ADS1115-Q1

Part: ADS1113 / ADS1114 / ADS1115 (ADS111x) — Texas Instruments

Type: 16-Bit Delta-Sigma ADC with I²C Interface

Description: 2.0–5.5 V supply, 16-bit, I²C-compatible ADC with up to 860 SPS, internal reference and oscillator, and 150 μA typical operating current. The ADS1114 and ADS1115 add a PGA and programmable comparator.

Operating Conditions:

• Supply voltage: 2.0–5.5 V
• Operating ambient temperature: -40 to 125 °C
• Full-scale input range: ±0.256 V to ±6.144 V (PGA on ADS1114/ADS1115)
• I²C SCL frequency: up to 0.4 MHz (fast mode), up to 3.4 MHz (high-speed mode)

Absolute Maximum Ratings:

• Power-supply voltage (VDD to GND): -0.3 to 7 V
• Analog input voltage: GND - 0.3 V to VDD + 0.3 V
• Digital input voltage (SDA, SCL, ADDR, ALERT/RDY): GND - 0.3 V to 5.5 V
• Continuous input current, any pin except power: ±10 mA
• Junction temperature: -40 to 150 °C
• Storage temperature: -60 to 150 °C
• ESD: ±2000 V HBM, ±500 V CDM

Key Specs:

• Resolution: 16 bits, no missing codes
• Data rates: 8 to 860 SPS (variation ±10%)
• Supply current, operating: 150 μA typ, 200 μA max at 25 °C, 300 μA max over temperature (VDD = 3.3 V)
• Supply current, power-down: 0.5 μA typ, 2 μA max at 25 °C, 5 μA max over temperature
• Power dissipation: 0.5 mW typ at VDD = 3.3 V (0.9 mW at 5.0 V, 0.3 mW at 2.0 V)
• INL: 1 LSB max (DR = 8 SPS, FSR = ±2.048 V)
• Offset error: ±1 LSB typ, ±3 LSB max (differential inputs, FSR = ±2.048 V)
• Gain error: 0.01% typ, 0.15% max (FSR = ±2.048 V, 25 °C)
• Gain drift: 5 ppm/°C typ, 40 ppm/°C max
• CMRR: 105 dB typ at DC (FSR = ±0.256 V)
• Digital VOL: 0.15 V typ, 0.4 V max (IOL = 3 mA)

Features:

• Ultra-small packages (X2QFN 2 mm × 1.5 mm × 0.4 mm; SOT 2.9 mm × 2.8 mm × 0.6 mm)
• Internal low-drift voltage reference and internal oscillator
• Single-cycle settling
• I²C interface with four pin-selectable addresses
• ADS1113: one single-ended or differential input
• ADS1114: one single-ended or differential input with PGA and comparator
• ADS1115: four single-ended or two differential inputs with PGA, MUX and comparator

Applications:

• Portable instrumentation
• Battery voltage and current monitoring
• Temperature measurement systems
• Consumer electronics
• Factory automation and process control

Package:

• RUG (X2QFN, 10-pin), 1.50 mm × 2.00 mm
• DYN (SOT, 10-pin), 2.90 mm × 2.80 mm
• DGS (VSSOP, 10-pin), 3.00 mm × 4.90 mm

• Ultra-small packages:
• -X2QFN: 2mm × 1.5mm × 0.4mm
• -SOT: 2.9mm × 2.8mm × 0.6mm
• Wide supply range: 2.0V to 5.5V
• Low current consumption: 150μA (continuous-conversion mode)
• Programmable data rate: 8SPS to 860SPS
• Single-cycle settling
• Internal low-drift voltage reference
• Internal oscillator
• I 2 C interface: four pin-selectable addresses
• Operating temperature range:
• -40°C to +125°C
• Family of devices:
• -ADS1113: one single-ended (SE) or differential (DE) input
• -ADS1114: one single-ended or differential input with comparator and PGA
• -ADS1115: four single-ended or two differential inputs with comparator and PGA

• Portable instrumentation
• Battery voltage and current monitoring
• Temperature measurement systems
• Consumer electronics
• Factory automation and process control

Figure 4-1. RUG Package, 10-Pin (Top View)

Figure 4-2. DYN and DGS Packages, 10-Pin (Top View)

Table 4-1. Pin Functions: RUG, DYN, and DGS Packages

• (1) See the Unused Inputs and Outputs section for unused pin connections.

at VDD = 3.3V, data rate = 8SPS, and full-scale input voltage range (FSR) = ±2.048V (unless otherwise noted); maximum and minimum specifications apply from TA = -40°C to +125°C; typical specifications are at TA = 25°C

over operating ambient temperature range (unless otherwise noted) (1)

The following sections give example circuits and suggestions for using the ADS111x in various situations.

• (1) For more information, see Section 14.
• (2) The package size (length × width) is a nominal value and includes pins, where applicable.