Texas Instruments TLV2544IPW

Overview

TLV2544IPW 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 for precision data acquisition in industrial sensor interfaces.

For engineers reviewing the TLV2544IPW datasheet, TLV2544IPW pinout, TLV2544IPW application, or TLV2544IPW equivalent, key selection considerations include its 4-channel analog multiplexer, programmable sampling period (12/24 SCLKs), hardware/software power-down modes (1 µA max), and support for extended sampling via dedicated CSTART pin in embedded control and test equipment designs.

Technical Context

The TLV2544IPW 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 source (internal OSC, SCLK, SCLK/2, or SCLK/4) enables timing flexibility up to 20-MHz SCLK operation and sub-4-µs conversion time when using external clocking.

It features dual-mode EOC/INT pin functionality, programmable sweep sequences (0–1–2–3), FIFO-triggered interrupt levels (1/4 to full), and hardware-controlled sampling initiation via CSTART - all managed through a 12-bit configuration register (CFR) retained across power-down states.

Key Specifications

Pinout & Package

TLV2544IPW is packaged in a 16-pin TSSOP (PW) with 0.65-mm pitch, RoHS-compliant, and rated for −40°C to +85°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV2544IPW, ADS7822U sacrifices resolution and integration for lower unit cost, while TLV2548IPW provides immediate channel expansion with zero PCB or firmware changes - making it the preferred migration path for scalable sensor nodes.

Availability

TLV2544IPW is available at Aetrix Electronics and suitable for industrial automation, motor control, and portable instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLV2544IPW 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 TLV2544IPW belongs to TI's TLV254x family of low-power, high-performance SAR ADCs engineered specifically for cost-sensitive, space-constrained industrial and portable applications demanding integrated references and flexible serial interfacing.

FAQ

What is the maximum SCLK frequency supported by TLV2544IPW?

The TLV2544IPW supports serial clock frequencies up to 20 MHz. This allows high-speed data transfer and enables faster conversion times when using SCLK as the conversion clock source (e.g., SCLK/4 mode). At 20 MHz, the device achieves its maximum throughput of 200 KSPS under optimal configuration with short sampling. The interface complies with SPI Mode 0 (CPOL = 0, CPHA = 0).

Does TLV2544IPW require an external reference voltage?

No, TLV2544IPW does not require an external reference voltage. It includes an internal reference selectable between 2 V and 4 V via the CFR register (D10 bit). When using the internal reference, REFM must be tied to analog ground. An external reference can be applied between REFP and REFM for improved accuracy or custom full-scale range, but it is optional - the TLV2544IPW functions fully with internal reference enabled.

How many analog input channels does TLV2544IPW support?

The TLV2544IPW supports four single-ended analog input channels: A0, A1, A2, and A3. This is confirmed by the functional block diagram, terminal function table, and command set documentation - where only commands 0000b through 0100b (channel 0 to channel 2) and 0110b (channel 3) are defined for TLV2544. The TLV2548 variant supports eight channels; TLV2544IPW is explicitly the 4-channel version.

What power-down modes are available on TLV2544IPW?

The TLV2544IPW offers three power-down modes: software power-down (via CFR command 8h), hardware power-down (logic-low on PWDN pin), and autopower-down (automatic entry after conversion completes). All modes reduce current consumption to ≤1 µA when using external reference, and maintain register state. Wake-up occurs on any active transition of CS, FS, or CSTART - enabling rapid resumption of acquisition without reconfiguration.

Can TLV2544IPW perform automatic channel sweeping?

Yes, TLV2544IPW supports programmable auto-channel sweep in Sweep (mode 10) and Repeat Sweep (mode 11) conversion modes. The sweep sequence is configurable via CFR bits D(4,3) and supports four patterns: 0–1–2–3, 0–1–2–3 repeated, 0–0–1–1–2–2–3–3, and 0–1–0–1–0–1–0–1. Each channel conversion result is stored in the 8-word FIFO, and an interrupt is generated when the FIFO reaches the programmed trigger level (1/4, 1/2, 3/4, or full).