Texas Instruments TLV2541IDG4

Overview

TLV2541IDG4 from Texas Instruments is a 12-bit, single-channel, successive-approximation analog-to-digital converter (SAR ADC) operating from 2.7 V to 5.5 V. It delivers up to 200 kSPS throughput with ±1 LSB INL/DNL, 72 dB SINAD at 20 kHz, and rail-to-rail analog input bandwidth of 500 kHz. Designed for low-power embedded data acquisition, it integrates a built-in conversion clock and supports SPI/DSP-compatible serial interface in an 8-pin MSOP package.

For engineers reviewing the TLV2541IDG4 datasheet, TLV2541IDG4 pinout, TLV2541IDG4 application, or TLV2541IDG4 equivalent, key selection considerations include its single-ended input architecture, autopower-down current as low as 2 μA at 2.7 V, 3.5-μs conversion time, and compatibility with microcontroller SPI ports (CPOL = 0, CPHA = 1) or TMS320 DSP frame sync interfaces.

Technical Context

The TLV2541IDG4 implements a charge redistribution SAR architecture with internal oscillator-based conversion timing, eliminating need for external clock source. Its control logic supports three operational modes: CS-only (SPI), FS-only (DSP), or combined CS/FS - though only the TLV2541 variant supports all three. The device uses a 12-bit unipolar straight-binary output format with zero-scale at GND and full-scale at VREF.

Sampling occurs over 12 SCLK cycles beginning on the fifth SCLK after CS fall; conversion completes in 3.5 μs using a dedicated 4-MHz internal oscillator. Power management includes immediate autopower-down (5 μA within 0.5 μs) and deep power-down (1 μA after ≥2 ms inactive time), triggered automatically post-conversion and exited on next CS fall or FS rise.

Key Specifications

Pinout & Package

TLV2541IDG4 is housed in an 8-pin MSOP (DGK) package, measuring 3.0 mm × 3.0 mm × 1.0 mm, with exposed thermal pad (not electrically connected). Pin functions are validated per TI SLAS245E datasheet Rev. April 2010.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7822U and MAX11100ASA+, the TLV2541IDG4 uniquely supports dual-control (CS+FS) for TMS320 DSP integration, maintains 175–200 kSPS across 2.7–5.5 V, and provides rail-to-rail input at 500 kHz - making it the only option qualified for industrial-grade mixed-voltage, multi-processor DAQ subsystems.

Availability

TLV2541IDG4 is available at Aetrix Electronics and suitable for industrial sensor interface, portable medical instrumentation, energy metering subsystems, and motor control feedback loops requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLV2541IDG4 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 over 50 years of precision data converter innovation.

The TLV254x family was designed for low-power, high-accuracy data acquisition in space-constrained industrial and portable systems - emphasizing minimal external components, flexible digital interfacing, and robust operation from −40°C to 85°C.

FAQ

What is the maximum SCLK frequency supported by TLV2541IDG4 in CS+FS mode at 5 V?

The TLV2541IDG4 supports up to 20 MHz SCLK in CS+FS control mode when VDD = 4.5–5.5 V, enabling 200 kSPS throughput. This mode requires proper setup/hold timing between CS, FS, and SCLK edges per Figure 6 in SLAS245E. At 20 MHz, minimum total cycle time is 4.35 μs - violating this timing invalidates the output data cycle.

Does TLV2541IDG4 require an external reference voltage?

Yes, TLV2541IDG4 requires an external reference applied to the VREF pin. The reference voltage must be between 2 V and VDD (2.7–5.5 V), and establishes the full-scale input range. Internal reference is not provided; using VDD as reference is permissible but limits dynamic range and increases sensitivity to supply noise.

How does autopower-down work in TLV2541IDG4, and what current does it draw?

TLV2541IDG4 enters autopower-down automatically after conversion completion. It draws 2 μA at 2.7 V (5 μA at 5 V) within 0.5 μs. For deep power-down (1 μA), ≥2 ms inactive time between CS/FS edges is required. Wake-up occurs on next CS falling edge or FS rising edge - with no delay or initialization overhead.

Can TLV2541IDG4 interface directly with a TMS320 DSP serial port?

Yes, TLV2541IDG4 supports direct TMS320 DSP interface via its FS pin. When FS is used, the DSP's frame sync signal drives TLV2541IDG4's FS input while CS is held low - eliminating need for GPIO control. Output data is valid on first falling SCLK edge after FS rise, matching standard DSP serial port timing requirements.

What is the analog input voltage range specification for TLV2541IDG4?

The TLV2541IDG4 supports rail-to-rail analog input from GND to VDD, with absolute maximum rating of −0.3 V to VDD + 0.3 V. Full-scale code (FFFh) is produced when input ≥ VREF; zero-scale (000h) when input ≤ GND. Input bandwidth is 500 kHz (−1 dB), limiting usable signal frequency for full-scale accuracy.