Texas Instruments TLV2544IPWR

Overview

TLV2544IPWR 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 features hardware- or software-controllable sampling via CSTART pin. It is used in industrial data acquisition systems requiring low-power, multi-channel sampling with flexible timing control.

For engineers reviewing the TLV2544IPWR datasheet, TLV2544IPWR pinout, TLV2544IPWR application, or TLV2544IPWR equivalent, key selection considerations include its 12-bit resolution, 200-KSPS throughput, built-in 4-V/2-V internal reference, programmable sampling period (12/24 SCLKs), and extended sampling capability via dedicated CSTART pin for high-impedance sources.

Technical Context

The TLV2544IPWR implements a charge redistribution SAR architecture with break-before-make analog multiplexer supporting four differential/analog inputs. Its conversion clock can be sourced from internal oscillator or external SCLK (up to 20 MHz), enabling configurable conversion time from 3.86 µs (internal OSC) to as low as 2.8 µs (20-MHz SCLK).

It features dual-mode operation: normal sampling (programmable 12/24 SCLK duration) and extended sampling (asynchronous CSTART-triggered, independent of SCLK). The device supports four conversion modes - one-shot, repeat, sweep, and repeat-sweep - with FIFO-based data buffering and interrupt-driven readout via EOC/INT pin.

Key Specifications

Pinout & Package

Packaged in 16-pin TSSOP (PW), the TLV2544IPWR uses a surface-mount, leaded package with 0.65-mm pitch and JEDEC-standard footprint. Pin functions are validated per TI SLAS198E datasheet revision June 2003.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV2544IPWR, ADS7822U sacrifices resolution and flexibility for smaller size and cost, while TLV2548IPW extends functionality with four extra analog inputs-both share the same 16-TSSOP package footprint and SPI timing model.

Availability

TLV2544IPWR is available at Aetrix Electronics and suitable for industrial automation, motor control, and portable instrumentation requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TLV2544IPWR 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 TLV2544IPWR belongs to TI's TLV254x family of low-power, 12-bit SAR ADCs designed for cost-sensitive, space-constrained industrial and embedded systems requiring integrated references and flexible serial interfaces.

FAQ

What is the maximum sampling rate supported by the TLV2544IPWR?

The TLV2544IPWR achieves a maximum throughput of 200 KSPS under optimal conditions-specifically when using an external 20-MHz SCLK as the conversion clock source (CFR D[8:7] = 01) and short sampling (12 SCLKs). At this rate, it maintains 70-dB SNDR and 75-dB SFDR at 12-kHz input frequency. Lower SCLK frequencies or long sampling reduce effective throughput but improve accuracy for high-impedance sources.

Does the TLV2544IPWR require an external reference voltage?

No, the TLV2544IPWR does not require an external reference voltage. It integrates a factory-trimmed 4-V or 2-V internal reference (selectable via CFR bits D11/D10). When using the internal reference, REFM must be tied to analog ground, and 10-µF + 0.1-µF decoupling capacitors must be placed between REFP and REFM. An external reference may be used for higher precision or custom scaling, but is optional.

How does the CSTART pin function in the TLV2544IPWR?

The CSTART pin provides asynchronous, hardware-controlled sampling initiation in the TLV2544IPWR. A falling edge starts the sampling period; the low-time of CSTART defines its duration; a rising edge terminates sampling and begins conversion. This mode is especially valuable for high-impedance sources or when precise synchronization with external events (e.g., PWM edges) is required-and operates independently of SCLK timing.

Can the TLV2544IPWR interface directly with a TI C2000 DSP?

Yes, the TLV2544IPWR supports direct interface with TI C2000 DSPs via its FS (frame sync) pin. When FS is used, the DSP asserts a low-going pulse to initiate each serial frame, enabling deterministic timing and eliminating the need to toggle CS between conversions. The TLV2544IPWR accepts MSB-first data on SDI and outputs conversion results on SDO with timing aligned to FS and SCLK falling/rising edges as specified in SLAS198E.

What are the valid operating temperature ranges for the TLV2544IPWR?

The TLV2544IPWR is rated for industrial operation from −40°C to +85°C. This rating is confirmed by TI's characterization of the "I" grade variant (TLV2544I), which applies to the TLV2544IPWR in its 16-TSSOP (PW) package. All electrical specifications-including INL/DNL, SNDR, and power consumption-are guaranteed across this full temperature range, making it suitable for harsh-environment deployments.