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Texas Instruments ADS1219IRTET
- Part No.:
- ADS1219IRTET
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
ADS1219IRTET.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 16WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:244
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Product details
Overview
ADS1219IRTET from Texas Instruments is a 24-bit delta-sigma analog-to-digital converter (ADC) designed for precision voltage, current, and temperature monitoring in battery-powered and industrial systems. It features two differential or four single-ended inputs, programmable gain (1 or 4), internal 2.048-V reference (5 ppm/°C drift), I²C interface with 16 configurable addresses, and operates from 2.3 V to 5.5 V with as low as 315 µA typical supply current.
For engineers reviewing the ADS1219IRTET datasheet, ADS1219IRTET pinout, ADS1219IRTET application, or ADS1219IRTET equivalent, key selection criteria include its single-register configuration simplicity, simultaneous 50/60-Hz rejection at 20 SPS, rail-to-rail input buffers enabling direct high-impedance sensor interfacing, and WQFN-16 package suitability for space-constrained designs.
Technical Context
The ADS1219IRTET integrates a switched-capacitor delta-sigma modulator with a single-cycle settling digital filter supporting data rates of 20/90/330/1000 SPS. Its MUX selects between four analog inputs (AIN0–AIN3) for differential or single-ended configurations, feeding rail-to-rail input buffers followed by a programmable gain stage (G = 1 or 4) before conversion.
It uses an internal low-drift 2.048-V reference (±0.04% accuracy, 5 ppm/°C typical drift) and a 1.024-MHz oscillator (±1% accuracy). The I²C interface supports Standard-, Fast-, and Fast-Mode Plus (up to 1 Mbps), with address pins A0/A1 enabling 16 unique slave addresses - critical for multi-device sensor nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit no-missing-codes architecture ensures full dynamic range integrity for precision measurement applications. |
| Data Rate | Configurable 20/90/330/1000 SPS - 20 SPS enables simultaneous 50-Hz and 60-Hz line-noise rejection with single-cycle settling. |
| Input Configuration | Two differential or four single-ended inputs via integrated MUX - eliminates external multiplexing circuitry in multi-sensor systems. |
| Gain Options | Programmable 1× or 4× gain - extends effective input range down to ±512 mV (G=4) for low-level thermistor or shunt-based current sensing. |
| Reference | Internal 2.048-V reference with 5 ppm/°C typical drift - reduces BOM count and improves thermal stability vs. external references. |
| Supply Range | 2.3 V to 5.5 V analog/digital supplies - supports direct connection to Li-ion batteries (3.0–4.2 V) or 3.3-V/5-V system rails. |
| Current Consumption | 315 µA typical in conversion mode with internal reference - enables >1-year operation on coin-cell batteries in periodic-readout systems. |
Pinout & Package
ADS1219IRTET is housed in a 3.0-mm × 3.0-mm × 0.75-mm, 16-pin WQFN package (RTE) with exposed thermal pad connected to AGND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1 | I²C address select inputs | Configure one of 16 unique I²C slave addresses - essential for daisy-chained sensor arrays without address conflicts. |
| AIN0–AIN3 | Analog input terminals | Support flexible signal routing: any pair forms differential input (e.g., AIN0/AIN1), or all four used as independent single-ended channels. |
| REFP / REFN | Differential reference inputs | Accept internal 2.048-V reference or external reference (0.75 V to AVDD); enable ratiometric measurements with external sensors. |
| AVDD / AGND | Analog power supply | Separate analog domain minimizes digital noise coupling; requires local 100-nF decoupling to AGND per datasheet layout guidelines. |
| DVDD / DGND | Digital power supply | Digital domain isolated from analog ground - mandatory for maintaining PSRR >105 dB and CMRR >105 dB performance. |
| SDA / SCL | I²C bidirectional data/clock | Support up to 1 Mbps (Fast-Mode Plus); require DVDD-referenced pull-up resistors - compatible with standard microcontroller I²C peripherals. |
| DRDY | Data-ready indicator | Active-low open-drain output signals conversion completion - allows interrupt-driven readout, eliminating polling overhead in MCU firmware. |
| RESET | Hardware reset input | Asynchronous active-low reset clears internal registers and restarts conversion sequence - critical for recovery after brown-out or communication errors. |
Key Features
| Feature | Design Value |
|---|---|
| Single-register configuration | Entire device behavior (gain, data rate, MUX selection, conversion mode) controlled via one 8-bit register - reduces firmware complexity and initialization time. |
| Rail-to-rail input buffers | Enable direct connection of high-impedance sources (e.g., thermistors, RTDs, pH electrodes) without signal degradation or external op-amp buffering. |
| Simultaneous 50/60-Hz rejection | Digital filter achieves >78 dB NMRR at both frequencies simultaneously at 20 SPS - eliminates need for external notch filters in noisy AC environments. |
| Low-power conversion mode | 315 µA typical current draw with internal reference - enables ultra-low-power operation in portable gas detectors or wearable health monitors. |
| 16 I²C address options | Two hardware address pins (A0/A1) support up to 16 identical ADS1219IRTET devices on one bus - simplifies multi-channel data acquisition without software address management. |
Applications
| Battery Test Equipment | Gas Detectors |
|---|---|
Use Scenario: Monitoring cell voltage, charge/discharge current, and temperature during electrochemical impedance spectroscopy (EIS) testing of Li-ion batteries. IC Role / Device Role / Timing Role: Precision ADC capturing synchronized voltage/current/temperature samples at 20–1000 SPS with simultaneous 50/60-Hz noise rejection. Use Value: Enables accurate capacity estimation and state-of-health analysis using high-resolution 24-bit data without external filtering or amplification. | Use Scenario: Reading electrochemical sensor outputs in portable CO or combustible gas detectors powered by CR2032 batteries. IC Role / Device Role / Timing Role: Low-power ADC digitizing microamp-level sensor currents with rail-to-rail buffered inputs and programmable gain for signal scaling. Use Value: Achieves >1-year battery life via 315 µA typical operating current and supports single-shot conversions triggered only during alarm-check intervals. |
| Heat Meters | Wearable Fitness Trackers |
Use Scenario: Measuring temperature differentials across heat exchangers and flow sensor voltages in ultrasonic heat metering systems. IC Role / Device Role / Timing Role: Dual-differential-input ADC acquiring ΔT (RTD pairs) and flow transducer signals with internal 2.048-V reference for ratiometric accuracy. Use Value: Eliminates external reference and buffer ICs, reducing bill-of-materials cost while maintaining metrological compliance (OIML R75). | Use Scenario: Digitizing bio-potential signals (ECG, PPG) and thermistor-based skin temperature in compact wearable bands. IC Role / Device Role / Timing Role: Small-footprint ADC providing 24-bit resolution with programmable gain (G=4) for low-amplitude biometric signals and low quiescent current for extended runtime. Use Value: Enables clinical-grade signal fidelity in sub-100-mm² form factors while meeting ISO 14155 biocompatibility and power-efficiency requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1220IPWR | 4-channel, 24-bit, SPI interface; includes PGA (1–128×), burnout current sources, and CRC; no internal oscillator. | Better suited for high-gain sensor excitation (e.g., load cells) but requires external clock and SPI host - less ideal for I²C-only microcontrollers. | Select ADS1220IPWR when higher gain flexibility, sensor diagnostics, or SPI integration are required; ADS1219IRTET remains optimal for I²C simplicity and lowest power. |
| AD7124-4BRUZ | 4-channel, 24-bit, SPI interface; integrated PGA (1–128×), reference, and diagnostic features; supports 1.8-V IO. | Targets industrial PLC modules needing robust diagnostics and wider supply range (1.8–3.6 V IO), but consumes ~380 µA - higher than ADS1219IRTET's 315 µA. | Choose AD7124-4BRUZ for safety-critical diagnostics and 1.8-V compatibility; ADS1219IRTET offers superior power efficiency and I²C-native design for portable systems. |
Compared with ADS1220IPWR and AD7124-4BRUZ, the ADS1219IRTET delivers the lowest active current (315 µA), simplest I²C configuration (single register), and smallest footprint (3×3 mm WQFN), making it uniquely suited for space- and energy-constrained sensor nodes where ease of integration outweighs advanced diagnostics.
Availability
ADS1219IRTET is available at Aetrix Electronics and suitable for battery test equipment, gas detectors, and heat meters requiring stable component supply, long-term lifecycle support, and traceable sourcing for medical and industrial certifications.
Supply support for ADS1219IRTET 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 ADS1219IRTET belongs to TI's precision delta-sigma ADC product line, engineered specifically for simplified, low-power voltage/current/temperature monitoring in portable and industrial instrumentation - minimizing external components while maximizing measurement integrity.
FAQ
What is the maximum data rate supported by the ADS1219IRTET?
The ADS1219IRTET supports four programmable data rates: 20 SPS, 90 SPS, 330 SPS, and 1000 SPS. At 1000 SPS, it achieves single-cycle settling with 16.75 bits of noise-free resolution (G=1, internal reference). The 20 SPS setting provides optimal noise rejection, delivering simultaneous 50-Hz and 60-Hz line-frequency rejection with >78 dB NMRR - critical for industrial sensor applications. All rates are selected via a single configuration bit in the device's control register.
Does the ADS1219IRTET require external components for basic operation?
The ADS1219IRTET is designed for minimal external components: only two 100-nF decoupling capacitors (one from AVDD to AGND, one from DVDD to DGND) and DVDD-referenced pull-up resistors on SDA/SCL/DRDY are mandatory. Its integrated 2.048-V reference, 1.024-MHz oscillator, rail-to-rail input buffers, and programmable gain eliminate the need for external references, clocks, op-amps, or PGAs in most monitoring applications - significantly reducing PCB area and BOM cost compared to discrete ADC solutions.
How does the ADS1219IRTET handle noise rejection in electrically noisy environments?
The ADS1219IRTET employs a single-cycle settling digital filter optimized for simultaneous 50-Hz and 60-Hz normal-mode rejection at 20 SPS, achieving 78–88 dB NMRR. Its delta-sigma architecture inherently provides strong common-mode rejection (>105 dB CMRR at DC), and the separate AGND/DGND domains with dedicated analog/digital supplies suppress supply-induced noise. Combined with rail-to-rail input buffers that isolate high-impedance sensors from PCB noise, this enables reliable operation in industrial settings without external notch filters or shielding.
Can the ADS1219IRTET interface directly with a microcontroller lacking hardware I²C support?
Yes - the ADS1219IRTET's I²C interface complies with Standard-, Fast-, and Fast-Mode Plus specifications (up to 1 Mbps), and its timing requirements (e.g., tSU;DAT ≥50 ns in Fast-Mode Plus) are achievable with bit-banged GPIO on most modern microcontrollers. The device requires only SDA, SCL, and optionally DRDY for interrupt-driven reads. Its simple command set (six total I²C commands) and single-register configuration make firmware implementation straightforward, even without dedicated I²C peripherals.
What is the operating temperature range specified for the ADS1219IRTET?
The ADS1219IRTET is fully specified over an industrial temperature range of –40°C to +125°C. This includes all electrical characteristics - such as offset drift (0.02–0.1 µV/°C), gain drift (0.3–2 ppm/°C), reference drift (5–30 ppm/°C), and supply current - ensuring reliable performance in demanding environments like automotive under-hood sensors, industrial motor drives, and outdoor utility meters. The WQFN-16 package's thermal metrics (RθJA = 57.7°C/W) further support sustained operation at elevated ambient temperatures.
ADS1219IRTET Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 1k
- Number of Inputs:
- 4
- Input Type:
- Differential, Single Ended
- Data Interface:
- I2C
- Configuration:
- MUX-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.3V ~ 5.5V
- Voltage - Supply, Digital:
- 2.3V ~ 5.5V
- Features:
- PGA
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 16-WQFN (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS1219IRTET FAQ
1.How can I place an order for ADS1219IRTET through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1219IRTET 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 ADS1219IRTET reliable?
The price and inventory of ADS1219IRTET are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1219IRTET is usually 5 days.
3.What payment methods are accepted for ADS1219IRTET?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1219IRTET transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1219IRTET?
ADS1219IRTET orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1219IRTET 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 ADS1219IRTET?
For technical support, including ADS1219IRTET datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1219IRTET requirements.
6.How does Aetrix verify that ADS1219IRTET is sourced from the original manufacturer or authorized distributors?
All ADS1219IRTET 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 ADS1219IRTET meets industry standards.
7.What is the process for return or replacement of ADS1219IRTET?
All ADS1219IRTET units undergo pre-shipment inspection (PSI). If there is an issue with ADS1219IRTET, 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 ADS1219IRTET part is unused and in its original packaging.
Return procedure for ADS1219IRTET:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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