Texas Instruments AMC1305L25EVM

Overview

AMC1305L25EVM from Texas Instruments is a dedicated evaluation module for the AMC1305L25 isolated delta-sigma modulator, supporting ±250 mV analog input range with LVDS digital interface and 1.8 MHz input bandwidth. It enables rapid prototyping of high-accuracy current sensing in motor drives and industrial inverters using galvanically isolated signal conversion.

For engineers reviewing the AMC1305L25EVM datasheet, AMC1305L25EVM pinout, AMC1305L25EVM application, or AMC1305L25EVM equivalent, this module provides verified hardware reference for interfacing the AMC1305L25 with TMS320F28377D or AMC1210 digital filters, evaluating isolated analog-to-bitstream conversion under real-world power supply and layout conditions.

Technical Context

The AMC1305L25EVM implements a complete isolated signal chain: analog inputs connect via screw terminal J2 to the AMC1305L25's differential VINP/VINN pins; clock and LVDS data outputs route through J3/J4; and dual power options-external high-side supply (J5) or onboard isolated supply (via SN6501 + DA2304 transformer + TLV70450 LDO)-support flexible test configurations.

It integrates a 1:2.2 isolation transformer (DA2304), Schottky rectifier (MBR0520LT1G), and low-quiescent-current LDO (TLV70450) to deliver stable AVDD to the AMC1305L25, while resistor R2 (100 Ω) is populated exclusively for LVDS interface termination on AMC1305L25-equipped boards.

Key Specifications

Availability

AMC1305L25EVM is available at Aetrix Electronics and suitable for motor control development, industrial inverter validation, and isolated current sensing system prototyping requiring stable component supply and TI-validated reference design fidelity.

Supply support for AMC1305L25EVM 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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The AMC1305EVM product line is designed specifically to accelerate evaluation of TI's isolated delta-sigma modulators-including the AMC1305L25-in high-voltage, high-noise power conversion systems.

FAQ

What is the primary function of the AMC1305L25EVM?

The AMC1305L25EVM is an evaluation module built to prototype and validate the AMC1305L25 isolated delta-sigma modulator. It provides physical access to analog inputs, LVDS data outputs, and clock signals via screw terminals, along with configurable isolated power delivery. The AMC1305L25EVM allows engineers to verify performance of the AMC1305L25 in real-world current sensing applications before committing to custom PCB design.

Does the AMC1305L25EVM include the AMC1305L25 device?

Yes, the AMC1305L25EVM is shipped populated with the AMC1305L25 device (16-pin SOIC-DW package) installed at U1. Unlike generic evaluation platforms, this board is specifically configured for the AMC1305L25 variant-evidenced by inclusion of R2 (100 Ω) for LVDS termination, which is omitted on AMC1305M05/M25 variants per Table 2 of the user guide.

How does the isolated power supply work on the AMC1305L25EVM?

The AMC1305L25EVM generates isolated AVDD using the SN6501 transformer driver (U3), DA2304 1:2.2 isolation transformer (T1), MBR0520LT1G Schottky rectifier (D1/D2), and TLV70450 LDO (U2). When JP1 is set to "Iso", controller-side DVDD (3–5.5 V via J1) powers the SN6501, which drives the transformer to produce isolated AC, rectified and regulated to ~5 V for the AMC1305L25's AVDD pin (pin 7).

Can the AMC1305L25EVM be used for safety-critical or high-voltage isolation testing?

No. The AMC1305L25EVM is explicitly intended only for electrical characterization of the AMC1305L25-not for isolation compliance testing. The user guide states it is "not meant for isolation tests" and "not designed to be used in a high-voltage environment." While the AMC1305L25 itself provides 7000 V_PEAK isolation, the onboard transformer (DA2304) and PCB layout do not carry equivalent certification, and the board lacks creepage/clearance for functional safety validation.

Which digital filters are supported for decoding the AMC1305L25 bitstream on the AMC1305L25EVM?

The AMC1305L25EVM is designed to interface with digital filters including the ΔΣ filter module in the TMS320F28377D microcontroller and the AMC1210 decimation filter IC. These devices process the LVDS bitstream from the AMC1305L25 to reconstruct 16-bit resolution data with 80 dB dynamic range (13 ENOB) at 78 kSPS, as specified in the AMC1305 family documentation.