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Texas Instruments ADS7042IDCUT
- Part No.:
- ADS7042IDCUT
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-VFSOP (0.091", 2.30mm Width)
- Datasheet:
-
ADS7042IDCUT.pdf
- Description:
- IC ADC 12BIT SAR 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:432
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Product details
Overview
ADS7042IDCUT from Texas Instruments is an ultra-low-power, 12-bit, 1-MSPS successive-approximation register (SAR) analog-to-digital converter in an X2QFN-8 package (1.5 mm × 1.5 mm). It features unipolar input range (0 V to AVDD), integrated offset calibration, and SPI-compatible serial interface operating up to 16 MHz. Designed for space-constrained, battery-powered systems, it delivers 70-dB SNR and ±1-LSB INL at 3-V AVDD.
For engineers reviewing the ADS7042IDCUT datasheet, ADS7042IDCUT pinout, ADS7042IDCUT application, or ADS7042IDCUT equivalent, this page provides verified technical context, real-world use cases, validated alternatives, and supply support for low-power data acquisition, wearable fitness, portable medical equipment, and ultrasonic flow meter designs.
Technical Context
The ADS7042IDCUT 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 analog input accepts single-ended signals referenced to AVDD, with AINP supporting 0 V to AVDD and AINM tolerating –100 mV to +100 mV for ground-offset rejection.
Digital operation is decoupled from analog: DVDD (1.65 V–3.6 V) powers the SPI interface independently of AVDD, and the device complies with JESD8-7A for DVDD = 1.65 V–1.95 V. Offset calibration is user-initiated and reduces uncalibrated offset error from ±12 LSB to ±0.5 LSB at 3-V AVDD.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes - guarantees monotonicity and full code coverage across temperature (–40°C to 125°C). |
| Throughput Rate | 1 MSPS maximum - achieved with 16-MHz SCLK; zero data latency enables real-time control loop sampling. |
| Power Consumption | 234 µW at 1 MSPS/1.8 V AVDD - enables >1-year battery life in 100-µA average-current wearable systems. |
| Analog Input Range | 0 V to AVDD (unipolar) - eliminates external level-shifting when interfacing with rail-to-rail op-amps or sensors. |
| INL / DNL | ±1 LSB max INL, ±0.99 LSB max DNL - ensures <0.025% linearity error for precision sensor measurement. |
| SNR / THD | 70 dB SNR, –80 dB THD at 3-V AVDD - supports accurate 10+ ENOB measurement of low-frequency biosignals. |
| Supply Voltage Ranges | AVDD: 1.65–3.6 V; DVDD: 1.65–3.6 V - allows independent low-noise analog rail and flexible digital I/O voltage selection. |
Pinout & Package
X2QFN-8 package (RUG), 1.5 mm × 1.5 mm × 0.35 mm height, wettable flank terminals, thermal pad exposed on bottom.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AINP | Analog input, positive | Main signal input; accepts 0 V to AVDD; sampled on CS falling edge; high-impedance during conversion. |
| AINM | Analog input, negative | Reference input for differential sensing; accepts –0.1 V to +0.1 V - rejects ground potential differences in remote sensor layouts. |
| AVDD | Analog power & reference | Supplies analog core and sets ADC full-scale range (FSR = AVDD); requires ≥200 nF ceramic decoupling. |
| DVDD | Digital I/O supply | Powers SPI interface independently; supports 1.65–3.6 V; JESD8-7A compliant at 1.65–1.95 V. |
| GND | Common ground | Single reference for all analog/digital signals; must be low-impedance connection to minimize noise coupling. |
| CS | Chip select | Active-low control; falling edge triggers sampling; rising edge places SDO in high-impedance state after conversion. |
| SCLK | Serial clock | Up to 16 MHz; controls conversion timing and serial data shift-out; duty cycle 45–55% required. |
| SDO | Serial data out | CMOS output; MSB-first, 12-bit straight binary; valid 30 ns after SCLK falling edge (AVDD ≥1.8 V). |
Key Features
| Feature | Design Value |
|---|---|
| Nanowatt standby power | <1 µW at 1 kSPS/3 V - extends battery life in intermittent-sampling applications like glucose meters. |
| Integrated offset calibration | Reduces offset error from ±12 LSB to ±0.5 LSB - eliminates need for external calibration circuitry or firmware compensation. |
| Zero-latency conversion | No pipeline delay - output corresponds to sampled input without cycle lag - critical for closed-loop motor control feedback. |
| Ultra-small footprint | 2.25 mm² X2QFN-8 - smaller than 0805 (2.0 mm × 1.25 mm) - enables integration into compact wearables and hearing aids. |
| Wide temperature range | Specified from –40°C to 125°C - supports under-hood automotive sensors and industrial motor drives without derating. |
Applications
| Wearable Fitness Tracker | Portable Glucose Meter |
|---|---|
|
Use Scenario: Continuous monitoring of photoplethysmography (PPG) signals from wrist-worn optical sensors. IC Role / Device Role / Timing Role: Single-ended ADC digitizing amplified, filtered PPG waveform at 1 MSPS with minimal power draw. Use Value: 70-dB SNR and 12-bit resolution capture subtle AC pulse components; 234 µW consumption enables multi-day battery operation. |
Use Scenario: Digitizing electrochemical current from test-strip biosensors in handheld diabetes management devices. IC Role / Device Role / Timing Role: Precision ADC converting low-level analog current (nA–µA) to digital for glucose concentration calculation. Use Value: ±1 LSB INL ensures <0.025% measurement linearity; integrated offset calibration removes baseline drift without user intervention. |
| Ultrasonic Flow Meter | Motor Control Current Sensing |
|
Use Scenario: Sampling echo return signals from ultrasonic transducers in battery-powered water/gas meters. IC Role / Device Role / Timing Role: High-speed ADC capturing transient analog pulses with precise timing alignment to transmit bursts. Use Value: 1-MSPS throughput captures full echo envelope; 25-MHz full-power bandwidth preserves fast rise-time integrity. |
Use Scenario: Real-time phase current sampling in BLDC motor inverters for field-oriented control (FOC). IC Role / Device Role / Timing Role: Low-latency ADC feeding current feedback to microcontroller PWM timers with deterministic timing. Use Value: Zero data latency ensures immediate response to overcurrent events; 1.5 mm × 1.5 mm size fits tight PCB layouts near power stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7041IDCUT | 10-bit resolution, same X2QFN-8 package, identical power profile (234 µW @ 1 MSPS/1.8 V). | Limited to applications requiring ≤10-bit precision (e.g., basic temperature sensing, simple threshold detection). | Select when resolution can be relaxed to reduce cost or simplify firmware processing; retains identical layout and supply design. |
| ADS7043IRUGR | Pseudo-differential input (AINP/AINM), same 12-bit/1-MSPS performance, same X2QFN-8 package. | Better common-mode noise rejection for noisy industrial environments; requires matched input traces. | Choose for applications with significant EMI or ground bounce where differential signaling improves robustness over single-ended AINP-only use. |
Compared with ADS7042IDCUT, ADS7041IDCUT trades 2 bits of resolution for lower cost and unchanged ultra-low power, while ADS7043IRUGR adds pseudo-differential capability without increasing size or power-making both viable alternatives depending on precision and noise immunity requirements.
Availability
ADS7042IDCUT is available at Aetrix Electronics and suitable for wearable fitness trackers, portable glucose meters, ultrasonic flow meters, and motor control current sensing requiring stable component supply across extended production lifecycles.
Supply support for ADS7042IDCUT 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 design.
The ADS7042IDCUT belongs to TI's ultra-low-power SAR ADC product line, engineered specifically for battery-operated, space-constrained applications demanding high resolution without compromising energy efficiency or thermal footprint.
FAQ
What is the minimum AVDD voltage required for reliable operation of the ADS7042IDCUT?
The ADS7042IDCUT operates reliably down to 1.65 V AVDD across its full temperature range (–40°C to 125°C). At this voltage, it maintains 12-bit resolution, ±1 LSB INL, and 1-MSPS throughput with typical power consumption of 130 µA analog supply current. Operation below 1.65 V is not characterized and may result in degraded linearity or timing violations.
Does the ADS7042IDCUT require an external reference voltage?
No, the ADS7042IDCUT uses AVDD as its internal reference voltage - the full-scale input range is exactly 0 V to AVDD. No external reference is needed, simplifying BOM and layout. A 1-µF low-ESR ceramic capacitor is required on AVDD to stabilize the switched-capacitor load during conversion.
Can the ADS7042IDCUT interface directly with a 1.8-V microcontroller SPI port?
Yes - the ADS7042IDCUT's DVDD pin accepts 1.65 V to 3.6 V, and its digital I/Os comply with JESD8-7A for DVDD = 1.65 V to 1.95 V. When DVDD = 1.8 V, VIH is 1.17 V min and VOL is 0.36 V max, ensuring robust logic-level compatibility with standard 1.8-V MCU SPI peripherals without level shifters.
How does the integrated offset calibration work in the ADS7042IDCUT?
The ADS7042IDCUT performs offset calibration by internally shorting AINP and AINM to AVDD/2, measuring the resulting code error, and storing correction values in on-chip registers. Calibration can be triggered once at power-up or repeatedly during operation via host SPI command. Calibrated offset error is reduced from ±12 LSB to ±0.5 LSB at 3-V AVDD.
Is the ADS7042IDCUT pin-compatible with other devices in the ADS704x family?
Yes - the ADS7042IDCUT shares the identical X2QFN-8 (RUG) package and pinout with ADS7040IDCUT, ADS7041IDCUT, ADS7043IRUGR, and ADS7044IRUGR. This enables drop-in replacement within the same footprint when adjusting resolution (8/10/12-bit) or input configuration (single-ended/pseudo-differential/fully differential) without PCB redesign.
ADS7042IDCUT 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:
- 12
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Supply
- Voltage - Supply, Analog:
- 1.65V ~ 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:
- -
- Qualification:
- -
ADS7042IDCUT FAQ
1.How can I place an order for ADS7042IDCUT through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7042IDCUT 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 ADS7042IDCUT reliable?
The price and inventory of ADS7042IDCUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7042IDCUT is usually 5 days.
3.What payment methods are accepted for ADS7042IDCUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7042IDCUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7042IDCUT?
ADS7042IDCUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7042IDCUT 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 ADS7042IDCUT?
For technical support, including ADS7042IDCUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7042IDCUT requirements.
6.How does Aetrix verify that ADS7042IDCUT is sourced from the original manufacturer or authorized distributors?
All ADS7042IDCUT 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 ADS7042IDCUT meets industry standards.
7.What is the process for return or replacement of ADS7042IDCUT?
All ADS7042IDCUT units undergo pre-shipment inspection (PSI). If there is an issue with ADS7042IDCUT, 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 ADS7042IDCUT part is unused and in its original packaging.
Return procedure for ADS7042IDCUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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