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Texas Instruments ADS1018QDGSRQ1
- Part No.:
- ADS1018QDGSRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADS1018QDGSRQ1.pdf
- Description:
- IC ADC 12BIT SIGMA-DELTA 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,387
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Product details
Overview
ADS1018QDGSRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified, 12-bit delta-sigma analog-to-digital converter with integrated PGA, voltage reference, oscillator, and high-accuracy temperature sensor. It supports four single-ended or two differential inputs, operates from 2 V to 5.5 V, delivers up to 3300 SPS, and achieves 12-bit noise-free resolution for precision sensor signal acquisition in battery management and automotive thermal sensing.
For engineers reviewing the ADS1018QDGSRQ1 datasheet, ADS1018QDGSRQ1 pinout, ADS1018QDGSRQ1 application, or ADS1018QDGSRQ1 equivalent, key selection considerations include its SPI interface, ±0.256 V to ±6.144 V programmable full-scale range, on-chip cold-junction compensation capability, 2°C max temperature sensor error, and 150 μA continuous-mode supply current.
Technical Context
The ADS1018QDGSRQ1 implements a delta-sigma (ΔΣ) ADC core with a 250 kHz modulator frequency derived from an internal 1 MHz oscillator. Its input multiplexer enables flexible configuration of four single-ended or two differential channels, with internal switching connecting the negative input to GND in single-ended mode.
Conversion is supported in continuous or single-shot mode, with automatic power-down after conversion in the latter. The integrated PGA provides six gain settings (1–16), and the internal low-drift voltage reference eliminates external component requirements while contributing to total system gain error of ≤0.25% over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit noise-free resolution - guarantees no missing codes across full operating range for reliable sensor digitization |
| Data Rate | 128–3300 SPS - selectable rates enable trade-off between speed and noise performance in real-time monitoring |
| Supply Voltage | 2 V to 5.5 V - supports direct connection to common automotive rails including 3.3 V and 5 V systems |
| Temperature Sensor Accuracy | ±2°C over –40°C to +125°C - enables system-level thermal monitoring and cold-junction compensation without external sensors |
| PGA Full-Scale Range | ±0.256 V to ±6.144 V - accommodates both low-level thermocouple outputs and higher-voltage RTD bridge signals |
| Quiescent Current | 150 μA in continuous mode - minimizes power draw in always-on vehicle subsystems such as BMS |
| Interface | SPI-compatible serial interface - simplifies host MCU integration with standard peripheral drivers and deterministic timing |
Pinout & Package
VSSOP-10 package (3.00 mm × 3.00 mm), optimized for space-constrained automotive PCB layouts and compatible with standard surface-mount assembly processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCLK | Serial clock input | Master-controlled timing signal for synchronous SPI data transfer; low pulse >30.8 ms resets interface |
| CS | Chip select (active low) | Enables device communication on shared SPI bus; can be tied low if dedicated |
| GND | Power supply ground | Reference node for analog and digital sections; requires low-impedance connection to minimize noise coupling |
| AIN0–AIN3 | Analog input channels | Support four single-ended or two differential measurements; internally protected by ESD diodes to VDD/GND |
| VDD | Power supply | 2–5.5 V supply input; requires 0.1 µF decoupling capacitor placed near pin per layout guidelines |
| DOUT/DRDY | Data output / data ready indicator | Combines serial data output and active-low conversion-ready flag for efficient polling or interrupt-driven reads |
| DIN | Serial data input | Accepts configuration register writes and command sequences; sampled on SCLK falling edge |
Key Features
| Feature | Design Value |
|---|---|
| Integrated temperature sensor | Provides ±2°C accuracy over –40°C to +125°C for cold-junction compensation in K-type thermocouple systems without external components |
| Programmable gain amplifier (PGA) | Offers six gain settings (1–16) to match input signal amplitude to ADC full-scale range, maximizing SNR for microvolt-level sensor outputs |
| Internal voltage reference | Eliminates need for external reference IC or resistor divider, reducing BOM count and layout area while maintaining ≤0.25% gain error over temperature |
| Single-cycle settling | Ensures valid conversion result after each sampling event-critical for fast transient detection in safety-critical automotive applications |
| AEC-Q100 Grade 1 qualification | Validated for operation from –40°C to +125°C ambient, meeting reliability and stress-test requirements for engine bay and powertrain electronics |
Applications
| Battery Management Systems | Automotive Thermocouple Monitoring |
|---|---|
Use Scenario: Real-time cell voltage and pack temperature monitoring in 12 V and 48 V EV/HEV battery modules. IC Role / Device Role / Timing Role: ADC front-end digitizing voltage sense points and onboard temperature readings for SoC/SoH estimation algorithms. Use Value: Integrated temperature sensor enables simultaneous cold-junction compensation and system thermal profiling using a single device, reducing component count and calibration complexity. |
Use Scenario: Exhaust gas temperature measurement using K-type thermocouples in diesel particulate filter (DPF) control systems. IC Role / Device Role / Timing Role: Precision analog front-end converting thermocouple mV output into digital values with on-chip cold-junction compensation. Use Value: ±2°C max temperature sensor error ensures accurate DPF regeneration timing, directly supporting emissions compliance and thermal protection logic. |
| Resistance Temperature Detector Interfaces | Electrochemical Gas Sensors |
Use Scenario: High-accuracy coolant or cabin air temperature sensing using Pt100/Pt1000 RTD elements in HVAC and thermal management ECUs. IC Role / Device Role / Timing Role: Low-noise ADC with programmable gain scaling small bridge output voltages (e.g., 1–10 mV/°C) to full-scale range. Use Value: 12-bit noise-free resolution and ±0.256 V FSR setting deliver <0.1°C effective temperature resolution, meeting ASIL-B functional safety requirements. |
Use Scenario: Detection of CO, NOx, or O₂ concentrations in cabin air quality modules and exhaust aftertreatment systems. IC Role / Device Role / Timing Role: Signal conditioner digitizing low-amplitude, high-impedance current outputs from electrochemical cells. Use Value: 6 MΩ common-mode input impedance at ±2.048 V FSR prevents loading errors on microamp-level sensor currents, preserving measurement linearity and long-term stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1118QDGSRQ1 | 16-bit resolution, 860 SPS max, same VSSOP-10 package and SPI interface | Better DC accuracy for static temperature or strain gauge measurements; lower speed limits dynamic response | Select when higher resolution outweighs sample rate needs and system timing budget allows longer conversion cycles |
| ADS1015IDGSR | I²C interface, non-automotive grade, no integrated temperature sensor | Cost-sensitive industrial or consumer designs without AEC-Q100 or cold-junction compensation requirements | Choose only for non-automotive applications where I²C simplifies host interface and external temperature sensing is acceptable |
Compared with ADS1018QDGSRQ1, the ADS1118QDGSRQ1 trades speed for resolution in static-sensing roles, while the ADS1015IDGSR sacrifices automotive qualification, temperature sensing, and SPI compatibility-making ADS1018QDGSRQ1 uniquely balanced for cost-constrained, safety-aware automotive sensor nodes requiring both speed and embedded thermal intelligence.
Availability
ADS1018QDGSRQ1 is available at Aetrix Electronics and suitable for battery management systems, automotive thermocouple interfaces, and resistance temperature detector signal chains requiring stable component supply across extended temperature ranges and automotive lifecycle commitments.
Supply support for ADS1018QDGSRQ1 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 delivering analog and embedded processing solutions, with deep expertise in precision data converters and automotive electronics.
The ADS1018QDGSRQ1 belongs to TI's automotive-qualified precision ADC product line, designed specifically for sensor signal acquisition in harsh-environment vehicle subsystems-including powertrain, chassis, and electrification controls-where AEC-Q100 compliance and integrated signal conditioning are mandatory.
FAQ
What is the maximum operating temperature range for the ADS1018QDGSRQ1?
The ADS1018QDGSRQ1 is qualified to AEC-Q100 Grade 1 specifications and operates reliably from –40°C to +125°C ambient temperature. This rating covers full electrical performance including 12-bit noise-free resolution, ±2°C temperature sensor accuracy, and SPI timing compliance across the entire range-making it suitable for under-hood and powertrain applications where thermal stress is extreme.
Does the ADS1018QDGSRQ1 support differential input measurements?
Yes, the ADS1018QDGSRQ1 supports two differential input pairs: AIN0–AIN1 and AIN2–AIN3. The internal multiplexer allows software-selectable configuration via the Config register's MUX[2:0] bits. Differential mode rejects common-mode noise and improves immunity to EMI in automotive wiring harnesses-critical for accurate thermocouple or bridge sensor readings.
Can the ADS1018QDGSRQ1 use an external voltage reference?
No, the ADS1018QDGSRQ1 integrates a factory-trimmed low-drift voltage reference and does not support external reference inputs. All gain and offset specifications-including ≤0.25% gain error and ±0.5 LSB offset error-are specified with the internal reference active. This design reduces external component count and PCB area but fixes the reference as part of the device's calibrated signal chain.
How does the temperature sensor in the ADS1018QDGSRQ1 function for cold-junction compensation?
The ADS1018QDGSRQ1's integrated temperature sensor measures die temperature with ±2°C accuracy from –40°C to +125°C and outputs data in 12-bit two's complement format (0.125°C/LSB). When enabled via TS_MODE=1 in the Config register, it provides real-time cold-junction temperature for K-type thermocouple linearization-eliminating the need for a separate sensor and associated analog front-end circuitry in exhaust or transmission temperature modules.
What power-saving modes does the ADS1018QDGSRQ1 offer?
The ADS1018QDGSRQ1 supports two operational modes: continuous-conversion (150 μA typical supply current) and single-shot (auto power-down after conversion, dropping to 5 μA). In single-shot mode, the device remains idle until commanded, making it ideal for periodic sensor polling in low-duty-cycle applications like cabin air quality monitoring-extending battery life in always-on vehicle subsystems.
ADS1018QDGSRQ1 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:
- 12
- Sampling Rate (Per Second):
- 3.3k
- Number of Inputs:
- 2, 4
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- 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, Temperature Sensor
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 10-VSSOP
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
ADS1018QDGSRQ1 FAQ
1.How can I place an order for ADS1018QDGSRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1018QDGSRQ1 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 ADS1018QDGSRQ1 reliable?
The price and inventory of ADS1018QDGSRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1018QDGSRQ1 is usually 5 days.
3.What payment methods are accepted for ADS1018QDGSRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1018QDGSRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1018QDGSRQ1?
ADS1018QDGSRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1018QDGSRQ1 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 ADS1018QDGSRQ1?
For technical support, including ADS1018QDGSRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1018QDGSRQ1 requirements.
6.How does Aetrix verify that ADS1018QDGSRQ1 is sourced from the original manufacturer or authorized distributors?
All ADS1018QDGSRQ1 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 ADS1018QDGSRQ1 meets industry standards.
7.What is the process for return or replacement of ADS1018QDGSRQ1?
All ADS1018QDGSRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ADS1018QDGSRQ1, 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 ADS1018QDGSRQ1 part is unused and in its original packaging.
Return procedure for ADS1018QDGSRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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