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Texas Instruments TLA2021IRUGT
- Part No.:
- TLA2021IRUGT
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-XFQFN
- Datasheet:
-
TLA2021IRUGT.pdf
- Description:
- IC ADC 12BIT SIGMA-DELTA 10X2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,661
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Product details
Overview
TLA2021IRUGT from Texas Instruments is a single-channel, 12-bit delta-sigma analog-to-digital converter (ADC) designed for system monitoring in space-constrained, low-power applications. It features an integrated voltage reference and oscillator, I²C interface with three selectable addresses, 150 µA operating current, and fixed ±2.048 V full-scale range. It performs single-shot or continuous conversions at data rates up to 3.3 kSPS and operates from 2 V to 5.5 V supply.
For engineers reviewing the TLA2021IRUGT datasheet, TLA2021IRUGT pinout, TLA2021IRUGT application, or TLA2021IRUGT equivalent, this page delivers verified technical context, real-world use cases, pin-level design meaning, and validated alternative options - all grounded in TI's SBAS846 production datasheet and official device documentation.
Technical Context
The TLA2021IRUGT implements a switched-capacitor delta-sigma ADC core with internal 1-MHz oscillator (divided to 250 kHz modulator frequency), fixed-gain input stage, and digital filter. Its differential measurement architecture provides 90 dB common-mode rejection and 85 dB power-supply rejection, enabling accurate sensing in noisy environments.
It supports two functional modes: single-shot (auto power-down after conversion) and continuous-conversion (programmable data rate from 128–3300 SPS). The I²C interface complies with Standard-Mode (100 kHz) and Fast-Mode (400 kHz), with ADDR pin selecting among slave addresses 0x48, 0x49, or 0x4B.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes - ensures monotonic output across full scale for reliable threshold detection. |
| Data Rate | 128 to 3300 SPS - selectable via DR[2:0]; conversion time = 1/DR (e.g., 7.8 ms at 128 SPS). |
| Full-Scale Range | Fixed ±2.048 V - sets LSB = 1 mV; input must stay within GND–0.3 V to VDD+0.3 V. |
| Supply Current | 150 µA typical at 3.3 V - enables battery-powered operation for >1 year in periodic-sampling systems. |
| I²C Address Options | Three pin-selectable addresses (0x48/0x49/0x4B) - allows up to three TLA2021IRUGT devices on same bus without address conflict. |
| Operating Temp | –40°C to +85°C - qualified for industrial and consumer end equipment including HVAC and wearables. |
| INL Error | ±1 LSB max - guarantees ≤0.024% linearity error over full scale, critical for precision supply monitoring. |
Pinout & Package
TLA2021IRUGT uses a 10-pin X2QFN package (1.5 mm × 2.0 mm, 0.4 mm pitch), leadless and ultra-small for PCB area-sensitive designs like wearables and portable instrumentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - ADDR | Digital input | Selects I²C slave address (GND→0x48, VDD→0x49, SCL→0x4B); sampled at START condition edge. |
| 2 - NC | No connect | Internally unconnected; must remain floating per TI layout guidelines. |
| 3 - GND | Supply return | Primary ground reference for analog and digital sections; requires low-impedance connection to PCB ground plane. |
| 4 - AIN0 | Analog input (+) | Positive input for single-ended (vs GND) or differential (vs AIN1) measurements; ESD-protected. |
| 5 - AIN1 | Analog input (–) | Negative input for differential mode; externally tied to GND for single-ended use per datasheet guidance. |
| 6–7 - NC | No connect | Not bonded; must be left floating - no routing or copper fill allowed under these pads. |
| 8 - VDD | Power supply | 2–5.5 V analog/digital supply; requires 0.1 µF ceramic decoupling capacitor placed <1 mm from pin. |
| 9 - SDA | I²C bidirectional data | Open-drain I/O; requires external pullup to VDD (typically 2.2–10 kΩ); supports Standard/Fast Mode. |
| 10 - SCL | I²C clock input | Input-only clock line; master-driven; requires external pullup to VDD; timing compliant per JEDEC JESD8-12. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small X2QFN package | 1.5 mm × 2.0 mm footprint - reduces board area by >50% vs comparable 10-pin QFNs, ideal for wearables and compact modules. |
| Integrated voltage reference | On-chip 2.048 V reference - eliminates external reference component, saves BOM cost and layout space, and avoids reference drift calibration. |
| Low-power single-shot mode | 0.5 µA power-down current - enables microamp-level system sleep states between measurements, extending battery life. |
| Programmable data rate | 7 discrete rates (128–3300 SPS) - allows trade-off between noise performance (lower rate = higher effective resolution) and response speed. |
| Robust I²C interface | Supports 100/400 kHz with 3 address options - simplifies multi-device sensor networks without level shifters or address jumpers. |
Applications
| Battery Voltage Monitoring | Current Sensing |
|---|---|
|
Use Scenario: Measuring Li-ion cell voltage (2.5–4.2 V) in portable medical devices with 10-year shelf life requirement. IC Role / Device Role / Timing Role: Single-ended ADC sampling AIN0 vs GND; configured for 250 SPS to balance update rate and noise filtering. Use Value: Fixed ±2.048 V FSR with 1 mV LSB enables 0.1% accuracy over full battery range without PGA gain switching complexity. |
Use Scenario: Detecting overcurrent events in USB-C power delivery circuits using shunt resistor (10 mΩ) and rail-to-rail op-amp conditioning. IC Role / Device Role / Timing Role: Differential ADC measuring across RSHUNT; uses AIN0/AIN1 inputs with 128 SPS for high-resolution DC current capture. Use Value: 90 dB CMRR rejects common-mode noise from switching regulators, ensuring stable readings despite 5 V/3 A load transients. |
| Temperature Sensing | System Power Supply Monitoring |
|
Use Scenario: Reading NTC thermistor voltage divider in smart thermostat housing with ambient temperature range –10°C to +60°C. IC Role / Device Role / Timing Role: Single-ended ADC on AIN0 with external bias resistor; operates in single-shot mode triggered every 5 seconds. Use Value: 150 µA operating current and 0.5 µA power-down state minimize self-heating error and extend coin-cell battery life beyond 3 years. |
Use Scenario: Supervising 3.3 V and 5 V rails in industrial gateway controller to trigger fault shutdown before brownout. IC Role / Device Role / Timing Role: Continuous-conversion mode at 1600 SPS; monitors both rails via external resistor dividers scaled to ±2.048 V range. Use Value: ±1 LSB INL and 85 dB PSRR ensure accurate voltage tracking even during MCU load transients, reducing false trip risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit system-monitoring ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1115IRUGT | 4-channel MUX, programmable PGA (±0.256 V to ±6.144 V), 860 µA operating current, same X2QFN-10 package. | Supports multi-sensor monitoring (voltage + temp + current) on one IC; higher power draw limits battery life. | Choose ADS1115IRUGT when channel count and flexible gain outweigh power budget constraints. |
| MCP3421A0T-E/CH | Single-channel, 18-bit ΔΣ, no MUX, PGA, or oscillator; requires external reference and clock; SOT-23-6 package. | Higher resolution but larger conversion time (131 ms at 18-bit); lacks integration for rapid deployment. | Choose MCP3421A0T-E/CH only when 18-bit resolution is mandatory and board space permits external components. |
Compared with ADS1115IRUGT and MCP3421A0T-E/CH, the TLA2021IRUGT delivers optimal balance of integration, ultra-low power, and compact size for single-point monitoring - making it the preferred choice where PCB area and battery longevity are primary constraints.
Availability
TLA2021IRUGT is available at Aetrix Electronics and suitable for battery voltage monitoring, current sensing, temperature sensing, and system power supply monitoring requiring stable component supply and long-term manufacturability.
Supply support for TLA2021IRUGT 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The TLA202x family was engineered specifically for cost-sensitive, space-constrained system monitoring - integrating reference, oscillator, and I²C interface into the smallest possible footprint without sacrificing 12-bit accuracy or industrial temperature range.
FAQ
What is the full-scale input range of the TLA2021IRUGT?
The TLA2021IRUGT has a fixed full-scale range of ±2.048 V. This sets its least-significant bit (LSB) to exactly 1 mV, enabling precise 0.1% voltage measurements across its entire input span. Unlike the TLA2022/TLA2024, it does not include a programmable gain amplifier, so input signals must be conditioned externally to fit within this range. The TLA2021IRUGT datasheet confirms this value is non-configurable and applies across all operating conditions.
Does the TLA2021IRUGT require an external voltage reference?
No, the TLA2021IRUGT integrates a precision 2.048 V voltage reference internally. This eliminates the need for external reference components, reduces BOM count, and avoids layout sensitivity associated with reference routing. All gain error and drift specifications in the TLA2021IRUGT electrical characteristics table include contributions from this internal reference, and no external reference pin or option exists.
Can the TLA2021IRUGT measure differential signals?
Yes, the TLA2021IRUGT supports true differential measurements between AIN0 (positive) and AIN1 (negative) inputs. In differential mode, it rejects common-mode noise up to 90 dB, making it suitable for noisy environments like motor control or power supply monitoring. For single-ended use, AIN1 must be tied to GND externally - the device does not include an internal multiplexer or automatic GND switch like the TLA2024.
What are the I²C address options for the TLA2021IRUGT?
The TLA2021IRUGT offers three I²C slave addresses selected by the ADDR pin: 0x48 (ADDR = GND), 0x49 (ADDR = VDD), and 0x4B (ADDR = SCL). These addresses are sampled at the START condition edge, allowing dynamic reconfiguration without reset. This enables up to three TLA2021IRUGT devices on the same I²C bus - essential for multi-rail monitoring in compact systems.
How does the TLA2021IRUGT handle power management in battery-powered systems?
The TLA2021IRUGT supports two power modes: continuous-conversion (150 µA typical) and single-shot (0.5 µA in power-down). In single-shot mode, it powers up (~25 µs), completes one conversion, stores the result, and returns to ultra-low-power state automatically. This behavior makes the TLA2021IRUGT ideal for intermittent sensing tasks - such as hourly temperature logging - where average current can fall below 1 µA with proper host timing.
TLA2021IRUGT 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:
- -
TLA2021IRUGT FAQ
1.How can I place an order for TLA2021IRUGT through Aetrix?
Please submit a Request for Quotation (RFQ) for TLA2021IRUGT 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 TLA2021IRUGT reliable?
The price and inventory of TLA2021IRUGT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLA2021IRUGT is usually 5 days.
3.What payment methods are accepted for TLA2021IRUGT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLA2021IRUGT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLA2021IRUGT?
TLA2021IRUGT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLA2021IRUGT 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 TLA2021IRUGT?
For technical support, including TLA2021IRUGT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLA2021IRUGT requirements.
6.How does Aetrix verify that TLA2021IRUGT is sourced from the original manufacturer or authorized distributors?
All TLA2021IRUGT 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 TLA2021IRUGT meets industry standards.
7.What is the process for return or replacement of TLA2021IRUGT?
All TLA2021IRUGT units undergo pre-shipment inspection (PSI). If there is an issue with TLA2021IRUGT, 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 TLA2021IRUGT part is unused and in its original packaging.
Return procedure for TLA2021IRUGT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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