component
ADS1115
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TI 16-bit I2C ADC, VSSOP-10. 4-ch, integrated PGA + reference, 860 SPS. Datasheet-verified.
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README
markdownADS1115
Texas Instruments · 16-bit I2C ADC · VSSOP-10
Precision, low-power 16-bit analog-to-digital converter with an I2C interface, in a VSSOP-10 package. It integrates a programmable gain amplifier, voltage reference, oscillator, and a programmable digital comparator, and measures four single-ended or two differential inputs at up to 860 samples per second. An address pin gives four I2C addresses. The default high-resolution ADC bolted onto any MCU that lacks one.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | ADDR | input | I2C target address select. Tie to GND, VDD, SDA, or SCL to select one of four 7-bit I2C addresses (0x48, 0x49, 0x4A, 0x4B). |
| 2 | ALERT/RDY | output | Comparator output or conversion-ready indicator (ADS1114 and ADS1115 only). Open-drain output; connect to VDD via a pullup resistor. |
| 3 | GND | power_in | Analog ground reference for the device. Connect to the system ground plane. |
| 4 | AIN0 | input | Analog input 0. Single-ended input or positive/negative side of a differential pair via the input MUX. Absolute input range GND to VDD; must not exceed VDD + 0.3V. |
| 5 | AIN1 | input | Analog input 1. Single-ended input or paired with AIN0 for differential measurement. Absolute input range GND to VDD. |
| 6 | AIN2 | input | Analog input 2 (ADS1115 only). Single-ended input or paired with AIN3 for differential measurement. Absolute input range GND to VDD. |
| 7 | AIN3 | input | Analog input 3 (ADS1115 only). Single-ended input or paired with AIN2 for differential measurement. Absolute input range GND to VDD. |
| 8 | VDD | power_in | Analog power supply, 2.0V to 5.5V. Connect a 0.1µF decoupling capacitor to GND close to the pin. |
| 9 | SDA | bidirectional | I2C serial data input/output (open-drain). Connect to VDD via a pullup resistor. Digital input voltage range GND to 5.5V. |
| 10 | SCL | input | I2C serial clock input. Connect to VDD via a pullup resistor. Supports Fast Mode (up to 400 kHz) and High-Speed Mode (up to 3.4 MHz). |
Key specifications
| Parameter | Value |
|---|---|
| Type | 16-bit delta-sigma ADC |
| Inputs | 4 single-ended / 2 differential |
| Interface | I2C (4 addresses) |
| Data rate | up to 860 SPS |
| Integrated | PGA, reference, oscillator, comparator |
| Supply voltage | 2.0-5.5 V |
| Package | VSSOP-10 |
| Body (L×W×H) | 3.0 × 3.0 × 1.1 mm |
Ordering variants
ADS1115IDGSR (VSSOP-10, tape & reel)ADS1115IDGST (VSSOP-10, small reel)
CAD (KiCad official)
- Symbol:
Analog_ADC:ADS1115IDGS - Footprint:
Package_SO:TSSOP-10_3x3mm_P0.5mm - 3D model: VSSOP/TSSOP-10 (KiCad packages3D)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (57 pp, sha256
5fe00cf9509daba7, retrieved 2026-08-17, tier: manufacturer) - Extractor:
ds2sf(Claude) — every pin and dimension is cited to a datasheet page; refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).