Texas Instruments TLV1543IDBRG4

Overview

TLV1543IDBRG4 from Texas Instruments is a 10-bit successive-approximation analog-to-digital converter (ADC) 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 end-of-conversion (EOC) output for precise timing control in embedded data acquisition systems.

For engineers reviewing the TLV1543IDBRG4 datasheet, TLV1543IDBRG4 pinout, TLV1543IDBRG4 application, or TLV1543IDBRG4 equivalent, this device supports high-speed 4-wire SPI-compatible communication, ratiometric conversion via differential reference inputs (REF+/REF−), and built-in self-test modes for system diagnostics - critical for industrial sensor interfaces and motor control feedback loops.

Technical Context

The TLV1543IDBRG4 implements a switched-capacitor SAR architecture with an integrated 14-channel analog multiplexer (11 external + 3 internal test inputs), automatic sampling triggered on the fourth I/O CLOCK falling edge, and hold initiated on the tenth falling edge. Its CMOS design enables low-error performance across −40°C to 85°C.

It uses a 4-bit serial address (MSB-first) to select input channels, outputs 10-bit conversion results MSB-first on DATA OUT synchronized to I/O CLOCK, and asserts EOC low after the tenth clock falling edge - indicating result readiness. Reference inputs support ratiometric operation with Vref+ = VCC and Vref− = GND.

Key Specifications

Pinout & Package

TLV1543IDBRG4 is housed in a 20-pin Small Outline (SOIC) package (DB suffix), with 0.300-inch body width and standard gull-wing lead form. Pin numbering follows JEDEC MS-012AC, top-view orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC1543CDW and ADS7822U, TLV1543IDBRG4 uniquely balances 11-channel flexibility, 3.3-V native operation, built-in diagnostics, and industrial temperature rating - making it optimal for cost-sensitive, space-constrained embedded systems requiring verified ADC integrity.

Availability

TLV1543IDBRG4 is available at Aetrix Electronics and suitable for industrial automation, motor control, and energy metering applications requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for TLV1543IDBRG4 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 TLV1543IDBRG4 belongs to TI's legacy precision ADC family designed specifically for robust, low-power, multi-channel data acquisition in harsh industrial environments - emphasizing reliability, ease of integration, and diagnostic capability.

FAQ

What is the operating temperature range for TLV1543IDBRG4?

The TLV1543IDBRG4 is rated for industrial operation from −40°C to +85°C. This range is confirmed in the "Available Options" table and "Recommended Operating Conditions" section of the SLAS072E datasheet. It is the "I" grade variant, distinct from the commercial (C) and military (M) versions. The DB package supports this full industrial range without derating.

Does TLV1543IDBRG4 require an external clock source?

No, TLV1543IDBRG4 includes an on-chip system clock and requires only the external I/O CLOCK signal for serial interface timing. The internal clock handles conversion sequencing and state control; the I/O CLOCK synchronizes address loading, sampling, and data output - eliminating need for external crystal or oscillator circuits.

How many analog input channels does TLV1543IDBRG4 support?

TLV1543IDBRG4 supports 11 dedicated analog input channels (A0 through A10), plus three internal self-test voltage sources (Vref+, Vref−, and Vref+/2), selectable via the 4-bit ADDRESS input. The 14-channel multiplexer is explicitly documented in the functional block diagram and Table 2 of the SLAS072E datasheet.

Is TLV1543IDBRG4 pin-compatible with other devices in its family?

Yes, TLV1543IDBRG4 is pin-compatible with the TLC1543 in the same DB or DW package, as stated in the datasheet: "Pin Compatible With TLC1543". This applies to all signal and power pins (including EOC, REF+, REF−, and serial interface lines), enabling direct replacement in existing layouts without redesign.

What is the maximum supported I/O CLOCK frequency for TLV1543IDBRG4?

The maximum I/O CLOCK frequency for TLV1543IDBRG4 is 1.1 MHz, as specified in the "Recommended Operating Conditions" table for the "I" grade (−40°C to 85°C). This limit ensures reliable address capture, sampling, and data transfer timing across the full industrial temperature range.