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Texas Instruments TLC2543IDW
- Part No.:
- TLC2543IDW
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
TLC2543IDW.pdf
- Description:
- IC ADC 12BIT SAR 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,854
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Product details
Overview
TLC2543IDW from Texas Instruments is a 12-bit successive-approximation analog-to-digital converter (ADC) with serial control interface, 11-channel analog multiplexer, and on-chip sample-and-hold. It delivers 10 µs conversion time, ±1 LSB linearity error, and operates across –40°C to 85°C. Used in industrial data acquisition systems where precise multi-channel voltage monitoring is required.
For engineers reviewing the TLC2543IDW datasheet, TLC2543IDW pinout, TLC2543IDW application, or TLC2543IDW equivalent, key selection factors include its 11 analog inputs, programmable MSB/LSB-first output, unipolar/bipolar operation mode, and compatibility with microcontroller SPI-like serial ports via CS/I/O CLOCK/DATA INPUT/DATA OUT signals.
Technical Context
The TLC2543IDW implements a switched-capacitor successive-approximation architecture with an integrated 14-channel analog multiplexer (11 external + 3 internal self-test). Its conversion cycle is triggered after the I/O clock sequence completes, isolating analog accuracy from digital noise.
It features differential high-impedance reference inputs (REF+/REF–), enabling ratiometric measurement and supply-noise rejection. The device supports three programmable output data lengths (8-, 12-, or 16-bit transfers) and includes built-in self-test modes for production verification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for high-fidelity voltage digitization. |
| Conversion Time | 10 µs - enables up to 100 kSPS sampling rate in continuous operation. |
| Linearity Error | ±1 LSB max - ensures monotonicity and minimal code-width deviation across full scale. |
| Analog Inputs | 11 channels - supports multiplexed sensing of multiple sensors or system nodes without external MUX. |
| Reference Interface | Differential REF+/REF– - allows ratiometric scaling and isolation from logic supply noise. |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including factory automation and motor control. |
| I/O Clock Frequency | Up to 4.1 MHz - compatible with standard microcontroller GPIO bit-banging or hardware SPI peripherals. |
Pinout & Package
TL2543IDW uses a 20-pin SOIC (DW) package with 0.300-inch body width and standard JEDEC MS-013AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN10 | Analog input | 11 multiplexed single-ended inputs; ≤50 Ω source impedance required for full-speed operation. |
| CS | Chip select | Active-low enable; resets internal logic and activates DATA OUT/DATA INPUT/I/O CLOCK on falling edge. |
| DATA INPUT | Serial address/control input | Accepts 4-bit channel address + 2-bit data length + MSB/LSB + unipolar/bipolar config on rising I/O CLOCK edges. |
| DATA OUT | Serial conversion result output | 3-state output; shifts previous conversion result synchronously with I/O CLOCK falling edges. |
| EOC | End-of-conversion indicator | Active-low open-drain signal; goes low at start of conversion, high when result is latched and ready. |
| I/O CLOCK | Serial interface clock | Controls both input address latching and output data shifting; defines I/O cycle length (8/12/16 clocks). |
| REF+, REF– | Differential reference inputs | Set full-scale range; VREF = REF+ − REF–; supports ratiometric configurations with sensor bridges. |
| VCC, GND | Power supply | 4.5 V to 5.5 V operation; GND serves as analog/digital reference return for all internal circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Inherent sample-and-hold | Automatic acquisition during I/O cycle; eliminates need for external S/H circuitry in most applications. |
| Programmable output data length | Selects 8-, 12-, or 16-bit transfer - reduces bus overhead when lower resolution suffices or adds padding for alignment. |
| Built-in self-test modes | Three internal test voltages (0 V, mid-scale, full-scale) accessible via address bits - enables automated calibration and fault detection. |
| Programmable power-down | Reduces ICC to ≤25 µA - extends battery life in portable instrumentation or enables sleep-mode wake-on-event designs. |
| Unipolar/bipolar output format | Signed binary (with respect to VREF/2) or offset binary - simplifies interfacing with bipolar transducers like accelerometers or current-sense amps. |
Applications
| Industrial Process Monitoring | Motor Control Feedback |
|---|---|
|
Use Scenario: Continuous voltage monitoring of temperature, pressure, and flow sensors across PLC I/O modules. IC Role / Device Role / Timing Role: Primary ADC managing 11 sensor channels with daisy-chained microcontroller communication. Use Value: Eliminates external multiplexer and timing-critical sample synchronization, reducing BOM count and PCB area. |
Use Scenario: Acquisition of phase currents and DC bus voltage in 3-phase inverter drives. IC Role / Device Role / Timing Role: High-speed analog front-end delivering synchronized samples to PWM controller for closed-loop torque regulation. Use Value: 10 µs conversion time enables >10 kHz current loop update rates while maintaining 12-bit precision. |
| Automated Test Equipment (ATE) | Energy Metering Subsystem |
|
Use Scenario: Multi-point voltage validation during functional testing of power supplies and board-level assemblies. IC Role / Device Role / Timing Role: Precision measurement engine with built-in self-test for traceable calibration verification. Use Value: On-chip self-test modes (0 V, mid-scale, full-scale) replace external reference sources during production test. |
Use Scenario: Sensing of shunt-based current and transformer-coupled voltage inputs in Class 0.5 smart meters. IC Role / Device Role / Timing Role: Isolated analog acquisition node interfaced via optocoupled serial link to metrology MCU. Use Value: Differential REF+/REF– inputs support ratiometric scaling against stable voltage references, improving long-term accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-bit resolution, 2.5 µs conversion, SPI-compatible, no internal MUX | Lower resolution and fewer channels; suited for cost-sensitive, high-speed single-input applications | Choose ADS7822U only if 8-bit resolution and single-channel operation meet system requirements. |
| MCP3201-I/P | 12-bit, SPI interface, single-ended input only, no internal MUX or self-test | Lacks multiplexer and diagnostic features; requires external signal routing and calibration infrastructure | Prefer MCP3201-I/P only when board space is constrained and channel count is fixed at one. |
Compared with ADS7822U and MCP3201-I/P, the TLC2543IDW uniquely integrates 11-channel multiplexing, self-test capability, and programmable data formatting-making it optimal for industrial systems requiring flexible, verified multi-sensor digitization without added components.
Availability
TLC2543IDW is available at Aetrix Electronics and suitable for industrial process monitoring, motor control feedback, and automated test equipment requiring stable component supply over extended product lifecycles.
Supply support for TLC2543IDW 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 heritage in precision data converters and industrial-grade ICs.
The TLC2543 family was designed specifically for microcontroller-based industrial data acquisition systems requiring reliable, multi-channel analog digitization with minimal external components and robust noise immunity.
FAQ
What is the operating temperature range of the TLC2543IDW?
The TLC2543IDW is rated for operation from –40°C to +85°C, making it suitable for industrial environments such as factory automation, motor drives, and outdoor instrumentation where ambient conditions exceed commercial-grade limits. This rating is explicitly specified in the device's characterization and validated across production lots per TI's SLAS079F datasheet.
Does the TLC2543IDW require an external sample-and-hold circuit?
No, the TLC2543IDW includes an inherent sample-and-hold function that automatically acquires the selected analog input during the I/O clock sequence. Sampling begins on the fourth falling edge of I/O CLOCK and holds until the last falling edge - eliminating the need for external S/H components and simplifying system design.
How many analog input channels does the TLC2543IDW support?
The TLC2543IDW supports 11 analog input channels (AIN0 through AIN10), managed by an integrated 14-channel analog multiplexer (11 external + 3 internal self-test). This allows sequential digitization of multiple sensors or system nodes using a single serial interface, reducing interconnect complexity.
Can the TLC2543IDW interface directly with standard microcontroller SPI peripherals?
The TLC2543IDW uses a 4-wire serial protocol (CS, I/O CLOCK, DATA INPUT, DATA OUT) compatible with SPI hardware in master mode, though it is not a true SPI-compliant device. It requires software-controlled clock polarity and phase handling due to its non-standard frame structure and EOC-driven timing - confirmed in TI's SLAA012 application report.
What reference configuration options does the TLC2543IDW support?
The TLC2543IDW supports differential reference inputs (REF+ and REF–), enabling unipolar or bipolar output operation relative to VREF/2. It accepts VREF = REF+ − REF– from 2.5 V to VCC, supporting ratiometric measurements with bridge sensors or isolated references - a key feature documented in the "Electrical Characteristics" section of SLAS079F.
TLC2543IDW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 66k
- Number of Inputs:
- 11
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 20-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
TLC2543IDW FAQ
1.How can I place an order for TLC2543IDW through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC2543IDW 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 TLC2543IDW reliable?
The price and inventory of TLC2543IDW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC2543IDW is usually 5 days.
3.What payment methods are accepted for TLC2543IDW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC2543IDW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC2543IDW?
TLC2543IDW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC2543IDW 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 TLC2543IDW?
For technical support, including TLC2543IDW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC2543IDW requirements.
6.How does Aetrix verify that TLC2543IDW is sourced from the original manufacturer or authorized distributors?
All TLC2543IDW 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 TLC2543IDW meets industry standards.
7.What is the process for return or replacement of TLC2543IDW?
All TLC2543IDW units undergo pre-shipment inspection (PSI). If there is an issue with TLC2543IDW, 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 TLC2543IDW part is unused and in its original packaging.
Return procedure for TLC2543IDW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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