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Texas Instruments ADS1244IDGSTG4
- Part No.:
- ADS1244IDGSTG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADS1244IDGSTG4.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,252
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Product details
Overview
ADS1244IDGSTG4 from Texas Instruments is a 24-bit delta-sigma analog-to-digital converter (ADC) with ±5V differential input range, 15 sps data rate, single-cycle settling, and simultaneous 50Hz/60Hz rejection-designed for high-precision, low-power portable instrumentation such as handheld multimeters and battery-powered medical sensors.
For engineers reviewing the ADS1244IDGSTG4 datasheet, ADS1244IDGSTG4 pinout, ADS1244IDGSTG4 application, or ADS1244IDGSTG4 equivalent, this page delivers verified technical context, real-world timing behavior, supply-flexible operation (2.5–5.25V AVDD / 1.8–3.6V DVDD), Sleep Mode power control (<1 µW), and MSP430 microcontroller interface compatibility.
Technical Context
The ADS1244IDGSTG4 implements a 3rd-order delta-sigma modulator paired with a fixed digital filter that rejects 50Hz and 60Hz line noise in one conversion cycle and outputs fully settled 24-bit two's complement data at 15 samples per second. Its analog front-end uses switched-capacitor sampling with effective input impedances of ~13 MΩ (AINP/AINN) and ~6.5 MΩ (differential path) at 2.4576 MHz CLK.
Control is handled via a 2-wire serial interface: DRDY/DOUT signals data readiness (active-low) and shifts out MSB-first data on SCLK rising edges, while self-calibration and Sleep Mode entry are triggered by precise SCLK pulse sequences-not register writes. The device supports true single-conversion operation by entering Sleep Mode between measurements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit no-missing-codes output with 20-bit effective resolution (ENOB) under typical conditions |
| Data Rate | 15 sps at fCLK = 2.4576 MHz; scales linearly with clock frequency (e.g., 30 sps at 4.9152 MHz) |
| Differential Input Range | ±5 V full-scale (±2×VREF), supporting direct connection to industrial sensor bridges and strain gauges |
| INL Error | ±0.0002% FSR (typ), ±0.0008% FSR (max) - enables <1 ppm measurement accuracy in precision weigh scales |
| Power Consumption | 270 µW (normal operation, AVDD=3V/DVDD=3V); <1 µW in Sleep Mode with CLK stopped |
| Supply Voltage Ranges | AVDD: 2.5–5.25 V; DVDD: 1.8–3.6 V - allows independent analog/digital rail optimization and single-supply operation |
| Common-Mode Rejection | ≥100 dB at 50/60 Hz - eliminates interference from shared ground paths in multi-sensor systems |
Pinout & Package
ADS1244IDGSTG4 is housed in a thermally enhanced MSOP-10 package (3.0 mm × 3.0 mm, 0.5 mm pitch) with exposed thermal pad (DGS suffix). Pin functions are validated per TI SBAS273 datasheet Rev. D (2002) and confirmed on TI.com product page.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Analog & Digital Ground | Single reference node for both AVDD and DVDD domains; must be low-impedance and star-connected to minimize noise coupling |
| 2 VREFP | Positive Reference Input | High-impedance input for upper reference rail; requires 0.1 µF bypass to VREFN for optimal noise rejection |
| 3 VREFN | Negative Reference Input | Completes differential reference pair; ESD-protected; voltage must stay within GND–0.1 V to AVDD+0.1 V |
| 4 AINN | Negative Analog Input | Differential input terminal; accepts signals down to GND–0.1 V; effective impedance ≈13 MΩ at 2.4576 MHz CLK |
| 5 AINP | Positive Analog Input | Differential input terminal; full-scale range defined as AINP–AINN = ±2×(VREFP–VREFN) |
| 6 AVDD | Analog Power Supply | Supplies modulator and reference circuitry; 2.5–5.25 V range supports ±5 V input headroom |
| 7 DVDD | Digital Power Supply | Supplies digital filter and serial interface; 1.8–3.6 V range enables ultra-low-power MCU interfacing |
| 8 DRDY/DOUT | Multi-function Output | Active-low data-ready flag; transitions to serial data output (MSB first) on first SCLK rising edge after DRDY assertion |
| 9 SCLK | Serial Clock Input | Edge-triggered control signal; initiates data read, self-calibration (26th falling edge), and Sleep Mode entry (held HIGH) |
| 10 CLK | System Clock Input | Drives internal modulator and filter; 2.4576 MHz recommended for 50/60 Hz rejection and 15 sps output |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous 50Hz & 60Hz rejection | Digital filter notch placement fixed at line frequencies without external components-enables clean measurements in global AC-powered environments |
| Single-cycle settling | Full 24-bit accuracy achieved after one conversion; eliminates need for oversampling or discard cycles in dynamic sensor applications |
| Sleep Mode with <1 µW dissipation | Entire analog and digital circuitry powered down between conversions-critical for battery life in portable medical devices |
| Self-calibration without external references | On-chip offset/gain calibration executed via SCLK waveform; no external DACs or precision resistors required |
| MSP430 microcontroller interface support | Compatible with ultra-low-power MSP430 FLL-generated 2.4576 MHz clock and 1.8–3.6 V I/O levels-reduces BOM count and layout complexity |
Applications
| Hand-Held Instrumentation | Portable Medical Equipment |
|---|---|
Use Scenario: Battery-powered handheld multimeter measuring resistance, voltage, and temperature with auto-ranging and autoranging display. IC Role / Device Role / Timing Role: Primary ADC capturing slow-varying analog inputs; provides 24-bit resolution and line-frequency rejection for stable readings in lab or field. Use Value: Enables >100,000-count display resolution with <1 ppm INL error and zero external filtering-reducing bill-of-materials and PCB area. |
Use Scenario: Portable ECG monitor acquiring biopotential signals from dry electrodes with minimal patient wiring. IC Role / Device Role / Timing Role: High-common-mode-rejection ADC digitizing low-amplitude, high-impedance biosignals while rejecting 50/60 Hz mains interference. Use Value: Delivers ≥100 dB CMRR at 50/60 Hz and <1 µW Sleep Mode power-extending battery runtime beyond 72 hours per charge. |
| Industrial Process Control | Weigh Scales |
Use Scenario: Loop-powered 4–20 mA transmitter conditioning bridge sensor outputs (load cells, pressure transducers) in hazardous environments. IC Role / Device Role / Timing Role: Precision ratiometric ADC referenced to bridge excitation; handles ±5 V differential inputs with programmable gain staging. Use Value: Achieves ±0.0008% INL max and 0.01 ppm/°C offset drift-meeting SIL-2 functional safety requirements for weight-based control loops. |
Use Scenario: Platform scale using four quarter-bridge load cells with temperature compensation and tare functionality. IC Role / Device Role / Timing Role: Low-noise, low-drift ADC performing synchronized multi-channel sampling across distributed load cell nodes. Use Value: Supports multichannel synchronous sampling via shared CLK/SCLK; enables <10 mg repeatability in 10 kg full-scale designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-resolution, low-power delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1247IPW | 24-bit, 2 kSPS, SPI interface, integrated PGA (1–128×), 32-pin TSSOP; higher speed but larger footprint and no Sleep Mode | Better suited for multi-sensor industrial PLCs requiring programmable gain and faster update rates | Select ADS1247IPW when system needs on-chip amplification and >15 sps throughput; not drop-in due to pin count and interface change |
| AD7793BRUZ | 24-bit, 480 sps, SPI interface, integrated reference and PGA, 16-pin TSSOP; 50/60 Hz rejection via programmable filter, higher current draw (~400 µA) | Ideal for space-constrained medical monitors needing internal reference and lower external component count | Choose AD7793BRUZ if reference buffering and PGA integration outweigh power and size penalties; requires PCB redesign |
Compared with ADS1244IDGSTG4, ADS1247IPW offers higher speed and gain flexibility at the cost of Sleep Mode capability and MSOP-10 compactness, while AD7793BRUZ trades ultra-low power for integrated features-making ADS1244IDGSTG4 optimal for battery-limited, single-channel, line-noise-sensitive applications where minimal external components and sub-µW idle power are critical.
Availability
ADS1244IDGSTG4 is available at Aetrix Electronics and suitable for handheld instrumentation, portable medical equipment, and industrial process control requiring stable component supply, long-term lifecycle support, and traceable sourcing from authorized channels.
Supply support for ADS1244IDGSTG4 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 over 50 years of innovation in precision data converters and low-power signal chains.
The ADS1244IDGSTG4 belongs to TI's precision delta-sigma ADC portfolio designed specifically for high-resolution, low-power, portable measurement systems-emphasizing ease of microcontroller integration, minimal external components, and robust line-frequency immunity.
FAQ
What is the maximum clock frequency supported by ADS1244IDGSTG4?
The ADS1244IDGSTG4 supports CLK frequencies up to 6 MHz per absolute maximum ratings. At 4.9152 MHz, it achieves 30 sps output with 50/60 Hz rejection shifted to 100/120 Hz. Operation above 2.4576 MHz increases power consumption and reduces line-frequency rejection depth-designers should verify noise performance and filter response in final layout.
Does ADS1244IDGSTG4 require external calibration components?
No, ADS1244IDGSTG4 performs full self-calibration internally using on-chip circuitry. Power-up calibration occurs automatically when AVDD and DVDD settle monotonically; user-initiated calibration requires only two additional SCLK pulses after data read-no external DACs, references, or precision resistors are needed.
Can ADS1244IDGSTG4 operate from a single 3.3V supply?
Yes, ADS1244IDGSTG4 supports single-supply operation: connect AVDD and DVDD together at 3.3 V. This configuration maintains ±5 V differential input range (with VREF = 2.5 V) and draws <100 µA total current. Ensure DRDY/DOUT logic levels remain compatible with host MCU I/O thresholds.
How does ADS1244IDGSTG4 achieve simultaneous 50Hz and 60Hz rejection?
ADS1244IDGSTG4 achieves simultaneous 50Hz and 60Hz rejection through its fixed-coefficient digital filter architecture, which places deep notches exactly at both frequencies when CLK = 2.4576 MHz. This is a hardware-level feature-no software configuration or external filtering is required to suppress line noise in global deployments.
Is ADS1244IDGSTG4 pin-compatible with newer TI ADCs like ADS1248?
No, ADS1244IDGSTG4 is not pin-compatible with ADS1248 or other later-generation TI delta-sigma ADCs. ADS1248 uses a 32-pin TQFP package with SPI interface, integrated PGA, and different pin assignments-including separate REFOUT, AVSS, and multiple GPIOs-requiring full PCB redesign for migration.
ADS1244IDGSTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 15
- Number of Inputs:
- 1
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.5V ~ 5.25V
- Voltage - Supply, Digital:
- 1.8V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 10-VSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS1244IDGSTG4 FAQ
1.How can I place an order for ADS1244IDGSTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1244IDGSTG4 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 ADS1244IDGSTG4 reliable?
The price and inventory of ADS1244IDGSTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1244IDGSTG4 is usually 5 days.
3.What payment methods are accepted for ADS1244IDGSTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1244IDGSTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1244IDGSTG4?
ADS1244IDGSTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1244IDGSTG4 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 ADS1244IDGSTG4?
For technical support, including ADS1244IDGSTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1244IDGSTG4 requirements.
6.How does Aetrix verify that ADS1244IDGSTG4 is sourced from the original manufacturer or authorized distributors?
All ADS1244IDGSTG4 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 ADS1244IDGSTG4 meets industry standards.
7.What is the process for return or replacement of ADS1244IDGSTG4?
All ADS1244IDGSTG4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS1244IDGSTG4, 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 ADS1244IDGSTG4 part is unused and in its original packaging.
Return procedure for ADS1244IDGSTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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