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Texas Instruments TLC2543MJB
- Part No.:
- TLC2543MJB
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-CDIP (0.300", 7.62mm)
- Datasheet:
-
TLC2543MJB.pdf
- Description:
- IC ADC 12BIT
- Quantity:
- Payment:
- Shipping:
Inventory:3,006
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Product details
Overview
TLC2543MJB 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 across –55°C to 125°C for rugged industrial and aerospace data acquisition systems.
For engineers reviewing the TLC2543MJB datasheet, TLC2543MJB pinout, TLC2543MJB application, or TLC2543MJB equivalent, key selection factors include its wide temperature range, programmable output data length (8/12/16 bits), unipolar/bipolar operation mode, and built-in self-test functionality for system-level diagnostics.
Technical Context
The TLC2543MJB uses a switched-capacitor successive-approximation architecture with an integrated 14-channel analog multiplexer selecting among 11 external inputs or three internal self-test voltages. Its differential high-impedance reference inputs (REF+, REF–) support ratiometric conversion and noise isolation.
Control is implemented via three serial interface signals - CS, I/O CLOCK, and DATA INPUT - enabling communication with microcontrollers without parallel bus overhead. Conversion timing is synchronized to the I/O CLOCK, with sampling initiated on the fourth falling edge and conversion starting after the final clock edge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete digital codes for high-fidelity sensor signal digitization. |
| Conversion Time | 10 µs - enables up to 100 kSPS sustained sampling in systems with tight timing budgets. |
| Analog Inputs | 11-channel - supports multi-sensor monitoring (e.g., temperature, pressure, voltage rails) without external mux. |
| Linearity Error | ±1 LSB max - ensures monotonicity and predictable transfer function across full scale. |
| Operating Temperature | –55°C to 125°C - qualified for military, avionics, and downhole industrial environments. |
| Reference Interface | Differential REF+/REF– - allows flexible ratiometric scaling and rejection of common-mode supply noise. |
| Power-Down Current | 4–25 µA - reduces idle power in battery-backed or intermittent-sampling applications. |
Pinout & Package
The TLC2543MJB is supplied in a 20-pin ceramic dual in-line package (CERDIP), designated J package per TI documentation, with through-hole mounting and MIL-PRF-38535 compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN10 | Analog input | 11 multiplexed single-ended inputs; source impedance ≤50 Ω required for full 4.1 MHz clock operation. |
| CS | Chip select | Active-low enable; resets internal logic and activates DATA OUT/DATA INPUT/I/O CLOCK on falling edge. |
| DATA INPUT | Serial address/control input | Accepts 4-bit channel address + 2-bit data length + MSB/LSB + unipolar/bipolar config on rising I/O CLOCK edges. |
| DATA OUT | Serial conversion result output | 3-state output; shifts previous conversion result synchronously with I/O CLOCK falling edges. |
| EOC | End-of-conversion indicator | Active-low open-drain flag; goes low after last I/O CLOCK falling edge and high when data is ready. |
| I/O CLOCK | Serial interface clock | Controls address latching, sampling initiation (4th falling edge), and data shift timing; max 4.1 MHz. |
| REF+ | Positive reference voltage | Nominally tied to VCC; sets upper bound of analog input range (VREF+ – VREF–). |
| REF– | Negative reference voltage | Nominally tied to GND; defines lower bound and enables bipolar signed-binary output mode. |
| VCC | Supply voltage | 4.5 V to 5.5 V operation; powers internal logic, reference circuitry, and analog front-end. |
| GND | Ground reference | Common return for analog and digital sections; all voltage measurements referenced here. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip sample-and-hold | Eliminates need for external S/H circuitry; sampling automatically triggered during I/O cycle. |
| Three self-test modes | Enables verification of ADC functionality using internal reference voltages (0 V, mid-scale, full-scale). |
| Programmable output data length | Supports 8-, 12-, or 16-bit transfers - optimizes SPI bandwidth and host processor overhead. |
| MSB or LSB first configuration | Allows alignment with host MCU's native serial peripheral endianness without software bit-reversal. |
| Unipolar/bipolar output mode | Configurable signed binary output relative to VREF–, enabling direct measurement of AC-coupled or differential signals. |
Applications
| Motor Control Feedback | Avionics Sensor Interface |
|---|---|
Use Scenario: Real-time monitoring of phase currents, DC bus voltage, and temperature sensors in brushless DC motor drives. IC Role / Device Role / Timing Role: Primary ADC for closed-loop current/voltage sensing with deterministic 10 µs conversion latency. Use Value: Enables precise field-oriented control at >10 kHz PWM frequencies while supporting 11-input channel consolidation. | Use Scenario: Acquisition of cabin pressure, pitot-static, and engine vibration signals in flight data recorders and health monitoring units. IC Role / Device Role / Timing Role: Ruggedized front-end ADC operating across –55°C to 125°C with built-in self-test for DO-160 compliance. Use Value: Eliminates external calibration routines via on-chip test modes and maintains accuracy under thermal shock and EMI stress. |
| Industrial Process Monitoring | Military Power System Telemetry |
Use Scenario: Multi-point analog monitoring of tank levels, flow rates, and valve positions in oil & gas SCADA systems. IC Role / Device Role / Timing Role: High-reliability ADC interfacing to isolated 4–20 mA transmitters and RTD bridges via precision reference routing. Use Value: Differential REF+/REF– inputs reject common-mode noise from long sensor cables in electrically noisy plant environments. | Use Scenario: Voltage, current, and temperature telemetry in vehicle-mounted power distribution units and radar cooling subsystems. IC Role / Device Role / Timing Role: Radiation-tolerant (MIL-PRF-38535 Class K) ADC with extended temperature range for embedded COTS modules. Use Value: Ceramic DIP (J package) construction ensures mechanical stability and hermetic sealing under shock/vibration per MIL-STD-810. |
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, 2.7–5.25 V supply, –40°C to 85°C rating | Limited to lower-precision, commercial-temperature applications; lacks self-test and multiplexer | Select only if resolution and temperature range requirements are relaxed and board space is constrained. |
| MAX11131ATI+ | 12-bit, 1 MSPS, internal reference, SPI interface, –40°C to 125°C, 20-pin TQFN | Higher speed but no analog multiplexer; requires external mux for multi-channel use; different pinout and layout | Prefer when sampling rate >100 kSPS is needed and channel count is low or external mux is acceptable. |
Compared with ADS7822U and MAX11131ATI+, the TLC2543MJB uniquely combines 11-channel multiplexing, military-grade temperature range, and integrated self-test in a through-hole ceramic package - making it irreplaceable for legacy-reliant, high-integrity analog acquisition where pin compatibility and long-term availability are critical.
Availability
TLC2543MJB is available at Aetrix Electronics and suitable for motor control feedback, avionics sensor interface, and industrial process monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLC2543MJB 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 high-reliability components for industrial, automotive, and aerospace markets.
The TLC2543 family was designed for high-accuracy, multi-channel data acquisition in harsh environments - emphasizing robust serial interface operation, on-chip diagnostics, and extended temperature performance without external support components.
FAQ
What is the maximum I/O CLOCK frequency supported by the TLC2543MJB?
The TLC2543MJB supports an I/O CLOCK frequency up to 4.1 MHz across its full operating temperature range of –55°C to 125°C. This timing specification is validated per the electrical characteristics table in the SLAS079F datasheet and enables reliable 10 µs conversion cycles with deterministic setup/hold margins. The TLC2543MJB maintains this clock rate under worst-case voltage (4.5 V) and temperature conditions without derating.
Does the TLC2543MJB require an external sample-and-hold circuit?
No, the TLC2543MJB does not require an external sample-and-hold circuit. It incorporates an inherent sample-and-hold function that is automatically activated during the I/O cycle - sampling begins on the fourth falling edge of the I/O CLOCK and holds until the last falling edge. This integrated capability is confirmed in the device description and functional block diagram of the SLAS079F datasheet.
How does the TLC2543MJB handle bipolar input signals?
The TLC2543MJB supports bipolar operation via its programmable output mode: when configured for bipolar output, it delivers signed binary results referenced to ½ × (VREF+ – VREF–). Input voltages below VREF– convert to all zeros (0x000), and those above VREF+ convert to all ones (0xFFF), with linear mapping between. This behavior is explicitly defined in the "Unipolar or Bipolar Output Operation" section of the SLAS079F datasheet.
What self-test voltages are available on the TLC2543MJB?
The TLC2543MJB provides three internal self-test voltages accessible via the analog multiplexer: 0 V (ground), VREF+/2 (mid-scale), and VREF+ (full-scale). These are selected using specific 4-bit address codes (1011, 1100, and 1101 respectively) applied to DATA INPUT, and produce deterministic output codes of 2048, 0, and 4095 - enabling hardware-level validation without external stimulus.
Is the TLC2543MJB pin-compatible with other variants in the TLC2543 family?
Yes, the TLC2543MJB is pin-compatible with the TLC2543CDB, TLC2543IDW, and other J/DW/DB/FN-package variants of the TLC2543 family. All share identical 20-pin pinout, terminal functions, and serial interface protocol. The primary differences are temperature grading (–55°C to 125°C for M-grade) and packaging (ceramic DIP J package), as confirmed in the "AVAILABLE OPTIONS" table of SLAS079F.
TLC2543MJB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-CDIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 66k
- Number of Inputs:
- 11
- Input Type:
- Single Ended
- Data Interface:
- Serial
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 4.5V ~ 5.5V
- Voltage - Supply, Digital:
- 4.5V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -55°C ~ 125°C
- Supplier Device Package:
- 20-CDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
TLC2543MJB FAQ
1.How can I place an order for TLC2543MJB through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC2543MJB 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 TLC2543MJB reliable?
The price and inventory of TLC2543MJB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC2543MJB is usually 5 days.
3.What payment methods are accepted for TLC2543MJB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC2543MJB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC2543MJB?
TLC2543MJB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC2543MJB 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 TLC2543MJB?
For technical support, including TLC2543MJB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC2543MJB requirements.
6.How does Aetrix verify that TLC2543MJB is sourced from the original manufacturer or authorized distributors?
All TLC2543MJB 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 TLC2543MJB meets industry standards.
7.What is the process for return or replacement of TLC2543MJB?
All TLC2543MJB units undergo pre-shipment inspection (PSI). If there is an issue with TLC2543MJB, 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 TLC2543MJB part is unused and in its original packaging.
Return procedure for TLC2543MJB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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