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Texas Instruments TLC2543IDWR
- Part No.:
- TLC2543IDWR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
TLC2543IDWR.pdf
- Description:
- IC ADC 12BIT SAR 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,939
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Product details
Overview
TLC2543IDWR from Texas Instruments is a 12-bit successive-approximation analog-to-digital converter (ADC) with serial control interface, 11-channel analog multiplexer, on-chip sample-and-hold, and 10-µs conversion time over –40°C to +85°C. It features programmable MSB/LSB-first output, unipolar/bipolar operation, and three self-test modes for embedded data acquisition systems.
For engineers reviewing the TLC2543IDWR datasheet, TLC2543IDWR pinout, TLC2543IDWR application, or TLC2543IDWR equivalent, this device supports high-speed serial interfacing with microcontrollers via CS, I/O CLOCK, and DATA INPUT/OUT signals, requires no external clock source due to its on-chip system clock, and delivers ±1 LSB linearity error with ratiometric reference inputs for precision sensor signal conditioning.
Technical Context
The TLC2543IDWR implements a switched-capacitor SAR architecture with an integrated 14-channel analog multiplexer selecting among 11 external inputs or three internal self-test voltages. Its automatic sample-and-hold function initiates sampling on the fourth falling edge of I/O CLOCK and completes acquisition within 4–12 clock periods.
Control is executed via three serial interface lines (CS, I/O CLOCK, DATA INPUT), with 8-bit command words configuring channel address, output length (8/12/16 bits), MSB/LSB order, and unipolar/bipolar mode. Conversion results are shifted out synchronously on DATA OUT, with EOC signaling completion by transitioning low after the final I/O CLOCK falling edge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete digital codes for high-fidelity analog signal digitization. |
| Conversion Time | 10 µs max - enables ≥100 kSPS throughput in continuous acquisition mode. |
| Analog Inputs | 11 channels - supports multi-sensor monitoring without external multiplexer hardware. |
| Linearity Error | ±1 LSB max - ensures monotonic response and <0.025% full-scale deviation across temperature. |
| Reference Inputs | Differential REF+/REF– - enables ratiometric measurement and isolation from supply noise. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and automotive under-hood environments. |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5-V logic and mixed-signal system rails. |
| Max Clock Frequency | 4.1 MHz - allows fast serial transfers while maintaining timing margins for PCB layout. |
Pinout & Package
Package: SOIC-20 (DW package), surface-mount, 0.300-inch body width, tape-and-reel delivery per ordering code TLC2543IDWR.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN10 | Analog input | 11 multiplexed single-ended inputs; ≤50 Ω source impedance required for full 4.1-MHz clock operation. |
| CS (15) | Chip select | Active-low enable: resets counters, enables DATA OUT/DATA INPUT/I/O CLOCK; must meet 1.425 µs setup before first clock. |
| DATA INPUT (17) | Serial command input | Accepts 8-bit address/control word (MSB first) on rising I/O CLOCK edges; defines channel, data length, polarity, and MSB/LSB order. |
| DATA OUT (16) | Serial result output | 3-state output driven only when CS is low; shifts previous conversion result synchronously on falling I/O CLOCK edges. |
| EOC (19) | End-of-conversion flag | Active-low open-drain signal; goes low after last I/O CLOCK falling edge and high when conversion data is latched and ready. |
| I/O CLOCK (18) | Serial interface clock | Bi-directional clock: controls data-in timing, initiates sampling on 4th falling edge, and clocks data-out on falling edges. |
| REF+ (14) / REF– (13) | Differential reference | Voltage reference inputs; define full-scale range (VREF+ – VREF–); support ratiometric scaling and noise rejection. |
| GND (10) / VCC (20) | Power supply | Ground return and 4.5–5.5 V supply; decoupling required near pins to maintain 12-bit accuracy under dynamic load. |
Key Features
| Feature | Design Value |
|---|---|
| Inherent sample-and-hold | Automatic acquisition triggered by I/O CLOCK; eliminates need for external S/H circuitry and reduces BOM count. |
| Programmable output data length | Supports 8-, 12-, or 16-bit transfers - enables bandwidth optimization and MCU firmware flexibility without hardware change. |
| Three built-in self-test modes | Generates known outputs (0, 2048, 4095) via address codes 1100, 1011, 1101 - simplifies production test and field diagnostics. |
| Unipolar or bipolar output operation | Signed binary format referenced to VREF–/2 - supports both ground-referenced and differential sensor interfaces. |
| On-chip system clock | Eliminates external crystal or oscillator - reduces component count, board space, and startup delay in cost-sensitive designs. |
| CMOS process technology | Ensures low power consumption (2.5 mA typical active, 4–25 µA in power-down) and compatibility with 5-V logic families. |
Applications
| Industrial Process Monitoring | Automotive Sensor Interface |
|---|---|
|
Use Scenario: Real-time voltage/current measurement from pressure, temperature, and position sensors in PLC I/O modules. IC Role / Device Role / Timing Role: Primary ADC front-end with 11-channel scan capability and ratiometric reference for immunity to supply drift. Use Value: ±1 LSB linearity and 10-µs conversion enable sub-0.025% accuracy at 100 kSPS - sufficient for Class 0.1 industrial transmitters. |
Use Scenario: Signal conditioning for engine coolant temperature, throttle position, and oxygen sensors in ECU subsystems. IC Role / Device Role / Timing Role: High-reliability ADC operating across –40°C to +85°C with self-test for ASIL-B diagnostic coverage. Use Value: Built-in self-test modes (0/2048/4095 codes) allow automated sensor health verification during startup and runtime. |
| Energy Metering Front-End | Test & Measurement Equipment |
|
Use Scenario: Multi-phase voltage and current sampling in residential/commercial smart meters with anti-tampering detection. IC Role / Device Role / Timing Role: Precision 12-bit digitizer with differential reference inputs to reject common-mode noise from switching power supplies. Use Value: REF+/REF– architecture enables true ratiometric conversion - eliminating gain drift errors caused by reference voltage variation. |
Use Scenario: Modular data acquisition cards for benchtop instruments requiring configurable input channels and fast serial host interface. IC Role / Device Role / Timing Role: Serial ADC with programmable MSB/LSB-first output and flexible data length to match FPGA or ARM Cortex-M SPI peripherals. Use Value: 4.1-MHz max clock and 10-µs conversion support >100 kSPS sustained sampling - suitable for oscilloscope-style waveform capture. |
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, SPI-compatible, 200-kSPS, single-ended inputs only, no internal self-test. | Lower precision; suited for cost-sensitive consumer applications where 12-bit resolution is unnecessary. | Select if 8-bit accuracy suffices and PCB layout must minimize trace count (single-ended REF, no REF–). |
| MCP3201-I/P | 12-bit resolution, SPI interface, 100-kSPS, single analog input, no multiplexer or self-test, 2.7–5.5 V supply. | Fixed single-channel topology; lacks multiplexing and diagnostics - requires external mux for multi-sensor use. | Choose when system uses only one sensor channel and demands wider supply range or lower quiescent current (350 µA). |
Compared with ADS7822U and MCP3201-I/P, the TLC2543IDWR uniquely combines 11-channel multiplexing, on-chip self-test, and differential reference support in a single SOIC-20 package - making it optimal for industrial data loggers and diagnostic-capable sensor hubs where channel density and functional safety matter.
Availability
TLC2543IDWR is available at Aetrix Electronics and suitable for industrial process monitoring, automotive sensor interface, and energy metering applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLC2543IDWR 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, embedded processing, and connectivity technologies with over 50 years of innovation in precision data converters and industrial-grade ICs.
The TLC2543 family was designed specifically for high-reliability serial ADC applications in industrial automation, automotive subsystems, and test equipment - emphasizing robust timing, integrated diagnostics, and wide-temperature operation.
FAQ
What is the operating temperature range of the TLC2543IDWR?
The TLC2543IDWR is characterized for operation from –40°C to +85°C, meeting industrial-grade environmental requirements. This rating is explicitly specified for the "I" grade variant in the datasheet SLAS079F, and the "DWR" suffix confirms the SOIC-20 DW package with industrial temperature qualification. The TLC2543IDWR maintains full 12-bit performance and timing specifications across this entire range.
Does the TLC2543IDWR require an external clock source?
No, the TLC2543IDWR does not require an external clock source. It incorporates an on-chip system clock that drives the internal successive-approximation conversion process. The external I/O CLOCK signal is used solely for serial interface synchronization - controlling data-in timing, initiating sampling, and clocking data-out - but is not the ADC's core conversion clock.
How many analog input channels does the TLC2543IDWR support?
The TLC2543IDWR supports 11 analog input channels (AIN0 through AIN10), managed by an integrated 14-channel analog multiplexer. Three additional multiplexer positions are reserved for internal self-test voltages (0 V, VREF+/2, and VREF+), enabling in-system diagnostics without external stimulus sources.
What self-test functions are available on the TLC2543IDWR?
The TLC2543IDWR provides three built-in self-test modes selectable via specific 4-bit address codes on DATA INPUT: address 1011 outputs code 2048 (mid-scale), 1100 outputs 0 (zero-scale), and 1101 outputs 4095 (full-scale). These deterministic outputs verify ADC functionality, reference integrity, and digital interface operation during power-up or periodic maintenance.
Can the TLC2543IDWR operate with a 3.3-V supply?
No, the TLC2543IDWR is not rated for 3.3-V operation. Its recommended operating supply voltage is 4.5 V to 5.5 V, and absolute maximum VCC is 6.5 V. Operation below 4.5 V may cause timing violations, reduced noise margin, or failure to meet specified linearity and conversion time - as confirmed by the "Recommended Operating Conditions" table in SLAS079F.
TLC2543IDWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- -
TLC2543IDWR FAQ
1.How can I place an order for TLC2543IDWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC2543IDWR 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 TLC2543IDWR reliable?
The price and inventory of TLC2543IDWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC2543IDWR is usually 5 days.
3.What payment methods are accepted for TLC2543IDWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC2543IDWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC2543IDWR?
TLC2543IDWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC2543IDWR 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 TLC2543IDWR?
For technical support, including TLC2543IDWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC2543IDWR requirements.
6.How does Aetrix verify that TLC2543IDWR is sourced from the original manufacturer or authorized distributors?
All TLC2543IDWR 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 TLC2543IDWR meets industry standards.
7.What is the process for return or replacement of TLC2543IDWR?
All TLC2543IDWR units undergo pre-shipment inspection (PSI). If there is an issue with TLC2543IDWR, 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 TLC2543IDWR part is unused and in its original packaging.
Return procedure for TLC2543IDWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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