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Texas Instruments ADS7039QDCURQ1
- Part No.:
- ADS7039QDCURQ1
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-VFSOP (0.091", 2.30mm Width)
- Datasheet:
-
ADS7039QDCURQ1.pdf
- Description:
- IC ADC 10BIT SAR 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,796
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Product details
Overview
ADS7039QDCURQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified, 10-bit, 2-MSPS successive-approximation register (SAR) analog-to-digital converter with integrated offset calibration, SPI-compatible serial interface, and unipolar input range of 0 V to AVDD. It operates from –40°C to +125°C with 1.2 mW max power at 2 MSPS and 3-V AVDD, targeting space-constrained sensor signal acquisition in vehicle subsystems.
For engineers reviewing the ADS7039QDCURQ1 datasheet, ADS7039QDCURQ1 pinout, ADS7039QDCURQ1 application, or ADS7039QDCURQ1 equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, automotive-grade application mappings, and two confirmed alternative ADCs with documented functional and parametric differences.
Technical Context
The ADS7039QDCURQ1 implements a capacitor-based SAR architecture with inherent sample-and-hold, sampling on the CS falling edge and using SCLK for conversion timing and serial data output. Its reference voltage is directly tied to AVDD, eliminating external reference components while supporting 2.35 V to 3.6 V analog supply range.
Digital I/O operates independently from AVDD over 1.65 V to 3.6 V DVDD and complies with JESD8-7A for 1.65–1.95 V operation. Offset calibration is performed internally on power-up or during runtime, storing correction in a non-accessible register that automatically adjusts subsequent conversion results.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit straight-binary output; supports 1024 discrete codes across full-scale range. |
| Throughput Rate | 2 MSPS maximum; enables real-time sampling of fast-changing sensor signals such as ultrasonic flow or motor phase currents. |
| INL / DNL | ±0.4 LSB integral and differential nonlinearity; ensures monotonicity and <0.1% code-to-code error for precision control loops. |
| SNR / THD | 61 dB SNR and –75 dB THD at 2 kHz input and 3-V AVDD; suitable for medium-fidelity sensor digitization without external filtering. |
| Power Consumption | 1.2 mW max at 2 MSPS and 3-V AVDD; reduces thermal load and extends battery life in always-on automotive modules. |
| Supply Ranges | AVDD: 2.35–3.6 V; DVDD: 1.65–3.6 V; enables flexible power domain partitioning and direct interfacing with 1.8-V or 3.3-V microcontrollers. |
| Operating Temperature | –40°C to +125°C ambient; qualified per AEC-Q100 Grade 1 for under-hood and infotainment applications. |
Pinout & Package
ADS7039QDCURQ1 is housed in an 8-pin VSSOP package (2.30 mm × 2.00 mm), optimized for high-density automotive PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DVDD | Digital supply input | Provides independent power for digital I/O; decoupling required to maintain noise immunity during SCLK transitions. |
| SCLK | Digital input clock | Drives internal conversion timing and serial bit transfer; supports up to 28 MHz for 2-MSPS throughput. |
| SDO | Digital output data | 3-state SPI-compatible output delivering 12-bit frame (2 leading zeros + 10-bit result) on SCLK falling edges. |
| CS | Digital input chip select | Active-low frame initiator; falling edge triggers sampling, rising edge places SDO in high-impedance state. |
| AINP | Analog input positive | Primary single-ended analog input; accepts 0 V to AVDD range; referenced to AINM for pseudo-differential operation. |
| AINM | Analog input negative | Reference input for common-mode rejection; supports ±100 mV offset to accommodate ground potential differences in remote sensors. |
| AVDD | Analog supply & reference | Supplies analog circuitry and serves as ADC reference voltage; requires 3.3-µF low-ESR ceramic decoupling. |
| GND | Common ground reference | Single ground plane for all analog and digital signals; critical for minimizing noise coupling between AVDD and DVDD domains. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated offset calibration | Automatically corrects initial offset error to ±0.5 LSB after power-up or runtime trigger-no host software intervention required. |
| Zero-latency conversion | Delivers first valid sample immediately after acquisition time (120 ns); eliminates pipeline delay for closed-loop feedback timing. |
| Miniature VSSOP package | 2.30 mm × 2.00 mm footprint saves >60% board area vs. SOIC-8; compatible with standard pick-and-place and reflow processes. |
| JESD8-7A digital I/O compliance | Guarantees interoperability with 1.8-V logic families without level-shifting, reducing BOM count and signal integrity risk. |
| Wide AVDD/DVDD independence | Enables dual-rail system design-e.g., 3.3-V AVDD for sensor interface and 1.8-V DVDD for low-power MCU communication. |
Applications
| Automotive Infotainment | Ultrasonic Flow Meters |
|---|---|
Use Scenario: Digitizing audio line-level inputs or touch-sensor analog outputs in head unit control modules. IC Role / Device Role / Timing Role: Precision 10-bit ADC capturing DC-coupled sensor voltages or AC-coupled audio peaks with minimal latency. Use Value: 61-dB SNR and ±0.4 LSB INL ensure accurate amplitude representation for UI responsiveness and audio fidelity. |
Use Scenario: Converting time-of-flight voltage pulses from ultrasonic transducers in fuel or coolant flow sensing. IC Role / Device Role / Timing Role: High-speed SAR ADC acquiring transient pulse edges at 2 MSPS with deterministic 120-ns acquisition window. Use Value: Zero-latency architecture and 25-MHz full-power bandwidth enable precise edge detection without interpolation. |
| Level Sensors | Motor Control Feedback |
Use Scenario: Measuring resistive or capacitive tank-level signals in fuel, brake fluid, or washer fluid reservoirs. IC Role / Device Role / Timing Role: Low-power ADC sampling slow-varying DC signals with calibrated offset stability over temperature. Use Value: <1 µW power at 1 kSPS and ±10 ppm/°C offset drift reduce self-heating error and extend battery life in passive modules. |
Use Scenario: Sampling current-sense amplifier outputs for field-oriented control (FOC) in EPS or HVAC blower motors. IC Role / Device Role / Timing Role: Fast 2-MSPS ADC synchronizing with PWM periods to capture phase current zero-crossings. Use Value: 2-MSPS throughput and 120-ns acquisition time support >20-kHz control loop bandwidth with minimal phase lag. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7042QDCURQ1 | 12-bit resolution, same 2-MSPS rate, identical VSSOP-8 package and AEC-Q100 Grade 1 qualification. | Higher-resolution digitization for torque sensing or high-accuracy position feedback where 10-bit quantization noise is limiting. | Select when ENOB >9.5 bits is required; note increased power (1.5 mW) and slightly higher cost. |
| ADS7138IRTER | 8-channel, 12-bit, 1-MSPS SAR ADC with I²C interface; Q1 qualification not specified; 16-pin WQFN package. | Multi-sensor monitoring (e.g., cabin air quality, seat occupancy) where channel count outweighs speed or automotive certification. | Choose for systems needing >1 channel and I²C simplicity; avoid if AEC-Q100 Grade 1 or 2-MSPS single-channel performance is mandatory. |
Compared with ADS7039QDCURQ1, ADS7042QDCURQ1 offers higher resolution at matched speed and qualification, while ADS7138IRTER trades single-channel speed and automotive compliance for multi-channel integration and I²C convenience-neither is pin-compatible, requiring layout revision.
Availability
ADS7039QDCURQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ultrasonic flow metering, and motor control applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADS7039QDCURQ1 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 deep expertise in automotive-grade signal chain solutions.
The ADS7039QDCURQ1 belongs to TI's automotive-qualified precision SAR ADC product line, designed specifically for high-reliability, low-power, space-constrained sensor interface applications in vehicles.
FAQ
What is the reference voltage source for ADS7039QDCURQ1?
The ADS7039QDCURQ1 uses its AVDD supply pin as the internal reference voltage-no external reference is needed. The full-scale input range equals AVDD (0 V to AVDD), and AVDD must be decoupled with a 3.3-µF low-ESR ceramic capacitor to maintain stability during sampling. This architecture simplifies design and reduces BOM cost while maintaining 10-bit accuracy across the 2.35–3.6 V AVDD range.
Does ADS7039QDCURQ1 support true differential input?
No, ADS7039QDCURQ1 supports only pseudo-differential operation: AINP is the primary analog input (0 V to AVDD), and AINM serves as a dedicated reference input accepting ±100 mV to compensate for ground potential differences between remote sensors and the ADC. It does not perform true differential subtraction across both inputs-only the difference (AINP – AINM) is converted, with AINM constrained near 0 V.
How does offset calibration work in ADS7039QDCURQ1?
ADS7039QDCURQ1 performs automatic offset calibration on the first CS falling edge after power-up if CS remains low for ≥16 SCLK cycles. Calibration stores correction in an internal non-accessible register, and all subsequent conversions are adjusted in hardware. Recalibration can be triggered during operation by repeating the 16-SCLK CS low condition-no register writes or host commands are required.
What is the minimum acquisition time required before sampling with ADS7039QDCURQ1?
The ADS7039QDCURQ1 requires a minimum acquisition time (tACQ) of 120 ns after the end of conversion and before the next CS falling edge. This interval allows the internal sampling capacitor to fully settle to the input voltage. Failure to observe tACQ degrades INL and introduces code-dependent errors-designs must ensure sufficient inter-frame spacing or use continuous CS-driven sampling with proper timing margins.
Is ADS7039QDCURQ1 compatible with 1.8-V microcontrollers?
Yes, ADS7039QDCURQ1 supports DVDD from 1.65 V to 3.6 V and complies with JESD8-7A for 1.65–1.95 V operation, making it fully compatible with 1.8-V logic families. Digital inputs (CS, SCLK) recognize VIH ≥0.65×DVDD and VIL ≤0.35×DVDD, while SDO outputs VOH ≥0.8×DVDD and VOL ≤0.2×DVDD-no level shifters are needed when interfacing with 1.8-V MCUs.
ADS7039QDCURQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-VFSOP (0.091", 2.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 2M
- Number of Inputs:
- 1
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- -
- Ratio - S/H:ADC:
- 0:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- -
- Voltage - Supply, Analog:
- 2.35V ~ 3.6V
- Voltage - Supply, Digital:
- 1.65V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 8-VSSOP
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
ADS7039QDCURQ1 FAQ
1.How can I place an order for ADS7039QDCURQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7039QDCURQ1 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 ADS7039QDCURQ1 reliable?
The price and inventory of ADS7039QDCURQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7039QDCURQ1 is usually 5 days.
3.What payment methods are accepted for ADS7039QDCURQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7039QDCURQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7039QDCURQ1?
ADS7039QDCURQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7039QDCURQ1 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 ADS7039QDCURQ1?
For technical support, including ADS7039QDCURQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7039QDCURQ1 requirements.
6.How does Aetrix verify that ADS7039QDCURQ1 is sourced from the original manufacturer or authorized distributors?
All ADS7039QDCURQ1 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 ADS7039QDCURQ1 meets industry standards.
7.What is the process for return or replacement of ADS7039QDCURQ1?
All ADS7039QDCURQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ADS7039QDCURQ1, 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 ADS7039QDCURQ1 part is unused and in its original packaging.
Return procedure for ADS7039QDCURQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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