Texas Instruments TLV1543CDWRG4

Overview

TLV1543CDWRG4 from Texas Instruments is a 10-bit CMOS successive-approximation analog-to-digital converter with 11 analog input channels, on-chip 14-channel multiplexer, inherent sample-and-hold, and 3.3-V supply operation. It delivers ±1 LSB max total unadjusted error, supports serial 4-wire interface (CS/I/O CLOCK/ADDRESS/DATA OUT), and targets embedded data acquisition in industrial sensors and motor control feedback loops.

For engineers reviewing the TLV1543CDWRG4 datasheet, TLV1543CDWRG4 pinout, TLV1543CDWRG4 application, or TLV1543CDWRG4 equivalent, this page provides verified technical context, validated pin functions, confirmed self-test modes, exact timing parameters for 10- to 16-clock transfers, and real-world design implications of its ratiometric reference architecture and EOC signaling.

Technical Context

The TLV1543CDWRG4 implements a switched-capacitor SAR ADC core with differential high-impedance REF+ and REF− inputs enabling ratiometric conversion and noise isolation. Its internal 14-channel analog multiplexer selects among 11 external analog inputs (A0–A10) or three internal self-test voltages (Vref−, Vref+, Vref−/2), with break-before-make switching to suppress channel crosstalk.

Control logic synchronizes sampling, conversion, and serial output using a 4-bit address register clocked on the first four rising edges of I/O CLOCK, followed by six sampling clocks and a tenth-edge hold trigger. End-of-conversion (EOC) asserts low on the tenth I/O CLOCK falling edge and remains low until data is ready, supporting six distinct serial interface timing modes including fast (10-clock) and slow (11–16-clock) configurations with CS toggling or continuous assertion.

Key Specifications

Pinout & Package

TLV1543CDWRG4 uses a 20-pin SOIC (DW) package with 0.300-inch body width and standard JEDEC MS-013AC footprint. Pin numbering follows top-view orientation with pin 1 at bottom-left corner.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit serial ADC applications.

Compared with TLC1543CN, TLV1543CDWRG4 offers lower power, guaranteed 3.3-V operation, and diagnostic capability; versus ADS7822U, it trades resolution for integrated 11-channel MUX and self-test-making it optimal for cost-sensitive, multi-sensor industrial nodes where functional safety validation matters.

Availability

TLV1543CDWRG4 is available at Aetrix Electronics and suitable for industrial sensor monitoring, motor control feedback, embedded data loggers, and power supply monitoring requiring stable component supply across extended product lifecycles.

Supply support for TLV1543CDWRG4 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 TLV1543CDWRG4 belongs to TI's legacy precision ADC portfolio designed specifically for cost-effective, multi-channel data acquisition in industrial automation, motor control, and sensor interface applications where reliability, self-test capability, and 3.3-V compatibility are essential.

FAQ

What is the operating temperature range for the TLV1543CDWRG4?

The TLV1543CDWRG4 is characterized for operation from 0°C to 70°C (commercial grade). This range is explicitly defined in the SLAS072E datasheet for the 'C' suffix variant and applies to all electrical specifications unless otherwise noted. It is not rated for industrial (−40°C to 85°C) or military (−55°C to 125°C) temperature ranges - those require TLV1543I or TLV1543M variants respectively. The TLV1543CDWRG4 maintains ±1 LSB total unadjusted error across this full 0°C–70°C span.

Does the TLV1543CDWRG4 require an external clock source?

No, the TLV1543CDWRG4 does not require an external clock source. It incorporates an on-chip system clock that drives the internal SAR conversion process. The only external timing signal needed is the I/O CLOCK provided by the host processor for serial communication - this controls address loading, sampling window timing, and data shifting. The internal clock ensures deterministic conversion timing independent of host clock stability, and the device operates correctly with I/O CLOCK frequencies up to 1.1 MHz for the TLV1543C grade.

How does the self-test functionality work on the TLV1543CDWRG4?

The TLV1543CDWRG4 provides three internal self-test voltages selectable via the 4-bit ADDRESS input: Vref− (output code 0x000), Vref+ (output code 0x3FF), and Vref−/2 (output code 0x200). When the corresponding address (1100b, 1101b, or 1011b) is loaded, the internal multiplexer routes that reference to the ADC core and performs a full conversion. These known outputs verify linearity, zero/full-scale accuracy, and basic functionality without external stimulus - critical for pre-deployment validation or periodic health checks in safety-aware systems using the TLV1543CDWRG4.

Can the TLV1543CDWRG4 interface directly with a 3.3-V microcontroller SPI port?

Yes, the TLV1543CDWRG4 interfaces directly with 3.3-V microcontroller SPI ports. Its control inputs (CS, ADDRESS, I/O CLOCK) accept VIH ≥ 2.0 V and VIL ≤ 0.6 V at VCC = 3.3 V, matching standard 3.3-V logic thresholds. Its DATA OUT and EOC outputs drive VOH ≥ 2.4 V (at IOH = −1.6 mA) and VOL ≤ 0.4 V (at IOL = 1.6 mA), satisfying 3.3-V MCU input requirements. No level-shifting circuitry is needed - the TLV1543CDWRG4 is fully compatible with MSP430, TM4C, and STM32 families operating at 3.3 V.

What is the purpose of the EOC pin on the TLV1543CDWRG4?

The EOC (End-of-Conversion) pin on the TLV1543CDWRG4 is an active-low, open-drain status signal that indicates when conversion data is valid and ready for serial readback. It transitions low on the falling edge of the tenth I/O CLOCK pulse and remains low until the conversion completes and the result is latched into the output register. Host processors use EOC to synchronize data reads - either polling the pin or configuring an interrupt - ensuring reliable capture of the 10-bit result without timing guesswork. This eliminates need for fixed-delay software waits in firmware driving the TLV1543CDWRG4.