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Texas Instruments ADS7043IDCUR
- Part No.:
- ADS7043IDCUR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-VFSOP (0.091", 2.30mm Width)
- Datasheet:
-
ADS7043IDCUR.pdf
- Description:
- IC ADC 12BIT SAR 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,397
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Product details
Overview
ADS7043IDCUR from Texas Instruments is an ultra-low-power, 12-bit, 1-MSPS successive-approximation register (SAR) analog-to-digital converter with pseudo-differential input, integrated offset calibration, and SPI-compatible serial interface. It operates from 1.65 V to 3.6 V AVDD, delivers 70 dB SNR at 3-V supply, and achieves 243 µW power consumption at 1 MSPS with 1.8-V AVDD. It targets space-constrained, battery-powered sensor front-ends requiring zero-latency conversion.
For engineers reviewing the ADS7043IDCUR datasheet, ADS7043IDCUR pinout, ADS7043IDCUR application, or ADS7043IDCUR equivalent, this page provides verified technical context, package mapping to X2QFN-8 (1.5 × 1.5 mm), confirmed timing parameters (tACQ = 200 ns, fSCLK up to 16 MHz), real-world dynamic performance (±1-LSB INL/DNL, –80 dB THD), and validated alternatives for low-power data acquisition systems.
Technical Context
The ADS7043IDCUR implements a capacitor-based SAR architecture with inherent sample-and-hold, where sampling occurs on the CS falling edge and conversion is clocked by SCLK. Its reference voltage is derived directly from AVDD, enabling unipolar pseudo-differential input range of ±AVDD/2 with no external reference required.
Digital I/O complies with JESD8-7A for DVDD = 1.65 V to 1.95 V and supports full 1.65–3.6 V DVDD operation. The device features integrated offset calibration initiated via host control, and its 14-bit serial output frame (two leading zeros + 12-bit result) ensures deterministic timing with zero data latency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes (NMC) - guarantees monotonicity and full code coverage across temperature. |
| Throughput Rate | 1 MSPS maximum - enables real-time sampling of signals up to 500 kHz Nyquist bandwidth. |
| Power Consumption | 243 µW at 1 MSPS / 1.8-V AVDD - supports multi-year battery life in wearable and portable medical devices. |
| INL / DNL | ±1 LSB max (INL & DNL) - ensures accurate amplitude fidelity for precision sensor measurements. |
| Dynamic Performance | 70 dB SNR and –80 dB THD at 3-V AVDD - suitable for high-fidelity signal capture in ultrasonic flow meters and motor controls. |
| Analog Input Range | ±AVDD/2 pseudo-differential - simplifies front-end design by eliminating need for level-shifting or external reference. |
| SCLK Frequency | Up to 16 MHz - allows use with low-cost microcontrollers without requiring high-speed peripherals. |
Pinout & Package
X2QFN-8 package (1.5 mm × 1.5 mm × 0.35 mm height) with wettable flank leads for automated optical inspection (AOI) and reliable solder joint formation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AINP | Analog input, positive | Primary analog signal input; sampled differentially against AINM with internal switched-capacitor SAR array. |
| AINM | Analog input, negative | Reference input for pseudo-differential mode; accepts AVDD/2 ± 100 mV, enabling ratiometric sensing. |
| AVDD | Analog supply & reference | Single-supply rail powering analog circuitry and defining full-scale range (FSR = AVDD); requires 1-µF ceramic decoupling. |
| DVDD | Digital I/O supply | Independent 1.65–3.6 V digital supply; JESD8-7A compliant at 1.65–1.95 V for low-voltage MCU interfacing. |
| GND | Common ground | Unified analog/digital reference plane; all signals referenced to this pin - critical for noise-sensitive ADC layout. |
| CS | Digital input, active-low | Frame synchronization signal; falling edge triggers sampling, rising edge places SDO in high-impedance state. |
| SCLK | Digital input, clock | Serial clock input controlling conversion timing and bit-shift output; supports 16 MHz max for 1-MSPS throughput. |
| SDO | Digital output, serial data | CMOS-compatible 14-bit frame output (00 + 12-bit result); data valid on SCLK falling edge with tD_CKDO ≤ 50 ns. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small footprint | X2QFN-8 package (2.25 mm²) - smaller than 0805 SMD component, enabling PCB area reduction in wearables and handhelds. |
| Nanowatt standby power | <1 µW at 1 kSPS with 3-V AVDD - extends battery life during idle/sleep cycles without sacrificing wake-up latency. |
| Zero data latency | Direct output of conversion result within same frame - eliminates pipeline delay for closed-loop control applications. |
| Integrated offset calibration | User-initiated calibration reduces uncalibrated offset error from ±12 LSB to ±4 LSB - improves DC accuracy without external components. |
| Wide AVDD/DVDD independence | AVDD (1.65–3.6 V) and DVDD (1.65–3.6 V) operate independently - enables flexible power domain partitioning in mixed-signal systems. |
Applications
| Wearable Fitness Sensors | Portable Medical Equipment |
|---|---|
Use Scenario: Continuous biopotential monitoring (ECG, EMG) in compact, battery-operated patches. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned analog sensor outputs with minimal power overhead and zero-latency response. Use Value: 243 µW at 1 MSPS enables >3-year coin-cell operation; ±1-LSB INL ensures clinical-grade amplitude accuracy. |
Use Scenario: Glucose meter blood analyte detection using amperometric transducers. IC Role / Device Role / Timing Role: High-precision, low-noise ADC capturing low-level current pulses with calibrated offset stability. Use Value: Integrated offset calibration maintains <±4 LSB error over –40°C to 125°C, reducing calibration frequency and BOM cost. |
| Ultrasonic Flow Meters | Motor Control Current Sensing |
Use Scenario: Time-of-flight measurement in compact industrial flow sensors with tight thermal constraints. IC Role / Device Role / Timing Role: High-SNR ADC acquiring echo return signals with 70 dB SNR and 25 MHz full-power bandwidth. Use Value: 70 dB SNR at 2 kHz input enables sub-millimeter resolution; 200 ns acquisition time supports fast pulse repetition rates. |
Use Scenario: Shunt-based phase current sampling in BLDC motor drives with space-limited PCB layouts. IC Role / Device Role / Timing Role: Isolated or non-isolated current sense ADC delivering synchronized samples for field-oriented control (FOC). Use Value: 1-MSPS throughput with zero latency ensures precise current vector reconstruction; pseudo-differential input rejects common-mode noise from switching nodes. |
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 |
|---|---|---|---|
| ADS7042IDCUR | Same X2QFN-8 package, but 500-kSPS max throughput and lower 120 µW power at 500 kSPS/1.8 V. | Better suited for ultra-low-power, lower-bandwidth applications like environmental sensors where 1 MSPS is unnecessary. | Select ADS7042IDCUR when system sampling rate ≤500 kSPS and lowest possible active power is prioritized over speed. |
| ADS8860IDRCT | 16-bit resolution, 1-MSPS, WSON-10 (3 × 3 mm), higher 1.5 mW power at 1 MSPS/3 V, no integrated offset calibration. | Targets higher-precision applications (e.g., industrial process control) where resolution outweighs size and power constraints. | Choose ADS8860IDRCT only when 16-bit ENOB is mandatory and PCB area/power budget allow larger package and higher dissipation. |
Compared with ADS7042IDCUR and ADS8860IDRCT, the ADS7043IDCUR uniquely balances 1-MSPS speed, 12-bit precision, X2QFN-8 miniaturization, and nanowatt operation - making it optimal for battery-powered, space-constrained systems needing both speed and efficiency.
Availability
ADS7043IDCUR is available at Aetrix Electronics and suitable for wearable fitness sensors, portable medical equipment, ultrasonic flow meters, and motor control current sensing requiring stable component supply across extended production lifecycles.
Supply support for ADS7043IDCUR 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 company specializing in analog and embedded processing technologies, with leadership in precision data converters and low-power signal chain solutions.
The ADS7043 belongs to TI's ultra-low-power SAR ADC product line, designed specifically for battery-operated, miniaturized sensing systems demanding high performance per microwatt and per square millimeter.
FAQ
What is the minimum AVDD supply voltage required for guaranteed operation of the ADS7043IDCUR?
The ADS7043IDCUR is specified for guaranteed operation down to 1.65 V AVDD across the full temperature range (–40°C to 125°C). Operation below this voltage may result in degraded INL/DNL, reduced SNR, or failure to meet 1-MSPS throughput. The datasheet absolute maximum rating allows down to –0.3 V, but functional operation begins at 1.65 V.
Does the ADS7043IDCUR require an external reference voltage?
No, the ADS7043IDCUR uses AVDD as its internal reference voltage - the full-scale range is defined as ±AVDD/2. No external reference is needed, simplifying BOM and layout. A 1-µF ceramic decoupling capacitor on AVDD is mandatory to maintain reference stability during sampling.
How does the ADS7043IDCUR achieve zero data latency, and what does that mean for system design?
The ADS7043IDCUR outputs conversion results within the same CS frame - the first two bits (00) appear on SDO at the CS falling edge, followed by 12 data bits on subsequent SCLK falling edges. This eliminates pipeline delay, enabling immediate use of results in time-critical loops such as motor FOC or real-time sensor fusion without added buffering or timing compensation.
Can the ADS7043IDCUR interface directly with a 1.8-V microcontroller GPIO?
Yes - the ADS7043IDCUR's DVDD pin accepts 1.65 V to 3.6 V, and its digital I/O fully complies with JESD8-7A for DVDD = 1.65 V to 1.95 V. When DVDD = 1.8 V, VIH = 1.17 V (0.65 × 1.8 V) and VIL = 0.63 V (0.35 × 1.8 V), ensuring robust logic-level compatibility with standard 1.8-V MCUs without level shifters.
What is the purpose of the integrated offset calibration in the ADS7043IDCUR, and how is it triggered?
The integrated offset calibration in the ADS7043IDCUR reduces uncalibrated offset error from ±12 LSB to ±4 LSB over temperature. It is triggered by toggling the CS pin under specific timing conditions (as defined in the Offset Calibration section of SBAS681D), allowing users to perform calibration at power-up or during runtime without external hardware or firmware complexity.
ADS7043IDCUR 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:
- Pseudo-Differential
- 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:
- -
ADS7043IDCUR FAQ
1.How can I place an order for ADS7043IDCUR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7043IDCUR 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 ADS7043IDCUR reliable?
The price and inventory of ADS7043IDCUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7043IDCUR is usually 5 days.
3.What payment methods are accepted for ADS7043IDCUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7043IDCUR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7043IDCUR?
ADS7043IDCUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7043IDCUR 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 ADS7043IDCUR?
For technical support, including ADS7043IDCUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7043IDCUR requirements.
6.How does Aetrix verify that ADS7043IDCUR is sourced from the original manufacturer or authorized distributors?
All ADS7043IDCUR 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 ADS7043IDCUR meets industry standards.
7.What is the process for return or replacement of ADS7043IDCUR?
All ADS7043IDCUR units undergo pre-shipment inspection (PSI). If there is an issue with ADS7043IDCUR, 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 ADS7043IDCUR part is unused and in its original packaging.
Return procedure for ADS7043IDCUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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