Texas Instruments TLV2544CPW

Overview

TLV2544CPW from Texas Instruments is a 12-bit, 200-KSPS successive-approximation analog-to-digital converter (ADC) with integrated reference, conversion clock, and 8-word FIFO. It operates from a single 2.7-V to 5.5-V supply, supports SPI/DSP-compatible serial interface (CPOL = 0, CPHA = 0), and delivers ±1 LSB differential/integral nonlinearity with 70 dB SNR at 12 kHz for precision data acquisition in industrial sensor interfaces.

For engineers reviewing the TLV2544CPW datasheet, TLV2544CPW pinout, TLV2544CPW application, or TLV2544CPW equivalent, key selection considerations include its 4-channel analog multiplexer, programmable sampling period (12/24 SCLKs), hardware/software power-down (1 µA max), extended sampling via CSTART pin, and TSSOP-16 package compatibility with space-constrained embedded systems.

Technical Context

The TLV2544CPW implements a charge-redistribution SAR architecture with break-before-make analog multiplexer for 4-channel input selection and three internal self-test voltages. Its configurable conversion clock supports internal OSC, SCLK, SCLK/2, or SCLK/4 - enabling conversion times as low as 3.86 µs (with internal OSC) or scalable timing up to 20 MHz SCLK.

It features dual-mode operation: normal sampling (triggered by CS or FS) and extended sampling (asynchronous CSTART control), with four conversion modes (one-shot, repeat, sweep, repeat-sweep) and FIFO-triggered interrupt generation. The EOC/INT pin is software-configurable, and reference selection (internal 2 V/4 V or external) is controlled via CFR bit D11.

Key Specifications

Pinout & Package

TLV2544CPW is housed in a 16-pin TSSOP (PW) package with 0.65 mm pitch, JEDEC MO-153 compliant, and rated for 0°C to 70°C operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit SAR ADC applications.

Compared with TLV2544CPW, ADS7822U trades resolution and integration for lower unit cost, while TLV2548CPW offers immediate channel scalability within identical footprint and firmware compatibility - making it the preferred migration path for evolving sensor count requirements.

Availability

TLV2544CPW is available at Aetrix Electronics and suitable for industrial sensor interfaces, motor control feedback systems, and portable data loggers requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TLV2544CPW 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 focused on analog and embedded processing technologies, with decades of expertise in precision data converters and industrial-grade IC design.

The TLV2544CPW belongs to TI's TLV254x family of low-power, high-performance SAR ADCs engineered specifically for cost-sensitive, space-constrained industrial and instrumentation applications demanding integrated references and flexible serial interfacing.

FAQ

What is the maximum SCLK frequency supported by the TLV2544CPW?

The TLV2544CPW supports SCLK up to 20 MHz for serial communication. When using SCLK as the conversion clock source (CFR bits D8–D7 = 01), this enables the fastest possible conversion time. At 20 MHz SCLK, the minimum conversion time is 14 × 1 / 20 MHz = 700 ns, though total cycle time includes sampling and interface overhead. The device maintains reliable SPI timing margins across the full 2.7–5.5 V supply range.

Does the TLV2544CPW require an external reference, or does it have an internal one?

The TLV2544CPW includes a built-in reference selectable between 2 V and 4 V (via CFR bit D10), eliminating the need for external reference components in most applications. When using the internal reference, REFM must be tied to analog ground. An external reference can also be applied differentially between REFP and REFM for higher accuracy or custom voltage scaling - selected via CFR bit D11.

How many analog input channels does the TLV2544CPW support?

The TLV2544CPW supports four single-ended analog input channels (A0–A3), as confirmed by its pinout, functional block diagram, and command set table. Unlike the TLV2548CPW (which has eight channels), the TLV2544CPW's 16-pin TSSOP package allocates pins exclusively for A0–A3, with no provision for A4–A7. This 4-channel configuration is fixed and cannot be expanded via configuration.

What is the purpose of the CSTART pin on the TLV2544CPW?

The CSTART pin on the TLV2544CPW provides hardware-controlled extended sampling: its falling edge initiates sampling, and its rising edge terminates sampling and starts conversion - fully asynchronous to SCLK. This is essential for high-impedance sources (>1 kΩ) or when precise control over aperture time is required. CSTART operation requires internal reference selection and is supported in repeat, sweep, and repeat-sweep modes.

Can the TLV2544CPW operate in a FIFO-based burst acquisition mode?

Yes, the TLV2544CPW includes an 8-word FIFO and supports FIFO-based burst acquisition in repeat, sweep, and repeat-sweep conversion modes. When the FIFO reaches a user-programmed threshold (1/4, 1/2, 3/4, or full), the EOC/INT pin asserts to signal ready data. A FIFO read command retrieves all stored results sequentially, reducing host processor polling overhead and enabling deterministic data capture timing.