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Texas Instruments TLC2543IDBRG4HE
- Part No.:
- TLC2543IDBRG4HE
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- -
- Datasheet:
-
TLC2543IDBRG4HE.pdf
- Description:
- 12 BIT A/D CONVERTER
- Quantity:
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Inventory:58,008
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Product details
Overview
TLC2543IDBRG4HE 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 supports unipolar/bipolar output modes across –40°C to 85°C. Used in industrial data acquisition systems interfacing microcontrollers via SPI-compatible 3-wire serial protocol.
For engineers reviewing the TLC2543IDBRG4HE datasheet, TLC2543IDBRG4HE pinout, TLC2543IDBRG4HE application, or TLC2543IDBRG4HE equivalent, key selection factors include guaranteed 12-bit resolution over temperature, programmable data length (8/12/16 bits), built-in self-test modes, differential reference inputs for ratiometric accuracy, and low-power shutdown capability.
Technical Context
The TLC2543IDBRG4HE 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 results are shifted out serially on DATA OUT with MSB-first or LSB-first ordering.
Control logic accepts an 8-bit input stream comprising 4-bit channel address, 2-bit data length select, 1-bit MSB/LSB order flag, and 1-bit unipolar/bipolar mode bit. End-of-conversion (EOC) asserts low after the final I/O CLOCK falling edge and remains low until conversion completes and data is latched - enabling precise timing coordination with host processors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR - delivers 1 LSB = VREF/4096 quantization step for high-precision measurement. |
| Conversion Time | 10 µs max - enables ≥100 kSPS throughput when using 4.1 MHz I/O CLOCK and 12-bit output mode. |
| Linearity Error | ±1 LSB max - ensures monotonicity and minimal integral nonlinearity across full scale and temperature range. |
| Analog Inputs | 11 single-ended channels - supports multiplexed sensor monitoring without external MUX hardware. |
| Reference Interface | Differential REF+/REF– - allows ratiometric operation, isolation from supply noise, and flexible scaling (2.5 V to VCC+0.1 V). |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments where ambient thermal stress impacts ADC stability. |
| Power-Down Current | 4 µA min / 25 µA max - reduces system power during idle periods while retaining configuration state. |
Pinout & Package
Package: 20-pin SOIC (DB) - 7.5 mm × 12.8 mm body, 1.27 mm pitch, surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN10 | Analog input (11 channels) | Accepts single-ended signals ≤ VREF+; source impedance ≤50 Ω required for full-speed 4.1 MHz operation. |
| CS (Pin 15) | Chip select input | Active-low enable: resets counters on high→low transition; disables DATA INPUT/I/O CLOCK on low→high. |
| DATA INPUT (Pin 17) | Serial control input | Receives 8-bit command: 4-bit channel address + 2-bit data length + 1-bit MSB/LSB + 1-bit unipolar/bipolar. |
| DATA OUT (Pin 16) | Serial data output | 3-state output driven only when CS is low; shifts previous conversion result synchronously with I/O CLOCK falling edges. |
| I/O CLOCK (Pin 18) | Serial interface clock | Controls all data transfers; rising edge clocks in address/control bits; falling edge clocks out conversion data and triggers sampling. |
| EOC (Pin 19) | End-of-conversion indicator | Active-low open-drain output goes low after last I/O CLOCK falling edge and returns high when conversion completes and data is ready. |
| REF+ (Pin 14), REF– (Pin 13) | Differential reference inputs | Define full-scale range: VIN ∈ [VREF–, VREF+]; supports ratiometric sensing and noise rejection via separate analog ground path. |
| VCC (Pin 20), GND (Pin 10) | Power supply | Operates from 4.5 V to 5.5 V; requires local 0.1 µF ceramic + 10 µF tantalum decoupling per datasheet Figure 1. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable output data length | 8-, 12-, or 16-bit mode - optimizes SPI bus bandwidth and host processing load without sacrificing resolution. |
| Built-in self-test modes | Three internal test voltages (0 V, mid-scale, full-scale) accessible via address codes 1100b, 1011b, 1101b - enables runtime calibration verification. |
| Inherent sample-and-hold | Automatic acquisition on fourth I/O CLOCK falling edge - eliminates need for external S/H circuitry and associated layout complexity. |
| Unipolar/bipolar output operation | Signed binary format referenced to VREF+/2 - supports AC-coupled sensor interfaces and bipolar transducer outputs directly. |
| CMOS process technology | Low power consumption (2.5 mA typical ICC) and high noise immunity - suitable for mixed-signal embedded systems with tight thermal budgets. |
Applications
| Industrial Process Monitoring | Automotive Sensor Interface |
|---|---|
|
Use Scenario: Continuous voltage/current measurement from pressure, temperature, and flow sensors in PLC I/O modules. IC Role / Device Role / Timing Role: Primary ADC front-end with multiplexed analog inputs and serial output to ARM Cortex-M host MCU. Use Value: 11 integrated channels reduce BOM count vs discrete MUX+ADC solutions; ±1 LSB linearity ensures repeatability in closed-loop control feedback paths. |
Use Scenario: Reading analog outputs from oxygen, throttle position, and coolant temperature sensors in engine control units. IC Role / Device Role / Timing Role: Ratiometric ADC converting sensor signals referenced to regulated 5 V supply, synchronized to ECU timing via EOC handshake. Use Value: Differential REF+/REF– inputs reject common-mode noise from ignition systems; –40°C to +85°C rating matches under-hood operating envelope. |
| Test & Measurement Equipment | Energy Metering Front-End |
|
Use Scenario: Multi-channel data loggers capturing sensor waveforms for lab-grade analysis and calibration traceability. IC Role / Device Role / Timing Role: High-speed 12-bit digitizer with programmable data length and self-test for periodic accuracy validation. Use Value: 10 µs conversion time supports ≥100 kSPS sampling; built-in self-test eliminates need for external calibration references during field service. |
Use Scenario: Sampling voltage and current transformers in Class 0.5 smart electricity meters compliant with IEC 62053-21. IC Role / Device Role / Timing Role: Precision ADC providing isolated analog inputs to metrology SoC, with REF– tied to isolated analog ground. Use Value: Differential reference architecture enables accurate ratiometric conversion despite supply ripple; low offset/gain errors minimize metering bias. |
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 interface, no internal MUX or self-test. | Lower precision; suited for cost-sensitive, high-speed applications where 12-bit resolution is unnecessary. | Select when speed >100 kSPS is critical and resolution ≤8 bits suffices; not drop-in due to pinout and feature mismatch. |
| MCP3201-I/P | 12-bit resolution, SPI interface, single-ended input only, no MUX, no self-test, 10 µs conversion. | Limited to one analog channel; lacks multiplexing and diagnostic features required for multi-sensor systems. | Choose for simple single-channel designs where board space and BOM simplicity outweigh channel count needs. |
Compared with ADS7822U and MCP3201-I/P, the TLC2543IDBRG4HE uniquely combines 11-channel multiplexing, built-in self-test, and programmable data length in a single SOIC package - making it optimal for industrial data acquisition where channel density, diagnostics, and configurability are design priorities.
Availability
TLC2543IDBRG4HE is available at Aetrix Electronics and suitable for industrial process monitoring, automotive sensor interface, and test equipment requiring stable component supply and long-term production continuity.
Supply support for TLC2543IDBRG4HE 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 decades of experience in precision data converters and industrial-grade ICs.
The TLC2543 family was designed specifically for microcontroller-based data acquisition systems needing reliable, low-cost, multi-channel 12-bit conversion with minimal external components and robust serial control.
FAQ
What is the maximum I/O CLOCK frequency supported by the TLC2543IDBRG4HE?
The TLC2543IDBRG4HE supports up to 4.1 MHz I/O CLOCK frequency under recommended operating conditions (VCC = 4.5 V to 5.5 V). This enables minimum conversion cycle times and supports high-throughput data acquisition. Operation above this frequency may cause timing violations or reduced accuracy, as confirmed in the SLAS079F datasheet Section "Recommended Operating Conditions".
Does the TLC2543IDBRG4HE require an external sample-and-hold circuit?
No, the TLC2543IDBRG4HE includes an inherent sample-and-hold function that activates automatically on the fourth falling edge of the I/O CLOCK signal. This eliminates the need for external S/H components, simplifying PCB layout and reducing system cost - a confirmed feature documented in the device description and functional block diagram of the SLAS079F datasheet.
How does the TLC2543IDBRG4HE handle bipolar input signals?
The TLC2543IDBRG4HE supports bipolar operation via its signed binary output mode, where the digital code is referenced to VREF+/2. When the unipolar/bipolar control bit (D0) is set to '1', inputs below REF– convert to 0x000 and inputs above REF+ convert to 0xFFF, with mid-scale (0x7FF) representing VREF+/2 - as specified in the "Description" and "PRINCIPLES OF OPERATION" sections of SLAS079F.
What self-test voltages are available on the TLC2543IDBRG4HE?
The TLC2543IDBRG4HE provides three internal self-test voltages: 0 V (address 1100b), mid-scale (~VREF+/2, address 1011b), and full-scale (VREF+, address 1101b). These are routed to the ADC input multiplexer internally, enabling firmware-based calibration verification without external stimulus - explicitly defined in Table 3 and "PRINCIPLES OF OPERATION" of SLAS079F.
Is the TLC2543IDBRG4HE pin-compatible with other variants in the TLC2543 family?
Yes, the TLC2543IDBRG4HE shares identical pinout and electrical interface with all TLC2543x DB-package variants (e.g., TLC2543CDB, TLC2543IDB, TLC2543MDB), including identical 20-pin SOIC footprint, terminal functions, and timing behavior. Only temperature grade and screening differ - confirmed in the "AVAILABLE OPTIONS" table and "Terminal Functions" section of SLAS079F.
TLC2543IDBRG4HE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- -
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- -
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- -
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -
- Supplier Device Package:
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- Mounting Type:
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TLC2543IDBRG4HE FAQ
1.How can I place an order for TLC2543IDBRG4HE through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC2543IDBRG4HE 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 TLC2543IDBRG4HE reliable?
The price and inventory of TLC2543IDBRG4HE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC2543IDBRG4HE is usually 5 days.
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Once your TLC2543IDBRG4HE 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 TLC2543IDBRG4HE?
For technical support, including TLC2543IDBRG4HE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC2543IDBRG4HE requirements.
6.How does Aetrix verify that TLC2543IDBRG4HE is sourced from the original manufacturer or authorized distributors?
All TLC2543IDBRG4HE 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 TLC2543IDBRG4HE meets industry standards.
7.What is the process for return or replacement of TLC2543IDBRG4HE?
All TLC2543IDBRG4HE units undergo pre-shipment inspection (PSI). If there is an issue with TLC2543IDBRG4HE, 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 TLC2543IDBRG4HE part is unused and in its original packaging.
Return procedure for TLC2543IDBRG4HE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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