Mixed signal microchip ADS1115

multi-channel4 channelprogrammable

Overview The ADS1115 is a precision, low-power 16-bit I2C-compatible analog-to-digital converter (ADC) featuring an internal low-drift voltage reference and oscillator. The ADS1115 variant includes a programmable gain amplifier (PGA), a digital comparator and an input multiplexer (MUX) supporting four single-ended or two differential inputs. Conversion rates are programmable up to 860 samples per second (SPS), making the device suitable for high-resolution sensor measurement in power- and space-constrained systems.

Key features

• Resolution: 16 bits
• Programmable data rates: 8 SPS to 860 SPS (0.86 ksps)
• Inputs: 4 single-ended or 2 differential (input MUX)
• Programmable Gain Amplifier (PGA): input ranges ±256 mV to ±6.144 V
• Wide supply range: 2.0 V to 5.5 V (analog and digital)
• Low power: ~150 µA in continuous-conversion mode; typical power ~0.3 mW
• Internal low-drift voltage reference and internal oscillator
• Digital comparator (programmable) for threshold/alert functions
• I2C interface with four pin-selectable addresses
• Operating temperature: −40 °C to +125 °C

Applications

• High-resolution sensor data acquisition (temperature, pressure, flow, strain)
• Battery-powered and portable instrumentation
• Voltage/current monitoring and precision measurement
• Embedded systems and industrial data loggers with limited PCB area

Technical parameters
Resolution (bits): 16
Max sample rate: 860 SPS (0.86 ksps)
Number of input channels: 4 (multiplexed)
Interface: I2C (4 pin-selectable addresses)
Architecture: Delta-Sigma
Input type: Differential, Single-ended
PGA input ranges: ±256 mV … ±6.144 V
Supply voltage (analog/digital): 2.0 V to 5.5 V
Typical power consumption: ~0.3 mW (≈150 µA continuous conversion example)
Operating temperature range: −40 °C to +125 °C
Features: Comparator, Oscillator, Internal VREF, PGA, single-cycle settling


Package options

• X2QFN-10: ~2.0 mm × 1.5 mm × 0.4 mm
• SOT-10 (SOT-5X3): ~2.9 mm × 2.8 mm × 0.6 mm
• VSSOP-10: ~3.0 mm × 4.9 mm

Family

• ADS1113: single-channel (single-ended or differential) 16-bit ADC
• ADS1114: single-channel with PGA and programmable comparator
• ADS1115: four single-ended or two differential inputs with PGA and comparator (this product)