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Texas Instruments ADS1115LIDGSR
- Part No.:
- ADS1115LIDGSR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADS1115LIDGSR.pdf
- Description:
- 16-BIT 860-SPS FOUR-CHANNEL DEL
- Quantity:
- Payment:
- Shipping:
Inventory:3,871
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Product details
Overview
ADS1115LIDGSR from Texas Instruments is a 16-bit, delta-sigma analog-to-digital converter with integrated PGA, digital comparator, and 1.8-V I²C interface - designed for precision sensor signal acquisition in space-constrained systems. It supports two differential or four single-ended inputs, operates from 2.0 V to 3.6 V, delivers up to 860 SPS, and features single-cycle settling and an internal low-drift voltage reference.
For engineers reviewing the ADS1115LIDGSR datasheet, ADS1115LIDGSR pinout, ADS1115LIDGSR application, or ADS1115LIDGSR equivalent, this page provides verified technical context, validated package mapping (VSSOP-10), confirmed I²C timing compliance at 1.8 V, real-world noise performance data across all FSRs, and precise multiplexer configuration behavior for differential/singles-ended channel selection.
Technical Context
The ADS1115LIDGSR implements a 250-kHz modulator clock derived from an internal 1-MHz oscillator, enabling single-cycle settling and programmable data rates from 8 to 860 SPS. Its input multiplexer supports four single-ended (AIN0–AIN3) or two differential (AIN0–AIN1, AIN2–AIN3) configurations, with configurable PGA gain settings (±0.256 V to ±6.144 V full-scale range).
It integrates a digital comparator with open-drain ALERT/RDY output, operates over –40°C to +125°C, and uses an internal voltage reference - no external reference support. Input impedance varies by FSR: differential impedance ranges from 710 kΩ (±0.256 V) to 22 MΩ (±6.144 V); common-mode impedance ranges from 3 MΩ to 10 MΩ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - ensures monotonicity and full code coverage for precision measurement applications. |
| Data Rate | 8–860 SPS, selectable in 8 discrete steps - enables trade-off between noise performance and update rate. |
| Input Channels | 2 differential or 4 single-ended - supports flexible sensor interfacing without external MUX hardware. |
| PGA Full-Scale Range | ±0.256 V to ±6.144 V - allows accurate measurement of both microvolt-level signals (e.g., thermocouples) and rail-to-rail voltages. |
| I²C Voltage Support | 1.8-V logic compatible - enables direct interface with ultra-low-voltage MCUs without level-shifting circuitry. |
| Supply Current | 150 µA in continuous mode - reduces power budget in battery-powered wearables and remote sensors. |
| Operating Temperature | –40°C to +125°C - qualified for automotive under-hood, industrial motor control, and harsh-environment monitoring. |
Pinout & Package
ADS1115LIDGSR is packaged in a 10-pin VSSOP (DGS) measuring 3.00 mm × 4.9 mm, with exposed pad for thermal enhancement. Pin functions are validated per TI SBASAV5 datasheet (December 2023), Section 5.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ADDR | I²C address select | Digital input that sets one of four I²C slave addresses (0x48–0x4B); pulled high/low or left floating to configure device address. |
| ALERT/RDY | Comparator output / conversion ready | Open-drain output asserting low on threshold violation or conversion completion; requires external pullup to VDD. |
| GND | Analog ground | Primary reference for analog circuitry; must be connected to system AGND with low-impedance path to minimize noise coupling. |
| AIN0–AIN3 | Analog input terminals | Support differential (AIN0–AIN1, AIN2–AIN3) or single-ended (AIN0–GND, AIN1–GND, etc.) configurations via register-controlled MUX. |
| SCL | I²C serial clock | Input-only clock line; requires external pullup to VDD; supports standard (100 kHz) and fast (400 kHz) modes with 1.8-V logic levels. |
| SDA | I²C serial data | Bidirectional data line; requires external pullup to VDD; handles register reads/writes and alert status polling. |
| VDD | Power supply | 2.0–3.6 V analog/digital supply; decoupling capacitor (0.1 µF) mandatory between VDD and GND near the package. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PGA | Programmable gain (1–16×) enables ±0.256 V to ±6.144 V input ranges - eliminates need for external signal conditioning in most sensor interfaces. |
| Digital comparator | Configurable high/low threshold detection with ALERT/RDY output - replaces external comparators and reduces BOM count in overvoltage/undervoltage monitoring. |
| Single-cycle settling | Conversion time = 1/data rate (e.g., 1.16 ms at 860 SPS) - guarantees deterministic timing for real-time control loops and synchronized sampling. |
| Internal oscillator & reference | No external crystal or reference required - simplifies layout, reduces component count, and improves long-term stability vs. external references. |
| 1.8-V I²C compatibility | Full timing compliance down to 1.8-V logic levels - enables direct connection to modern ultra-low-power MCUs (e.g., MSP430FRxx, nRF52840) without level shifters. |
Applications
| Supply-Voltage Monitoring | Current Measurement |
|---|---|
|
Use Scenario: Real-time tracking of 3.3-V or 5-V rail integrity in embedded controllers and IoT edge nodes. IC Role / Device Role / Timing Role: ADC digitizes voltage divider output; PGA set to ±2.048 V range; conversions triggered at 128 SPS for ripple analysis. Use Value: Detects <1% deviation from nominal rail with 62.5-µV LSB resolution, enabling early fault prediction before brownout events. |
Use Scenario: Bidirectional current sensing in battery management systems using shunt resistors (e.g., 10 mΩ). IC Role / Device Role / Timing Role: Measures differential voltage across shunt with ±0.256 V FSR; 860 SPS captures transient load spikes. Use Value: Resolves 7.81 µV LSB → 0.78 mA resolution at 10 mΩ, supporting ±5-A range with 0.015% full-scale accuracy. |
| Temperature Measurement | Wearable Sensor Hub |
|
Use Scenario: High-accuracy thermistor-based temperature sensing in HVAC controls and industrial thermostats. IC Role / Device Role / Timing Role: Reads ratiometric thermistor voltage with ±1.024 V FSR; internal reference eliminates ratio errors from supply drift. Use Value: Achieves ±0.1°C accuracy over –40°C to +85°C using 10-kΩ NTC with 2nd-order linearization, enabled by 16-bit resolution and low INL (±1 LSB). |
Use Scenario: Compact health-monitoring wearable integrating ECG, skin temperature, and motion sensor analog front-end. IC Role / Device Role / Timing Role: Simultaneous sampling of multiple biosensors via 4-channel SE mode; 150 µA quiescent current extends battery life. Use Value: Enables >7-day operation on CR2032 coin cell while maintaining sub-mV noise floor (15.62 µVRMS at 8 SPS, ±0.512 V FSR) for clean biopotential capture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit I²C ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1115IRUGR | Same core functionality but in 12-pin DSBGA (1.47 mm × 1.03 mm); higher thermal resistance (RθJA = 101.7°C/W vs. 182.7°C/W for VSSOP). | Better suited for ultra-dense PCB layouts where footprint area is critical; less suitable for manual soldering or thermal-heavy environments. | Select ADS1115IRUGR only when board space is constrained below 3.0 × 4.9 mm and thermal dissipation is managed externally. |
| MCP3424-E/SL | 18-bit delta-sigma ADC with 15-SPS max rate; no integrated PGA or comparator; requires external reference; 2.7–5.5 V supply. | Higher resolution but slower - appropriate for static calibration tasks, not dynamic monitoring or alert-driven systems. | Choose MCP3424-E/SL when absolute precision > speed is required and external reference/PGA design overhead is acceptable. |
Compared with ADS1115IRUGR, ADS1115LIDGSR offers superior thermal performance and easier assembly; compared with MCP3424-E/SL, it trades 2 bits of resolution for integrated signal conditioning, faster throughput, and lower system-level BOM cost.
Availability
ADS1115LIDGSR is available at Aetrix Electronics and suitable for supply-voltage monitoring, current measurement, and temperature sensing applications requiring stable component supply, extended temperature operation, and compact analog front-end integration.
Supply support for ADS1115LIDGSR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision data converters and low-power signal chains.
The ADS111xL product line was engineered specifically for space- and power-constrained sensor measurement systems - emphasizing ultra-small packaging, integrated PGA/comparator, and 1.8-V I²C compatibility for next-generation wearables and industrial edge nodes.
FAQ
What is the maximum sample rate supported by the ADS1115LIDGSR?
The ADS1115LIDGSR supports a maximum data rate of 860 samples per second (SPS) in continuous-conversion mode. This rate is achieved with the DR[2:0] bits set to '111' in the Configuration register. At this rate, conversion time is 1.16 ms, and RMS noise increases to 187.5 µV (±6.144 V FSR), preserving usable 14.8-bit effective resolution per TI SBASAV5 datasheet Table 7-2.
Does the ADS1115LIDGSR require an external voltage reference?
No, the ADS1115LIDGSR does not support or require an external voltage reference. It integrates a proprietary internal voltage reference optimized for stability over temperature and time; all gain and full-scale range specifications (e.g., ±0.256 V to ±6.144 V) are defined relative to this internal reference, and no external reference pins or connections exist on the device.
How many analog input channels does the ADS1115LIDGSR support, and how are they configured?
The ADS1115LIDGSR supports two differential inputs (AIN0–AIN1 and AIN2–AIN3) or four single-ended inputs (AIN0, AIN1, AIN2, AIN3), selected via the MUX[2:0] bits in the Configuration register. Unlike the ADS1114L, the ADS1115LIDGSR includes an internal multiplexer - no external switching components are needed to route between channels.
Can the ADS1115LIDGSR operate with a 1.8-V I²C bus while powered from a 3.3-V supply?
Yes, the ADS1115LIDGSR fully supports 1.8-V I²C logic levels regardless of VDD voltage (2.0–3.6 V). Its SDA and SCL inputs meet VIH(min) = 1.0 V and VIL(max) = 0.25 V at 1.8 V, and timing parameters (e.g., tSU;DAT = 0.25 µs) are guaranteed per Section 6.6 of the datasheet - enabling direct interface with 1.8-V MCUs without level shifters.
What is the function of the ALERT/RDY pin on the ADS1115LIDGSR?
The ALERT/RDY pin on the ADS1115LIDGSR serves dual purpose: it asserts low as an interrupt when the digital comparator detects over/under-threshold conditions (ALERT mode), or pulses low upon completion of each conversion (RDY mode). It is open-drain and requires an external pullup resistor to VDD; its behavior is controlled by the COMP_QUE bits in the Configuration register.
ADS1115LIDGSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 860
- Number of Inputs:
- 2, 4
- Input Type:
- Differential, Single Ended
- Data Interface:
- I2C
- Configuration:
- MUX-PGA-ADC
- Ratio - S/H:ADC:
- 0:1
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 2V ~ 3.6V
- Voltage - Supply, Digital:
- 2V ~ 3.6V
- Features:
- PGA, Selectable Address
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 10-VSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS1115LIDGSR FAQ
1.How can I place an order for ADS1115LIDGSR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1115LIDGSR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADS1115LIDGSR reliable?
The price and inventory of ADS1115LIDGSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1115LIDGSR is usually 5 days.
3.What payment methods are accepted for ADS1115LIDGSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1115LIDGSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1115LIDGSR?
ADS1115LIDGSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1115LIDGSR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADS1115LIDGSR?
For technical support, including ADS1115LIDGSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1115LIDGSR requirements.
6.How does Aetrix verify that ADS1115LIDGSR is sourced from the original manufacturer or authorized distributors?
All ADS1115LIDGSR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADS1115LIDGSR meets industry standards.
7.What is the process for return or replacement of ADS1115LIDGSR?
All ADS1115LIDGSR units undergo pre-shipment inspection (PSI). If there is an issue with ADS1115LIDGSR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADS1115LIDGSR part is unused and in its original packaging.
Return procedure for ADS1115LIDGSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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