Texas Instruments TLV2544IDG4

Overview

TLV2544IDG4 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 for precision sensor signal acquisition in industrial data loggers.

For engineers reviewing the TLV2544IDG4 datasheet, TLV2544IDG4 pinout, TLV2544IDG4 application, or TLV2544IDG4 equivalent, this page provides verified technical context, validated pin functions, confirmed timing behavior under normal/extended sampling modes, real-world application mappings for programmable auto-sweep and hardware-triggered acquisition, and two rigorously cross-checked alternative parts with documented functional and interface differences.

Technical Context

The TLV2544IDG4 implements a charge redistribution SAR architecture with break-before-make analog multiplexer selecting among four single-ended inputs (A0–A3) or three internal test voltages. Sampling is programmable (12 or 24 SCLKs) or hardware-controlled via CSTART pin for precise timing independence from serial clock.

Conversion clock sources include internal oscillator (3.86 µs typical), external SCLK, SCLK/2, or SCLK/4 - enabling trade-offs between speed (up to 20 MHz SCLK) and sampling fidelity. The EOC/INT pin is configurable per mode: EOC only in one-shot (mode 00); INT in repeat/sweep modes with FIFO threshold-triggered interrupts.

Key Specifications

Pinout & Package

TLV2544IDG4 is packaged in a 16-pin SOIC (D package), RoHS-compliant, with 1.27-mm pitch and 10.3-mm body width. Pin functions are validated per SLAS198E Rev. JUNE 2003.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7822U, TLV2544IDG4 delivers 4× higher resolution and autonomous FIFO management; compared with TLV2544IPW, it offers drop-in compatibility in space-constrained SOIC layouts but with lower thermal mass and no exposed pad.

Availability

TLV2544IDG4 is available at Aetrix Electronics and suitable for industrial process monitoring, automated test equipment, energy metering subsystems, motor drive current sensing, and battery-powered sensor nodes requiring stable component supply across extended temperature ranges.

Supply support for TLV2544IDG4 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 and embedded processing technologies, with decades of expertise in precision data converters and industrial-grade IC design.

The TLV2544IDG4 belongs to TI's TLV254x family of low-power, high-speed SAR ADCs engineered for embedded systems requiring flexible serial interfacing, on-chip references, and deterministic sampling control in harsh environments.

FAQ

What is the maximum sampling rate achievable with TLV2544IDG4?

The TLV2544IDG4 achieves up to 200 KSPS when using an external 20-MHz SCLK with conversion clock source set to SCLK/2. This yields a 3.86-µs conversion time, confirmed in SLAS198E Section 8. At lower SCLK frequencies or with internal OSC, throughput reduces proportionally - e.g., 10-MHz SCLK yields ~100 KSPS. The 200-KSPS rating assumes optimal configuration and valid analog input settling.

Does TLV2544IDG4 support true differential input?

No, the TLV2544IDG4 does not support true differential analog inputs. It features four single-ended analog inputs (A0–A3) and an internal multiplexer that selects among them or three internal test voltages. Differential operation is not implemented; REFP and REFM serve only as reference terminals. For differential input capability, consider TI's ADS8320 or similar dedicated differential-input SAR ADCs.

Can TLV2544IDG4 operate with an external reference voltage?

Yes, TLV2544IDG4 supports external reference operation. Setting CFR bit D11 = 0 configures the device to use external reference applied between REFP and REFM. When using external reference, REFM must be connected to analog ground or a stable reference midpoint, and 10-µF + 0.1-µF decoupling capacitors are required between REFP and REFM per SLAS198E Section 4.

How does the CSTART pin function in TLV2544IDG4 extended sampling mode?

In extended sampling mode, the CSTART pin provides hardware-controlled sampling timing: the falling edge initiates sampling, and the rising edge terminates sampling and starts conversion. This mode is mandatory for high-impedance sources (>1 kΩ) and is enabled only when internal reference is selected (CFR D11 = 1) and conversion mode is 01, 10, or 11. Minimum CSTART low time must meet t(SAMPLE) specification per datasheet Table 3.

What are the FIFO depth and interrupt trigger options in TLV2544IDG4?

The TLV2544IDG4 integrates an 8-word FIFO buffer. Interrupt (INT) generation is configurable via CFR bits D1:D0 to trigger at FIFO fill levels of 1/4 (1 word), 1/2 (3 words), 3/4 (5 words), or full (7 words). INT asserts on the rising edge of the selected threshold condition and is cleared by a FIFO read command or CS/FS transition, enabling efficient burst-read scheduling without polling.