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Texas Instruments TLA2518IRTET
- Part No.:
- TLA2518IRTET
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
TLA2518IRTET.pdf
- Description:
- IC ADC 12BIT SAR 16WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:556
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Product details
Overview
TLA2518IRTET from Texas Instruments is a small, 8-channel, 12-bit, 1-MSPS successive approximation register (SAR) ADC with integrated GPIOs and programmable averaging filters. It operates from AVDD = 2.35 V to 5.5 V and DVDD = 1.65 V to 5.5 V, supports SPI up to 60 MHz, and delivers 72.9 dB SINAD at 2 kHz - enabling high-accuracy monitoring in space-constrained power electronics systems.
For engineers reviewing the TLA2518IRTET datasheet, TLA2518IRTET pinout, TLA2518IRTET application, or TLA2518IRTET equivalent, this page provides verified technical context, real-world use cases, validated alternatives, and supply-ready procurement details for macro RRU, BMS, and solar inverter signal acquisition.
Technical Context
The TLA2518IRTET integrates an internal oscillator for autonomous conversion timing and uses AVDD as its reference voltage. Its 8-channel multiplexer supports per-pin configuration as analog input, digital input, or push-pull/open-drain digital output - all controlled via PIN_CFG, GPIO_CFG, and GPO_DRIVE_CFG registers.
Programmable averaging (OSR[2:0], 1–128 samples) produces 16-bit results with internal oversampling, reducing host read overhead and noise sensitivity. The enhanced-SPI interface supports all four standard protocols (SPI-00/01/10/11), with automatic protocol initialization on power-up using SPI-00.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR with no missing codes; enables 4096 discrete levels for precise analog sensing. |
| Sampling Rate | 1 MSPS maximum throughput; supports real-time monitoring of fast transients in inverters and RRUs. |
| SINAD / SNR | 72.9 dB / 73.1 dB at 5 V AVDD, 2 kHz input; ensures clean digitization of low-amplitude sensor signals. |
| SPI Clock Speed | Up to 60 MHz; allows full throughput with >13.5-MHz SCLK - reducing host controller timing burden. |
| Operating Temp | –40°C to +85°C ambient; qualified for industrial and outdoor power electronics environments. |
| Supply Range | AVDD: 2.35–5.5 V; DVDD: 1.65–5.5 V; supports mixed-voltage system integration without level shifters. |
| Averaging Depth | Programmable 1–128 samples; outputs 16-bit result to improve effective resolution and suppress broadband noise. |
Pinout & Package
TLA2518IRTET is housed in a 16-pin WQFN package (3.00 mm × 3.00 mm) with exposed thermal pad connected to GND for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0/GPIO0 – AIN7/GPIO7 (Pins 1,2,3,4,5,6,15,16) | Configurable I/O channel | Each pin can be set as analog input (default), digital input, or push-pull/open-drain digital output via register control. |
| AVDD (Pin 7) | Analog supply & reference | Provides power and serves as ADC reference voltage; requires 1-µF decoupling to GND for stability. |
| DVDD (Pin 10) | Digital I/O supply | Supplies logic interface; independent from AVDD, enabling flexible voltage domain partitioning. |
| GND (Pin 9) | Common reference | Unified ground for analog and digital sections; thermal pad must be soldered to PCB ground plane. |
| CS (Pin 11) | Chip select | Active-low SPI enable; rising edge triggers conversion start on selected channel in manual mode. |
| SCLK (Pin 13) | SPI clock | Accepts up to 60 MHz; polarity/phase configurable to match host controller SPI mode. |
| SDI (Pin 14) | SPI data in | Receives register writes, opcodes, and configuration commands; setup/hold times defined per 6.6 timing table. |
| SDO (Pin 12) | SPI data out | Outputs 12-bit raw or 16-bit averaged ADC data MSB-aligned; goes Hi-Z when CS is high. |
| DECAP (Pin 8) | Internal LDO decoupling | Requires 0.22–4.7 µF ceramic capacitor to GND for stable internal power regulation. |
Key Features
| Feature | Design Value |
|---|---|
| 8-channel reconfigurable I/O | All eight pins independently assignable as analog input, digital input, or digital output - eliminating external GPIO expanders. |
| On-chip programmable averaging | Reduces host read frequency by up to 128× while delivering 16-bit results - lowering firmware complexity and EMI. |
| Enhanced-SPI interface | Supports full 1-MSPS throughput even with SCLK < 13.5 MHz via internal oversampling coordination. |
| Wide dual-supply operation | AVDD (2.35–5.5 V) and DVDD (1.65–5.5 V) independence allows direct interfacing with 1.8-V, 3.3-V, or 5-V microcontrollers. |
| Integrated offset calibration | CAL bit in GENERAL_CFG enables one-shot software-triggered offset correction - compensating for AVDD/temperature drift. |
Applications
| Macro Remote Radio Unit (RRU) | Battery Management System (BMS) |
|---|---|
|
Use Scenario: Monitoring temperature, current, and voltage across multiple battery cells and power stages in 4G/5G base station RRUs. IC Role / Device Role / Timing Role: 8-channel ADC acquires analog sensor data while GPIOs monitor status flags and control bias circuits. Use Value: Single-chip integration reduces board area and eliminates external mux/GPIO ICs - critical for compact RRU modules. |
Use Scenario: Sampling cell voltages and thermistor readings across 8-series Li-ion strings in EV traction packs. IC Role / Device Role / Timing Role: Configured as 8 analog inputs with 16-sample averaging to reject switching noise from adjacent DC-DC converters. Use Value: 72.9 dB SINAD ensures sub-1-mV measurement accuracy under noisy automotive EMI conditions. |
| String Inverter | Central Inverter |
|
Use Scenario: Measuring PV string voltage, current, and isolation resistance in residential solar string inverters. IC Role / Device Role / Timing Role: Acts as primary analog front-end for MCU-based protection algorithms, with GPIOs driving fault latches. Use Value: Programmable averaging reduces required sampling rate - easing real-time processing load on low-cost MCUs. |
Use Scenario: Monitoring DC-link voltage, grid-phase currents, and heatsink temperatures in multi-kW central inverters. IC Role / Device Role / Timing Role: Provides synchronized 1-MSPS acquisition across 8 channels for harmonic analysis and thermal derating. Use Value: Internal oscillator eliminates need for external clock source - simplifying layout and improving EMC robustness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-channel, 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7142IRUGT | 14-bit resolution, 1-MSPS, 2-channel only; no GPIOs; requires external reference. | Limited to dual-sensor monitoring; lacks I/O expansion capability for control signaling. | Choose when higher resolution is needed for fewer channels and external reference is acceptable. |
| ADS1015IDGSR | 12-bit, 3.3-kSPS max, I²C interface, 4-channel, no GPIOs, internal reference only. | Too slow for real-time inverter control; lacks SPI and GPIO flexibility for embedded timing-critical systems. | Choose only for low-speed, low-pin-count sensor hubs where I²C is preferred and speed is not critical. |
Compared with ADS7142IRUGT and ADS1015IDGSR, the TLA2518IRTET uniquely combines 8-channel configurability, integrated GPIOs, programmable averaging, and 1-MSPS SPI performance - making it the only single-chip solution for compact, noise-resilient power electronics monitoring.
Availability
TLA2518IRTET is available at Aetrix Electronics and suitable for macro remote radio units (RRU), battery management systems (BMS), and solar string inverters requiring stable component supply across extended production lifecycles.
Supply support for TLA2518IRTET 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 industrial-grade IC design.
The TLA2518IRTET belongs to TI's high-density, low-power SAR ADC product line - engineered specifically for space-constrained, noise-sensitive power electronics monitoring in telecom infrastructure and renewable energy systems.
FAQ
What is the maximum SPI clock frequency supported by the TLA2518IRTET?
The TLA2518IRTET supports a maximum SCLK frequency of 60 MHz, as specified in the Switching Characteristics table. This enables high-speed register access and full 1-MSPS throughput when paired with a host controller capable of sustaining >13.5-MHz SCLK - ensuring minimal interface latency in time-critical applications like inverter protection.
Can all eight channels of the TLA2518IRTET be used simultaneously as analog inputs?
Yes, all eight channels (AIN0–AIN7) of the TLA2518IRTET can be configured as analog inputs simultaneously. The device's auto-sequencer supports round-robin acquisition across all enabled channels, and each channel's sampling is managed internally - allowing continuous 1-MSPS aggregate throughput without host intervention between conversions.
Does the TLA2518IRTET require an external reference voltage?
No, the TLA2518IRTET uses AVDD as its internal reference voltage and does not require an external reference. The ADC transfer function is defined as VREF = AVDD, and TI recommends placing a 1-µF ceramic decoupling capacitor between AVDD and GND to maintain reference stability during conversion cycles.
How does the programmable averaging filter in the TLA2518IRTET improve measurement accuracy?
The TLA2518IRTET's programmable averaging filter performs internal oversampling (1–128 samples) and outputs a 16-bit result, effectively increasing resolution and suppressing uncorrelated noise. For example, 16-sample averaging improves SNR by ~12 dB - enabling cleaner readings in electrically noisy environments like solar inverters without increasing host firmware overhead.
What GPIO drive configurations are supported by the TLA2518IRTET?
The TLA2518IRTET supports both open-drain and push-pull digital outputs on all eight GPIO-capable pins (AIN0–AIN7), selectable via the GPO_DRIVE_CFG register. Digital inputs can be read back through the GPI_VALUE register, and outputs can be written via GPO_VALUE - providing full bidirectional I/O control without external components.
TLA2518IRTET 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:
- 12
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 8
- Input Type:
- Pseudo-Differential
- Data Interface:
- SPI
- Configuration:
- MUX-ADC
- Ratio - S/H:ADC:
- 0:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Supply
- Voltage - Supply, Analog:
- 2.35V ~ 5.5V
- Voltage - Supply, Digital:
- 1.65V ~ 5.5V
- Features:
- Internal Oscillator
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-WQFN (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
TLA2518IRTET FAQ
1.How can I place an order for TLA2518IRTET through Aetrix?
Please submit a Request for Quotation (RFQ) for TLA2518IRTET 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 TLA2518IRTET reliable?
The price and inventory of TLA2518IRTET are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLA2518IRTET is usually 5 days.
3.What payment methods are accepted for TLA2518IRTET?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLA2518IRTET transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLA2518IRTET?
TLA2518IRTET orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLA2518IRTET 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 TLA2518IRTET?
For technical support, including TLA2518IRTET datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLA2518IRTET requirements.
6.How does Aetrix verify that TLA2518IRTET is sourced from the original manufacturer or authorized distributors?
All TLA2518IRTET 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 TLA2518IRTET meets industry standards.
7.What is the process for return or replacement of TLA2518IRTET?
All TLA2518IRTET units undergo pre-shipment inspection (PSI). If there is an issue with TLA2518IRTET, 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 TLA2518IRTET part is unused and in its original packaging.
Return procedure for TLA2518IRTET:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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