Texas Instruments TLC5540EVM

Overview

TLC5540EVM from Texas Instruments is an evaluation module designed for lab prototype testing of the TLC5540 8-bit, 40-MSPS analog-to-digital converter. It supports direct, DC-coupled, and AC-coupled analog input paths via BNC J4; features a buffered 40-MHz clock input (J1); provides octal-latched digital output (J5); and operates from ±5 V analog and +5 V digital supplies. It enables high-fidelity ADC characterization in RF sampling, video digitization, and instrumentation applications.

For engineers reviewing the TLC5540EVM datasheet, TLC5540EVM pinout, TLC5540EVM application, or TLC5540EVM equivalent, this page delivers verified board-level specifications, grounding configuration options, amplifier biasing methods, clock buffering topology, and digital output control modes - all critical for signal integrity validation and system integration planning.

Technical Context

The TLC5540EVM implements a dedicated signal chain for the TLC5540 ADC: THS3001 op-amp (U2) provides dc-coupled gain-of-2 or ac-coupled adjustable-bias input conditioning; LC filter (FB5/R15/C5) limits analog bandwidth to ≤12 MHz (configurable to 20 MHz); and SN74AC573 latch (U4) buffers 8-bit parallel data with 3-state enable (J5 pin 24). Clock distribution uses SN74AC11004 inverters (U1) to drive both ADC and external circuitry with matched delay.

Grounding architecture separates analog (AGND) and digital (DGND) planes, joined optionally via solder jumpers (E13–E14 or E21–E22); input range selection depends on jumper J6 position and device variant (TLC5540 vs. TLC5510A); and test points TP1/TP2 allow oscilloscope monitoring of analog ground and THS3001 output respectively.

Key Specifications

Availability

TLC5540EVM is available at Aetrix Electronics and suitable for high-speed data acquisition, video digitization, and RF test equipment development requiring stable component supply, traceable sourcing, and long-term evaluation platform availability.

Supply support for TLC5540EVM 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 company founded in 1930, specializing in analog, embedded processing, and high-performance silicon solutions for industrial, automotive, and communications markets.

The TLC5540EVM belongs to TI's Mixed-Signal Evaluation Modules product line, engineered specifically to accelerate prototyping and performance validation of high-speed ADCs like the TLC5540 in lab environments where layout-sensitive signal integrity is critical.

FAQ

What is the primary function of the TLC5540EVM?

The TLC5540EVM is a dedicated evaluation module for the TLC5540 8-bit, 40-MSPS analog-to-digital converter. It provides a fully laid-out, surface-mount PCB with calibrated analog input paths (direct, DC-coupled, AC-coupled), clock buffering, latched digital output, and test points - enabling engineers to validate ADC performance under real-world signal conditions without custom PCB design. The TLC5540EVM is not a standalone ADC but a hardware platform built around the TLC5540 IC.

Does the TLC5540EVM support both TLC5540 and TLC5510 devices?

Yes, the TLC5540EVM is a multi-device platform supporting the TLC5540, TLC5510, and TLC5510A ADCs. Jumper configurations (e.g., J6, J11, J16) and component options (e.g., C14 value, R14) are specified per device in the user's guide. For example, C14 is 100 pF for TLC5540 and 150 pF for TLC5510/TLC5510A; J11 and J16 must be installed for TLC5510A reference setup. The TLC5540EVM board accommodates all three variants via documented hardware changes.

How is analog input bias configured on the TLC5540EVM?

Analog input bias on the TLC5540EVM is set using jumper J6 and optional potentiometer R2. With J6 removed, the TLC5540 accepts 0.6–2.6 V input; with J6 installed, range shifts to 0–2.28 V (at 3.3 VDDA). For AC-coupled inputs, R2 adjusts DC bias between near ground and near 5 V. The TLC5510A uses external 4-V reference (U5) and requires J11/J16 installed, enabling 0–4 V input regardless of J6 state. All configurations are validated in the SLAU007D user's guide.

Can the digital output of the TLC5540EVM drive a microcontroller bus directly?

Yes - the TLC5540EVM's digital output can interface with a microcontroller bus using its 3-state capability. Removing jumper E17–E18 disconnects the OE (output enable) pin from ground; applying logic high to J5 pin 24 places the SN74AC573 latch outputs in high-impedance mode, allowing shared bus operation. When OE is low, outputs drive actively. This feature enables clean bus arbitration without external logic, confirmed in Section 2.2 of the TLC5540EVM user's guide.

What clock source requirements apply to the TLC5540EVM?

The TLC5540EVM requires an external clock up to 40 MHz delivered via 50-Ω BNC connector J1. The clock is buffered through SN74AC11004 inverters (U1) to drive both the TLC5540 and provide a clean reference output at J5 pin 22. If driving from a microcontroller or DSP, resistor R1 must be removed to avoid loading. The board does not include an onboard oscillator - clock generation is strictly external, as specified in Section 2.3 of SLAU007D.