ADS1115 vs INA219: ADC or Current Monitor?
2026-10-18 · PartVane Electronics
The ADS1115IDGSR and INA219AIDR both talk I2C and both report 16-bit-class data, so they are often confused on a BOM. They do different jobs: the ADS1115 is a general-purpose ADC, the INA219 is a current and power monitor.
Key datasheet differences
| Item | ADS1115 | INA219 |
|---|---|---|
| Function | 16-bit delta-sigma ADC with PGA and comparator | Bidirectional current/power monitor with shunt and bus voltage measurement |
| Datasheet | TI SBAS444E (Dec 2024) | TI SBOS448G (Dec 2015) |
| Supply | 2.0V to 5.5V, 150µA in continuous mode | 3V to 5.5V, 1mA maximum |
| Measures | 4 single-ended or 2 differential inputs; PGA ranges ±256mV to ±6.144V | Bus voltage 0 to 26V; reports current, voltage and power |
| Speed | 8 to 860 SPS | Programmable conversion time and filtering |
| I2C addresses | Four pin-selectable | 16 programmable |
| Packages | X2QFN-10, SOT-10, VSSOP-10 (per TI family sheet) | SOT23-8, SOIC-8 |
Quote ADS1115IDGSR for your build
Send the quantity: we reply within 24 hours with price, availability and photos of the actual parts with the date code. Samples and small batches welcome. Comparing both? Quote INA219AIDR too.
How to choose
- Reading sensors, potentiometers, thermistor dividers or battery voltage: ADS1115.
- Measuring load current and power on a rail up to 26V with an external shunt resistor: INA219.
- Many designs use both: INA219 for the power rail, ADS1115 for analog sensors.
- The INA219 comes in grades A and B; B has tighter accuracy (0.5% maximum over temperature per TI). Confirm the grade on your BOM.
Check exact ordering codes, package and temperature grade against the current TI datasheet before purchase.
Sourcing both parts
Send your BOM with quantities and target package and we will check availability for ADS1115IDGSR and INA219AIDR. Request a quote.
Sources
- Texas Instruments ADS1113/ADS1114/ADS1115 datasheet SBAS444E (Dec 2024)
- Texas Instruments INA219 datasheet SBOS448G (Dec 2015)
Parts in This Article
- ADS1115IDGSR datasheet, pinout & specs – Texas Instruments
- INA219AIDR datasheet, pinout & specs – Texas Instruments