Texas Instruments TLV2544CDR

Overview

TLV2544CDR 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 SNDR at 12 kHz. It is used in industrial data acquisition systems requiring low-power, multi-channel sampling with hardware- or software-controlled timing.

For engineers reviewing the TLV2544CDR datasheet, TLV2544CDR pinout, TLV2544CDR application, or TLV2544CDR equivalent, key selection considerations include its 4-channel analog multiplexer, programmable sampling period (12/24 SCLKs), extended sampling via CSTART pin, internal 2 V/4 V reference options, and 1 µA power-down current - all critical for embedded sensor interface and motor control feedback designs.

Technical Context

The TLV2544CDR implements a charge redistribution SAR architecture with break-before-make analog multiplexer supporting four single-ended inputs (A0–A3). 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 operating modes: normal sampling (programmable 12/24 SCLK duration) and extended sampling (asynchronous CSTART-triggered), with configurable EOC/INT pin function and four conversion modes (one-shot, repeat, sweep, repeat-sweep) controlled via 12-bit configuration register (CFR).

Key Specifications

Pinout & Package

TLV2544CDR is packaged in a 16-pin SOIC (D package), with 4 analog inputs (A0–A3), SPI-compatible digital interface (SDI, SDO, SCLK, CS), and dedicated control pins (CSTART, PWDN, EOC/INT, FS, REFP, REFM, VCC, GND).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7822U and TLV2548CDR, the TLV2544CDR uniquely balances 12-bit precision, 4-channel integration, SOIC-16 compactness, and dual-voltage operation - making it optimal for space-constrained, mixed-supply industrial nodes where channel count and accuracy are both critical.

Availability

TLV2544CDR is available at Aetrix Electronics and suitable for industrial sensor interface, motor control feedback, portable data logging, energy metering front-end, and embedded test equipment requiring stable component supply and long-term manufacturability.

Supply support for TLV2544CDR 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 precision data converter innovation.

The TLV2544CDR belongs to TI's TLV254x family of low-power, high-performance SAR ADCs designed specifically for battery-operated and industrial sensing applications demanding accuracy, flexibility, and robust serial interfacing.

FAQ

What is the maximum sampling rate of the TLV2544CDR?

The TLV2544CDR achieves a maximum throughput of 200 KSPS. This is realized using the external SCLK as the conversion clock source at 20 MHz with DIV = 1 (t_conv = 14 × 1 / 20 MHz ≈ 0.7 µs), plus sampling time - resulting in full-cycle performance up to 200 ksamples per second under optimized timing conditions. The TLV2544CDR datasheet confirms this value in the absolute maximum ratings and timing sections.

Does the TLV2544CDR support external reference voltage?

Yes, the TLV2544CDR supports external reference voltage applied differentially between REFP and REFM pins. When using external reference, bit D11 of the Configuration Register (CFR) must be set to '0', and REFM should be connected to the external reference's low-side potential. The TLV2544CDR accepts reference voltages up to VCC, enabling full-scale input ranges tailored to specific sensor outputs.

How many analog input channels does the TLV2544CDR have?

The TLV2544CDR has four single-ended analog input channels: A0, A1, A2, and A3. This is confirmed by the functional block diagram, terminal functions table, and command set description in the TLV2544CDR datasheet - distinguishing it from the 8-channel TLV2548 variant. Channel selection is performed via 4-bit command codes (0000b–0100b) sent on SDI.

What package type is used for the TLV2544CDR?

The TLV2544CDR is supplied in a 16-pin SOIC (D package), as specified in the "Available Options" table of the TLV2544CDR datasheet. This surface-mount package measures 10.3 mm × 6.6 mm with standard 1.27-mm pitch, and is RoHS-compliant. The "CDR" suffix explicitly denotes the SOIC-D packaging variant per Texas Instruments' part numbering convention.

Can the TLV2544CDR operate with a 3.3-V supply?

Yes, the TLV2544CDR operates across a wide supply range of 2.7 V to 5.5 V, fully including 3.3 V. At 3.3 V, it draws 1.0 mA typical operating current (with external reference) and maintains full 12-bit performance, including ±1 LSB INL/DNL and 70 dB SNDR. This makes the TLV2544CDR compatible with modern 3.3-V microcontroller-based systems without level translation.