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Texas Instruments ADS7044IDCUT
- Part No.:
- ADS7044IDCUT
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-VFSOP (0.091", 2.30mm Width)
- Datasheet:
-
ADS7044IDCUT.pdf
- Description:
- IC ADC 12BIT SAR 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:200
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Product details
Overview
ADS7044IDCUT from Texas Instruments is an ultra-low-power, 12-bit, 1-MSPS successive-approximation register (SAR) analog-to-digital converter with differential inputs (AINP/AINM), AVDD-referenced operation, and SPI-compatible serial interface. It delivers ±1-LSB INL/DNL, 71-dB SNR at 3-V AVDD, and consumes only 261 µW at 1 MSPS with 1.8-V AVDD. Designed for space-constrained, battery-powered systems, it operates across –40°C to 125°C.
For engineers reviewing the ADS7044IDCUT datasheet, ADS7044IDCUT pinout, ADS7044IDCUT application, or ADS7044IDCUT equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative options, and supply support for industrial embedded and wearable medical designs.
Technical Context
The ADS7044IDCUT implements a capacitor-based SAR architecture with integrated sample-and-hold, where sampling occurs on the CS falling edge and conversion is clocked by SCLK up to 16 MHz. Its AVDD serves dual roles as analog supply and reference voltage, defining a unipolar differential input range from 0 V to AVDD on both AINP and AINM.
It features factory-calibrated offset correction and supports independent digital supply (DVDD = 1.65–3.6 V), compliant with JESD8-7A for DVDD ≤ 1.95 V. The device achieves zero data latency and full 1-MSPS throughput without pipeline delay, enabled by its dedicated 14-cycle serial frame (2 leading zeros + 12-bit result).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for high-fidelity signal digitization in precision sensing. |
| Throughput Rate | 1 MSPS - enables real-time sampling of fast transients (e.g., motor current, ultrasonic echo) without undersampling. |
| Power Consumption | 261 µW at 1 MSPS / 1.8-V AVDD - extends battery life in wearables and handhelds beyond 10 years in low-duty-cycle operation. |
| INL / DNL | ±1 LSB max - ensures monotonicity and <0.025% end-point linearity error for closed-loop control accuracy. |
| SNR / THD | 71 dB / –85 dB at 3-V AVDD - supports 11.5 effective bits (ENOB) for clean acquisition of low-amplitude physiological signals. |
| Analog Input Range | Differential, 0 V to AVDD - simplifies front-end design by eliminating external level-shifting or biasing circuitry. |
| Supply Voltage Range | AVDD: 1.65–3.6 V; DVDD: 1.65–3.6 V - allows direct interfacing with 1.8-V or 3.3-V microcontrollers without level translators. |
Pinout & Package
X2QFN-8 (RUG) package: 1.5 mm × 1.5 mm × 0.35 mm profile, thermally enhanced bottom-paddle construction, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AINP | Analog input (positive) | Differential input terminal; accepts 0 V to AVDD; paired with AINM for rail-to-rail input voltage measurement. |
| AINM | Analog input (negative) | Differential input terminal; referenced to AINP; defines common-mode point for noise rejection in noisy environments. |
| AVDD | Analog supply & reference | Single-supply source for analog core and internal reference; sets full-scale range = 2 × AVDD; requires ≥200 nF decoupling. |
| GND | Analog/digital ground | Common return for all analog and digital signals; must be low-impedance and star-connected to minimize coupling noise. |
| CS | Digital input (active-low) | Frame initiator: falling edge triggers sampling; rising edge places SDO in high-impedance state after 14-clock transfer. |
| SCLK | Digital input (clock) | Serial clock input up to 16 MHz; controls conversion timing and bit-shift rate; duty cycle 45–55% required. |
| SDO | Digital output (data) | 3-state SPI output: outputs two leading zeros followed by 12-bit twos-complement result on SCLK falling edges. |
| DVDD | Digital I/O supply | Independent power for digital interface; supports 1.65–3.6 V; enables mixed-voltage system integration with 1.8-V MCUs. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent power | Sub-1 µW standby at 1 kSPS with 3-V AVDD - enables always-on sensing in glucose meters and hearables. |
| Industry's smallest SAR ADC footprint | 2.25 mm² X2QFN-8 package - fits within 0805 (2012 metric) board area, critical for miniaturized PCBs. |
| Integrated offset calibration | User-triggerable on-demand or at power-up - eliminates external calibration circuitry and reduces BOM count. |
| Zero-latency 1-MSPS operation | No pipeline delay; output valid immediately after frame completion - essential for real-time motor control feedback loops. |
| JESD8-7A digital I/O compliance | Validated for 1.65–1.95 V DVDD - guarantees interoperability with legacy low-voltage ASICs and FPGAs. |
Applications
| Wearable Fitness Sensors | Portable Medical Equipment |
|---|---|
|
Use Scenario: Continuous heart-rate monitoring via photoplethysmography (PPG) with ambient light cancellation. IC Role / Device Role / Timing Role: Digitizes differential current outputs from optical sensor front-end at 1 MSPS to capture pulse waveform fidelity. Use Value: 71-dB SNR and ±1-LSB linearity preserve small AC pulsatile components (<100 µV) amid large DC offsets (>1 V), enabling accurate BPM calculation. |
Use Scenario: Battery-powered glucose meter measuring electrochemical current from test strip reaction. IC Role / Device Role / Timing Role: Converts low-current analog signal (nA–µA range) into digital code with calibrated offset stability over temperature. Use Value: Integrated offset calibration maintains <±4 LSB error from –40°C to 125°C, reducing need for per-unit firmware compensation and improving diagnostic reliability. |
| Ultrasonic Flow Meters | Motor Control Current Sensing |
|
Use Scenario: High-speed time-of-flight measurement using echo signals from piezoelectric transducers. IC Role / Device Role / Timing Role: Samples amplified echo envelope at 1 MSPS to resolve sub-microsecond transit time differences. Use Value: 25-MHz full-power bandwidth and 200-ns acquisition time ensure faithful capture of fast-rising echo edges, directly improving flow rate resolution. |
Use Scenario: Shunt-based phase current sampling in BLDC motor drives for field-oriented control (FOC). IC Role / Device Role / Timing Role: Digitizes differential voltage across precision shunt resistor synchronized to PWM switching edges. Use Value: Zero-latency 1-MSPS throughput enables precise current reconstruction at 20-kHz PWM frequencies, minimizing torque ripple and acoustic noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7042IDCUR | 12-bit, 500-kSPS, same X2QFN-8 package but lower throughput and 150-µW power at 500 kSPS. | Better suited for lower-bandwidth sensors (e.g., temperature, pressure) where 1-MSPS is unnecessary. | Select ADS7042IDCUR when system sampling requirements are ≤500 kSPS and further power reduction is prioritized. |
| ADS8860IDRCT | 16-bit, 1-MSPS, VSSOP-10 package, 3.3-V only AVDD/DVDD, higher 12.5-mW power, ±1.5-LSB INL. | Targets high-precision industrial DAQ requiring >12-bit resolution, not ultra-low-power portable use. | Choose ADS8860IDRCT only when ENOB >13 bits is mandatory and board space/power budget allow larger package and higher dissipation. |
Compared with ADS7044IDCUT, ADS7042IDCUR trades half the speed for ~40% lower active power, while ADS8860IDRCT doubles resolution at 50× higher power and no AVDD-as-reference flexibility-making ADS7044IDCUT uniquely balanced for miniaturized, battery-critical 12-bit systems.
Availability
ADS7044IDCUT 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 temperature ranges and long production lifecycles.
Supply support for ADS7044IDCUT 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, embedded processing, and connectivity technologies, with decades of precision data converter innovation.
The ADS7044 belongs to TI's ultra-low-power SAR ADC product line, engineered specifically for space- and energy-constrained applications including wearables, portable diagnostics, and IoT edge nodes.
FAQ
What is the minimum AVDD voltage required for reliable operation of the ADS7044IDCUT?
The ADS7044IDCUT specifies a minimum AVDD of 1.65 V across its full operating temperature range (–40°C to 125°C). Operation below this voltage risks violation of absolute maximum ratings and may cause non-monotonic behavior or conversion failure. At 1.65 V, the device maintains 12-bit resolution and ±2 LSB INL, though SNR degrades to ~70 dB. Always decouple AVDD with ≥200 nF ceramic capacitance.
Does the ADS7044IDCUT require an external reference voltage?
No, the ADS7044IDCUT does not require an external reference voltage. It uses AVDD as its internal reference, establishing a full-scale input range of 0 V to AVDD on both AINP and AINM. This eliminates external reference ICs and associated routing complexity. However, AVDD must be low-noise and well-decoupled (TI recommends ≥1 µF low-ESR ceramic) to maintain specified SNR and THD performance.
How does the ADS7044IDCUT achieve zero data latency, and why does it matter?
The ADS7044IDCUT achieves zero data latency because its conversion and data output occur within a single, contiguous serial frame initiated by CS falling edge - there is no pipeline register or FIFO delay. The 12-bit result appears on SDO within 14 SCLK cycles. This matters for real-time control loops (e.g., motor FOC or closed-loop PPG), where delayed samples introduce phase lag and instability; zero latency ensures immediate feedback alignment with system events.
Can the ADS7044IDCUT interface directly with a 1.8-V microcontroller SPI port?
Yes, the ADS7044IDCUT supports DVDD from 1.65 V to 3.6 V and complies with JESD8-7A for DVDD = 1.65–1.95 V. When DVDD = 1.8 V, its digital inputs (CS, SCLK) accept VIH ≥ 1.17 V and VIL ≤ 0.63 V, and its SDO output drives VOH ≥ 1.44 V and VOL ≤ 0.45 V - fully compatible with standard 1.8-V CMOS logic levels without level shifters.
What is the purpose of the two leading zeros in the ADS7044IDCUT serial output format?
The two leading zeros in the ADS7044IDCUT's 14-bit serial frame (0-0-D11-D10-…-D0) serve as framing markers that indicate the start of valid conversion data and provide timing margin for host controller synchronization. They allow the host MCU to reliably detect frame boundaries even under clock jitter or variable SCLK startup conditions, ensuring robust data capture without requiring additional handshaking signals.
ADS7044IDCUT 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:
- 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:
- -
ADS7044IDCUT FAQ
1.How can I place an order for ADS7044IDCUT through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7044IDCUT 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 ADS7044IDCUT reliable?
The price and inventory of ADS7044IDCUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7044IDCUT is usually 5 days.
3.What payment methods are accepted for ADS7044IDCUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7044IDCUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7044IDCUT?
ADS7044IDCUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7044IDCUT 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 ADS7044IDCUT?
For technical support, including ADS7044IDCUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7044IDCUT requirements.
6.How does Aetrix verify that ADS7044IDCUT is sourced from the original manufacturer or authorized distributors?
All ADS7044IDCUT 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 ADS7044IDCUT meets industry standards.
7.What is the process for return or replacement of ADS7044IDCUT?
All ADS7044IDCUT units undergo pre-shipment inspection (PSI). If there is an issue with ADS7044IDCUT, 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 ADS7044IDCUT part is unused and in its original packaging.
Return procedure for ADS7044IDCUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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