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Texas Instruments TLC2543IDB
- Part No.:
- TLC2543IDB
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
TLC2543IDB.pdf
- Description:
- IC ADC 12BIT SAR 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,823
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Product details
Overview
TLC2543IDB 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 ±1 LSB linearity error, 10 µs conversion time at 4.1 MHz I/O clock, and operates across –40°C to 85°C. It is used in industrial data acquisition systems requiring high-resolution, multi-channel voltage monitoring with ratiometric reference support.
For engineers reviewing the TLC2543IDB datasheet, TLC2543IDB pinout, TLC2543IDB application, or TLC2543IDB equivalent, key selection factors include its 11 analog inputs, programmable MSB/LSB-first output, unipolar/bipolar operation mode, self-test capability, and DB-package compatibility with PCB layouts for legacy TI serial ADCs.
Technical Context
The TLC2543IDB implements a switched-capacitor SAR architecture with an integrated 14-channel analog multiplexer (11 external + 3 internal self-test voltages), automatic sample-and-hold, and differential high-impedance reference inputs (REF+, REF–). Its serial interface uses three control lines - CS, I/O CLOCK, and DATA INPUT - to configure channel selection, data length (8/12/16 bits), output polarity, and MSB/LSB order.
Conversion timing is tightly coupled to the I/O CLOCK: sampling begins on the fourth falling edge, conversion starts after the final falling edge, and EOC goes low to signal initiation and high upon completion. The device supports programmable power-down mode drawing only 4–25 µA, and features end-of-conversion (EOC) flagging and 3-state DATA OUT for daisy-chaining.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR - delivers 1 LSB = VREF/4096 quantization step for precise voltage measurement. |
| Conversion Time | 10 µs max at 4.1 MHz I/O clock - enables ≥100 kSPS throughput in continuous acquisition. |
| Linearity Error | ±1 LSB max - ensures monotonicity and minimal code-width deviation across full scale. |
| Analog Inputs | 11 single-ended channels (AIN0–AIN10) - supports multi-sensor monitoring without external MUX. |
| Reference Interface | Differential REF+/REF– inputs - enables ratiometric measurement and isolation from supply noise. |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including factory automation and motor control. |
| Power-Down Current | 4–25 µA - reduces system-level standby power in battery-backed or energy-conscious designs. |
Pinout & Package
Package: 20-pin SOIC (DB package), 7.5 mm × 12.8 mm body, 1.27 mm pitch, RoHS-compliant plastic body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN10 | Analog input (11 channels) | Accepts single-ended signals ≤ VCC; requires ≤50 Ω source impedance for full-speed operation. |
| CS (Pin 15) | Chip select input | Active-low enable: resets counters, enables DATA OUT/DATA INPUT/I/O CLOCK on falling edge. |
| DATA INPUT (Pin 17) | Serial address/control input | Receives 4-bit channel address + 4-bit control word (data length, MSB/LSB, unipolar/bipolar). |
| DATA OUT (Pin 16) | Serial conversion result output | 3-state, MSB/LSB-first configurable; outputs previous conversion result during current I/O cycle. |
| EOC (Pin 19) | End-of-conversion flag | Active-low open-drain output; transitions low at conversion start, high when result is latched and ready. |
| I/O CLOCK (Pin 18) | Serial interface clock | Drives both input shift-in and output shift-out; controls sampling onset (4th falling edge) and conversion trigger (final falling edge). |
| REF+ (Pin 14), REF– (Pin 13) | Differential reference inputs | Set full-scale range; VREF = VREF+ – VREF–; supports ratiometric scaling with sensor bridges. |
| VCC (Pin 20), GND (Pin 10) | Power supply | 4.5–5.5 V operation; GND serves as analog/digital common reference for all measurements. |
Key Features
| Feature | Design Value |
|---|---|
| 11-channel analog multiplexer | Reduces external component count by integrating selection logic for multi-sensor systems. |
| Three built-in self-test modes | Enables in-system verification using internal reference voltages (0 V, VREF/2, VREF) without external stimuli. |
| Programmable output data length | Supports 8-, 12-, or 16-bit transfers - optimizes SPI bus bandwidth and microcontroller processing load. |
| Inherent sample-and-hold function | Eliminates need for external S/H circuitry; holds input during conversion for accurate snapshot capture. |
| Unipolar or bipolar output operation | Configurable signed binary output relative to VREF/2 - supports AC-coupled or offset-voltage measurements. |
Applications
| Industrial Process Monitoring | Motor Control Feedback |
|---|---|
|
Use Scenario: Continuous voltage/current sensing across multiple temperature, pressure, and flow sensors in PLC-based control cabinets. IC Role / Device Role / Timing Role: Central 12-bit ADC managing 11 analog inputs via serial interface; synchronized to host MCU's SPI engine with EOC-driven interrupt polling. Use Value: ±1 LSB linearity and ratiometric REF+/REF– inputs ensure stable readings despite supply drift in harsh electrical environments. |
Use Scenario: Real-time acquisition of phase currents, DC bus voltage, and thermistor readings in 3-phase inverter drives. IC Role / Device Role / Timing Role: High-speed serial ADC providing sampled data to DSP/FPGA for field-oriented control (FOC) loop execution. Use Value: 10 µs conversion time enables ≥100 kSPS sampling - sufficient for 20 kHz PWM carrier synchronization and current reconstruction. |
| Energy Metering Front-End | Test & Measurement Equipment |
|
Use Scenario: Multi-point voltage and current sampling in polyphase electricity meters with anti-tampering diagnostics. IC Role / Device Role / Timing Role: Precision ADC interfacing with shunt resistors and isolation amplifiers; leverages self-test modes for periodic calibration validation. Use Value: Built-in self-test (0 V, VREF/2, VREF) allows automated metrological verification without external test fixtures. |
Use Scenario: Modular data acquisition modules in benchtop instruments requiring flexible channel configuration and traceable accuracy. IC Role / Device Role / Timing Role: Standalone serial ADC with programmable MSB/LSB-first output and configurable data length - simplifies firmware adaptation across product variants. Use Value: Pin-compatible DB package and identical timing behavior to TLC2543C/CDW variants enable shared PCB design across commercial/industrial grades. |
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 but no self-test or REF– input. | Limited to lower-accuracy applications; lacks ratiometric support and diagnostic capability. | Select when cost and speed outweigh resolution and robustness requirements. |
| TLC2543CDW | Same architecture and pinout; rated for 0°C to 70°C (commercial temp grade). | Suitable for non-industrial environments; not qualified for extended temperature operation. | Choose for cost-sensitive commercial designs where ambient temperature remains within 0–70°C. |
Compared with ADS7822U and TLC2543CDW, the TLC2543IDB uniquely combines industrial temperature range (–40°C to 85°C), 11-channel multiplexing, self-test functionality, and differential reference support - making it the only option among the three qualified for mission-critical industrial sensing with built-in diagnostics.
Availability
TLC2543IDB is available at Aetrix Electronics and suitable for industrial process monitoring, motor control feedback, and energy metering applications requiring stable component supply over extended temperature ranges and long production lifecycles.
Supply support for TLC2543IDB 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 precision data converter heritage.
The TLC2543 family was designed for industrial and instrumentation applications demanding reliable, multi-channel serial ADC performance with integrated diagnostics and wide-temperature operation.
FAQ
What is the operating temperature range of the TLC2543IDB?
The TLC2543IDB is specified for operation from –40°C to +85°C. This industrial-grade temperature rating makes it suitable for deployment in factory automation, motor drives, and outdoor instrumentation where ambient conditions exceed commercial limits. The TLC2543IDB maintains its 12-bit linearity and 10 µs conversion time across this full range, as verified in the SLAS079F datasheet.
Does the TLC2543IDB require an external sample-and-hold circuit?
No, the TLC2543IDB includes an inherent sample-and-hold function. Sampling begins automatically on the fourth falling edge of the I/O CLOCK signal, and the held voltage is converted during the subsequent conversion cycle. This eliminates the need for external S/H components, reducing board space and signal-path complexity in designs using the TLC2543IDB.
How many analog input channels does the TLC2543IDB support?
The TLC2543IDB supports 11 single-ended analog input channels (labeled AIN0 through AIN10). These are managed by an on-chip 14-channel multiplexer - 11 dedicated to external signals and 3 reserved for internal self-test voltages (0 V, VREF/2, and VREF). No external multiplexer is required to access all 11 channels.
Can the TLC2543IDB operate with a bipolar input range?
Yes, the TLC2543IDB supports both unipolar and bipolar output operation. When configured for bipolar mode (via the D0 bit in the control word), it outputs signed binary data referenced to VREF/2 - enabling direct digitization of AC signals or offset-voltage measurements without external level-shifting circuitry. The TLC2543IDB achieves this using its differential REF+ and REF– inputs.
What package type is used for the TLC2543IDB?
The TLC2543IDB is housed in a 20-pin small-outline integrated circuit (SOIC) package designated "DB". It measures 7.5 mm × 12.8 mm with 1.27 mm lead pitch and is RoHS-compliant. This package is pin-compatible with other members of the TLC2543 family (e.g., TLC2543CDW, TLC2543CDR), enabling drop-in substitution in existing DB-footprint layouts.
TLC2543IDB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- 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-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
TLC2543IDB FAQ
1.How can I place an order for TLC2543IDB through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC2543IDB 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 TLC2543IDB reliable?
The price and inventory of TLC2543IDB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC2543IDB is usually 5 days.
3.What payment methods are accepted for TLC2543IDB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC2543IDB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC2543IDB?
TLC2543IDB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC2543IDB 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 TLC2543IDB?
For technical support, including TLC2543IDB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC2543IDB requirements.
6.How does Aetrix verify that TLC2543IDB is sourced from the original manufacturer or authorized distributors?
All TLC2543IDB 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 TLC2543IDB meets industry standards.
7.What is the process for return or replacement of TLC2543IDB?
All TLC2543IDB units undergo pre-shipment inspection (PSI). If there is an issue with TLC2543IDB, 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 TLC2543IDB part is unused and in its original packaging.
Return procedure for TLC2543IDB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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