ADS1115IDGSR: The Definitive Guide to TI's 16-Bit I2C ADC

Admin · Aug 27, 2026 · 2 min read AI-Assisted · Updated: Aug 26, 2026 · Fact-Checked
ADS1115IDGSR: The Definitive Guide to TI's 16-Bit I2C ADC
ADS1115IDGSR is a 16-bit I2C ADC from Texas Instruments with PGA, internal reference, and oscillator. It offers 4 single-ended/2 differential inputs, 8-860 SPS, 2.0-5.5V supply, and is available now at $0.7636 (as of 2026-08-27).
ADS1115IDGSR

Quick Answers: What Is the ADS1115IDGSR and Why Does It Matter?

The ADS1115IDGSR is a precision, low-power, 16-bit analog-to-digital converter (ADC) from Texas Instruments, featuring an I2C-compatible interface, integrated programmable gain amplifier (PGA), low-drift voltage reference, oscillator, and digital comparator. It supports data rates from 8 to 860 samples per second, operates over a 2.0V to 5.5V supply range, and is housed in a 10-pin VSSOP (DGS) package. As of 2026-08-27, the ADS1115IDGSR is in stock at XAIPART with 99,999 units available, priced at $0.7636 per unit for quantities of 1000 or more. This makes it a go-to choice for engineers needing high-resolution, multi-channel analog measurement in space-constrained, battery-powered designs.

With four single-ended or two differential input channels, an input MUX, and four selectable I2C addresses (0x48–0x4B), the ADS1115IDGSR simplifies multi-sensor data acquisition. Its internal reference and oscillator eliminate external components, reducing BOM complexity. The device operates across -40°C to +125°C, making it suitable for industrial and automotive environments. This guide covers everything from selection and design-in to alternatives and market insights.

Technical Guide: How to Select, Design In, and Use the ADS1115IDGSR

Understanding the ADS1115IDGSR Architecture

The ADS1115IDGSR uses a delta-sigma architecture, which oversamples the input and applies noise shaping to achieve 16-bit resolution. This approach provides high accuracy and excellent noise performance, especially at lower data rates. The integrated PGA offers gains of 2/3, 1, 2, 4, 8, and 16 V/V, allowing small sensor signals to be amplified before conversion, effectively increasing resolution for low-level signals.

Key Specifications You Must Know

  • Resolution: 16 bits
  • Input Channels: 2 differential or 4 single-ended
  • Interface: I2C (addresses 0x48–0x4B)
  • Sampling Rate: 8 SPS to 860 SPS
  • PGA Gains: 2/3, 1, 2, 4, 8, 16 V/V
  • Supply Voltage: 2.0V to 5.5V
  • Operating Temperature: -40°C to +125°C
  • Package: 10-VSSOP (DGS)

Designing with the ADS1115IDGSR

When designing the ADS1115IDGSR into your circuit, follow these best practices:

  • Decoupling: Place a 0.1µF capacitor close to the VDD pin to filter high-frequency noise.
  • I2C Pull-ups: Use appropriate pull-up resistors on SDA and SCL lines (typically 2.2kΩ to 10kΩ) to ensure proper I2C communication.
  • Address Selection: Connect the ADDR pin to GND, VDD, SDA, or SCL to select one of four addresses (0x48–0x4B). This allows up to four ADS1115 devices on the same bus.
  • Input Filtering: For noisy environments, add a simple RC low-pass filter on each analog input to reduce aliasing and improve noise performance.
  • Source Impedance: Keep source impedance low (typically <10kΩ) to ensure the sample capacitor charges fully during acquisition.

Using the ADS1115IDGSR in Your Application

The ADS1115IDGSR is ideal for battery monitoring, portable instrumentation, IoT sensor nodes, temperature and pressure measurement, industrial process control, and medical monitoring. Its low power consumption and wide supply range make it perfect for battery-powered and energy-harvesting designs. The internal comparator can be configured to generate alerts on threshold crossings, reducing host processor overhead.

For example, in a battery voltage monitoring application, you can connect the battery voltage through a resistor divider to AIN0, set the PGA to gain 1, and configure the comparator to trigger an interrupt when the voltage drops below a threshold. This allows the microcontroller to sleep until an alert occurs, saving power.

Alternatives & Comparison: Drop-In Replacements for the ADS1115IDGSR

When selecting an ADC, you may consider alternatives that are pin-compatible and offer similar performance. The table below compares the ADS1115IDGSR with its verified drop-in alternatives from the XAIPART database.

ParameterADS1115IDGSRADS1115IDGSTADS1115QDGSRQ1ADS1114IDGSRADS1015IDGSRSGM58031XMS10G/TR
Resolution16 bits16 bits16 bits16 bits12 bits16 bits
Input Channels4 single-ended / 2 differential4 single-ended / 2 differential4 single-ended / 2 differential1 single-ended / 1 differential4 single-ended / 2 differential4 single-ended / 2 differential
InterfaceI2CI2CI2CI2CI2CI2C
Sampling Rate8–860 SPS8–860 SPS8–860 SPS8–860 SPS128–3300 SPS8–860 SPS
PGA Gains2/3, 1, 2, 4, 8, 16 V/V2/3, 1, 2, 4, 8, 16 V/V2/3, 1, 2, 4, 8, 16 V/V2/3, 1, 2, 4, 8, 16 V/V2/3, 1, 2, 4, 8, 16 V/V2/3, 1, 2, 4, 8, 16 V/V
Supply Voltage2.0–5.5V2.0–5.5V2.0–5.5V2.0–5.5V2.0–5.5V2.0–5.5V
Operating Temp-40°C to +125°C-40°C to +125°C-40°C to +125°C-40°C to +125°C-40°C to +125°C-40°C to +125°C
Package10-VSSOP10-VSSOP10-VSSOP10-VSSOP10-VSSOP10-MSOP
Automotive GradeNoNoYes (AEC-Q100)NoNoNo
Price (1k)$0.7636[DATA_NEEDED: price][DATA_NEEDED: price][DATA_NEEDED: price][DATA_NEEDED: price][DATA_NEEDED: price]

Summary: The ADS1115IDGST is a direct drop-in replacement with identical specs. The ADS1115QDGSRQ1 adds automotive qualification (AEC-Q100). The ADS1114IDGSR is a single-channel variant, while the ADS1015IDGSR offers 12-bit resolution. The SGM58031XMS10G/TR is a cross-brand alternative with similar specs but a different package (10-MSOP). Always verify pin compatibility before production.

Industry Insight: Market Position, Lifecycle, and Supply

The ADS1115IDGSR is an active product from Texas Instruments, indicating it is in full production and widely available. As of 2026-08-27, XAIPART lists 99,999 units in stock, with a base price of $0.7636 at 1000+ quantities. This suggests strong supply and competitive pricing.

Market demand for precision ADCs remains high due to the growth of IoT, portable medical devices, and industrial automation. The ADS1115IDGSR's combination of 16-bit resolution, low power, and I2C interface makes it a popular choice among designers. Its active lifecycle status ensures long-term availability and manufacturer support.

[DATA_NEEDED: Market share data for ADS1115IDGSR]

[DATA_NEEDED: Lead times from major distributors]

Trends & Outlook: What Buyers Should Watch

As the industry moves toward higher integration and lower power, the ADS1115IDGSR's internal reference and oscillator reduce external component count, aligning with miniaturization trends. The I2C interface remains a standard for low-speed sensors, ensuring compatibility with a wide range of microcontrollers.

Buyers should monitor pricing trends and availability. With a base price of $0.7636 (as of 2026-08-27), the ADS1115IDGSR offers excellent value for 16-bit precision. However, supply chain fluctuations could impact lead times, so it's wise to secure inventory early for high-volume projects.

Additionally, consider the automotive-grade variant ADS1115QDGSRQ1 for applications requiring AEC-Q100 qualification, as the automotive sector continues to adopt more sensors for ADAS and EV battery management.

Finally, keep an eye on cross-brand alternatives like the SGM58031XMS10G/TR, which may offer cost savings. Always validate pin compatibility and electrical performance before making a switch.

Frequently Asked Questions

The ADS1115IDGSR is a 16-bit, low-power, I2C-compatible analog-to-digital converter (ADC) from Texas Instruments. It features an internal PGA, reference, oscillator, and comparator, and comes in a 10-pin VSSOP package. According to the TI datasheet, it supports data rates up to 860 SPS and operates from 2.0V to 5.5V.
As of 2026-08-26, the ADS1115IDGSR is priced at approximately $3.45 for 1 unit, $3.10 for 10 units, $2.48 for 100 units, $2.10 for 500 units, and $1.77 for 1000 units at major distributors like DigiKey and Mouser. Prices may vary by quantity and supplier.
The ADS1115IDGSR is available from authorized distributors including DigiKey, Mouser, and TI.com. As of 2026-08-26, DigiKey lists it as 'ships today' with stock available. You can also check XAIPART for competitive pricing and availability.
The typical lead time for ADS1115IDGSR from major distributors like DigiKey and Mouser is 1-2 days for in-stock items. For larger quantities, lead times may extend to 4-6 weeks depending on supply. As of 2026-08-26, stock is available at multiple distributors.
Yes, as of 2026-08-26, the ADS1115IDGSR is in stock at DigiKey, Mouser, and other distributors. For example, icDirectory reports 43,000 pieces in stock, and Heisener lists 185,820 pieces. Availability can change, so check current stock before ordering.
The ADS1115IDGSR and ADS1115IDGST are functionally identical in performance, both being 16-bit I2C ADCs in a 10-VSSOP package. The difference lies in packaging: the 'R' suffix indicates tape and reel, while the 'T' suffix indicates a different reel size. According to Xecor, no measurable differences were detected in primary technical parameters.
The ADS1115IDGSR and ADS1114IDGSR are both 16-bit I2C ADCs in VSSOP-10, but the ADS1115 has 4 input channels (2 differential or 4 single-ended) while the ADS1114 has only 1 input channel. The ADS1115 also includes an input MUX, making it better for multi-sensor applications. Both share the same package and pinout.
Choose the ADS1115IDGSR when you need multiple input channels (up to 4 single-ended or 2 differential) for monitoring several sensors or signals. The ADS1114IDGSR is suitable for single-channel applications where cost or simplicity is prioritized. Both are pin-compatible, so you can upgrade without PCB changes.
The best drop-in replacement for ADS1115IDGSR is the ADS1115IDGST, which is functionally identical and pin-compatible. Other drop-in options include the ADS1115QDGSRQ1 (automotive grade) and the ADS1015IDGSR (12-bit version) if lower resolution is acceptable. Cross-brand alternatives like the SGM58031XMS10G/TR also exist.
Yes, the ADS1115IDGST is a direct drop-in replacement for the ADS1115IDGSR. Both are 16-bit I2C ADCs in the same VSSOP-10 package with identical pinout and electrical specifications. The only difference is the tape and reel packaging, which does not affect performance.
The ADS1115IDGSR datasheet is available for download from TI.com at https://www.ti.com/lit/ds/symlink/ads1115.pdf. It is also available on alldatasheet.com and datasheets.com. The datasheet (Rev. E) provides full specifications, pinout, and application information.
The ADS1115IDGSR pinout is detailed in the TI datasheet (Rev. E) available at https://www.ti.com/lit/ds/symlink/ads1115.pdf. The 10-pin VSSOP package includes pins for I2C (SDA, SCL), analog inputs (AIN0-AIN3), address selection (ADDR), and power (VDD, GND).
The ADS1115IDGSR can be replaced by the ADS1115IDGST (identical), ADS1115QDGSRQ1 (automotive grade), or ADS1015IDGSR (12-bit version) from Texas Instruments. Cross-brand alternatives include the SGM58031XMS10G/TR from SGMC. All are pin-compatible drop-in replacements in the VSSOP-10 package.
Yes, the ADS1115IDGSR and ADS1115IDGST are functionally identical. Both are 16-bit I2C ADCs with the same specifications and VSSOP-10 package. The only difference is the packaging format: 'R' denotes tape and reel, while 'T' denotes a different reel size. They are interchangeable in designs.
The ADS1115IDGSR is a 16-bit delta-sigma ADC with I2C interface, 4 input channels (2 differential or 4 single-ended), programmable gain amplifier (PGA) with gains up to 16 V/V, internal reference and oscillator, and data rates up to 860 SPS. It operates from 2.0V to 5.5V and in -40C to +125C, making it suitable for precision industrial and portable applications.
The best SGMC equivalent for ADS1115IDGSR is the SGM58031XMS10G/TR, which is a 16-bit I2C ADC in a similar package. According to icyi.com, it is a replacement part with good quality and lower cost. Verify pin compatibility before production use.

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