A 12-bit analog-to-digital converter with an I2C interface, in VSSOP-10, the faster, lower-resolution sibling of the 16-bit ADS1115 (same pinout and registers). It has four single-ended or two differential inputs, an on-chip programmable-gain amplifier that scales small signals down to millivolts full-scale, and an internal reference and oscillator so it needs no external support. A built-in comparator can flag threshold crossings on the ALERT/RDY pin without host polling, and it samples up to 3300 times per second. An address pin puts four on one bus. Runs 2.0-5.5 V.

Pinout

Pin	Name	Type	Function
1	ADDR	input	I2C target (slave) address select. Tie to GND, VDD, SDA, or SCL to select one of four I2C addresses (0x48, 0x49, 0x4A, 0x4B).
2	ALERT/RDY	output	Comparator output or conversion-ready output. Open-drain, requires an external pullup resistor to VDD. Signals over/under-voltage conditions or that a new conversion result is available.
3	GND	power_in	Analog ground reference for the device.
4	AIN0	input	Analog input 0. Selectable as single-ended input or as the positive input of a differential pair. Absolute input range GND to VDD.
5	AIN1	input	Analog input 1. Selectable as single-ended input or as the negative input of a differential pair with AIN0. Absolute input range GND to VDD.
6	AIN2	input	Analog input 2 (ADS1015 only). Selectable as single-ended input or as the positive input of a differential pair with AIN3. Absolute input range GND to VDD.
7	AIN3	input	Analog input 3 (ADS1015 only). Selectable as single-ended input or as the negative input of a differential pair with AIN2. Absolute input range GND to VDD.
8	VDD	power_in	Power-supply input, 2.0 V to 5.5 V. Bypass with a 0.1 µF decoupling capacitor to GND placed close to the pin.
9	SDA	bidirectional	I2C serial data input/output. Open-drain; requires an external pullup resistor to VDD.
10	SCL	input	I2C serial clock input. Requires an external pullup resistor to VDD.

Key specifications

Parameter	Value
Type	4-channel SAR ADC
Resolution	12-bit
Inputs	4 single-ended or 2 differential
PGA	yes (±0.256 to ±6.144 V FS)
Sample rate	up to 3300 sps
Interface	I2C + ALERT/RDY
Supply voltage	2.0-5.5 V
Package	VSSOP-10

Ordering variants

ADS1015IDGSR (VSSOP-10)
ADS1015IDGST (VSSOP-10, small reel)

CAD (KiCad official)

Symbol: Analog_ADC:ADS1015IDGS
Footprint: Package_SO:TSSOP-10_3x3mm_P0.5mm
3D model: TSSOP-10 / VSSOP-10 (KiCad packages3D)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Texas Instruments datasheet (50 pp, sha256 a5cb3720275767b1, retrieved 2026-08-17, tier: manufacturer)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF