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Texas Instruments TLC2543CDWG4
- Part No.:
- TLC2543CDWG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
TLC2543CDWG4.pdf
- Description:
- IC ADC 12BIT SAR 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,671
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Product details
Overview
TLC2543CDWG4 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 0°C to 70°C. Used in industrial data acquisition systems requiring high-resolution sensor digitization with minimal external components.
For engineers reviewing the TLC2543CDWG4 datasheet, TLC2543CDWG4 pinout, TLC2543CDWG4 application, or TLC2543CDWG4 equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, and two confirmed alternative parts for system-level selection - all grounded in TI's SLAS079F datasheet and package documentation.
Technical Context
The TLC2543CDWG4 implements a switched-capacitor SAR architecture with an integrated 14-channel analog multiplexer (11 external inputs + 3 internal self-test voltages). Its control logic accepts an 8-bit serial command - comprising 4-bit channel address, 2-bit data length select (8/12/16 bits), MSB/LSB-first bit, and unipolar/bipolar mode - via DATA INPUT synchronized to I/O CLOCK.
Conversion timing is tightly coupled to the I/O cycle: sampling begins on the fourth falling edge of I/O CLOCK and completes after the final falling edge, triggering EOC low; conversion then proceeds autonomously using the on-chip system clock. The device features differential high-impedance reference inputs (REF+/REF–) enabling ratiometric measurement and noise isolation between analog and digital domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for high-fidelity sensor signal digitization. |
| Conversion Time | 10 µs - enables ≥100 kSPS throughput when using 4.1 MHz I/O CLOCK, suitable for real-time monitoring. |
| Linearity Error | ±1 LSB max - ensures monotonicity and ≤0.024% full-scale deviation, critical for precision measurement accuracy. |
| Analog Inputs | 11 channels - reduces external multiplexer count and PCB area in multi-sensor systems like PLC I/O modules. |
| Reference Interface | Differential REF+/REF– - supports ratiometric operation and eliminates supply-voltage drift impact on conversion gain. |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade embedded instrumentation and factory automation equipment. |
| Power-Down Current | 4 µA typical - extends battery life in portable data loggers during idle intervals without sacrificing wake-up latency. |
Pinout & Package
TLC2543CDWG4 is housed in a 20-pin SOIC (DW) package with 0.300-inch body width and standard gull-wing leads. Pin numbering follows JEDEC MS-013, with GND (Pin 10) and VCC (Pin 20) positioned diagonally opposite for optimal decoupling layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN10 | Analog input (11 channels) | Accepts single-ended signals up to VCC; input impedance ≤50 Ω required for full 4.1 MHz clock operation. |
| CS | Chip select | Active-low enable: resets internal logic, activates DATA INPUT/I/O CLOCK, and releases DATA OUT from Hi-Z state. |
| DATA INPUT | Serial address/control input | Receives 8-bit command (channel + mode) MSB-first on rising I/O CLOCK edges; ignored after first 8 clocks. |
| DATA OUT | Serial conversion result output | 3-state output; shifts previous conversion result LSB/MSB-first depending on command; driven only when CS is low. |
| EOC | End-of-conversion indicator | Active-low open-drain signal; goes low at start of conversion, high when result is latched and ready for readout. |
| I/O CLOCK | Serial interface clock | Controls both input command latching and output data shifting; defines sampling window and conversion trigger timing. |
| REF+, REF– | Differential reference inputs | Set full-scale range (VREF+ – VREF–); support 2.5 V to VCC+0.1 V range; enable ratiometric scaling against sensor excitation. |
| GND, VCC | Power supply terminals | VCC = 4.5–5.5 V; GND serves as analog/digital common reference; requires local 0.1 µF ceramic + 10 µF tantalum decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable output data length | 8/12/16-bit serial output - allows bandwidth optimization: 8-bit for fast status checks, 12-bit for full resolution, 16-bit for extended diagnostics. |
| Three built-in self-test modes | Internal test voltages (0 V, mid-scale, full-scale) accessible via address codes 1100b, 1011b, 1101b - enables automated calibration and fault detection without external stimuli. |
| Inherent sample-and-hold function | Automatic acquisition on fourth falling I/O CLOCK edge - eliminates need for external S/H circuitry and associated timing complexity. |
| Unipolar or bipolar output operation | Signed binary output referenced to VREF+/2 - supports direct digitization of AC-coupled or offset sensors (e.g., strain gauges, thermocouples) without external level-shifting. |
| CMOS process technology | Low power consumption (2.5 mA typical ICC) and TTL/CMOS-compatible logic levels - simplifies interfacing with microcontrollers and FPGAs. |
Applications
| Industrial Process Monitoring | Automated Test Equipment (ATE) |
|---|---|
|
Use Scenario: Continuous voltage/current measurement from 11 temperature, pressure, and flow sensors in a PLC rack. IC Role / Device Role / Timing Role: Central 12-bit ADC with integrated multiplexer handles sequential channel scanning under microcontroller SPI-like control. Use Value: Eliminates external analog mux and reduces BOM count by one IC while maintaining ≤10 µs per channel conversion latency. |
Use Scenario: High-speed parametric testing of semiconductor devices requiring precise DC bias and response sampling. IC Role / Device Role / Timing Role: Digitizes reference and DUT output voltages with ratiometric accuracy using differential REF+/REF– inputs. Use Value: Achieves ±1 LSB linearity and 0.024% full-scale stability over temperature - meets Class II ATE accuracy requirements. |
| Portable Data Loggers | Motor Control Feedback Systems |
|
Use Scenario: Battery-powered environmental logger capturing temperature, humidity, and light intensity over 72-hour cycles. IC Role / Device Role / Timing Role: Low-power ADC entering 4 µA sleep mode between 1-second sampling intervals. Use Value: Extends AA-cell lifetime beyond 12 months by minimizing active current and enabling deep-sleep state without reset loss. |
Use Scenario: Real-time current sensing and position feedback in closed-loop servo drives with dual shunt or resolver interfaces. IC Role / Device Role / Timing Role: Simultaneous sampling of motor phase currents and encoder signals via 11-channel analog front-end. Use Value: Supports 100 kSPS aggregate throughput with deterministic 10 µs conversion - enables 10 kHz current loop bandwidth. |
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 - smaller footprint but lower resolution and fewer channels. | Best for cost-sensitive, space-constrained designs where 8-bit accuracy suffices (e.g., basic panel meters). | Select ADS7822U only if resolution ≤8 bits and channel count ≤1 are acceptable; not drop-in compatible due to different pinout and command structure. |
| MCP3201-I/P | 12-bit resolution, single-ended input only, no internal mux, 10 µs conversion, SPI-compatible - lacks multiplexing and self-test modes. | Suitable for single-sensor systems (e.g., battery voltage monitor) where simplicity and low pin count outweigh feature needs. | Choose MCP3201-I/P when only one analog input is required and self-test or multi-channel scanning is unnecessary; requires external mux for >1 channel. |
Compared with TLC2543CDWG4, ADS7822U trades resolution and channel count for speed and size, while MCP3201-I/P retains 12-bit accuracy but removes multiplexing and diagnostic capability - making TLC2543CDWG4 uniquely suited for compact, multi-sensor industrial data acquisition where integration and reliability are prioritized.
Availability
TLC2543CDWG4 is available at Aetrix Electronics and suitable for industrial process monitoring, automated test equipment, portable data loggers, and motor control feedback systems requiring stable component supply and long-term manufacturability.
Supply support for TLC2543CDWG4 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 heritage in precision data converters and industrial-grade ICs.
The TLC2543 family was designed specifically for high-accuracy, multi-channel data acquisition in commercial and industrial environments - emphasizing integration (mux + S/H + ref), noise immunity, and flexible serial interfacing over raw speed.
FAQ
What is the maximum I/O CLOCK frequency supported by the TLC2543CDWG4?
The TLC2543CDWG4 supports up to 4.1 MHz I/O CLOCK frequency under recommended operating conditions (VCC = 4.5–5.5 V, TA = 0°C to 70°C). 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) ensuring reliable serial communication and sampling timing integrity in the TLC2543CDWG4.
Does the TLC2543CDWG4 require an external sample-and-hold circuit?
No, the TLC2543CDWG4 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 system cost and board area while maintaining timing coherence in the TLC2543CDWG4.
How does the TLC2543CDWG4 handle bipolar input signals?
The TLC2543CDWG4 supports bipolar operation via its signed binary output mode (selected by D0 bit in command word), where output codes are referenced to VREF+/2. When VREF– = 0 V and VREF+ = VCC, inputs from 0 V to VCC produce 0x000 to 0xFFF; negative inputs relative to VREF+/2 yield signed codes - enabling direct digitization of AC-coupled or offset analog signals in the TLC2543CDWG4.
What self-test voltages are available on the TLC2543CDWG4?
The TLC2543CDWG4 provides three internal self-test voltages accessible via specific 4-bit address codes on DATA INPUT: 0x0 (0 V), 0xB (mid-scale ≈ VREF+/2), and 0xC (full-scale ≈ VREF+). These allow firmware-driven validation of ADC linearity, offset, and gain without external test equipment - a key diagnostic capability built into the TLC2543CDWG4.
Can the TLC2543CDWG4 operate with a 3.3 V supply?
No - the TLC2543CDWG4 requires VCC between 4.5 V and 5.5 V per its recommended operating conditions. Operation below 4.5 V violates specification and may cause conversion errors, timing violations, or failure to meet ±1 LSB linearity. For 3.3 V systems, level-shifting or a compatible 3.3 V ADC (e.g., ADS7822) must be used instead of the TLC2543CDWG4.
TLC2543CDWG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 20-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
TLC2543CDWG4 FAQ
1.How can I place an order for TLC2543CDWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC2543CDWG4 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 TLC2543CDWG4 reliable?
The price and inventory of TLC2543CDWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC2543CDWG4 is usually 5 days.
3.What payment methods are accepted for TLC2543CDWG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC2543CDWG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC2543CDWG4?
TLC2543CDWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC2543CDWG4 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 TLC2543CDWG4?
For technical support, including TLC2543CDWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC2543CDWG4 requirements.
6.How does Aetrix verify that TLC2543CDWG4 is sourced from the original manufacturer or authorized distributors?
All TLC2543CDWG4 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 TLC2543CDWG4 meets industry standards.
7.What is the process for return or replacement of TLC2543CDWG4?
All TLC2543CDWG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLC2543CDWG4, 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 TLC2543CDWG4 part is unused and in its original packaging.
Return procedure for TLC2543CDWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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