Texas Instruments TLV2544CPWR

Overview

TLV2544CPWR from Texas Instruments is a 12-bit, 200-KSPS successive-approximation analog-to-digital converter (ADC) with integrated reference, conversion clock, and 8× FIFO. It operates from a single 2.7-V to 5.5-V supply, supports SPI (CPOL = 0, CPHA = 0)/DSP serial interfaces up to 20 MHz, and features hardware- or software-controllable sampling for precision data acquisition in industrial sensor interfaces.

For engineers reviewing the TLV2544CPWR datasheet, TLV2544CPWR pinout, TLV2544CPWR application, or TLV2544CPWR equivalent, key selection considerations include its 4-channel analog multiplexer, ±1 LSB differential/integral nonlinearity, 70 dB SNDR at 12 kHz, programmable sweep modes, and low-power operation (1.0 mA at 3.3 V, 1 µA in power-down).

Technical Context

The TLV2544CPWR implements a charge redistribution SAR architecture with break-before-make analog multiplexing across four input channels (A0–A3). Its internal 4-V or 2-V reference can be bypassed for external reference use, and conversion timing is configurable via internal OSC, SCLK, SCLK/2, or SCLK/4 - enabling conversion times as fast as 3.86 µs (internal OSC) or 2.8 µs (20-MHz SCLK).

Sampling is flexibly controlled: normal mode uses 12 or 24 SCLK cycles; extended mode uses the dedicated CSTART pin for asynchronous, user-defined sampling periods independent of SCLK. The device supports four conversion modes (one-shot, repeat, sweep, repeat-sweep), all leveraging its 12-bit × 8 FIFO and EOC/INT pin programmability for host synchronization.

Key Specifications

Pinout & Package

TSSOP-16 (PW) package: 5-mm × 4.4-mm body, 0.65-mm pitch, surface-mount, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7822U and MCP3204-I/P, the TLV2544CPWR uniquely combines 12-bit accuracy, integrated reference, 200-KSPS throughput, 8× FIFO, and CSTART-triggered sampling - making it optimal for resource-constrained, high-fidelity embedded data acquisition where flexibility and power efficiency are critical.

Availability

TLV2544CPWR is available at Aetrix Electronics and suitable for industrial sensor interfaces, motor control feedback systems, portable data loggers, and energy metering front-ends requiring stable component supply and long-term production continuity.

Supply support for TLV2544CPWR 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 power management technologies, with decades of expertise in precision data converters and industrial-grade IC design.

The TLV2544CPWR belongs to TI's TLV254x family of low-power, high-performance SAR ADCs engineered for embedded industrial sensing, motor control, and portable instrumentation where accuracy, integration, and power efficiency are essential.

FAQ

What is the maximum sampling rate supported by the TLV2544CPWR?

The TLV2544CPWR achieves a maximum throughput of 200 KSPS under optimal conditions - specifically when using the internal oscillator as the conversion clock and operating in one-shot mode with short sampling. This rate is sustained across its full 2.7-V to 5.5-V supply range and 0°C to 70°C temperature grade, making TLV2544CPWR suitable for real-time control loop sampling in industrial automation systems.

Does the TLV2544CPWR require an external reference voltage?

No, the TLV2544CPWR does not require an external reference voltage. It integrates selectable 2-V or 4-V internal references, configured via CFR bit D11/D10. When using the internal reference, REFM must be tied to analog ground. An external reference may be applied between REFP and REFM for enhanced accuracy or custom voltage scaling - but this is optional, not mandatory, for TLV2544CPWR operation.

How many analog input channels does the TLV2544CPWR support?

The TLV2544CPWR supports four single-ended analog input channels (A0 through A3), as confirmed by its pinout (Pins 6–9), functional block diagram, and command set documentation. Unlike the TLV2548 variant, the TLV2544CPWR lacks A4–A7 pins and corresponding channel select commands - its multiplexer is strictly 4-channel, matching the device's 16-pin TSSOP package constraints.

Can the TLV2544CPWR operate with a 3.3-V microcontroller SPI interface?

Yes, the TLV2544CPWR is fully compatible with 3.3-V microcontroller SPI interfaces. Its digital I/Os are 5-V tolerant and operate down to 2.7 V, supporting CPOL = 0 and CPHA = 0 timing. With VCC = 3.3 V, it draws only 1.0 mA active current and maintains full 20-MHz SCLK capability - ensuring robust, low-power communication with ARM Cortex-M0/M3 or RISC-V MCUs without level shifters.

What is the purpose of the CSTART pin on the TLV2544CPWR?

The CSTART pin on the TLV2544CPWR provides hardware-controlled, asynchronous sampling initiation - independent of SCLK timing. Its falling edge starts the sampling period; its rising edge ends sampling and triggers conversion. This enables precise control over aperture time for high-impedance sources (e.g., thermistors), eliminates SCLK jitter impact, and supports deterministic timing in safety-critical applications - a capability not available in most competing 12-bit ADCs.