BringupDocumentation
ENDE
Open the editor
Behavioural mixed-signal modelADS1115IDGSRads1115

ADS1115 (16-bit ADC, 4 channels, I²C)

16-bit delta-sigma ADC: 4 single-ended or 2 differential inputs, programmable gain (±0.256 … ±6.144 V), 8–860 samples/s, single-shot or continuous, comparator / conversion-ready on ALERT/RDY. Converts the simulated input voltages averaged over the conversion time. Address 0x48–0x4B by ADDR. Read e.g. with Adafruit_ADS1X15.

Datasheet ti.com ↗Open the editor
AIN0AIN1AIN2AIN3SCLSDAADDRALERT/RDYVDDGNDADS1115IDGSR
Schematic symbol

Key data

Category
ICs
Simulation model
Behavioural mixed-signal model
Manufacturer part number
ADS1115IDGSR
Reference prefix
U
Pins
10
Land pattern
TSSOP-10_3x3mm_P0.5mm

Notes

  • Single-ended inputs measure against GND: choose the full scale (PGA) just above your signal for the best resolution.
  • Inputs must stay between GND and VDD even if the full scale is larger.

Simulation model

A behavioural model implements the interface of the chip (registers, protocol, timing) at its pins. The pins are connected to the analog circuit like CMOS pins.

Model
ads1115
Supply pins
VDD / GND

Pins 10

PinNameUse
AIN0AIN0Analog pinAnalog input 0 (GND … VDD)
AIN1AIN1Analog pinAnalog input 1 (GND … VDD)
AIN2AIN2Analog pinAnalog input 2 (GND … VDD)
AIN3AIN3Analog pinAnalog input 3 (GND … VDD)
SCLSCLInput pinI²C clock: pull-up (about 4.7 kΩ) to the supply
SDASDAI/O pinI²C data: pull-up (about 4.7 kΩ) to the supply
ADDRADDRInput pinAddress select: GND 0x48, VDD 0x49, SDA 0x4A, SCL 0x4B
ALERTALERT/RDYOutput pinComparator / conversion ready (open drain): pull-up resistor, or leave open
VDDVDDSupply pinSupply 2.0–5.5 V: 100 nF to GND
GNDGNDGround pinGround

PCB

Verified land patternTSSOP-10_3x3mm_P0.5mm
PackageLand patternStatusSource
VSSOP-10 · ADS1115IDGSRTSSOP-10_3x3mm_P0.5mmVerified land patternKiCad Package_SO:TSSOP-10_3x3mm_P0.5mm (TI DGS, cites the ADS1115 datasheet); pinout 1 ADDR, 2 ALERT/RDY, 3 GND, 4–7 AIN0–AIN3, 8 VDD, 9 SDA, 10 SCL