Texas Instruments TLV2543IDWR

Overview

TLV2543IDWR 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 across –40°C to 85°C, ±1 LSB linearity error, and supports unipolar/bipolar output formats. Used in industrial sensor data acquisition systems requiring ratiometric measurement and low-noise analog front-end interfacing.

For engineers reviewing the TLV2543IDWR datasheet, TLV2543IDWR pinout, TLV2543IDWR application, or TLV2543IDWR equivalent, key selection considerations include its 11 analog inputs, programmable MSB/LSB-first output, 3 self-test modes, 10-µs conversion time, and compatibility with microcontroller SPI-like serial ports via CS/I/O CLOCK/DATA INPUT/DATA OUT control.

Technical Context

The TLV2543IDWR implements a switched-capacitor successive-approximation architecture with an internal 14-channel multiplexer selecting among 11 external analog inputs or three internal reference test voltages. Its differential high-impedance REF+/REF– inputs enable ratiometric conversion and isolation from supply noise.

Conversion is synchronized to an external I/O CLOCK; sampling begins on the fourth falling edge and completes on the eighth, twelfth, or sixteenth falling edge depending on programmed output length (8/12/16 bits). EOC asserts low at conversion start and high upon result latching - enabling precise timing control without host polling.

Key Specifications

Pinout & Package

TLV2543IDWR is housed in a 20-pin SOIC (DW) package with tape-and-reel delivery (DWR suffix). The package measures 7.5 mm × 12.8 mm × 2.35 mm (body), with 1.27 mm pitch and gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7822U and TLV2548IDW, the TLV2543IDWR uniquely balances 12-bit precision, 11-channel flexibility, self-test capability, and pure external reference control - making it the preferred choice for industrial systems requiring field-calibratable, noise-immune analog acquisition without reference drift dependencies.

Availability

TLV2543IDWR is available at Aetrix Electronics and suitable for industrial process monitoring, automotive sensor interface, and portable data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLV2543IDWR 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 digital signal technologies, with decades of heritage in precision data converters and industrial-grade ICs.

The TLV2543IDWR belongs to TI's legacy precision ADC portfolio designed for robust, low-power, multi-channel analog sensing in harsh environments - emphasizing reliability, ratiometric accuracy, and ease of integration with microcontroller serial peripherals.

FAQ

What is the operating temperature range for the TLV2543IDWR?

The TLV2543IDWR is characterized for operation from –40°C to +85°C, meeting industrial and extended-temperature automotive requirements. This rating is confirmed in the official Texas Instruments SLAS096C datasheet, and the 'I' suffix explicitly denotes the –40°C to 85°C grade. The DW package construction and internal design ensure parametric stability across this full range without derating.

Does the TLV2543IDWR require an external reference voltage?

Yes, the TLV2543IDWR requires externally applied reference voltages on REF+ and REF– pins. It does not include an internal reference. The device supports ratiometric operation - where REF+ and REF– track the analog sensor excitation or supply - enabling high-accuracy measurements immune to supply variation. The reference inputs accept voltages from 1 V to VCC, with differential range up to VCC.

How many analog input channels does the TLV2543IDWR support?

The TLV2543IDWR supports 11 single-ended analog input channels (AIN0 through AIN10), managed by an internal 14-channel multiplexer. Three additional multiplexer positions are reserved for internal self-test voltages: (VREF+ − VREF–)/2, VREF–, and VREF+. Channel selection is controlled via a 4-bit address loaded serially through the DATA INPUT pin.

Can the TLV2543IDWR interface directly with an SPI bus?

The TLV2543IDWR uses a 3-wire serial interface (CS, I/O CLOCK, DATA INPUT/OUTPUT) compatible with SPI timing conventions but not fully SPI protocol-compliant. It lacks dedicated MOSI/MISO lines and requires careful synchronization: DATA OUT shifts out the *previous* conversion result during the *current* I/O cycle, and EOC provides conversion status. Most microcontrollers implement this as a custom SPI mode with CS-controlled timing.

What is the purpose of the EOC pin on the TLV2543IDWR?

The EOC (End-of-Conversion) pin on the TLV2543IDWR is an active-low open-drain output that signals conversion status. It goes low at the start of the conversion cycle (after the last I/O CLOCK falling edge) and returns high when the 12-bit result is latched and ready for serial readout. This enables interrupt-driven data capture, eliminating the need for continuous polling and improving system efficiency in real-time applications.