Texas Instruments TLV1543CFN

Overview

TLV1543CFN 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 3.3-V supply operation. It features ±1 LSB total unadjusted error, end-of-conversion (EOC) output, and pin compatibility with TLC1543 for industrial data acquisition systems.

For engineers reviewing the TLV1543CFN datasheet, TLV1543CFN pinout, TLV1543CFN application, or TLV1543CFN equivalent, key selection considerations include its 3.3-V operation, 11-channel multiplexer, self-test modes, serial 4-wire interface timing flexibility, and FN-package thermal performance across 0°C to 70°C.

Technical Context

The TLV1543CFN implements a switched-capacitor SAR architecture with an integrated 14-channel analog multiplexer selecting among 11 external inputs or three internal self-test voltages. Its automatic sample-and-hold initiates sampling on the fourth I/O CLOCK falling edge and holds on the tenth.

Control logic supports six serial interface timing modes-fast (10-clock) and slow (11–16-clock)-with CS-active or CS-inactive cycling. The device uses differential high-impedance reference inputs (REF+, REF−) enabling ratiometric conversion and isolation from supply noise.

Key Specifications

Pinout & Package

TLV1543CFN is supplied in a 20-pin plastic chip carrier (FN) package with gull-wing leads, designed for surface-mount assembly and thermal reliability in compact PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC1543CN, TLV1543CFN enables direct 3.3-V system integration without level shifters; versus ADS7822U, it trades resolution for integrated diagnostics, multiplexing, and supply flexibility-making it optimal for cost-sensitive, self-validating industrial data loggers.

Availability

TLV1543CFN is available at Aetrix Electronics and suitable for industrial sensor monitoring, automotive body control units, medical diagnostic equipment, and energy metering front-ends requiring stable component supply and long-term manufacturability.

Supply support for TLV1543CFN 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 TLV1543CFN belongs to TI's legacy precision ADC family designed for cost-effective, self-testing data acquisition in commercial-temperature industrial and instrumentation applications.

FAQ

What is the operating temperature range for the TLV1543CFN?

The TLV1543CFN is characterized for operation from 0°C to 70°C (commercial grade). This range is explicitly defined in the SLAS072E datasheet under "AVAILABLE OPTIONS" and confirmed in the Absolute Maximum Ratings and Recommended Operating Conditions tables. It is not rated for industrial (−40°C to 85°C) or military (−55°C to 125°C) temperatures - those ranges apply to TLV1543I and TLV1543M variants respectively.

Does the TLV1543CFN require an external clock source?

No, the TLV1543CFN incorporates an on-chip system clock and does not require an external clock generator. Its operation is synchronized to the externally supplied I/O CLOCK signal, which controls address latching, sampling timing, and data shifting. The internal clock derives timing from I/O CLOCK edges, eliminating need for separate oscillator circuitry - a key feature confirmed in the Functional Block Diagram and Detailed Description sections of the SLAS072E datasheet.

How many analog input channels does the TLV1543CFN support?

The TLV1543CFN supports 11 dedicated analog input channels (A0 through A10), as stated in the headline features and verified in Table 2 ("Analog-Channel-Select Address") of the SLAS072E datasheet. These are supplemented by three internal self-test voltage inputs (Vref−, Vref+, Vref−/2), giving a total of 14 selectable inputs via the 4-bit ADDRESS bus - but only A0–A10 are external analog signal terminals.

Is the TLV1543CFN pin-compatible with the TLC1543?

Yes, the TLV1543CFN is explicitly pin-compatible with the TLC1543, as stated in the datasheet's headline features and confirmed in the "AVAILABLE OPTIONS" table where both share the FN package designation. Pin functions, numbering, and electrical behavior (including CS, I/O CLOCK, ADDRESS, DATA OUT, EOC, REF+, REF−, VCC, GND, and A0–A10) match identically - enabling drop-in replacement in existing TLC1543 designs operating within the 0°C to 70°C range and 3.3-V supply constraints.

What self-test modes are available on the TLV1543CFN?

The TLV1543CFN provides three built-in self-test modes accessed via ADDRESS bits: Vref− (output code 0x000), Vref+ (output code 0x3FF), and Vref−/2 (output code 0x200). These are documented in Table 3 ("Test-Mode-Select Address") and referenced in the Electrical Characteristics table (self-test output codes). Each mode applies a known internal voltage to the ADC input path, enabling firmware-level validation of conversion integrity without external stimulus.