Texas Instruments TLV2543CDW

Overview

TLV2543CDW 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 0°C to 70°C, ±1 LSB linearity error, and supports unipolar/bipolar output formats. Used in industrial sensor data acquisition systems requiring precise, low-noise digitization of multiple analog signals.

For engineers reviewing the TLV2543CDW datasheet, TLV2543CDW pinout, TLV2543CDW application, or TLV2543CDW equivalent, key selection considerations include its 12-bit resolution, 11 analog inputs with internal 14-channel mux, programmable MSB/LSB-first output, ratiometric reference architecture, and CMOS-compatible serial control via CS/I/O CLOCK/DATA INPUT.

Technical Context

The TLV2543CDW implements a switched-capacitor successive-approximation ADC core synchronized to an external I/O CLOCK, enabling precise timing control of sampling and conversion. Its internal 14-channel analog multiplexer selects among 11 external analog inputs or three internal test voltages, with break-before-make switching to minimize crosstalk.

Conversion operation separates into two phases: an externally clocked I/O cycle (8/12/16 clocks) for address/control input and previous-result output, followed by an internal conversion cycle triggered after the final I/O CLOCK falling edge. The EOC signal transitions low at conversion start and high upon result latching, providing deterministic timing for host synchronization.

Key Specifications

Pinout & Package

The TLV2543CDW is housed in a 20-pin SOIC (DW) package with 0.300-inch body width and standard JEDEC MS-013 outline.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV2543CDW, ADS7822U trades resolution and channel count for lower cost and simpler integration, while TLV2548CDW offers identical resolution in the same package but omits three analog inputs and all self-test functionality - neither is a drop-in replacement, and both require firmware and layout adjustments.

Availability

TLV2543CDW is available at Aetrix Electronics and suitable for industrial process monitoring, automotive sensor interface, and medical instrumentation requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for TLV2543CDW 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 TLV2543CDW belongs to TI's legacy precision ADC product line designed for high-reliability, multi-channel data acquisition in industrial, automotive, and medical systems where deterministic timing and ratiometric accuracy are essential.

FAQ

What is the operating temperature range for the TLV2543CDW?

The TLV2543CDW is characterized for operation from 0°C to 70°C ambient temperature. This commercial-grade specification aligns with its "C" suffix designation and makes it suitable for indoor industrial controls, test equipment, and consumer electronics where extended temperature performance is not required. The TLV2543CDW maintains guaranteed 10-µs conversion time and ±1 LSB linearity across this full range.

Does the TLV2543CDW require an external clock source?

No, the TLV2543CDW does not require an external clock source for conversion - it incorporates an on-chip system clock synchronized to the externally supplied I/O CLOCK signal. The I/O CLOCK (applied to Pin 18) serves solely as the serial interface timing reference and triggers sampling and conversion sequencing; the actual conversion timing is internally managed and guarantees 10-µs latency regardless of I/O CLOCK frequency within specified limits.

How many analog input channels does the TLV2543CDW support?

The TLV2543CDW supports 11 dedicated analog input channels (AIN0 through AIN10), selected via a 4-bit address in the serial input stream. Its internal 14-channel analog multiplexer also provides access to three internal self-test voltages (Vref+, Vref–, and (Vref+−Vref–)/2), but only 11 pins are brought out to package terminals. All 11 external inputs are single-ended and share the same reference structure.

Can the TLV2543CDW operate with a 3.3-V supply?

Yes, the TLV2543CDW operates over a supply voltage range of 2.7 V to 5.5 V, fully supporting 3.3-V systems. At 3.3 V, it maintains full 12-bit performance, including 10-µs conversion time and ±1 LSB linearity, provided that REF+ and REF– are properly biased and analog input source impedance remains ≤50 Ω. The device's CMOS design ensures robust logic-level compatibility with 3.3-V microcontrollers.

What is the purpose of the EOC pin on the TLV2543CDW?

The EOC (End-of-Conversion) pin on the TLV2543CDW is an active-low open-drain output that signals conversion status: it goes low after the final I/O CLOCK falling edge to indicate the start of conversion, and returns high when the 12-bit result is latched and ready for serial readout. This provides precise hardware handshaking for microcontrollers, eliminating the need for software polling or fixed delay loops and ensuring deterministic timing in real-time acquisition systems.