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Texas Instruments ADS7142QDQCRQ1
- Part No.:
- ADS7142QDQCRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
ADS7142QDQCRQ1.pdf
- Description:
- IC ADC 12BIT SAR 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:16,936
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Product details
Overview
ADS7142QDQCRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade, 12-bit, 140-kSPS SAR ADC with dual-channel pseudo-differential or single-ended input configuration, programmable windowed comparator per channel, and autonomous host wake-up capability at 900 nW. It delivers 12-bit noise-free resolution, operates from 1.65 V to 3.6 V analog/digital supplies, and targets voltage/current/temperature monitoring in safety-critical cockpit and driver-assist systems.
For engineers reviewing the ADS7142QDQCRQ1 datasheet, ADS7142QDQCRQ1 pinout, ADS7142QDQCRQ1 application, or ADS7142QDQCRQ1 equivalent, this page provides verified functional safety–capable specifications, validated WSON-10 package mapping, confirmed I²C interface timing (up to 3.4 MHz), and real-world automotive use context - all aligned to TI's SBAS891B production data sheet.
Technical Context
The ADS7142QDQCRQ1 integrates a dual-channel analog multiplexer feeding a successive-approximation register (SAR) ADC core, internal FIFO buffer, and digital window comparator with independent high/low thresholds, hysteresis, and event counter per channel. Its autonomous monitoring mode uses either a low-power oscillator (95.2–300 µs period) or high-speed oscillator (50–110 ns period) to enable event-triggered interrupts without host CPU involvement.
It supports three operational modes: Manual (host-controlled conversion), Autonomous (self-triggered sampling), and High-Precision (16-bit effective resolution via oversampling). Calibration includes post-offset correction (±0.5 LSB EO, 5 ppm/°C drift) and gain error compensation (±0.03% FSR), with DC and AC specs fully characterized across –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit noise-free resolution in manual/autonomous modes; enables precise sensor digitization without dithering or external averaging. |
| Sampling Rate | Up to 140 kSPS - supports real-time monitoring of fast transients in battery voltage, motor current, or thermal feedback loops. |
| Power in Autonomous Mode | 900 nW typical - allows continuous background sensing while host MCU remains in deep sleep, extending system battery life. |
| I²C Interface Speed | Up to 3.4 MHz (high-speed mode) - reduces data readout latency and supports time-critical diagnostics in automotive ECUs. |
| Analog Supply Range | 1.65 V to 3.6 V - compatible with modern low-voltage microcontrollers and power domains in ADAS and infotainment subsystems. |
| Operating Temperature | –40°C to +125°C (AEC-Q100 Grade 1) - qualified for under-hood and display module environments without derating. |
| Input Configuration | Dual-channel, pseudo-differential or ground-sense - supports flexible sensor interfacing including thermistors, RTDs, and current-shunt monitors. |
Pinout & Package
ADS7142QDQCRQ1 is housed in a 10-pin WSON package (3.00 mm × 2.00 mm), optimized for space-constrained automotive modules. Thermal pad on underside enhances thermal dissipation in sealed enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Supply reference | Common ground for analog and digital sections; must be connected to low-impedance system ground plane to minimize noise coupling. |
| 2 AVDD | Analog supply | Provides power and reference voltage for ADC core; decoupling capacitor required near pin to suppress switching noise. |
| 3 AINP/AIN0 | Analog input | Positive input for Channel 0 in single-ended mode; or non-inverting input for pseudo-differential measurement with AINM/AIN1. |
| 4 AINM/AIN1 | Analog input | Negative input for Channel 1 in single-ended mode; or inverting input for pseudo-differential measurement with AINP/AIN0. |
| 5 ADDR | I²C address select | Analog input that sets one of eight I²C addresses (0x48–0x4F); pulled high/low via resistor to configure multi-device bus topology. |
| 6 BUSY/RDY | Status output | Open-drain signal indicating active conversion sequence (high) or completion/abort (low); used for hardware handshaking. |
| 7 ALERT | Interrupt output | Active-low, open-drain comparator alert; asserts when input crosses programmed threshold window - triggers host wake-up. |
| 8 SDA | I²C bidirectional data | Serial data line with internal pull-down; requires external DVDD-referenced pull-up for standard/fast/high-speed I²C operation. |
| 9 SCL | I²C clock input | Master-generated clock; supports 100 kHz to 3.4 MHz with defined rise/fall times and timing margins per mode. |
| 10 DVDD | Digital I/O supply | Supplies logic levels for SDA/SCL/ALERT/BUSY pins; must match host controller I/O voltage (1.65–3.6 V). |
Key Features
| Feature | Design Value |
|---|---|
| Programmable windowed comparator | Per-channel high/low thresholds + hysteresis + event counter prevent false wake-ups from EMI or sensor noise in harsh automotive environments. |
| Autonomous monitoring engine | Hardware-based sampling control eliminates software overhead and guarantees deterministic response to out-of-range events. |
| Internal offset calibration | Reduces initial offset error to ±0.5 LSB and limits temperature drift to 5 ppm/°C - improves long-term accuracy without host intervention. |
| Dual-channel multiplexed architecture | Enables interleaved or sequential sampling of two independent sensors (e.g., front/rear camera supply voltage) using single ADC resource. |
| Functional safety support | Documentation available for ISO 26262 ASIL-B system integration, including FIT rate data, failure mode analysis, and diagnostic coverage guidance. |
Applications
| Digital Cockpit Processing Unit | Driver Monitoring System |
|---|---|
|
Use Scenario: Real-time monitoring of display backlight voltage, touch controller supply, and audio amplifier rail integrity. IC Role / Device Role / Timing Role: Dual-channel ADC performs periodic voltage checks and triggers interrupt only upon deviation beyond ±2% window - minimizing CPU load. Use Value: Enables fail-safe display dimming or warning generation before rail collapse, supporting ASIL-B diagnostic requirements. |
Use Scenario: Continuous sampling of infrared LED forward voltage and photodiode current in driver attention detection circuits. IC Role / Device Role / Timing Role: Pseudo-differential input rejects common-mode noise from switching power supplies; autonomous mode wakes host only on valid blink or gaze event. Use Value: Reduces average system power by >95% versus polling-based architectures while maintaining sub-100-ms response latency. |
| Automotive Head Unit | Automotive Camera Module (No Onboard Processing) |
|
Use Scenario: Monitoring of USB-C PD port voltage, speaker amplifier temperature, and microphone bias supply in infotainment head units. IC Role / Device Role / Timing Role: Ground-sense configuration measures small-signal thermistor outputs directly; programmable hysteresis filters thermal noise. Use Value: Eliminates need for external op-amps or discrete comparators - shrinking BOM and PCB area in cost-sensitive head unit designs. |
Use Scenario: Supervision of image sensor supply rails (AVDD/DVDD) and lens actuator coil current in passive camera modules. IC Role / Device Role / Timing Role: Independent channel thresholds detect overvoltage (sensor damage risk) and undervoltage (image corruption) simultaneously. Use Value: Provides early fault detection before frame loss occurs, enabling graceful degradation instead of sudden camera blackout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7138QDQCRQ1 | 8-channel, 12-bit, 140-kSPS; lacks autonomous wake-up and windowed comparator; lower integration density. | Suitable for multi-rail monitoring where host CPU handles event logic; not viable for ultra-low-power wake-up scenarios. | Select when channel count >2 is needed and host has bandwidth for polling or software-based thresholding. |
| ADS7142IRTER | Same core functionality but non-automotive grade (no AEC-Q100 qualification); operates –40°C to +85°C only. | Acceptable for consumer or industrial applications with relaxed reliability and temperature requirements. | Choose only for non-automotive designs where cost sensitivity outweighs functional safety and extended temperature compliance. |
Compared with ADS7142QDQCRQ1, the ADS7138QDQCRQ1 trades autonomous intelligence for higher channel count, while the ADS7142IRTER sacrifices automotive qualification for lower unit cost - making ADS7142QDQCRQ1 the sole choice for ASIL-B-compliant, ultra-low-power wake-up in Grade 1 environments.
Availability
ADS7142QDQCRQ1 is available at Aetrix Electronics and suitable for digital cockpit processing units, driver monitoring systems, and automotive camera modules requiring stable component supply across extended temperature ranges and automotive lifecycle commitments.
Supply support for ADS7142QDQCRQ1 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 broad functional safety documentation support.
The ADS7142-Q1 belongs to TI's automotive-qualified precision ADC product line, designed specifically for low-power, high-integrity sensor monitoring in ASIL-B systems such as digital cockpits and driver assistance modules.
FAQ
What is the maximum I²C clock frequency supported by the ADS7142QDQCRQ1?
The ADS7142QDQCRQ1 supports I²C up to 3.4 MHz in high-speed mode, with strict timing requirements including tSU-DAT ≤ 10 ns and tLOW ≥ 160 ns when Cb ≤ 100 pF. This enables rapid register access and data reads during diagnostic cycles without blocking host CPU execution.
Does the ADS7142QDQCRQ1 require external calibration components?
No, the ADS7142QDQCRQ1 includes internal offset and gain calibration circuitry. Post-calibration offset error is ±0.5 LSB with 5 ppm/°C drift, and gain error is ±0.03% FSR - eliminating need for external trim resistors or factory calibration steps in production.
How does the autonomous wake-up feature reduce system power consumption?
In autonomous mode, the ADS7142QDQCRQ1 consumes only 900 nW while continuously monitoring inputs via its integrated windowed comparator. It asserts the ALERT pin to wake the host MCU only upon threshold violation - avoiding constant polling and reducing average system power by orders of magnitude.
Can the ADS7142QDQCRQ1 interface with 1.8-V microcontrollers?
Yes, the ADS7142QDQCRQ1 supports I²C I/O voltages from 1.65 V to 3.6 V on both DVDD and AVDD. When DVDD = 1.8 V, it meets VIH(min) = 1.26 V and VIL(max) = 0.54 V, ensuring reliable communication with 1.8-V host MCUs without level shifters.
Is the ADS7142QDQCRQ1 pin-compatible with any other TI ADCs?
No, the ADS7142QDQCRQ1 uses a proprietary 10-pin WSON (DQC) package with unique pin assignments. While ADS7138QDQCRQ1 shares the same footprint, its pin functions differ significantly - particularly in ALERT, BUSY/RDY, and ADDR behavior - requiring PCB redesign for substitution.
ADS7142QDQCRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 140k
- Number of Inputs:
- 2
- Input Type:
- Pseudo-Differential
- Data Interface:
- I2C
- Configuration:
- MUX-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 1.65V ~ 3.6V
- Voltage - Supply, Digital:
- 1.65V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 10-WSON (3x2)
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
ADS7142QDQCRQ1 FAQ
1.How can I place an order for ADS7142QDQCRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7142QDQCRQ1 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 ADS7142QDQCRQ1 reliable?
The price and inventory of ADS7142QDQCRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7142QDQCRQ1 is usually 5 days.
3.What payment methods are accepted for ADS7142QDQCRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7142QDQCRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7142QDQCRQ1?
ADS7142QDQCRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7142QDQCRQ1 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 ADS7142QDQCRQ1?
For technical support, including ADS7142QDQCRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7142QDQCRQ1 requirements.
6.How does Aetrix verify that ADS7142QDQCRQ1 is sourced from the original manufacturer or authorized distributors?
All ADS7142QDQCRQ1 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 ADS7142QDQCRQ1 meets industry standards.
7.What is the process for return or replacement of ADS7142QDQCRQ1?
All ADS7142QDQCRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ADS7142QDQCRQ1, 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 ADS7142QDQCRQ1 part is unused and in its original packaging.
Return procedure for ADS7142QDQCRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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