AMC1204DW

ADCs/DACs - Special Purpose Overview

The AMC1204DW is a second-order isolated Delta-Sigma modulator from Texas Instruments, designed for high-reliability analog signal acquisition. It utilizes silicon dioxide (SiO2) capacitive isolation technology to provide galvanic isolation between input and output circuits. The device features a differential input optimized for shunt resistor connections within a ±250mV range. It operates with a fixed gain of 8 and supports data rates up to 78kSPS at a maximum clock frequency of 20MHz. Key electrical specifications include a typical noise level of 3.1mV RMS, a common-mode rejection ratio (CMRR) of 108dB, and an input bandwidth of at least 60kHz. The component is housed in a 16-pin SOIC package.

ADCs/DACs - Special Purpose Feature Summary

• Capacitive isolation barrier providing 4000V peak isolation voltage and 1200V working voltage
• Second-order Delta-Sigma modulation with 1-bit digital PWM output
• Optimized ±250mV differential input range for direct shunt resistor connection
• High CMRR of 108dB and low offset error of 1.5mV maximum

ADCs/DACs - Special Purpose Applications

• Motor control current sensing
• Green energy systems and inverters
• Uninterruptible power supplies (UPS)
• Communication power supply monitoring

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'DW' corresponds to the 16-pin SOIC package variant when sourcing. Confirm AEC-Q100 qualification status if automotive compliance is required for the specific manufacturing lot. Ensure the procurement channel provides official datasheets matching the Texas Instruments specification for the AMC1204 series.

ADCs/DACs - Special Purpose Selection Notes

Select the AMC1204DW when a fixed gain of 8 is required for signals within the ±250mV input range. This component is suitable for applications demanding high common-mode transient immunity exceeding 10kV/µs. Consider the 16-pin SOIC footprint during PCB layout planning. Verify that the downstream circuitry can process the 1-bit PWM output stream generated by the internal modulator.

ADCs/DACs - Special Purpose Part Context

The AMC1204 belongs to the Texas Instruments AMC1200 family of isolated amplifiers and modulators. While the AMC1200 offers an analog output, the AMC1204 provides a digital bitstream output, simplifying interface with microcontrollers or FPGAs. The DW suffix specifically denotes the 16-lead Small Outline Integrated Circuit (SOIC) package with a wide body, distinguishing it from the 8-lead SSO variant.

ADCs/DACs - Special Purpose Replacement Considerations

The AMC1204B is a related variant offering higher peak isolation voltage (4250V). Direct pin-to-pin replacement requires verifying that the system design accommodates the specific isolation ratings and that the fixed gain of 8 remains appropriate for the application.