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Texas Instruments TLC2543IFN
- Part No.:
- TLC2543IFN
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-LCC (J-Lead)
- Datasheet:
-
TLC2543IFN.pdf
- Description:
- IC ADC 12BIT SAR 20PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,465
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Product details
Overview
TLC2543IFN from Texas Instruments is a 12-bit successive-approximation analog-to-digital converter (ADC) with serial 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 sensor data acquisition systems interfacing with microcontrollers via SPI-compatible 3-wire serial protocol.
For engineers reviewing the TLC2543IFN datasheet, TLC2543IFN pinout, TLC2543IFN application, or TLC2543IFN equivalent, this page provides verified technical context, real-world timing behavior, self-test capability details, reference input flexibility (unipolar/bipolar), and validated alternative options for embedded measurement systems requiring stable 12-bit resolution and multi-channel scanning.
Technical Context
The TLC2543IFN implements a switched-capacitor successive-approximation 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 begins only after full I/O cycle completion to minimize digital noise coupling.
It features differential high-impedance reference inputs (REF+, REF–) enabling ratiometric operation, programmable output data length (8/12/16 bits), MSB/LSB-first selection, and power-down mode drawing ≤25 µA. End-of-conversion (EOC) is actively driven low at conversion start and returns high when result is latched and ready for serial readout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = VREF/4096 quantization step for precise voltage measurement |
| Conversion Time | 10 µs - enables ≥100 kSPS throughput per channel in continuous scan mode |
| Analog Inputs | 11 channels (AIN0–AIN10) - supports multi-sensor monitoring without external MUX |
| Linearity Error | ±1 LSB max - ensures monotonic response and <0.025% full-scale deviation |
| Reference Interface | Differential REF+/REF– - allows ratiometric sensing and isolation from supply noise |
| Operating Temperature | –40°C to +85°C - qualified for industrial ambient environments |
| Power-Down Current | ≤25 µA - reduces system power during idle intervals in battery-sensitive designs |
Pinout & Package
Package: 20-pin plastic DIP (FN), through-hole mounting, 0.300-inch wide body, JEDEC MS-001 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN10 | Analog input (11 total) | High-impedance inputs accepting 0–VCC unipolar or ±½VREF bipolar signals; require ≤50 Ω source impedance for 4.1 MHz clock operation |
| CS | Chip select input | Active-low enable: resets internal logic, enables DATA INPUT/I/O CLOCK, and releases DATA OUT from high-Z state |
| DATA INPUT | Serial address/control input | Accepts 8-bit command: 4-bit channel address + 2-bit data length + MSB/LSB + unipolar/bipolar select |
| DATA OUT | 3-state serial data output | Shifts previous conversion result; driven only when CS is low; MSB-first or LSB-first configurable |
| EOC | End-of-conversion indicator | Active-low open-drain output: goes low at conversion start, high when result is latched and ready |
| I/O CLOCK | Serial interface clock | Controls all data transfers; rising edge clocks address bits in, falling edge clocks data bits out |
| REF+ | Positive reference voltage | Accepts VCC (nominally) or external precision reference; sets upper bound of input range |
| REF– | Negative reference voltage | Accepts GND (nominally) or external bias; defines lower bound and enables bipolar operation |
| VCC | Supply voltage | 4.5 V to 5.5 V operation; powers analog and digital sections; decoupling required near pin |
| GND | Analog/digital ground | Common return for all circuitry; requires low-impedance connection to minimize noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 14-channel multiplexer | Selects any of 11 analog inputs or 3 internal self-test voltages-eliminates need for external analog switching |
| Three built-in self-test modes | Verifies ADC functionality using known codes (0, 2048, 4095) without external stimulus-reduces system-level test overhead |
| Programmable output data length | Supports 8-, 12-, or 16-bit transfers-enables bandwidth optimization and compatibility with 8-bit microcontroller peripherals |
| Inherent sample-and-hold function | Automatic acquisition triggered by I/O CLOCK edges-removes need for external S/H circuitry and timing coordination |
| Unipolar or bipolar output operation | Signed binary output referenced to ½VREF-supports both single-ended and differential sensor interfaces |
| CMOS process technology | Ensures low power consumption (2.5 mA typical active current) and TTL/CMOS logic compatibility |
Applications
| Industrial Process Monitoring | Automotive Sensor Interface |
|---|---|
Use Scenario: Continuous voltage monitoring of pressure, temperature, and flow sensors across 8–10 points in PLC-based control cabinets. IC Role / Device Role / Timing Role: 12-bit ADC with 11-channel MUX scans sensors sequentially; EOC signal synchronizes microcontroller readout; 10 µs conversion enables sub-100 µs per-channel cycle time. Use Value: Reduces BOM count by integrating MUX and S/H; ±1 LSB linearity ensures repeatability in closed-loop feedback control. |
Use Scenario: Reading throttle position, coolant temperature, and oxygen sensor outputs in engine control units under under-hood thermal stress. IC Role / Device Role / Timing Role: ADC operating at –40°C to +85°C performs ratiometric conversion using REF+ tied to regulated 5 V; self-test validates integrity before each ignition cycle. Use Value: Differential REF+/REF– rejects supply ripple; programmable power-down cuts quiescent current during vehicle sleep mode. |
| Medical Instrumentation | Energy Metering Front-End |
Use Scenario: Isolated acquisition of biopotential signals (ECG, EMG) using precision op-amp front-end and galvanically isolated digital interface. IC Role / Device Role / Timing Role: Converts conditioned analog signals with 12-bit resolution; unipolar/bipolar mode accommodates AC-coupled amplifier outputs; MSB-first output aligns with common MCU shift-register peripherals. Use Value: Low 2.5 mA supply current extends battery life; 60 pF analog input capacitance simplifies anti-alias filter design. |
Use Scenario: Sampling voltage and current transformer outputs in Class 0.5 electricity meters with metrology-grade accuracy requirements. IC Role / Device Role / Timing Role: ADC digitizes scaled secondary signals; REF+ derived from precision bandgap reference ensures stable full-scale; 11-channel capability supports multi-phase metering. Use Value: ±1 LSB linearity and 10 µs conversion support IEC 62053 compliance; self-test verifies calibration integrity during periodic firmware checks. |
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 interface, no internal MUX, 2.7–5.25 V supply, 2 µs conversion | Lower resolution; suited for cost-sensitive, high-speed applications where 12-bit precision is unnecessary | Choose when speed > resolution and channel count < 4; not suitable for direct replacement due to missing MUX and reduced accuracy |
| MCP3201-I/P | 12-bit resolution, SPI interface, single-ended input only, 2.7–5.5 V supply, 12 µs conversion, no internal MUX or self-test | No multiplexer or self-test; requires external analog switching and validation routines | Prefer for simple single-channel systems; lacks TLC2543IFN's 11-channel scanning and diagnostic capability |
Compared with ADS7822U and MCP3201-I/P, the TLC2543IFN uniquely combines 11-channel multiplexing, built-in self-test, and ±1 LSB linearity in a single DIP package-making it optimal for industrial data loggers and multi-sensor control systems where integration, reliability, and verified accuracy are prioritized over raw speed or lowest cost.
Availability
TLC2543IFN is available at Aetrix Electronics and suitable for industrial process monitoring, automotive sensor interface, medical instrumentation, and energy metering applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLC2543IFN 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 founded in 1930, specializing in analog, embedded processing, and power management ICs with broad industrial, automotive, and communications portfolio coverage.
The TLC2543IFN belongs to TI's legacy precision data acquisition family, designed specifically for microcontroller-based systems needing reliable, multi-channel 12-bit ADC functionality with minimal external components and robust operation across industrial temperature ranges.
FAQ
What is the maximum I/O CLOCK frequency supported by the TLC2543IFN?
The TLC2543IFN supports up to 4.1 MHz I/O CLOCK frequency under recommended operating conditions (VCC = 4.5–5.5 V). At this rate, the minimum I/O CLOCK period is 244 ns, with specified pulse widths (twH/twL ≥ 120 ns) and transition times (≤1 µs). Exceeding 4.1 MHz may cause timing violations and conversion errors, especially at temperature extremes.
Does the TLC2543IFN require an external sample-and-hold circuit?
No, the TLC2543IFN includes an inherent sample-and-hold function that activates automatically during the I/O cycle-specifically beginning on the fourth falling edge of I/O CLOCK and holding until the last falling edge. This eliminates the need for external S/H components and simplifies board layout and timing design in systems using the TLC2543IFN.
How does the TLC2543IFN handle bipolar input signals?
The TLC2543IFN supports bipolar operation via its signed binary output mode, configured using the D0 bit in the 8-bit control word. When enabled, the output code represents values relative to ½VREF, allowing input ranges from –½VREF to +½VREF. The REF– pin must be biased at a stable voltage (e.g., 2.5 V) to establish the midpoint reference for accurate bipolar conversion using the TLC2543IFN.
What self-test voltages are available on the TLC2543IFN?
The TLC2543IFN provides three internal self-test voltages accessible via address codes 1011 (2048 decimal), 1100 (0), and 1101 (4095). These correspond to mid-scale (½VREF), zero-scale (0 V), and full-scale (VREF) references-enabling functional verification of the ADC transfer characteristic without external test equipment or signal sources during system startup or diagnostics using the TLC2543IFN.
Can the TLC2543IFN operate with a 3.3 V supply?
No-the TLC2543IFN is specified only for 4.5 V to 5.5 V supply (VCC) and reference (REF+) operation. Its absolute maximum ratings do not include 3.3 V operation, and electrical characteristics (e.g., VOH/VOL, ICC, timing) are guaranteed only within the 4.5–5.5 V range. Using 3.3 V risks noncompliance with datasheet parameters and unreliable conversion performance for the TLC2543IFN.
TLC2543IFN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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-PLCC (9x9)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
TLC2543IFN FAQ
1.How can I place an order for TLC2543IFN through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC2543IFN 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 TLC2543IFN reliable?
The price and inventory of TLC2543IFN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC2543IFN is usually 5 days.
3.What payment methods are accepted for TLC2543IFN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC2543IFN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC2543IFN?
TLC2543IFN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC2543IFN 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 TLC2543IFN?
For technical support, including TLC2543IFN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC2543IFN requirements.
6.How does Aetrix verify that TLC2543IFN is sourced from the original manufacturer or authorized distributors?
All TLC2543IFN 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 TLC2543IFN meets industry standards.
7.What is the process for return or replacement of TLC2543IFN?
All TLC2543IFN units undergo pre-shipment inspection (PSI). If there is an issue with TLC2543IFN, 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 TLC2543IFN part is unused and in its original packaging.
Return procedure for TLC2543IFN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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