Texas Instruments TLV2544IDR

Overview

TLV2544IDR 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 up to 20 MHz, and features hardware- or software-controllable sampling period for precision signal acquisition in industrial data loggers and sensor interfaces.

For engineers reviewing the TLV2544IDR datasheet, TLV2544IDR pinout, TLV2544IDR application, or TLV2544IDR equivalent, this page delivers verified technical context, exact pin functions, real-world timing behavior, and validated alternative options - all grounded in the SLAS198E datasheet and TI's official characterization for −40°C to 85°C operation.

Technical Context

The TLV2544IDR implements a charge-redistribution SAR architecture with break-before-make analog multiplexer for 4-channel differential/fully-differential input selection. Its internal 4-V or 2-V reference, programmable sampling (12 or 24 SCLKs), and CSTART-triggered extended sampling enable precise control over acquisition time independent of serial clock frequency.

Conversion modes include single-shot, repeat, sweep, and repeat-sweep - all supported by an 8×12-bit FIFO and configurable EOC/INT output. The device accepts external reference and uses SCLK, SCLK/2, SCLK/4, or internal OSC as conversion clock source, achieving 3.86 µs minimum conversion time with internal OSC or 2.8 µs with 20-MHz SCLK.

Key Specifications

Pinout & Package

TLV2544IDR is packaged in a 16-pin SOIC (D package), pin-compatible with TLV2544CD and TLV2544ID variants. Pin functions are validated per SLAS198E Table 3 and functional block diagram.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV2544IDR, ADS7822U trades resolution and integration for lower cost and smaller size, while TLV2548IPW retains full feature parity but adds four more analog inputs - making it a drop-in upgrade path for channel expansion without redesigning the digital interface.

Availability

TLV2544IDR is available at Aetrix Electronics and suitable for industrial process monitoring, motor control feedback, portable data acquisition, and automotive sensor interface applications requiring stable component supply across extended temperature ranges.

Supply support for TLV2544IDR 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 TLV2544IDR belongs to TI's TLV254x family of low-power, high-performance SAR ADCs designed specifically for embedded industrial, test equipment, and sensor signal-chain applications demanding accuracy, flexibility, and thermal reliability.

FAQ

What is the operating temperature range for TLV2544IDR?

The TLV2544IDR is characterized for operation from −40°C to +85°C, meeting industrial-grade environmental requirements. This rating is confirmed in the "AVAILABLE OPTIONS" table of SLAS198E, where TLV2544ID and TLV2544IPW denote the −40°C to 85°C grade. The 'I' suffix in TLV2544IDR explicitly indicates this extended temperature range, distinguishing it from the 'C' grade (0°C to 70°C).

Does TLV2544IDR support SPI interface with CPOL = 0 and CPHA = 0?

Yes, TLV2544IDR natively supports SPI mode 0 (CPOL = 0, CPHA = 0) as stated in the datasheet: "SPI (CPOL = 0, CPHA = 0)/DSP-Compatible Serial Interfaces". SCLK idles low, data is sampled on the rising edge, and SDI/SDO timing aligns with standard microcontroller SPI peripherals - enabling direct connection to ARM Cortex-M, PIC, or MSP430 devices without protocol translation.

How many analog input channels does TLV2544IDR have?

The TLV2544IDR has four analog input channels (A0–A3), as confirmed by the functional block diagram, terminal function table, and command set in SLAS198E. Unlike the TLV2548 variant (A0–A7), the TLV2544IDR's command mapping (Table 1) lists only 0000b through 0110b as valid channel selects - corresponding to channels 0 through 3 - and explicitly marks commands 0001b, 0011b, 0101b, and 0111b as "N/A" for TLV2544.

Can TLV2544IDR use an external reference voltage?

Yes, TLV2544IDR supports external reference via REFP and REFM pins. Configuration register bit D11 controls reference selection: setting D11 = 0 configures the device for external reference, allowing full-scale range adjustment between 0 V and (REFP – REFM). When using external reference, REFM must not be tied to GND, and shunt capacitors (10 µF + 0.1 µF) are required between REFP and REFM per datasheet recommendations.

What is the minimum conversion time for TLV2544IDR?

The minimum conversion time for TLV2544IDR is 3.86 µs when using the internal oscillator as the conversion clock source, as specified in the "detailed description" section and Table 3 of SLAS198E. With a 20-MHz SCLK used as the conversion clock (CFR D[8:7] = 01), conversion time reduces to 2.8 µs - calculated as t_conv = 14 × DIV / f_SCLK, where DIV = 1 yields 14/20 MHz = 0.7 µs per cycle × 4 cycles = 2.8 µs total.