to 5.5 V and over -40°C to +125°C ambient temperature. Package options include RUG X2QFN-10 1.50 mm × 2.00 mm, DYN SOT-10 2.90 mm × 2.80 mm, and DGS VSSOP-10 3.00 mm × 4.90 mm. I2C operation includes four ADDR-pin-selectable addresses, fast-mode SCL operation to 0.4 MHz, and high-speed-mode SCL operation to 3.4 MHz.
Key Features
- 16-bit ADC resolution with no missing codes
- Up to 860 SPS maximum sample rate
- Programmable data rates from 8 SPS to 860 SPS
- Supports 2 differential or 4 single-ended inputs
- I2C-compatible interface with four pin-selectable addresses
- Operates from 2.0 V to 5.5 V supply
- Ambient operating range from -40°C to +125°C
- ADC full-scale range from ±0.256 V to ±6.144 V
- 150 µA typical current in operating mode
- 0.5 µA typical current in power-down mode
- 100 dB DC common-mode rejection ratio
Typical Applications
- Differential voltage measurement
- Single-ended voltage measurement
- Low-power sensor acquisition
- I2C-connected data acquisition
- Multi-channel analog monitoring
- Temperature-range instrumentation
- Battery-supplied measurement nodes
FAQ
What resolution does the ADS1115 provide?
The ADS1115 provides 16-bit ADC resolution with no missing codes according to the extracted datasheet facts. It is specified as a 16-bit I2C ADC in the Texas Instruments Signal_Chain category.
How many inputs can the ADS1115 measure?
The ADS1115 supports 2 differential input channels or 4 single-ended input channels. The absolute analog input voltage range is specified from GND to VDD under the recommended operating conditions.
What data rates are programmable on the ADS1115?
Programmable data rates are 8, 16, 32, 64, 128, 250, 475, and 860 SPS. The extracted datasheet facts list ±10% data-rate variation across all data-rate settings.
What supply voltage range does the ADS1115 support?
The ADS1115 recommended operating supply range is 2.0 V to 5.5 V from VDD to GND. Power dissipation is listed as 0.3 mW at 2.0 V, 0.5 mW at 3.3 V, and 0.9 mW at 5.0 V.