Texas Instruments TLV1543CN

Overview

TLV1543CN from Texas Instruments is a 10-bit CMOS successive-approximation analog-to-digital converter with 11 analog input channels, on-chip sample-and-hold, and 3-state serial interface. It operates from a 3.3-V supply, delivers ±1 LSB total unadjusted error, and features an integrated system clock and end-of-conversion (EOC) output for microcontroller interfacing in embedded data acquisition systems.

For engineers reviewing the TLV1543CN datasheet, TLV1543CN pinout, TLV1543CN application, or TLV1543CN equivalent, this page provides verified technical context, validated pin functions, confirmed self-test modes, exact timing parameters (21 µs conversion time), and real-world interface constraints including 10-bit serial data transfer with address-driven channel selection.

Technical Context

The TLV1543CN implements a switched-capacitor successive-approximation architecture with a 14-channel analog multiplexer selecting among 11 external inputs or three internal self-test voltages. Its 4-wire serial interface uses CS, I/O CLOCK, ADDRESS, and DATA OUT to enable direct connection to microcontroller SPI peripherals without external logic.

Conversion begins on the 10th falling edge of I/O CLOCK, with sampling active for six clock periods and hold initiated at that edge. The device supports six timing modes-including fast (10-clock) and slow (11–16-clock) transfers-with EOC signaling completion and DATA OUT synchronized to either CS falling edge or EOC rising edge depending on mode.

Key Specifications

Pinout & Package

TLV1543CN is supplied in a 20-pin plastic DIP (N) package with 0.3-inch body width and through-hole mounting.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC1543CN, TLV1543CN adds 3.3-V compatibility and lower power; compared with ADS7822U, it integrates multiplexer and self-test but trades off resolution and external clock flexibility-making TLV1543CN optimal for cost-sensitive, self-contained 10-bit data acquisition.

Availability

TLV1543CN is available at Aetrix Electronics and suitable for industrial sensor monitoring, automotive body control units, medical vital sign loggers, and energy meter front-end applications requiring stable component supply and long-term production continuity.

Supply support for TLV1543CN 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 precision data converter innovation.

The TLV1543CN belongs to TI's TLV1543 family of low-power, serial 10-bit ADCs designed for embedded systems where integration, supply flexibility, and diagnostic capability are critical in space-constrained, cost-sensitive applications.

FAQ

What is the maximum sampling rate achievable with the TLV1543CN?

The TLV1543CN has a guaranteed conversion time of 21 µs. With minimal inter-conversion overhead, sustained throughput reaches approximately 47.6 kSPS. Real-world rate depends on host processor serial interface speed and selected timing mode-fast 10-clock mode yields highest effective rate. TLV1543CN maintains this performance across its full 0°C to 70°C operating range.

Does the TLV1543CN require an external sample-and-hold circuit?

No, the TLV1543CN incorporates inherent sample-and-hold functionality. Sampling occurs automatically during clock cycles 4 through 9, and the hold phase begins precisely on the 10th falling edge of I/O CLOCK. This eliminates external components, reduces board area, and ensures timing coherence between sampling aperture and conversion start-critical for accurate multi-channel acquisition in TLV1543CN-based systems.

How does the self-test functionality work in the TLV1543CN?

The TLV1543CN provides three internal self-test voltages selectable via ADDRESS bits 1011 (B), 1100 (C), and 1101 (D). These correspond to Vref−, (Vref+ − Vref−)/2, and Vref+, producing ideal output codes of 000h, 200h, and 3FFh respectively. This allows firmware to verify ADC linearity, zero/full-scale response, and reference integrity without external test equipment-enabling automated diagnostics during TLV1543CN power-up or periodic health checks.

Can the TLV1543CN operate with a 5-V supply?

Yes, the TLV1543CN supports VCC from 3 V to 5.5 V per its recommended operating conditions. At 5 V, it delivers improved noise margin and full compatibility with legacy 5-V logic families while maintaining ±1 LSB total unadjusted error and 21 µs conversion time. All control inputs (CS, ADDRESS, I/O CLOCK) are 5-V tolerant, and DATA OUT drives to valid VOH/VOL levels-making TLV1543CN suitable for mixed-voltage systems without level shifters.

What is the purpose of the EOC pin on the TLV1543CN?

The EOC (end-of-conversion) pin on the TLV1543CN is an active-low, open-drain output that transitions low on the 10th falling edge of I/O CLOCK and returns high once conversion is complete and the 10-bit result is latched and ready for serial readout. It enables interrupt-driven data capture in microcontrollers, eliminating polling delays and improving system efficiency-especially critical in real-time TLV1543CN applications like motor control feedback loops or sensor fusion algorithms.