Texas Instruments AMC1203EVM

Overview

AMC1203EVM from Texas Instruments is a dedicated evaluation module for the AMC1203 isolated delta-sigma modulator, enabling rapid prototyping of high-accuracy current/voltage sensing systems. It provides galvanically isolated analog input (±320 mV range), 10 MHz modulator clock, 9-pin D-sub digital interface to filters like AMC1210, and screw-terminal access to CHA+/CHA– inputs.

For engineers reviewing the AMC1203EVM datasheet, AMC1203EVM pinout, AMC1203EVM application, or AMC1203EVM equivalent, this page delivers verified board-level specifications, isolation interface details, power configuration options (J1/J2), analog input filtering (R/C network), and integration guidance with digital filters - all critical for industrial motor control, energy metering, and isolated sensor signal chain design.

Technical Context

The AMC1203EVM implements a complete hardware interface for the AMC1203BDUB 8-SOP modulator, including SiO₂-based galvanic isolation rated to 4000 V_PEAK, on-board RC anti-aliasing (330 pF + 12 Ω), and dual-supply separation: 5 V_ISO/ISOGND on J1 (primary side) and 4.5–5.5 V_DD2/GND2 on J2 (secondary side).

Digital outputs MDAT and MCLK are routed to a 9-pin female D-sub connector (J2), supporting direct connection to FPGA logic or the AMC1210 digital filter evaluation module; jumper-configurable W1/W2 enable daisy-chaining multiple AMC1203EVMs to a single AMC1210.

Key Specifications

Availability

AMC1203EVM is available at Aetrix Electronics and suitable for industrial motor drives, energy metering reference designs, and isolated current-sensing validation requiring stable component supply, traceable sourcing, and long-term evaluation board continuity.

Supply support for AMC1203EVM 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, specializing in analog, embedded processing, and high-performance signal chain solutions for industrial, automotive, and communications markets.

The AMC1203EVM belongs to TI's Precision Analog Evaluation Module family, designed specifically to accelerate development of isolated measurement systems using TI's reinforced-isolation delta-sigma modulators and companion digital filters.

FAQ

What is the primary function of the AMC1203EVM?

The AMC1203EVM is an evaluation module built around the AMC1203BDUB isolated delta-sigma modulator. Its primary function is to provide engineers with a ready-to-use platform for evaluating galvanically isolated analog-to-digital conversion performance - specifically for ±320 mV differential inputs - and interfacing with digital filters such as the AMC1210. The AMC1203EVM enables rapid validation of signal integrity, isolation robustness, and system-level timing before committing to custom PCB design.

Does the AMC1203EVM include the AMC1203 IC?

Yes, the AMC1203EVM includes the AMC1203BDUB device mounted in an 8-pin SOP package (U1 on the schematic). This is the exact same modulator IC used in production systems - not a placeholder or emulator. The AMC1203EVM exposes its analog inputs via screw terminals (J4), digital outputs via J2, and isolated power via J1, allowing full functional verification of the AMC1203 IC under real operating conditions.

Can the AMC1203EVM operate without connecting to the AMC1210?

Yes, the AMC1203EVM can operate standalone. It generates a 1-bit Manchester-encoded bitstream (MDAT) synchronized to MCLK at 10 MHz, which may be captured directly by an FPGA or microcontroller with appropriate digital filtering firmware. No AMC1210 is required - though the AMC1210 simplifies post-processing by providing configurable decimation, offset/gain calibration, and 16-bit parallel output. The AMC1203EVM's J2 connector supports both configurations.

What are the voltage limits for safe operation of the AMC1203EVM?

The AMC1203EVM must be operated within strict voltage boundaries: analog input differential must remain within ±320 mV (per AMC1203 specification), isolated power (J1) must be 5 V_ISO ±5%, and digital supply (J2) must be 4.5–5.5 V_DD2. Exceeding these ranges risks irreversible damage to the AMC1203BDUB IC or board components. The User's Guide explicitly warns against applying >5 V to any input or output pin, and cautions that improper grounding may compromise isolation integrity.

How is isolation implemented on the AMC1203EVM?

Isolation on the AMC1203EVM is implemented entirely through the AMC1203BDUB IC's integrated silicon dioxide (SiO₂) barrier - not external optocouplers or transformers. This barrier separates the analog input stage (pins IN+, IN–, GND1, VDD1) from the digital output stage (MDAT, MCLK, GND2, VDD2), achieving 4000 V_PEAK reinforced isolation. Physical layout enforces creepage/clearance compliance, with separate ground planes (ISOGND and GND2) and no conductive traces crossing the isolation boundary - ensuring the AMC1203EVM maintains the same isolation certification as the underlying AMC1203 IC.