Texas Instruments TLC2543MDBREP

Overview

TLC2543MDBREP from Texas Instruments is a radiation-hardened, 12-bit successive-approximation analog-to-digital converter (ADC) with serial SPI-compatible interface, 11-channel analog multiplexer, and on-chip sample-and-hold. It delivers ±1 LSB linearity error, 10 µs conversion time, and operates across –55°C to 125°C for aerospace and defense data acquisition systems.

For engineers reviewing the TLC2543MDBREP datasheet, TLC2543MDBREP pinout, TLC2543MDBREP application, or TLC2543MDBREP equivalent, this page provides verified electrical specifications, terminal-level design meaning, real-world timing behavior, self-test capability mapping, and drop-in alternatives for high-reliability embedded signal conditioning.

Technical Context

The TLC2543MDBREP implements a switched-capacitor SAR architecture synchronized to an external I/O CLOCK (up to 4.1 MHz), with internal state control triggered on the final falling edge of each I/O cycle. Its 14-channel multiplexer selects among 11 analog inputs (AIN0–AIN10), three internal reference test voltages, or power-down mode via 4-bit address input.

Conversion is inherently ratiometric due to differential high-impedance REF+/REF– inputs, supporting unipolar or bipolar (2's complement) output formats. Programmable data length (8/12/16 bits) and MSB/LSB-first selection enable flexible host processor interfacing without hardware changes.

Key Specifications

Pinout & Package

Package: SSOP-20 (DB package), 0.209-inch body width, gull-wing leads, JEDEC MO-153 compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit serial ADC applications.

Compared with TLC2543MDBREP, ADS8320UB trades channel integration and self-test for resolution, while MAX11131ETL+ sacrifices military-grade temperature range and radiation hardening for throughput and integrated reference-making TLC2543MDBREP uniquely suited for space-qualified, multi-sensor, fault-aware systems.

Availability

TLC2543MDBREP is available at Aetrix Electronics and suitable for avionics telemetry, satellite power management, missile guidance signal conditioning, and nuclear plant control system I/O requiring stable component supply across extended lifecycle programs.

Supply support for TLC2543MDBREP 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, with decades of heritage in aerospace and defense IC development.

The TLC2543 family was designed specifically for radiation-tolerant, high-temperature data acquisition in mission-critical platforms-emphasizing ratiometric accuracy, self-diagnostic capability, and seamless SPI integration without external support circuitry.

FAQ

What is the maximum I/O CLOCK frequency supported by the TLC2543MDBREP?

The TLC2543MDBREP supports up to 4.1 MHz I/O CLOCK frequency across its full operating temperature range of –55°C to +125°C. This allows minimum I/O cycle times of 244 ns per clock period, enabling 12-bit transfers in under 3 µs and sustaining ≥100 kSPS effective sampling rates when paired with appropriate host timing.

Does the TLC2543MDBREP require an external reference voltage?

No-the TLC2543MDBREP does not require an external reference, but it does require externally applied REF+ and REF− voltages to define its conversion range. These can be derived from VCC and GND (for unipolar 0–VCC operation) or from precision references (e.g., REF5025) for higher accuracy. The device's differential reference inputs inherently support ratiometric configurations.

How does the self-test functionality work on the TLC2543MDBREP?

The TLC2543MDBREP provides three factory-calibrated self-test modes selectable via the 4-bit address field: (1) mid-scale at (REF+ − REF−)/2, (2) zero-scale at REF−, and (3) full-scale at REF+. When activated, these inject known reference voltages into the SAR core-enabling deterministic verification of gain, offset, and linearity without external test equipment.

Can the TLC2543MDBREP operate with LSB-first data format?

Yes-the TLC2543MDBREP supports both MSB-first and LSB-first serial output via the LSBF bit (D1) in the 8-bit input register. When LSBF = 1, DATA OUT shifts the least significant bit first during each I/O cycle. This mode simplifies firmware integration with certain DSPs and microcontrollers that natively expect LSB-aligned data streams.

What is the purpose of the EOC pin on the TLC2543MDBREP?

The EOC (End-of-Conversion) pin on the TLC2543MDBREP is an active-low, open-drain output that transitions low after the final I/O CLOCK falling edge and remains low until conversion completes and the result is latched into the output register. It serves as hardware-ready signaling for DMA engines or interrupt-driven host processors-eliminating polling delays and ensuring deterministic data capture timing.