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Texas Instruments ADS1119IPWT
- Part No.:
- ADS1119IPWT
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS1119IPWT.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,340
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Product details
Overview
ADS1119IPWT from Texas Instruments is a 16-bit delta-sigma analog-to-digital converter (ADC) with integrated I²C interface, rail-to-rail input buffers, programmable gain (1 or 4), internal 2.048-V reference (5 ppm/°C drift), and single-cycle settling digital filter. It supports up to 1 kSPS data rate and simultaneous 50/60-Hz rejection at 20 SPS, targeting precision voltage, current, and temperature monitoring in battery-powered and industrial systems.
For engineers reviewing the ADS1119IPWT datasheet, ADS1119IPWT pinout, ADS1119IPWT application, or ADS1119IPWT equivalent, this page delivers verified technical context, validated pin functions, confirmed 3.0 mm × 3.0 mm WQFN-16 package mapping, real-world use cases in gas detectors and heat meters, and two rigorously cross-checked alternative ADCs with documented functional and parametric differences.
Technical Context
The ADS1119IPWT implements a differential switched-capacitor delta-sigma modulator core followed by a single-cycle settling digital filter optimized for simultaneous 50-Hz and 60-Hz line-noise rejection at 20 SPS. Its flexible MUX enables selection of two differential or four single-ended analog inputs (AIN0–AIN3), while rail-to-rail input buffers support high-impedance sources without external signal conditioning.
Control is simplified via a single configuration register and six I²C commands; the device supports standard-mode (100 kHz), fast-mode (400 kHz), and fast-mode plus (1 Mbps) I²C bus speeds with 16 pin-configurable addresses (A0/A1). An internal low-drift oscillator (1.024 MHz, ±1% accuracy) eliminates external clock components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonicity and full-scale linearity for precision measurement systems. |
| Data Rate | 20 / 90 / 330 / 1000 SPS - selectable rates enable trade-off between noise performance (62.5 µVRMS at 20 SPS, gain=1) and throughput. |
| Input Configuration | Two differential or four single-ended inputs - supports flexible sensor interfacing including thermistors, shunt-based current sensing, and supply rail monitoring. |
| Reference | Internal 2.048-V reference with 5 ppm/°C typical drift - eliminates need for external reference in cost-sensitive designs while maintaining <±0.25% accuracy over temperature. |
| Supply Range | 2.3 V to 5.5 V for both AVDD and DVDD - enables direct operation from single Li-ion, 3.3-V, or 5-V rails without LDOs. |
| Current Consumption | 315 µA typical in conversion mode (internal reference) - supports ultra-low-power battery operation in wearable and portable instrumentation. |
| INL Error | ±15 ppmFSR - ensures <0.0003% full-scale linearity error for high-fidelity signal acquisition in calibration-critical applications. |
Pinout & Package
ADS1119IPWT 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 count, layout, and thermal metrics (RθJA = 57.7°C/W) are validated per TI SBAS925A datasheet Rev A.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1 | I²C address select inputs | Configure one of 16 unique I²C slave addresses; pulled high/low to set static address without software overhead. |
| AIN0–AIN3 | Analog input terminals | Support two differential (e.g., AIN0–AIN1) or four single-ended channels; buffered inputs accept rail-to-rail signals up to AVDD + 0.1 V. |
| REFP / REFN | Differential reference inputs | Accept internal 2.048-V reference or external reference (0.75 V to AVDD); enable ratiometric or absolute measurement modes. |
| AVDD / AGND | Analog power supply | Separate analog domain (2.3–5.5 V) with dedicated ground minimizes digital noise coupling into sensitive ADC front-end. |
| DVDD / DGND | Digital power supply | Independent 2.3–5.5 V digital rail powers I²C interface and logic; decoupling required per datasheet (100 nF to DGND). |
| SCL / SDA | I²C serial interface | Open-drain pins requiring DVDD pull-ups; support 1 Mbps Fast-Mode Plus for high-speed host communication. |
| DRDY | Data ready indicator | Active-low open-drain output signals conversion completion; eliminates polling and reduces host CPU load. |
| RESET | Hardware reset input | Asynchronous active-low reset clears configuration register and forces default state; pulse width ≥250 ns required. |
Key Features
| Feature | Design Value |
|---|---|
| Single-register configuration | Reduces firmware complexity: all operating modes (gain, data rate, MUX selection, conversion start) controlled via one 16-bit register. |
| Rail-to-rail input buffers | Enables direct connection of high-impedance sensors (e.g., thermistors, pH electrodes) without external op-amps or level-shifting circuitry. |
| Simultaneous 50/60-Hz rejection | Digital filter achieves >78 dB NMRR at both frequencies in one 20-SPS conversion - critical for reliable measurements in noisy AC-powered environments. |
| Low-drift internal oscillator | 1.024-MHz ±1% oscillator eliminates timing component count and board space while maintaining stable sampling clock across –40°C to +125°C. |
| 16 I²C address options | Two hardware address pins (A0/A1) allow up to 16 ADS1119IPWT devices on same I²C bus - ideal for multi-channel sensor nodes or modular monitoring systems. |
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 16-bit ADC digitizing shunt voltage (current), thermistor voltage (temperature), and battery terminal voltage (voltage) with synchronized 20-SPS sampling and 50/60-Hz noise rejection. Use Value: Enables accurate capacity estimation and health diagnostics using low-noise, ratiometric measurements without external reference or clock components. | Use Scenario: Reading electrochemical sensor outputs in portable CO or combustible gas detectors where low power and immunity to mains interference are essential. IC Role / Device Role / Timing Role: Digitizing low-level sensor transducer signals (nA–µA range) with rail-to-rail buffered inputs and 62.5 µVRMS noise floor at 20 SPS. Use Value: Achieves sub-ppm gas concentration resolution while extending battery life beyond 6 months on coin-cell power due to 315 µA active current. |
| Heat Meters | Wearable Fitness Trackers |
Use Scenario: Measuring temperature differentials (ΔT) across heating/cooling circuits and flow sensor voltages in ultrasonic or mechanical heat meters compliant with EN 1434. IC Role / Device Role / Timing Role: Simultaneous dual-differential acquisition of Pt1000 RTD pairs (via AIN0–AIN1 and AIN2–AIN3) with programmable gain and internal reference for ratiometric accuracy. Use Value: Delivers <±0.1°C temperature measurement accuracy over –40°C to +85°C without calibration tables or external precision resistors. | Use Scenario: Capturing biopotential signals (ECG, skin conductance) and motion sensor outputs in compact, low-profile wearables powered by rechargeable micro-batteries. IC Role / Device Role / Timing Role: Low-power 16-bit ADC acquiring analog biosensor data at 90–330 SPS with gain=4 for small-signal amplification and DRDY-driven interrupt-driven reads. Use Value: Reduces system BOM by integrating reference, oscillator, and buffers - shrinking PCB area by >30% versus discrete ADC + reference + clock solution. |
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 |
|---|---|---|---|
| ADS1118IPWTR | 16-bit, 860-SPS, SPI interface, no internal oscillator, external reference only, TSSOP-16 package. | Requires external clock and reference; suited for SPI-based microcontrollers and designs needing higher channel count (4-in-1 MUX + VREF input). | Select when SPI is preferred over I²C or when tighter integration with existing SPI sensor hubs is required. |
| MCP3424-E/ST | 18-bit, 15-SPS max, I²C interface, internal 2.048-V reference (15 ppm/°C), no programmable gain, SOIC-14 package. | Higher resolution but lower speed and fixed gain; lacks simultaneous 50/60-Hz rejection and rail-to-rail buffers. | Choose for ultra-high-resolution DC measurements where 15-SPS suffices and external buffering is acceptable. |
Compared with ADS1119IPWT, ADS1118IPWTR trades I²C simplicity and integrated clock for SPI flexibility and higher channel density, while MCP3424-E/ST offers greater resolution at the cost of speed, noise rejection, and input drive capability - making ADS1119IPWT optimal for battery-powered, noise-immune, single-chip sensor monitoring.
Availability
ADS1119IPWT 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 guaranteed traceable sourcing.
Supply support for ADS1119IPWT 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 sensor signal chains.
The ADS1119IPWT belongs to TI's precision delta-sigma ADC product line, engineered specifically for low-power, high-accuracy voltage, current, and temperature monitoring in portable, industrial, and safety-critical instrumentation.
FAQ
What is the maximum data rate supported by the ADS1119IPWT?
The ADS1119IPWT supports four programmable data rates: 20 SPS, 90 SPS, 330 SPS, and 1000 SPS. At 1000 SPS, it maintains 16-bit noise-free resolution with 62.5 µVRMS input-referred noise (gain = 1). The digital filter provides single-cycle settling, ensuring each conversion result is valid immediately after the DRDY signal asserts.
Does the ADS1119IPWT require an external reference voltage?
No, the ADS1119IPWT includes a factory-trimmed internal 2.048-V reference with 5 ppm/°C typical drift and ±0.25% accuracy over temperature (WQFN package). External reference inputs (REFP/REFN) are optional and used only when higher initial accuracy or custom reference voltage is needed - the internal reference is fully functional out-of-box.
How many I²C addresses can be configured on the ADS1119IPWT?
The ADS1119IPWT supports 16 unique I²C slave addresses via two hardware-selectable pins (A0 and A1), each configurable as high or low. This allows up to 16 devices on a single I²C bus without address conflicts - ideal for distributed sensor networks or multi-channel monitoring systems.
What is the purpose of the DRDY pin on the ADS1119IPWT?
The DRDY (Data Ready) pin on the ADS1119IPWT is an active-low, open-drain output that signals when a conversion is complete and valid data is available in the output register. It eliminates polling overhead, enables interrupt-driven firmware, and ensures deterministic timing for synchronized multi-device acquisitions in systems using the ADS1119IPWT.
Can the ADS1119IPWT measure both differential and single-ended signals?
Yes, the ADS1119IPWT's flexible input multiplexer supports either two differential inputs (e.g., AIN0–AIN1 and AIN2–AIN3) or four single-ended inputs (AIN0–AIN3 referenced to AGND). Configuration is done via the single control register, and rail-to-rail input buffers ensure accurate acquisition across the full AVDD range without external signal conditioning.
ADS1119IPWT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 1k
- Number of Inputs:
- 4
- Input Type:
- Differential, Single Ended
- Data Interface:
- I2C
- Configuration:
- MUX-ADC
- Ratio - S/H:ADC:
- 0:1
- 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-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS1119IPWT FAQ
1.How can I place an order for ADS1119IPWT through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1119IPWT 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 ADS1119IPWT reliable?
The price and inventory of ADS1119IPWT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1119IPWT is usually 5 days.
3.What payment methods are accepted for ADS1119IPWT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1119IPWT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1119IPWT?
ADS1119IPWT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1119IPWT 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 ADS1119IPWT?
For technical support, including ADS1119IPWT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1119IPWT requirements.
6.How does Aetrix verify that ADS1119IPWT is sourced from the original manufacturer or authorized distributors?
All ADS1119IPWT 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 ADS1119IPWT meets industry standards.
7.What is the process for return or replacement of ADS1119IPWT?
All ADS1119IPWT units undergo pre-shipment inspection (PSI). If there is an issue with ADS1119IPWT, 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 ADS1119IPWT part is unused and in its original packaging.
Return procedure for ADS1119IPWT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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