Texas Instruments AMC1305M25EVM

Overview

AMC1305M25EVM from Texas Instruments is a dedicated evaluation module for the AMC1305M25 isolated delta-sigma modulator, supporting ±250 mV analog input range and 1.8 MHz input bandwidth in CMOS output configuration. It provides screw-terminal access to analog inputs (J2), clock (J3), and data output (J4), with onboard isolated power generation via SN6501 and DA2304 transformer for AVDD supply.

For engineers reviewing the AMC1305M25EVM datasheet, AMC1305M25EVM setup, AMC1305M25EVM schematic, or AMC1305M25EVM BOM, this module enables rapid prototyping of high-accuracy current sensing in motor control, industrial inverters, and isolated power supplies - with full circuit documentation, layout files, and bill of materials included in the official user guide.

Technical Context

The AMC1305M25EVM implements a complete signal chain for evaluating the AMC1305M25: analog input conditioning via RC filter (R1/C3), galvanically isolated ΔΣ modulation across a capacitive barrier rated up to 7000 V_PEAK, and digital output interfacing compatible with TMS320F28377D or AMC1210 decimation filters. The board supports both external high-side supply (via J5) and controller-side-derived isolated supply (via JP1–Iso).

Power architecture includes SN6501 push-pull driver, DA2304 1:2.2 isolation transformer, MBR0520L Schottky rectifier, and TLV70450 5-V LDO to deliver stable AVDD. Clock input is differential CMOS (CLKIN/CLKIN_N), and data output is single-ended CMOS (DOUT), matching the pinout and timing requirements of the AMC1305M25DW package.

Key Specifications

Availability

AMC1305M25EVM is available at Aetrix Electronics and suitable for motor drive development, industrial inverter validation, and isolated current sensing design requiring stable component supply, traceable sourcing, and full technical documentation support.

Supply support for AMC1305M25EVM 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 silicon solutions for industrial, automotive, and enterprise applications.

The AMC1305EVM belongs to TI's precision isolated sensing evaluation platform family, designed specifically to accelerate development of high-fidelity current and voltage measurement systems using their reinforced-isolation delta-sigma modulators.

FAQ

What is the primary function of the AMC1305M25EVM?

The AMC1305M25EVM is an evaluation module purpose-built to prototype and validate the AMC1305M25 isolated delta-sigma modulator. It provides immediate access to all critical signals - analog inputs (±250 mV range), differential clock, and CMOS data output - along with flexible power options (isolated or external AVDD) and complete design files including schematic, BOM, and PCB layout per SBAU237 user guide.

Which device does the AMC1305M25EVM evaluate?

The AMC1305M25EVM evaluates the AMC1305M25 - a single-channel, second-order, capacitive-isolated delta-sigma modulator in 16-pin SOIC DW package, featuring ±250 mV input range, 1.8 MHz small-signal bandwidth, and CMOS-compatible digital interface. The board is pre-populated with the AMC1305M25DW and configured as "Assembly Variant: AMC1305EVM_M25" per the official schematic.

Does the AMC1305M25EVM provide isolated power for the AMC1305M25?

Yes - the AMC1305M25EVM includes an onboard isolated power supply chain: SN6501 driver excites the DA2304 1:2.2 transformer, whose secondary output is rectified by MBR0520L Schottky diode and regulated to 5 V by TLV70450 LDO. This delivers AVDD to the AMC1305M25 when JP1 is set to Iso position, eliminating need for external high-side supply during evaluation.

Can the AMC1305M25EVM be used with other AMC1305 variants?

No - the AMC1305M25EVM is specifically configured for the AMC1305M25. While the same PCB platform supports AMC1305L25 and AMC1305M05 (per Table 2 BOM), the AMC1305M25EVM variant uses only the AMC1305M25DW, omits R2 (populated only for LVDS variant), and is documented as "Assembly Variant: AMC1305EVM_M25" in the schematic title block and user guide.

What documentation accompanies the AMC1305M25EVM?

The AMC1305M25EVM is supported by the official SBAU237 User's Guide (September 2014), which includes full circuit description, annotated schematic diagrams (analog input, power, digital interface), PCB silk screen drawing, complete bill of materials (Table 2), and setup instructions. All files are publicly available on ti.com and referenced directly in the guide's "Related Documentation" section.