Texas Instruments TLV2543CDWR

Overview

TLV2543CDWR from Texas Instruments is a 12-bit successive-approximation analog-to-digital converter (ADC) with serial interface, 11-channel analog multiplexer, on-chip sample-and-hold, and built-in self-test modes. It delivers 10-µs conversion time across 0°C to 70°C, supports unipolar/bipolar output formats, and operates with programmable MSB/LSB-first data transfer and power-down mode. It is used in industrial sensor signal conditioning systems requiring high-resolution, low-noise digitization of multiple analog inputs.

For engineers reviewing the TLV2543CDWR datasheet, TLV2543CDWR pinout, TLV2543CDWR application, or TLV2543CDWR equivalent, key selection considerations include its 12-bit resolution with ±1 LSB linearity error, 11 analog input channels with internal 14-channel mux, EOC-driven timing control, CMOS-compatible serial interface (CS/I/O CLOCK/DATA INPUT/DATA OUT), and DW package compatibility for space-constrained PCB layouts.

Technical Context

The TLV2543CDWR implements a switched-capacitor successive-approximation architecture with differential high-impedance reference inputs (REF+/REF–) enabling ratiometric conversion and noise isolation. Its internal 14-channel analog multiplexer selects among 11 external analog inputs or three internal self-test voltages, with break-before-make switching to minimize inter-channel crosstalk.

Conversion is synchronized to an external I/O CLOCK, supporting 8-, 12-, or 16-bit serial output lengths - where 12-bit mode preserves full resolution, 8-bit truncates LSBs for speed, and 16-bit appends zero pad bits for 16-bit interface alignment. The EOC signal transitions low at conversion start and high upon result latching, providing precise timing coordination without external logic.

Key Specifications

Pinout & Package

TLV2543CDWR is housed in a 20-pin SOIC (DW) package, tape-and-reel packaged per order code TLV2543CDWR. Pin functions are validated per TI SLAS096C datasheet (Rev. June 2000).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV2543CDWR, ADS7822U trades resolution and features for cost and simplicity, while TLV2548CDW offers identical performance in an 8-channel variant - making it a drop-in alternative when fewer inputs are required and layout compatibility is prioritized.

Availability

TLV2543CDWR is available at Aetrix Electronics and suitable for industrial sensor monitoring, automotive body control units, and portable test equipment requiring stable component supply, long-lifecycle support, and verified tape-and-reel packaging for automated assembly.

Supply support for TLV2543CDWR 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 expertise in precision data converters and industrial-grade ICs.

The TLV2543CDWR belongs to TI's legacy precision ADC product line, designed specifically for cost-effective, multi-channel, serial-interface data acquisition in industrial and automotive environments where reliability, temperature stability, and integrated diagnostics are essential.

FAQ

What is the operating temperature range for the TLV2543CDWR?

The TLV2543CDWR is characterized for operation from 0°C to 70°C, as indicated by the "C" suffix in its part number. This commercial-grade rating makes it suitable for indoor industrial controls, consumer test gear, and non-extreme automotive cabin applications. It is not rated for extended temperature ranges like the TLV2543I (–40°C to 85°C), and operation outside 0°C–70°C may result in parametric degradation or failure.

Does the TLV2543CDWR require an external clock source or does it have an on-chip oscillator?

The TLV2543CDWR does not include an on-chip oscillator for conversion timing; instead, it relies entirely on the externally supplied I/O CLOCK signal for serial communication, sampling control, and conversion triggering. However, it does integrate an on-chip system clock derived from the I/O CLOCK to synchronize internal successive-approximation operations - eliminating the need for a separate conversion clock generator.

How many analog input channels does the TLV2543CDWR support, and are they single-ended or differential?

The TLV2543CDWR supports 11 single-ended analog input channels (AIN0 through AIN10), selected via its internal 14-channel analog multiplexer. It does not support true differential input pairs; all analog inputs are referenced to the device's internal ground path and scaled relative to the REF+ and REF– reference terminals. Input signals must be within the specified absolute maximum ratings and driven from sources with ≤50 Ω impedance for optimal 4.1-MHz I/O CLOCK performance.

Can the TLV2543CDWR perform self-calibration or built-in diagnostics?

Yes, the TLV2543CDWR includes three hardware-based self-test modes that apply internal reference voltages - (Vref+ − Vref–)/2, Vref–, and Vref+ - to the analog input mux. These modes allow firmware to verify ADC functionality, gain/offset behavior, and reference integrity without external test equipment. The test results appear as standard 12-bit conversion outputs, enabling automated pass/fail evaluation during power-up or periodic health checks.

What package type and lead count does the TLV2543CDWR use, and is it RoHS compliant?

The TLV2543CDWR uses a 20-pin SOIC (DW) package with standard 0.3-inch body width and gull-wing leads. Per Texas Instruments' published documentation and packaging data, the DW package variant is lead-free and RoHS compliant. The "R" suffix in TLV2543CDWR explicitly denotes tape-and-reel packaging - confirming suitability for automated SMT assembly processes.