Texas Instruments TLV2543IDBR

Overview

TLV2543IDBR 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 over –40°C to 85°C, supports unipolar/bipolar output formats, and features programmable MSB/LSB-first data transfer and power-down mode. It serves in industrial sensor signal conditioning and embedded data acquisition systems requiring ratiometric accuracy and low-noise reference isolation.

For engineers reviewing the TLV2543IDBR datasheet, TLV2543IDBR pinout, TLV2543IDBR application, or TLV2543IDBR equivalent, key selection considerations include its 11-input multiplexing capability, EOC-synchronized serial timing, differential high-impedance reference inputs (REF+/REF–), 12-bit linearity error (±1 LSB max), and DB package compatibility with tape-and-reel automated assembly.

Technical Context

The TLV2543IDBR implements a switched-capacitor successive-approximation architecture with an integrated 14-channel analog multiplexer selecting among 11 external inputs or three internal test voltages. Its control logic accepts an 8-bit serial command (4-bit address + 2-bit data length + 1-bit MSB/LSB + 1-bit unipolar/bipolar) via DATA INPUT synchronized to I/O CLOCK.

Conversion is divided into two phases: an externally timed I/O cycle (8/12/16 clocks) handling address/control input and previous-result output, followed by an internally clocked conversion cycle initiated after the final I/O CLOCK falling edge. The EOC output transitions low at conversion start and high upon result latching - enabling precise timing coordination without external delay circuits.

Key Specifications

Pinout & Package

The TLV2543IDBR is housed in a 20-pin SSOP (DB) package with 0.65 mm lead pitch, optimized for surface-mount reflow assembly and tape-and-reel handling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV2543IDBR, ADS7822U trades resolution and diagnostics for size/cost, while TLV2548IDW offers identical performance in SOIC packaging - making TLV2543IDBR optimal for space-constrained industrial PCBs needing SSOP tape-and-reel manufacturability.

Availability

TLV2543IDBR is available at Aetrix Electronics and suitable for industrial sensor interface, motor control feedback, and automotive body electronics requiring stable component supply, long-lifecycle support, and RoHS-compliant tape-and-reel delivery.

Supply support for TLV2543IDBR 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 over 50 years of innovation in precision data converters.

The TLV2543IDBR belongs to TI's TLV254x family of low-power, serial 12-bit ADCs designed specifically for industrial automation, sensor signal chains, and embedded systems demanding high accuracy, multiplexing flexibility, and robust serial interface timing.

FAQ

What is the operating temperature range for the TLV2543IDBR?

The TLV2543IDBR is rated for operation from –40°C to +85°C, qualifying it for industrial and extended-temperature automotive applications. This specification is explicitly defined for the 'I' grade variant in the official SLAS096C datasheet, and the 'IDBR' suffix confirms this temperature grade and DB package configuration. The device maintains 12-bit linearity and 10-µs conversion time across this full range.

Does the TLV2543IDBR require an external clock source?

No - the TLV2543IDBR incorporates an on-chip system clock and relies solely on the externally supplied I/O CLOCK signal for serial interface synchronization. This I/O CLOCK controls both command input timing and data output shifting, eliminating the need for a separate master clock generator. The internal clock automatically aligns with the I/O CLOCK to initiate conversion after the final falling edge.

How many analog input channels does the TLV2543IDBR support?

The TLV2543IDBR supports 11 dedicated analog input channels (AIN0 through AIN10), managed by an integrated 14-channel analog multiplexer. Three additional multiplexer positions are reserved for internal self-test voltages (Vref+, Vref–, and their midpoint), not external connections. All 11 inputs are single-ended and share the same reference structure (REF+/REF–).

Can the TLV2543IDBR perform bipolar (signed) conversions?

Yes - the TLV2543IDBR supports both unipolar (unsigned binary) and bipolar (two's complement) output formats, selected via the D0 bit in the 8-bit input command register. When D0 = 1, the output represents signed values centered at (Vref+ + Vref–)/2, with the MSB acting as the sign bit. This feature is confirmed in the "data register, bipolar format" section of the SLAS096C datasheet and applies directly to the TLV2543IDBR.

What package type is used for the TLV2543IDBR?

The TLV2543IDBR uses a 20-pin SSOP (Shrink Small Outline Package), designated as the 'DB' package in Texas Instruments documentation. This is explicitly confirmed in the "AVAILABLE OPTIONS" table and the "† Available in tape and reel and ordered as the TLV2543CDWR, TLV2543CDBLE, TLV2543IDBR…" note. The DB package has a 0.65 mm lead pitch and is compatible with standard SMT reflow processes.