Texas Instruments AMC1304L05EVM

Overview

AMC1304L05EVM from Texas Instruments is an evaluation module designed for prototyping and electrical characterization of the AMC1304L05 isolated delta-sigma modulator, supporting ±50 mV analog input range with LVDS digital interface, 1 MHz input bandwidth, and galvanic isolation up to 7000 V_PEAK, used in high-accuracy current sensing for motor drives and industrial inverters.

For engineers reviewing the AMC1304L05EVM datasheet, AMC1304L05EVM pinout, AMC1304L05EVM application, or AMC1304L05EVM equivalent, this module enables rapid validation of isolated signal acquisition, clock synchronization, digital filter integration (e.g., with TMS320F28377D or AMC1210), and isolated power supply design using SN6501 and DA2304 transformer.

Technical Context

The AMC1304L05EVM implements a complete isolated signal chain: analog inputs connect via screw terminal J2 to the AMC1304L05's AINP/AINN pins; clock and LVDS data outputs route through J3/J4; power is supplied either externally (J5, JP1=Ext) or via onboard isolated DC-DC (J1 → SN6501 → DA2304 → MBR0520L rectifier → LDO_IN).

It supports two power configurations: isolated unregulated output (7.85–12.8 V at LDO_IN) derived from 2.7–5.5 V controller-side input, or direct high-side supply (4–18 V) applied to J5; R3 (50.5 Ω) is populated only for LVDS variants like AMC1304L05 to terminate differential outputs.

Key Specifications

Availability

AMC1304L05EVM is available at Aetrix Electronics and suitable for motor control development, industrial inverter prototyping, and isolated current measurement system validation requiring stable component supply and traceable evaluation hardware.

Supply support for AMC1304L05EVM 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 specializing in analog, embedded processing, and high-reliability ICs for industrial, automotive, and power applications.

The AMC1304EVM product line is part of TI's isolated sensing evaluation platform, engineered to accelerate adoption of reinforced-isolation delta-sigma modulators in precision current and voltage monitoring systems.

FAQ

What is the primary function of the AMC1304L05EVM?

The AMC1304L05EVM is an evaluation module built to prototype and validate the electrical performance of the AMC1304L05 isolated delta-sigma modulator. It provides screw-terminal access to analog inputs, LVDS data outputs, clock signals, and dual power options-enabling engineers to test signal integrity, isolation behavior, and digital filter integration without custom PCB design. The AMC1304L05EVM directly supports system-level verification of the AMC1304L05 in real-world current sensing applications.

Does the AMC1304L05EVM provide certified galvanic isolation?

No-the AMC1304L05EVM itself is not certified for high-voltage isolation testing. Its isolation capability derives solely from the AMC1304L05 IC, which provides up to 7000 V_PEAK galvanic isolation across its internal capacitive barrier. The EVM's transformer (DA2304) and layout are intended for functional evaluation only; TI explicitly states the board is "not meant for isolation tests" and "not designed to be used in a high-voltage environment." Safety-critical validation requires separate certification of the end-system design.

Which digital filters are compatible with the AMC1304L05EVM's LVDS output?

The AMC1304L05EVM's LVDS output is designed to interface directly with digital decimation filters including the ΔΣ filter module in the TMS320F28377D C2000™ MCU and the dedicated AMC1210 digital filter IC. These devices accept the 20-MHz LVDS bitstream from the AMC1304L05 and perform sinc³ filtering to reconstruct 16-bit resolution output data. The AMC1304L05EVM's J3/J4 terminals expose CLKIN and DOUT signals with proper termination (R3 = 50.5 Ω) to ensure signal integrity for these target filters.

How does the onboard isolated power supply on the AMC1304L05EVM operate?

The AMC1304L05EVM generates isolated power using TI's SN6501 transformer driver (U2), Coilcraft DA2304 1:2.2 isolation transformer (T1), and MBR0520L Schottky rectifier diodes (D1/D2). When JP1 is set to "Iso", controller-side supply (2.7–5.5 V at J1) drives SN6501 to energize the transformer primary; the secondary delivers ~7.85–12.8 V unregulated output to the AMC1304L05's LDO_IN pin (pin 6). This eliminates need for external isolated rails during initial evaluation.

Why is resistor R3 present only on AMC1304L05EVM variants?

Resistor R3 (50.5 Ω) is populated exclusively on AMC1304L05EVM and AMC1304L25EVM boards to terminate the LVDS differential pair (DOUT / DOUT_N) per industry-standard 100-Ω differential impedance requirement. It is omitted on CMOS-output variants (AMC1304M05/M25) because those use single-ended signaling and do not require matched differential termination. This selective placement ensures signal integrity specifically for the AMC1304L05's LVDS interface on the AMC1304L05EVM.