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Texas Instruments TLA2021IRUGR
- Part No.:
- TLA2021IRUGR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-XFQFN
- Datasheet:
-
TLA2021IRUGR.pdf
- Description:
- IC ADC 12BIT SIGMA-DELTA 10X2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:9,108
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Product details
Overview
TLA2021IRUGR from Texas Instruments is a single-channel, 12-bit delta-sigma analog-to-digital converter (ADC) designed for system monitoring in space-constrained applications. It features an integrated voltage reference, oscillator, and I²C interface; operates from 2 V to 5.5 V; consumes only 150 µA during operation; and supports programmable data rates from 128 SPS to 3.3 kSPS. It is used for battery voltage supervision, current sensing via shunt resistors, and temperature measurement with thermistors.
For engineers reviewing the TLA2021IRUGR datasheet, TLA2021IRUGR pinout, TLA2021IRUGR application, or TLA2021IRUGR equivalent, key selection considerations include its fixed ±2.048 V full-scale range, absence of PGA or multiplexer, ultra-small 10-pin X2QFN (1.5 mm × 2.0 mm) package, and compatibility with standard- and fast-mode I²C buses up to 400 kHz.
Technical Context
The TLA2021IRUGR implements a differential switched-capacitor delta-sigma modulator with digital filtering, using an internal 1-MHz oscillator divided to 250-kHz modulation frequency. Its ADC core measures the difference between AIN0 (AINP) and AIN1 (AINN), with common-mode rejection ratio of 90 dB and power-supply rejection ratio of 85 dB.
It operates exclusively in single-ended (AIN0–GND) or differential (AIN0–AIN1) mode - no input multiplexer - and lacks programmable gain. Conversion is initiated via I²C register write to the OS bit, after which the device automatically powers down post-conversion, achieving 0.5 µA quiescent current in power-down state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes; delivers 4096 discrete output levels for precise system monitoring. |
| Data Rate | Programmable from 128 to 3300 samples per second; enables trade-off between noise performance and update speed. |
| Full-Scale Range | Fixed ±2.048 V; defines maximum measurable differential input without clipping or saturation. |
| Supply Current | 150 µA typical at 3.3 V; supports battery-powered and low-power embedded monitoring systems. |
| I²C Interface | Standard- and fast-mode compatible (100/400 kHz); uses ADDR pin for 3 selectable slave addresses (1001000–1001011). |
| Operating Temp | –40°C to +85°C; qualified for industrial and consumer electronics environments including HVAC and wearables. |
| Input Impedance | ~6 MΩ common-mode at ±2.048 V FSR; requires low-impedance signal sources or external buffering for high-Z sensors. |
Pinout & Package
TLA2021IRUGR is housed in a 10-pin, leadless X2QFN package measuring 1.50 mm × 2.00 mm with wettable flanks, optimized for automated optical inspection and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 – ADDR | Digital input | Selects I²C slave address (GND/VDD/SCL); determines bus address without external EEPROM or jumpers. |
| 2 – NC | No connect | Internally unconnected; must remain floating per datasheet - not for grounding or routing. |
| 3 – GND | Supply return | Primary analog and digital ground reference; requires low-inductance connection to system ground plane. |
| 4 – AIN0 | Analog input (+) | Positive input for differential measurements or single-ended input referenced to GND. |
| 5 – AIN1 | Analog input (–) | Negative input for differential mode; must be tied to GND externally for single-ended use. |
| 6 – NC | No connect | Not bonded; must remain unconnected - no routing or thermal pad tie-in. |
| 7 – NC | No connect | Not bonded; floating per TI RUG package specification. |
| 8 – VDD | Power supply | 2 V to 5.5 V analog/digital supply; requires local 0.1-µF ceramic decoupling to GND. |
| 9 – SDA | I²C bidirectional data | Open-drain I/O; requires external pullup to VDD (typically 2.2–10 kΩ) for proper bus signaling. |
| 10 – SCL | I²C clock input | Input-only clock line; driven by master; also requires external pullup to VDD. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small footprint | 10-pin X2QFN (1.5 mm × 2.0 mm); reduces board area by >50% vs. comparable SOIC-8 ADCs. |
| Integrated oscillator | 1-MHz on-chip oscillator; eliminates need for external crystal or clock source, simplifying BOM. |
| On-chip voltage reference | Internal precision reference; removes external reference IC and associated layout sensitivity. |
| Low-power operation | 150 µA active / 0.5 µA power-down; extends battery life in portable instrumentation and wearables. |
| I²C address flexibility | Three pin-selectable addresses via single ADDR pin; enables multi-device bus configuration without address conflicts. |
Applications
| Battery Voltage Monitoring | Current Sensing |
|---|---|
|
Use Scenario: Real-time monitoring of Li-ion battery pack voltage in portable medical devices or Bluetooth headsets. IC Role / Device Role / Timing Role: Single-ended ADC measuring VBAT across resistor divider; provides 12-bit resolution at ≤1 kSPS for state-of-charge estimation. Use Value: Enables accurate low-power voltage tracking without external reference or clock, reducing component count and layout complexity. |
Use Scenario: Shunt-based current measurement in USB-C power delivery adapters or smart chargers. IC Role / Device Role / Timing Role: Differential ADC measuring mV-level drop across RSHUNT; configured for ±2.048 V FSR to resolve sub-10 mA changes. Use Value: Delivers stable 12-bit accuracy over temperature (±1 LSB INL, 10 ppm/°C gain drift) without PGA calibration overhead. |
| Thermistor-Based Temperature Sensing | System Power Supply Supervision |
|
Use Scenario: Ambient temperature measurement in smart thermostats or IoT edge nodes using NTC thermistor + bias resistor network. IC Role / Device Role / Timing Role: Single-ended ADC reading thermistor voltage divider output; leverages internal reference for ratiometric stability. Use Value: Eliminates need for external reference or precision bias current source, improving long-term drift performance and cost efficiency. |
Use Scenario: Monitoring 3.3 V and 5 V rails in industrial PLC modules or gateway routers for brownout detection. IC Role / Device Role / Timing Role: ADC digitizing scaled supply voltage; triggers alert when value falls below threshold in continuous-conversion mode. Use Value: Provides deterministic response time (≤780 µs at 128 SPS) and immunity to supply ripple due to 90 dB CMRR. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar system-monitoring ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1115IDGSR | 4-channel, PGA-equipped, same 12-bit resolution and I²C interface; larger MSOP-10 package (3 mm × 3 mm). | Supports multiplexed 4-input monitoring and programmable gain (±0.256 V to ±6.144 V); better for multi-rail or low-level signal systems. | Choose ADS1115IDGSR when channel count, PGA flexibility, or higher input sensitivity are required - not pin-compatible. |
| MCP3221A0T-E/OT | Single-channel, 12-bit SAR ADC; SOT-23-6 package; no internal reference or oscillator; requires external clock and reference. | Lacks integrated timing and reference; lower power (150 nA sleep) but higher design overhead for signal conditioning and timing. | Choose MCP3221A0T-E/OT only if minimal footprint (SOT-23) and ultra-low sleep current outweigh integration benefits. |
Compared with ADS1115IDGSR and MCP3221A0T-E/OT, the TLA2021IRUGR offers superior integration (reference + oscillator + I²C) in the smallest footprint, ideal for cost- and space-sensitive single-rail monitoring where PGA or multi-channel capability is unnecessary.
Availability
TLA2021IRUGR is available at Aetrix Electronics and suitable for battery voltage monitoring, current sensing, and thermistor-based temperature measurement requiring stable component supply and long-term industrial availability.
Supply support for TLA2021IRUGR 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 system solutions.
The TLA202x family - including TLA2021IRUGR - was engineered specifically for cost-optimized, ultra-compact system monitoring in personal electronics, home appliances, and building automation, emphasizing integration, small size, and ease of use.
FAQ
What is the full-scale input range of the TLA2021IRUGR?
The TLA2021IRUGR has a fixed full-scale range of ±2.048 V for differential inputs (AIN0–AIN1) or single-ended inputs (AIN0–GND). This range is not programmable and is set by the internal voltage reference and ADC architecture. Applying signals beyond ±2.048 V risks saturation or damage if exceeding absolute maximum ratings (GND – 0.3 V to VDD + 0.3 V).
Does the TLA2021IRUGR include a programmable gain amplifier (PGA)?
No, the TLA2021IRUGR does not include a PGA. Unlike the TLA2022IRUGR and TLA2024IRUGR, the TLA2021IRUGR omits the PGA block entirely. Its input stage directly interfaces the delta-sigma modulator with fixed ±2.048 V full-scale range, making it suitable for medium-level signals without amplification.
How many analog input channels does the TLA2021IRUGR support?
The TLA2021IRUGR supports one analog input channel: either a differential pair (AIN0 and AIN1) or a single-ended input (AIN0 referenced to GND, with AIN1 externally tied to GND). It does not include a multiplexer - unlike the TLA2024IRUGR - and cannot switch between multiple inputs.
What I²C addresses are supported by the TLA2021IRUGR?
The TLA2021IRUGR supports three I²C slave addresses selected via the ADDR pin: 1001000 (ADDR = GND), 1001001 (ADDR = VDD), and 1001011 (ADDR = SCL). These correspond to 7-bit addresses 0x48, 0x49, and 0x4B in hexadecimal. No external address pins or configuration registers are needed.
What is the operating supply voltage range for the TLA2021IRUGR?
The TLA2021IRUGR operates from 2.0 V to 5.5 V on the VDD pin. It maintains specified performance - including 12-bit linearity and 150 µA supply current - across this full range. At 3.3 V, it achieves optimal balance of power efficiency and noise performance for most system-monitoring applications.
TLA2021IRUGR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-XFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 3.3k
- Number of Inputs:
- 1
- Input Type:
- Differential, Single Ended
- Data Interface:
- I2C
- Configuration:
- ADC
- Ratio - S/H:ADC:
- 0:1
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 2V ~ 5.5V
- Voltage - Supply, Digital:
- 2V ~ 5.5V
- Features:
- Selectable Address
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 10-X2QFN (2x1.5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
TLA2021IRUGR FAQ
1.How can I place an order for TLA2021IRUGR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLA2021IRUGR 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 TLA2021IRUGR reliable?
The price and inventory of TLA2021IRUGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLA2021IRUGR is usually 5 days.
3.What payment methods are accepted for TLA2021IRUGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLA2021IRUGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLA2021IRUGR?
TLA2021IRUGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLA2021IRUGR 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 TLA2021IRUGR?
For technical support, including TLA2021IRUGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLA2021IRUGR requirements.
6.How does Aetrix verify that TLA2021IRUGR is sourced from the original manufacturer or authorized distributors?
All TLA2021IRUGR 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 TLA2021IRUGR meets industry standards.
7.What is the process for return or replacement of TLA2021IRUGR?
All TLA2021IRUGR units undergo pre-shipment inspection (PSI). If there is an issue with TLA2021IRUGR, 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 TLA2021IRUGR part is unused and in its original packaging.
Return procedure for TLA2021IRUGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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