Texas Instruments TLV1543CDWR

Overview

TLV1543CDWR 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 internal system clock and EOC output for timing-critical embedded data acquisition.

For engineers reviewing the TLV1543CDWR datasheet, TLV1543CDWR pinout, TLV1543CDWR application, or TLV1543CDWR equivalent, this device supports high-speed serial interfacing with microcontrollers via CS/I/O CLOCK/ADDRESS/DATA OUT, enables ratiometric conversion using differential REF+/REF− inputs, and provides built-in self-test modes for production validation and field diagnostics.

Technical Context

The TLV1543CDWR implements a switched-capacitor SAR architecture with a 14-channel analog multiplexer selecting among 11 external inputs or three internal test voltages. Its automatic sample-and-hold initiates sampling on the fourth I/O CLOCK falling edge and holds on the tenth, enabling precise timing control in host-synchronized systems.

It uses a 4-wire serial interface with MSB-first address loading (4 bits), 10-bit data output, and configurable timing modes - including fast (10-clock) and slow (11–16-clock) transfers - with EOC signaling conversion completion and DATA OUT driven only during active CS low periods.

Key Specifications

Pinout & Package

TLV1543CDWR is housed in a 20-pin SOIC (DW) package with 0.300-inch body width and standard JEDEC outline. Pin functions are electrically and mechanically defined per TI SLAS072E datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC1543CN, TLV1543CDWR enables direct 3.3-V integration and lower power; versus ADS7822U, it offers integrated 11-channel multiplexing at 10-bit precision, reducing BOM count and layout complexity in multi-sensor systems.

Availability

TLV1543CDWR is available at Aetrix Electronics and suitable for industrial sensor interface, automated test equipment, medical instrumentation, and energy metering front-end applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TLV1543CDWR 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 TLV1543CDWR belongs to TI's legacy precision ADC family designed for cost-sensitive, multi-channel data acquisition in commercial and industrial environments where reliability, ease of interface, and self-test capability are prioritized.

FAQ

What is the maximum recommended I/O CLOCK frequency for TLV1543CDWR?

The TLV1543CDWR supports up to 1.1 MHz I/O CLOCK frequency across its specified operating temperature range (0°C to 70°C). This limit ensures reliable address latching, sampling, and data transfer timing per the SLAS072E datasheet. Exceeding 1.1 MHz may cause setup/hold violations or incomplete conversions, especially at temperature extremes or with marginal PCB layout. The device remains functional at lower frequencies down to DC, supporting ultra-low-power polling schemes.

Does TLV1543CDWR require an external sample-and-hold circuit?

No, TLV1543CDWR does not require an external sample-and-hold circuit. It incorporates an inherent sample-and-hold function that automatically acquires the analog input over six I/O CLOCK periods (from the fourth to the tenth falling edge) and holds the sampled value for conversion. This integrated capability eliminates external components, reduces board space, and ensures timing consistency - a key design advantage confirmed in the functional block diagram and timing figures of the TLV1543CDWR datasheet.

How many analog input channels does TLV1543CDWR support, and how are they selected?

The TLV1543CDWR supports 11 analog input channels (A0 through A10), selected via a 4-bit serial address applied to the ADDRESS pin. The address is loaded MSB-first on the first four rising edges of I/O CLOCK and maps directly to channels: 0x0 → A0, 0x1 → A1, ..., 0xA → A10. Channels A0–A10 are single-ended; no differential input pairs are supported. Selection occurs before each conversion cycle and is fully software-controllable through the host microcontroller's serial interface.

Can TLV1543CDWR operate with a 2.5-V reference voltage?

Yes, TLV1543CDWR can operate with a 2.5-V reference voltage applied between REF+ and REF−, provided VCC is ≥3 V and the differential reference voltage (Vref+ − Vref−) stays within 2.5 V to VCC (per recommended operating conditions). Using 2.5 V improves resolution for low-voltage sensors while maintaining full 10-bit linearity. However, the absolute reference inputs must remain within VCC + 0.1 V (REF+) and −0.1 V (REF−), and the analog input range becomes 0 V to 2.5 V - verified in both electrical characteristics and parameter measurement sections of the TLV1543CDWR datasheet.

Is TLV1543CDWR pin-compatible with any other Texas Instruments ADCs?

Yes, TLV1543CDWR is explicitly pin-compatible with the TLC1543 series (e.g., TLC1543CN), sharing identical pinout, terminal functions, and serial interface protocol. This allows direct PCB-level replacement in existing designs without layout changes. Differences include supply voltage range (TLV1543CDWR: 3–5.5 V; TLC1543: 4.5–5.5 V) and temperature grade (TLV1543CDWR-C: 0°C to 70°C), making TLV1543CDWR a drop-in upgrade for 3.3-V systems seeking lower power and broader supply flexibility.