Texas Instruments TLC3541IDGK

Overview

TLC3541IDGK from Texas Instruments is a 14-bit, single-channel unipolar successive-approximation analog-to-digital converter (SAR ADC) operating from a single 5-V supply. It delivers 200-KSPS sampling rate, ±1 LSB INL/DNL accuracy, 81.5 dB SINAD, and rail-to-rail analog input with 500 kHz bandwidth-used in precision industrial process control and motor control feedback loops.

For engineers reviewing the TLC3541IDGK datasheet, TLC3541IDGK pinout, TLC3541IDGK application, or TLC3541IDGK equivalent, this page provides verified electrical specifications, SPI/DSP serial interface timing, auto-power-down behavior, MSOP-8 package details, and validated alternative options for high-resolution data acquisition systems.

Technical Context

The TLC3541IDGK implements a charge-redistribution SAR architecture with an integrated oscillator-based conversion clock (7.5–12 MHz), enabling fixed 2.67 µs max conversion time. It supports three control modes: SPI-compatible (CS-only), DSP frame-sync (FS-only), or dual-signal (CS + FS) operation-each defining distinct SDO activation timing and data-valid edges.

All modes use MSB-first serial output on SDO, require external reference voltage (4–VDD V), and enforce strict timing windows-including 15 ns CS setup before first SCLK, 5 ns hold after 16th SCLK, and 17th SCLK-triggered high-impedance return. The device enters auto-power-down (5 µA) post-conversion and wakes on CS falling edge or FS rising edge.

Key Specifications

Pinout & Package

VSSOP-8 (DGK) package: 3.0 mm × 3.0 mm body, 0.65 mm pitch, exposed thermal pad (not electrically connected), RoHS-compliant NIPDAUAG finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 14-bit SAR ADC applications.

Compared with TLC3545IDGK and ADS7822U, the TLC3541IDGK uniquely combines single-ended rail-to-rail input, DSP frame-sync support, and 14-bit ±1 LSB linearity-making it optimal for industrial control systems requiring both precision and deterministic timing integration.

Availability

TLC3541IDGK is available at Aetrix Electronics and suitable for industrial process control, motor control feedback, and ATE system signal acquisition requiring stable component supply across extended temperature ranges (–40°C to +85°C).

Supply support for TLC3541IDGK 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 over 90 years of innovation in precision data converters and industrial-grade ICs.

The TLC35xx family was designed specifically for high-speed, low-power, high-accuracy data acquisition in space-constrained industrial and instrumentation applications-emphasizing pin compatibility, SPI/DSP interoperability, and robust dc/ac performance.

FAQ

What is the maximum sampling rate supported by the TLC3541IDGK?

The TLC3541IDGK supports a maximum sampling rate of 200 KSPS, achieved with a 15 MHz SCLK and proper timing adherence-including minimum 66 ns SCLK cycle time and 15 ns CS setup before first SCLK. This rate is sustained across the full –40°C to +85°C operating range when powered from 4.5–5.5 V.

Does the TLC3541IDGK require an external clock source for conversion?

No, the TLC3541IDGK integrates a built-in oscillator that serves as the conversion clock (7.5–12 MHz), eliminating need for external timing components. Conversion time is fixed at 1.67–2.67 µs, independent of SCLK frequency-ensuring deterministic latency critical for real-time control loops.

How does the FS pin function on the TLC3541IDGK compared to the TLC3545IDGK?

The FS pin is exclusive to the TLC3541IDGK and provides DSP frame synchronization: its rising edge releases the MSB to SDO, enabling tight alignment with TMS320 serial port framing. The TLC3545IDGK lacks FS and relies solely on CS for all control-making TLC3541IDGK the only variant supporting true FS-driven timing.

What is the analog input voltage range specification for the TLC3541IDGK?

The TLC3541IDGK supports a rail-to-rail unipolar analog input range from 0 V to VDD (4.5–5.5 V). Absolute maximum rating allows –0.3 V to VDD+0.3 V, but recommended operation is strictly 0–VDD to maintain ±1 LSB INL and avoid reference interaction or input stage saturation.

Can the TLC3541IDGK operate from a 3.3-V supply?

No-the TLC3541IDGK is specified only for 4.5–5.5 V operation per its recommended conditions and absolute maximum ratings. Attempting 3.3 V supply violates minimum VDD requirement, risks improper SAR capacitor charging, and invalidates all ac/dc specifications including 200 KSPS sampling and 81.5 dB SINAD performance.