Texas Instruments AMC1204EVM

Overview

AMC1204EVM from Texas Instruments is a fully assembled, ready-to-use evaluation module designed to prototype and validate the AMC1204 isolated delta-sigma modulator in high-precision current-shunt measurement systems. It integrates two AMC1204 devices (U1: AMC1204BDWV; U4: AMC1204BDW), supports ±250 mV analog input range, provides galvanic isolation up to 4000 V_PEAK, and delivers 1-bit bitstream output synchronized to an external 10 MHz clock for use with digital filters such as the AMC1210.

For engineers reviewing the AMC1204EVM datasheet, AMC1204EVM pinout, AMC1204EVM application, or AMC1204EVM equivalent, this module enables rapid validation of isolated signal conditioning in motor control, industrial power supplies, and energy metering designs - with screw-terminal analog access, isolated power options via SN6501 transformer driver, and DB9 digital interface compatibility.

Technical Context

The AMC1204EVM hosts two independent AMC1204 modulators - one in DWV package (U1) and one in DW package (U4) - each featuring a silicon dioxide (SiO₂) isolation barrier separating analog input circuitry (AVDD, VINP/VINN, AGND) from digital output domain (DVDD, DATA, CLKIN, DGND). The board implements second-order delta-sigma modulation with internal reference, supporting 10 MHz modulator clock input and delivering bitstream output at the same rate.

Digital outputs are routed to a 9-pin female D-sub connector (J2), with dedicated pins for CLKIN and DATA from both U1 and U4. Isolated VDD1 supply is generated on-board via SN6501DBV-driven DA2303-ALB transformer or can be applied externally through J1 (5 VISO / ISOGND), while VDD2 (4.5–5.5 V) powers the digital side and is supplied via J2 pins 3 and 5.

Key Specifications

Availability

AMC1204EVM is available at Aetrix Electronics and suitable for motor control prototyping, industrial power supply monitoring, and energy metering development requiring stable component supply and validated reference design integration.

Supply support for AMC1204EVM 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 solutions for industrial, automotive, and communications applications.

The AMC1204EVM belongs to TI's precision isolated signal conditioning product line, engineered specifically to accelerate evaluation of isolated delta-sigma modulators in high-voltage, noise-sensitive current measurement systems.

FAQ

What is the primary function of the AMC1204EVM?

The AMC1204EVM is an evaluation module that enables functional validation and system-level testing of the AMC1204 isolated delta-sigma modulator. It provides physical implementation of analog input conditioning, isolated power generation, and digital bitstream interfacing - allowing engineers to verify performance of the AMC1204BDW and AMC1204BDWV devices in real-world current-shunt measurement circuits before final PCB integration. The AMC1204EVM does not perform A/D conversion itself but delivers raw 1-bit output for external digital filtering.

Does the AMC1204EVM include both AMC1204DW and AMC1204DWV devices?

Yes, the AMC1204EVM includes two distinct AMC1204 devices: U1 is the AMC1204BDWV (DWV package) and U4 is the AMC1204BDW (DW package). Both are populated and independently accessible via separate analog screw terminals (J3 for U4, J4 for U1) and digital outputs (J2 pins 6–9). This dual-device configuration allows side-by-side comparison or parallel channel evaluation within a single board layout.

Can the AMC1204EVM operate without external isolated power?

Yes, the AMC1204EVM can generate isolated VDD1 internally using the SN6501DBV driver and DA2303-ALB transformer powered from VDD2 (supplied via J2). In default configuration, this provides regulated 5 V to the analog side. Alternatively, users may bypass the on-board isolation by applying an external 4.5–5.5 VDC supply directly to J1 (pins 1 and 2), enabling operation with pre-isolated rails such as gate-drive supplies - a key flexibility supported by the AMC1204EVM design.

What digital interface options does the AMC1204EVM provide for connecting to an FPGA or digital filter?

The AMC1204EVM routes DATA and CLKIN signals from both AMC1204 devices to a standard 9-pin female D-sub connector (J2). Pins 6–9 carry CLKIN_U1, DATA_U1, CLKIN_U4, and DATA_U4 respectively, allowing synchronous capture of two independent bitstreams. The interface operates at CMOS voltage levels (VDD2 referenced) and supports direct connection to FPGA I/O banks or evaluation modules like the AMC1210 - no level-shifting or protocol translation is required for basic bitstream acquisition.

What is the maximum analog input voltage the AMC1204EVM supports?

The AMC1204EVM supports a differential analog input range of ±250 mV across its screw terminals (J3 and J4), matching the specified input range of the underlying AMC1204 modulators. Exceeding this range risks saturation and non-linear output behavior. The board includes RC low-pass filtering (330 pF + 12 Ω) per channel to limit bandwidth and reduce high-frequency noise - consistent with typical shunt-based current sensing applications where the AMC1204EVM is deployed.