Texas Instruments TLV2543CDBRG4

Overview

TLV2543CDBRG4 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 ratiometric measurement and noise-immune serial interfacing.

For engineers reviewing the TLV2543CDBRG4 datasheet, TLV2543CDBRG4 pinout, TLV2543CDBRG4 application, or TLV2543CDBRG4 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, differential reference inputs for supply-noise rejection, and compatibility with microcontroller SPI-like serial ports via CS/I/O CLOCK/DATA INPUT/DATA OUT signals.

Technical Context

The TLV2543CDBRG4 implements a switched-capacitor successive-approximation architecture with an integrated 14-channel analog multiplexer selecting among 11 external analog inputs or three internal test voltages. Its conversion cycle is internally synchronized to the I/O CLOCK, decoupling accuracy from external digital noise.

It features differential high-impedance reference inputs (REF+/REF–), enabling ratiometric operation and isolation of analog circuitry from logic supply noise. Sampling begins on the fourth falling edge of I/O CLOCK and completes on the last falling edge-8th, 12th, or 16th-depending on programmed output data length (8/12/16 bits).

Key Specifications

Pinout & Package

TLV2543CDBRG4 is housed in a 20-pin SOIC (Small Outline Integrated Circuit) package (DB suffix), 7.5 mm wide, surface-mount compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV2543CDBRG4, ADS7822U trades resolution and integration for lower cost and smaller footprint, while MCP3201-I/P provides basic 12-bit conversion but requires external support circuitry for multi-channel or diagnostic functionality - making TLV2543CDBRG4 optimal for compact, self-contained, multi-sensor measurement systems demanding verified accuracy.

Availability

TLV2543CDBRG4 is available at Aetrix Electronics and suitable for industrial automation, test equipment, and energy metering applications requiring stable component supply, long-term obsolescence management, and traceable sourcing.

Supply support for TLV2543CDBRG4 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 TLV2543CDBRG4 belongs to TI's legacy precision ADC family designed for cost-sensitive, noise-resilient industrial measurement systems requiring integrated multiplexing, serial interface efficiency, and robust operation from 0°C to 70°C.

FAQ

What is the operating temperature range for the TLV2543CDBRG4?

The TLV2543CDBRG4 is characterized for operation from 0°C to 70°C - designated by the "C" suffix in the part number. This commercial-grade temperature rating makes it suitable for indoor industrial controls, test instrumentation, and consumer-grade measurement devices where ambient conditions remain within this envelope. The device maintains guaranteed 12-bit performance and ±1 LSB linearity across this full range without external calibration.

Does the TLV2543CDBRG4 require an external clock source for conversion?

No, the TLV2543CDBRG4 uses an on-chip system clock synchronized to the externally supplied I/O CLOCK signal. The I/O CLOCK serves dual roles: it times serial data transfer (address input and result output) and triggers internal sampling and conversion events - including initiating sampling on the fourth falling edge and starting conversion after the final falling edge. No separate master clock generator is needed.

How does the TLV2543CDBRG4 handle analog input channel selection?

The TLV2543CDBRG4 selects analog input channels via a 4-bit address (D7–D4) sent during the first four rising edges of I/O CLOCK. Valid addresses 0000–1010 (hex 0–A) route AIN0 through AIN10 respectively; addresses 1011–1101 select internal self-test voltages; and 1110 activates power-down mode. The multiplexer is break-before-make to minimize crosstalk between channels during switching.

Can the TLV2543CDBRG4 operate with a 3.3-V supply?

Yes, the TLV2543CDBRG4 supports 3.3-V operation - its specified supply voltage range is 2.7 V to 5.25 V per TI documentation. At 3.3 V, REF+ can be tied to VCC for unipolar operation, and REF– to GND; the device maintains full 12-bit performance, 10-µs conversion time, and ±1 LSB linearity. Logic levels remain compatible with 3.3-V microcontrollers when interfaced via CS, DATA INPUT, DATA OUT, and I/O CLOCK.

What is the function of the EOC pin on the TLV2543CDBRG4?

The EOC (End-of-Conversion) pin on the TLV2543CDBRG4 is an active-low status signal indicating conversion progress: it goes low after the last falling edge of I/O CLOCK to mark the start of the conversion cycle, and returns high when conversion is complete and the 12-bit result is latched into the output register. This signal enables interrupt-driven data reads and precise synchronization with host processor timing, eliminating the need for polling or fixed delays.