Texas Instruments AMC1304L25EVM

Overview

AMC1304L25EVM from Texas Instruments is a dedicated evaluation module for the AMC1304L25 isolated delta-sigma modulator, enabling rapid prototyping of high-accuracy current sensing in motor drives and industrial inverters. It supports ±250 mV analog input range, LVDS digital interface, 1.8 MHz input bandwidth, and galvanic isolation up to 7000 V_PEAK, with onboard SN6501-based isolated power generation.

For engineers reviewing the AMC1304L25EVM datasheet, AMC1304L25EVM pinout, AMC1304L25EVM application, or AMC1304L25EVM equivalent, this module provides verified hardware reference for interfacing the AMC1304L25 with TMS320F28377D or AMC1210 digital filters, evaluating signal chain linearity, timing jitter impact on resolution, and isolated supply stability under varying controller-side voltages (2.7–5.5 V).

Technical Context

The AMC1304L25EVM implements a complete signal path for the AMC1304L25: analog inputs route through screw terminal J2 to the device's AINP/AINN pins, while LVDS data output (DOUT/DOUT_N) and clock input (CLKIN/CLKIN_N) connect via J3 and J4. The board integrates a DA2304-AL 1:2.2 isolation transformer and MBR0520LT1G Schottky rectifier to generate unregulated isolated supply (7.85–12.8 V) for the AMC1304L25's LDO_IN pin when JP1 is set to Iso.

Power architecture supports dual sourcing: controller-side DVDD (2.7–5.5 V) enters at J1, and high-side LDO_IN can be supplied either externally via J5 (JP1 = Ext) or derived from J1 through the SN6501-driven isolation stage (JP1 = Iso). R3 (50.5 Ω) is populated only for LVDS variants like the AMC1304L25 to terminate differential outputs, per TI design guidelines.

Key Specifications

Availability

AMC1304L25EVM is available at Aetrix Electronics and suitable for industrial motor control, renewable energy inverters, and isolated current measurement systems requiring stable component supply, reference-grade evaluation hardware, and TI-validated design implementation.

Supply support for AMC1304L25EVM 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 headquartered in Dallas, Texas, delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The AMC1304EVM series belongs to TI's precision isolated sensing product line, designed specifically to accelerate development of high-fidelity current and voltage measurement subsystems using their reinforced-isolation delta-sigma modulators.

FAQ

What is the primary function of the AMC1304L25EVM?

The AMC1304L25EVM is an evaluation module built exclusively to prototype and validate the performance of the AMC1304L25 isolated delta-sigma modulator. It provides physical access to all critical signals-including ±250 mV analog inputs, LVDS data outputs, and clock inputs-along with integrated isolated power generation using the SN6501 and DA2304-AL transformer. The AMC1304L25EVM enables engineers to verify timing alignment, noise rejection, and digital filter compatibility before final system integration.

Does the AMC1304L25EVM support both CMOS and LVDS variants of the AMC1304 family?

No-the AMC1304L25EVM is configured specifically for LVDS-output devices. As confirmed in the BOM and schematic, resistor R3 (50.5 Ω) is populated to terminate the differential DOUT/DOUT_N and CLKIN/CLKIN_N pairs, and the board silkscreen and documentation explicitly reference AMC1304L25 operation. CMOS variants like AMC1304M25 require different termination and are not supported on this revision of the AMC1304L25EVM without hardware modification.

How is isolated power delivered to the AMC1304L25 on the AMC1304L25EVM?

Isolated power for the AMC1304L25's LDO_IN pin (pin 6) is generated onboard using the SN6501 transformer driver (U2), DA2304-AL 1:2.2 isolation transformer (T1), and MBR0520LT1G Schottky rectifier (D1/D2). When jumper JP1 is set to Iso, controller-side DVDD (2.7–5.5 V applied to J1) drives the SN6501, producing an unregulated 7.85–12.8 V output on the isolated side-within the AMC1304L25's LDO_IN specification. This eliminates need for external isolated supplies during evaluation.

Can the AMC1304L25EVM be used for high-voltage isolation compliance testing?

No-the AMC1304L25EVM is intended solely for electrical characterization of the AMC1304L25 modulator's signal chain performance. While the AMC1304L25 itself provides 7000 V_PEAK galvanic isolation, the evaluation board's transformer (DA2304-AL), layout, and creepage/clearance do not meet IEC/UL high-voltage safety certification requirements. TI explicitly states the AMC1304L25EVM is "not meant for isolation tests and is not designed to be used in a high-voltage environment."

Which digital filters are validated for use with the AMC1304L25EVM?

The AMC1304L25EVM is officially validated with two TI digital filter solutions: the ΔΣ filter module inside the TMS320F28377D C2000 real-time MCU and the standalone AMC1210 decimation filter IC. Both are referenced in the User's Guide as compatible partners that accept the AMC1304L25's LVDS bitstream and reconstruct 16-bit output data. The AMC1304L25EVM's J3/J4 terminals provide direct access to DOUT/CLKIN signals required for these interfaces.