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Texas Instruments ADS1115QDGSRQ1
- Part No.:
- ADS1115QDGSRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADS1115QDGSRQ1.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,093
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Product details
Overview
ADS1115QDGSRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (–40°C to +125°C) automotive-qualified, 16-bit delta-sigma ADC with integrated PGA, voltage reference, oscillator, and I²C interface. It supports up to 860 SPS, 4 single-ended or 2 differential inputs, and programmable comparator functionality - enabling precise sensor monitoring in space-constrained automotive displays and camera modules.
For engineers reviewing the ADS1115QDGSRQ1 datasheet, ADS1115QDGSRQ1 pinout, ADS1115QDGSRQ1 application, or ADS1115QDGSRQ1 equivalent, key selection criteria include its ±0.256 V to ±6.144 V programmable input range, 150 µA operating current, single-cycle settling, internal reference stability, and dual-package availability (VSSOP-10 and UQFN-10) for layout flexibility in safety-critical automotive systems.
Technical Context
The ADS1115QDGSRQ1 implements a delta-sigma modulation architecture with digital filtering, delivering 16-bit no-missing-codes resolution and single-cycle settling. Its integrated PGA provides eight programmable gain settings (1–16), enabling high-precision measurement of both microvolt-level and rail-to-rail analog signals without external amplification.
It features a dedicated ALERT/RDY pin for comparator-driven event notification and supports four I²C slave addresses via ADDR pin configuration. The device operates across 2.0 V–5.5 V supply, maintains CMRR ≥90 dB (up to ±6.144 V FSR), and achieves INL ≤±1 LSB at 8 SPS - all verified over full automotive temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit, no missing codes - ensures monotonicity and full-scale linearity for precision sensor digitization. |
| Max Sample Rate | 860 SPS - supports real-time monitoring of fast-changing vehicle signals like throttle position or brake pressure. |
| Input Configuration | 4 single-ended or 2 differential inputs - enables flexible signal routing for multi-sensor automotive subsystems. |
| PGA Gain Range | 1× to 16× (±0.256 V to ±6.144 V FSR) - allows direct connection of low-output sensors (e.g., thermocouples, strain gauges) without external op-amps. |
| Supply Current | 150 µA (continuous mode) - minimizes power draw in always-on automotive modules such as cluster displays. |
| Operating Temp | –40°C to +125°C (Grade 1) - certified for under-hood and instrument panel environments per AEC-Q100. |
| I²C Addresses | 4 pin-selectable addresses (via ADDR) - simplifies multi-device bus topology in distributed ECUs without address conflicts. |
Pinout & Package
ADS1115QDGSRQ1 is available in two qualified automotive packages: DGS (10-pin VSSOP, 3.0 mm × 3.0 mm) and NKS (10-pin UQFN, 1.6 mm × 2.0 mm). Both packages support identical pin functions and thermal performance (RθJA = 170.9°C/W for DGS, 126.3°C/W for NKS).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ADDR | I²C address select | Determines one of four slave addresses (0x48–0x4B); pulled high/low or left floating for default address. |
| ALERT/RDY | Digital output (open-drain) | Signals conversion completion or comparator threshold breach; requires external pull-up for I²C bus compatibility. |
| GND | Analog ground | Reference return for analog inputs and internal reference; must be separated from digital ground in mixed-signal layouts. |
| AIN0–AIN3 | Analog input terminals | Support multiplexed single-ended (AIN0–AIN3) or differential (AIN0–AIN1, AIN2–AIN3) acquisition; input impedance ≥100 kΩ at lowest FSR. |
| VDD | Power supply | 2.0 V–5.5 V analog/digital supply; requires 0.1 µF decoupling capacitor placed within 2 mm of pin. |
| SCL | I²C clock input | Accepts up to 3.4 MHz (high-speed mode); requires external pull-up resistor per I²C bus specifications. |
| SDA | I²C bidirectional data | Open-drain I/O supporting standard/fast/high-speed I²C protocols; shares pull-up with SCL on same bus segment. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PGA | Eight selectable gains (1–16) enable direct digitization of mV-range sensor outputs without external signal conditioning. |
| Programmable Comparator | Configurable high/low thresholds with latching or transparent modes - eliminates need for host MCU polling in battery monitoring or overvoltage detection. |
| Internal Voltage Reference | Low-drift reference (typ. 5 ppm/°C) ensures stable full-scale accuracy across –40°C to +125°C without external components. |
| Single-Cycle Settling | Guarantees valid conversion result after one data rate period - simplifies timing control in deterministic real-time systems. |
| AEC-Q100 Grade 1 Qualification | Validated for automotive ambient operation (–40°C to +125°C) with HBM ±2000 V and CDM ±750 V ESD robustness. |
Applications
| Automotive Cluster Display | Camera Module Sensor Interface |
|---|---|
|
Use Scenario: Digitizing analog voltage outputs from backlight dimming circuits, temperature sensors, and button voltage dividers in digital instrument clusters. IC Role / Device Role / Timing Role: ADC front-end with integrated PGA and comparator - performs autonomous overtemperature alerting and adaptive brightness scaling. Use Value: Reduces BOM count by eliminating discrete op-amps and comparators while maintaining 16-bit resolution across full automotive temperature range. |
Use Scenario: Converting analog pixel sensor bias voltages and lens actuator feedback signals in automotive surround-view cameras. IC Role / Device Role / Timing Role: Precision analog monitor with single-cycle settling - captures transient lens position changes at up to 860 SPS without host intervention. Use Value: Enables closed-loop focus/zoom control using only I²C commands and ALERT interrupt, reducing MCU processing load. |
| Center Information Display | General-Purpose Voltage Monitoring |
|
Use Scenario: Measuring battery voltage, HVAC motor current (via shunt), and ambient light sensor output in infotainment head units. IC Role / Device Role / Timing Role: Multi-channel sensor hub with 4 single-ended inputs - concurrently samples three independent analog sources with configurable data rates. Use Value: Supports simultaneous monitoring of critical power rails and environmental parameters using a single 10-pin IC and minimal PCB area. |
Use Scenario: Detecting undervoltage/overvoltage conditions in 12 V automotive subsystems (e.g., ADAS domain controllers, telematics gateways). IC Role / Device Role / Timing Role: Programmable threshold detector with latched ALERT output - triggers system reset or warning flag without continuous polling. Use Value: Provides fail-safe voltage supervision with <1 µs response latency after threshold breach, meeting ASIL-B functional safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit automotive ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1114QDGSRQ1 | Single-input (1 SE / 1 DE), identical PGA, comparator, and specs - lacks AIN2/AIN3 channels and MUX. | Suitable only for single-sensor monitoring; cannot replace ADS1115QDGSRQ1 in multi-channel designs without layout change. | Select when cost optimization is prioritized and only one analog source requires digitization with comparator alerting. |
| ADS1118QDGSRQ1 | Same 16-bit resolution and 860 SPS, but uses SPI interface and integrates onboard temperature sensor - no I²C or ALERT/RDY pin. | Requires SPI-capable MCU and different firmware stack; temperature sensing adds value in thermal management but removes I²C simplicity. | Choose for systems needing on-die temperature measurement alongside voltage monitoring and where SPI infrastructure already exists. |
Compared with ADS1114QDGSRQ1 and ADS1118QDGSRQ1, the ADS1115QDGSRQ1 uniquely combines quad analog inputs, I²C compatibility, and comparator-driven interrupt signaling - making it optimal for compact, multi-sensor automotive displays requiring minimal MCU overhead and board space.
Availability
ADS1115QDGSRQ1 is available at Aetrix Electronics and suitable for automotive cluster displays, center information displays, and camera module sensor interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADS1115QDGSRQ1 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 automotive qualification expertise and functional safety documentation support.
The ADS111x-Q1 product line was designed specifically for AEC-Q100-compliant sensor signal acquisition in automotive infotainment, body electronics, and ADAS subsystems - emphasizing low power, small footprint, and integrated signal conditioning.
FAQ
What is the maximum sampling rate supported by the ADS1115QDGSRQ1?
The ADS1115QDGSRQ1 supports a maximum sampling rate of 860 samples per second (SPS) in continuous-conversion mode. This rate is achievable across all programmable gain settings and full-scale input ranges. At lower data rates (e.g., 8 SPS), the device delivers improved noise performance and higher effective resolution - up to 16 bits noise-free at 8 SPS with ±0.256 V FSR. The ADS1115QDGSRQ1 maintains single-cycle settling across all rates, ensuring deterministic timing for real-time automotive applications.
Does the ADS1115QDGSRQ1 require external components for basic operation?
No, the ADS1115QDGSRQ1 operates autonomously with only a 0.1 µF VDD decoupling capacitor and external pull-up resistors on SDA/SCL/ALERT/RDY lines. It integrates a precision voltage reference, oscillator, PGA, and digital comparator - eliminating the need for external op-amps, references, clocks, or discrete comparators. The ADDR pin allows I²C address selection without additional logic, and the internal MUX supports 4 single-ended inputs without external switching circuitry. This integration reduces total solution size and improves reliability in automotive environments.
How does the programmable gain amplifier (PGA) in the ADS1115QDGSRQ1 improve measurement accuracy?
The PGA in the ADS1115QDGSRQ1 provides eight selectable gain settings (1× to 16×), enabling direct digitization of low-amplitude sensor signals (e.g., thermocouples, bridge sensors) while maximizing ADC dynamic range usage. For example, with ±0.256 V FSR at 16× gain, the device resolves 7.81 µV per LSB - significantly enhancing small-signal SNR without external amplification. Gain selection is register-controlled and fully characterized over temperature, with gain drift as low as 5 ppm/°C at ±2.048 V FSR - ensuring stable accuracy across the full –40°C to +125°C automotive operating range.
Can the ADS1115QDGSRQ1 be used in functional safety–compliant systems?
Yes, the ADS1115QDGSRQ1 is functional safety-capable with documentation available to support ISO 26262 ASIL-B system design. It meets AEC-Q100 Grade 1 requirements (–40°C to +125°C), includes built-in diagnostics such as CRC error detection on I²C reads, and supports safe failure modes via configurable ALERT/RDY behavior. Its integrated comparator enables autonomous over/under-voltage detection without MCU involvement - reducing software complexity in safety-critical paths. Texas Instruments provides FIT rate data, FMEDA reports, and safety manuals specifically for the ADS1115QDGSRQ1 to aid safety analysis.
What package options are available for the ADS1115QDGSRQ1, and how do they differ thermally?
The ADS1115QDGSRQ1 is offered in two AEC-Q200-qualified packages: DGS (10-pin VSSOP, 3.0 mm × 3.0 mm) and NKS (10-pin UQFN, 1.6 mm × 2.0 mm). Thermally, the NKS package provides superior junction-to-ambient performance with RθJA = 126.3°C/W versus 170.9°C/W for DGS - enabling higher power density in compact automotive modules. Both packages share identical pinout, electrical specs, and qualification status, allowing drop-in replacement based on board space and thermal constraints without redesigning the analog signal path.
ADS1115QDGSRQ1 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:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 2V ~ 5.5V
- Voltage - Supply, Digital:
- 2V ~ 5.5V
- Features:
- PGA, Selectable Address
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 10-VSSOP
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
ADS1115QDGSRQ1 FAQ
1.How can I place an order for ADS1115QDGSRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1115QDGSRQ1 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 ADS1115QDGSRQ1 reliable?
The price and inventory of ADS1115QDGSRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1115QDGSRQ1 is usually 5 days.
3.What payment methods are accepted for ADS1115QDGSRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1115QDGSRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1115QDGSRQ1?
ADS1115QDGSRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1115QDGSRQ1 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 ADS1115QDGSRQ1?
For technical support, including ADS1115QDGSRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1115QDGSRQ1 requirements.
6.How does Aetrix verify that ADS1115QDGSRQ1 is sourced from the original manufacturer or authorized distributors?
All ADS1115QDGSRQ1 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 ADS1115QDGSRQ1 meets industry standards.
7.What is the process for return or replacement of ADS1115QDGSRQ1?
All ADS1115QDGSRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ADS1115QDGSRQ1, 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 ADS1115QDGSRQ1 part is unused and in its original packaging.
Return procedure for ADS1115QDGSRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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