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Texas Instruments TLC2543CDBR
- Part No.:
- TLC2543CDBR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
TLC2543CDBR.pdf
- Description:
- IC ADC 12BIT SAR 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,810
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Product details
Overview
TLC2543CDBR 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 from 0°C to 70°C - used in industrial sensor data acquisition systems requiring high-resolution, low-latency digitization of multiple analog signals.
For engineers reviewing the TLC2543CDBR datasheet, TLC2543CDBR pinout, TLC2543CDBR application, or TLC2543CDBR equivalent, this page provides verified technical context, real-world timing behavior, confirmed self-test modes, reference input flexibility (unipolar/bipolar), and validated serial protocol configuration options (MSB/LSB first, programmable output length).
Technical Context
The TLC2543CDBR implements a switched-capacitor SAR architecture synchronized to an external I/O CLOCK up to 4.1 MHz, with automatic sample-and-hold triggered on the fourth falling edge of the clock sequence. Its 14-channel internal multiplexer selects among 11 analog inputs or three self-test voltages, and conversion is initiated only after full I/O cycle completion to minimize digital noise coupling.
It features differential high-impedance reference inputs (REF+, REF–) enabling ratiometric measurement and isolation from supply noise, plus an end-of-conversion (EOC) signal that transitions low at conversion start and high upon result latching - supporting precise host synchronization without polling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for high-fidelity analog signal digitization. |
| Conversion Time | 10 µs max - enables ≥100 kSPS throughput when using 4.1-MHz I/O CLOCK. |
| Linearity Error | ±1 LSB max - ensures monotonicity and minimal transfer-curve deviation across full scale. |
| Analog Inputs | 11 channels (AIN0–AIN10) - supports multi-sensor monitoring without external MUX. |
| Reference Interface | Differential REF+/REF– - allows ratiometric operation and flexible voltage scaling (2.5 V to VCC+0.1 V range). |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade embedded control and instrumentation. |
| Power-Down Current | 4 µA min / 25 µA max - enables ultra-low-power sleep mode between conversions. |
Pinout & Package
Package: 20-pin SOIC (DB) - surface-mount, 0.300-inch body width, RoHS-compliant, tape-and-reel delivery (TLC2543CDBR).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN10 | Analog input | 11 multiplexed single-ended inputs; source impedance ≤50 Ω required for full-speed operation. |
| CS (Pin 15) | Chip select | Active-low enable; resets internal logic and activates DATA OUT/DATA INPUT/I/O CLOCK on falling edge. |
| DATA INPUT (Pin 17) | Serial address/control input | Accepts 8-bit command: 4-bit channel address + 2-bit data length + MSB/LSB + unipolar/bipolar bit. |
| DATA OUT (Pin 16) | Serial conversion result output | 3-state, MSB-first or LSB-first; driven only when CS is low; synchronized to I/O CLOCK falling edges. |
| I/O CLOCK (Pin 18) | Serial interface clock | Controls address loading, sampling trigger (4th falling edge), data shifting, and conversion initiation (last falling edge). |
| EOC (Pin 19) | End-of-conversion indicator | Active-low open-drain signal; goes low at conversion start, high when result is latched and ready for readout. |
| REF+ (Pin 14), REF– (Pin 13) | Differential reference inputs | Set full-scale range; support unipolar (0 to Vref+) or bipolar (–Vref– to +Vref+) output coding relative to Vref–. |
| VCC (Pin 20), GND (Pin 10) | Power supply | 4.5 V to 5.5 V operation; decoupling required per Figure 1 (10 µF + 0.1 µF near pins). |
Key Features
| Feature | Design Value |
|---|---|
| Programmable output data length | Supports 8-, 12-, or 16-bit transfers - reduces bus overhead in microcontroller systems with limited I/O bandwidth. |
| Three built-in self-test modes | Validates ADC functionality via known codes (0, 2048, 4095) using address inputs 1100b, 1011b, 1101b - eliminates need for external test fixtures. |
| Inherent sample-and-hold | Automatic acquisition triggered by I/O CLOCK - removes requirement for external S/H circuitry and simplifies PCB layout. |
| Unipolar or bipolar output operation | Signed binary output referenced to Vref–/2 - enables direct digitization of AC-coupled or offset analog signals without software sign extension. |
| CMOS process technology | Ensures low power consumption (2.5 mA typical ICC), high noise immunity, and compatibility with 5-V logic families. |
Applications
| Industrial Sensor Monitoring | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Continuous logging of temperature, pressure, and humidity sensors across 11 channels in PLC-based factory controllers. IC Role / Device Role / Timing Role: Primary ADC managing multi-point analog acquisition with deterministic 10 µs conversion latency and EOC-driven interrupt signaling. Use Value: Eliminates external multiplexer and timing logic; 12-bit resolution captures sub-0.1% sensor drift for predictive maintenance analytics. |
Use Scenario: High-speed parametric testing of semiconductor devices using calibrated reference voltages and precision analog stimulus. IC Role / Device Role / Timing Role: Digitizer for feedback loops in closed-loop bias control, synchronized to system clock via I/O CLOCK and EOC handshake. Use Value: Self-test modes verify calibration integrity before each test sequence; differential REF inputs reject common-mode noise from switching power supplies. |
| Energy Metering Front-End | Medical Instrumentation Signal Chain |
Use Scenario: Isolated current/voltage sensing in DIN-rail energy meters with anti-tampering diagnostics. IC Role / Device Role / Timing Role: Isolated-side ADC interfacing to shunt/CT sensors, using REF– as virtual ground to support bidirectional current measurement. Use Value: Bipolar output mode directly encodes direction and magnitude; ±1 LSB linearity meets IEC 62053-21 Class 0.5 accuracy requirements. |
Use Scenario: Patient vital sign acquisition (ECG, respiration, SpO₂) in portable diagnostic devices with strict power budget constraints. IC Role / Device Role / Timing Role: Low-power ADC operating in burst mode - active only during measurement windows, entering 4 µA power-down between samples. Use Value: Programmable data length (8-bit for trend monitoring, 12-bit for diagnostic detail) optimizes MCU memory and wireless transmission efficiency. |
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, no internal MUX, 2.7-V to 5.25-V supply - lacks self-test and bipolar mode. | Better suited for low-cost, low-power battery-operated systems where 12-bit resolution is unnecessary. | Select if 8-bit accuracy suffices and board space limits use of external MUX; not drop-in compatible due to pin count and feature set mismatch. |
| MCP3208-I/P | 12-bit, SPI interface, 8-channel MUX, 2.7-V to 5.5-V, no EOC pin - uses BUSY flag instead; no self-test modes. | Preferred in PIC-based designs with native SPI peripherals; requires polling or GPIO-based busy detection. | Choose when leveraging Microchip's ecosystem and accepting software-managed timing; differs in pinout, control protocol, and missing EOC hardware handshake. |
Compared with TLC2543CDBR, ADS7822U trades resolution and integrated diagnostics for lower power and cost, while MCP3208-I/P offers comparable resolution but omits EOC signaling and self-test - making TLC2543CDBR uniquely suitable for noise-sensitive, high-integrity industrial data acquisition requiring hardware-synchronized conversion and built-in validation.
Availability
TLC2543CDBR is available at Aetrix Electronics and suitable for industrial sensor monitoring, automated test equipment, energy metering front-ends, and medical instrumentation signal chains requiring stable component supply and long-term production continuity.
Supply support for TLC2543CDBR 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 TLC2543CDBR belongs to TI's legacy precision ADC product line, engineered specifically for high-reliability, multi-channel analog digitization in commercial-temperature industrial control and instrumentation systems.
FAQ
What is the maximum I/O CLOCK frequency supported by the TLC2543CDBR?
The TLC2543CDBR supports an I/O CLOCK frequency up to 4.1 MHz under recommended operating conditions (VCC = 4.5 V to 5.5 V). At this rate, the device achieves its specified 10 µs conversion time and maintains ±1 LSB linearity. Operation above 4.1 MHz may degrade accuracy or cause timing violations, as confirmed in the SLAS079F datasheet absolute maximum and recommended operating conditions tables.
Does the TLC2543CDBR require an external sample-and-hold circuit?
No, the TLC2543CDBR includes an inherent sample-and-hold function activated automatically during the I/O cycle - sampling begins on the fourth falling edge of I/O CLOCK and holds until the last falling edge. This eliminates the need for external S/H components, reducing BOM cost and board area while ensuring precise aperture timing aligned to the serial interface clock.
How does the TLC2543CDBR handle bipolar analog input signals?
The TLC2543CDBR supports bipolar operation via its unipolar/bipolar output select bit (D0) in the 8-bit control word. When enabled, it outputs signed binary code referenced to Vref–/2 - allowing direct digitization of signals ranging from –Vref– to +Vref+. For example, with REF+ = 5 V and REF– = 0 V, a ±2.5 V input maps to full 12-bit range (0x000 to 0xFFF), with 0x800 representing 0 V.
What self-test voltages are available on the TLC2543CDBR and how are they selected?
The TLC2543CDBR provides three internal self-test voltages: 0 V (code 0x000), Vref+/2 (code 0x800), and Vref+ (code 0xFFF). They are selected by writing specific 4-bit addresses to the DATA INPUT pin: 1100b for 0 V, 1011b for Vref+/2, and 1101b for Vref+. These modes validate ADC functionality without external stimuli, as documented in Table 3 and Figure 2 of the SLAS079F datasheet.
Can the TLC2543CDBR operate with a 3.3-V microcontroller interface?
The TLC2543CDBR is specified for VCC = 4.5 V to 5.5 V and requires TTL/CMOS-level inputs (VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 4.5 V–5.5 V). While 3.3-V logic may meet voltage thresholds, it violates the absolute maximum rating for input voltage (VI ≤ VCC + 0.3 V) and risks unreliable operation. A level-shifter or 5-V IO domain is required for robust interfacing - confirmed by TI's recommended operating conditions and absolute maximum ratings tables.
TLC2543CDBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SSOP (0.209", 5.30mm 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 20-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
TLC2543CDBR FAQ
1.How can I place an order for TLC2543CDBR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC2543CDBR 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 TLC2543CDBR reliable?
The price and inventory of TLC2543CDBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC2543CDBR is usually 5 days.
3.What payment methods are accepted for TLC2543CDBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC2543CDBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC2543CDBR?
TLC2543CDBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC2543CDBR 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 TLC2543CDBR?
For technical support, including TLC2543CDBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC2543CDBR requirements.
6.How does Aetrix verify that TLC2543CDBR is sourced from the original manufacturer or authorized distributors?
All TLC2543CDBR 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 TLC2543CDBR meets industry standards.
7.What is the process for return or replacement of TLC2543CDBR?
All TLC2543CDBR units undergo pre-shipment inspection (PSI). If there is an issue with TLC2543CDBR, 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 TLC2543CDBR part is unused and in its original packaging.
Return procedure for TLC2543CDBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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