Isolated ADCs

High-performance isolated ADCs for high-voltage systems

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Isolated ADCs, also known as isolated modulators, output a digital bitstream from a precise delta-sigma modulator capable of withstanding high common-mode voltages. Our portfolio of isolated ADCs consists of basic and reinforced isolated modulators for high-performance current and voltage sensing applications in high-voltage systems.

Featured isolated modulators

Isolated modulator and ADC technologies

Our portfolio includes isolated delta-sigma ADCs with a fully integrated, isolated DC/DC converter that enables single-supply operation from the low side of the device.

Benefits:

Built-in data and power isolation allows for phase-to-phase isolation for polyphase shunt metering applications.
Synchronization between devices allows high system accuracy up to Class 0.1.
Built-in temperature sensor allows for easy temperature compensation.

View our isolated ADCs with SPI output

REFERENCE DESIGN

One-phase shunt power meter reference design with isolated ADC

This reference design implements a single-phase energy meter using standalone isolated multichannel analog to-digital converters (ADC) to sample a shunt current sensor.

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REFERENCE DESIGN

Single-phase and split-phase shunt energy metrology reference design

This reference design implements a single-phase with neutral or split-phase energy measurement subsystem using one isolated and one non-isolated standalone multichannel analog-to-digital converters (ADCs) with two shunts.

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REFERENCE DESIGN

Polyphase shunt class 0.2% metrology

This reference design implements class 0.2S three-phase energy measurement using an isolated high-performance, multichannel analog-to-digital converter (ADC) and achieves high accuracy across a wide input current range.

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Isolated ADCs

AMC131M03ACTIVE

Three-channel, simultaneous-sampling 24-bit isolated delta-sigma ADC

Isolated ADCs

AMC131M02ACTIVE

24-bit, 32-kSPS, 2-channel, simultaneous-sampling, delta-sigma ADC

Isolated ADCs

AMC130M02ACTIVE

Two-channel, simultaneously-sampling, 16-bit, isolated delta-sigma ADC

Our isolated current-sensing modulators provide functional, basic, and reinforced isolation options with low offset, gain error, and drift for higher accuracy in the range of 0.1%-2%.

Benefits:

Galvanic isolation with high transient immunity up to 150V/ns.
Internal clock solutions for simplified PCB design and signal routing.
External clock solutions for simplified system-level synchronization.

Explore our isolated current-sensing modulators

REFERENCE DESIGN

48V, 4kW small form-factor three-phase inverter reference design for integrated motor drives

This reference design demonstrates a three-phase inverter with a nominal 48V DC input and 85Arms output current rating for motor drive applications.

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REFERENCE DESIGN

48V, 16A small form factor three-phase GaN inverter reference design for integrated motor drives

This reference design demonstrates a high-power density 12V to 60V 3-phase power stage specifically for motor-integrated servo drives and robotics applications.

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REFERENCE DESIGN

3.6kW single-phase totem-pole bridgeless PFC reference design with e-meter functionality

This reference design is a GaN based, 3.6kW, single-phase continuous conduction mode (CCM) totem-pole bridgeless power factor correction (PFC) converter, targeting M-CRPS power supply with e-metering functionality.

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Isolated ADCs

AMC0106M25ACTIVE

±250mV input functionally isolated delta-sigma modulator for current sensing

Isolated ADCs

AMC3306M25ACTIVE

±250-mV input, precision current sensing reinforced isolated modulator with integrated DC/DC

Isolated ADCs

AMC1306M25ACTIVE

±250-mV input, precision current sensing reinforced isolated modulator

Our isolated voltage-sensing modulators provides optimized voltage sensing with higher input impedance up to 1.5 GΩ, input voltage range of +/- 1V, +/- 400V, +/- 600V, and low input bias current specifications.

Benefits:

External clock solutions for simplified system-level synchronization.
Improved signal-to-noise ratio with high input voltage range.
Options of solutions with integrated high-voltage resistors for better than 1% system-level accuracy and solution size reduction.

Explore our isolated voltage-sensing modulators

REFERENCE DESIGN

High-power, high-performance automotive SiC traction inverter reference design

This reference design demonstrates the traction inverter system technology from TI and Wolfspeed, which improves system efficiency with a high-performance isolated gate driver and real-time variable gate drive strength.

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Application note

Increased Accuracy and Performance with Integrated High Voltage Resistor Isolated Amplifiers and Modulators (Rev. A)

Learn about integrated high-voltage resistor amplifiers and modulators for hybrid electric vehicles, energy infrastructure and motor-drive applications.

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White paper

Comparing Isolated Amplifiers and Isolated Modulators (Rev. B)

This document compares isolated amplifiers and isolated-modulator-based solutions and explains some unique advantages of isolated-modulator-based solutions.

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Isolated ADCs

AMC0386ACTIVE

AC input isolated modulator with integrated resistive divider and external clock

Isolated ADCs

AMC3336ACTIVE

±1-V input, precision voltage sensing reinforced isolated modulator with integrated DC/DC

Isolated ADCs

AMC0336ACTIVE

±1V input reinforced isolated modulator for AC voltage sensing

Technical Resources

E-book

An Engineer's Guide to Isolated Signal Chain Solutions

This e-book was created to simplify the current and voltage sensing design process by helping you quickly and efficiently narrow down the list of potential devices that align best with your particular system’s requirements.

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White paper

Comparing Isolated Amplifiers and Isolated Modulators (Rev. B)

This document compares isolated amplifiers and isolated-modulator-based solutions, and explains some unique advantages of isolated-modulator-based solutions.

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Selection guide

Understanding isolation terminology and relevance

This quick guide can serve as a reference for experienced designers or a starting point for engineers who are new to understanding isolation technologies.

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Design & development resources

Reference design

Isolated, Shunt-Based Current Sensing Reference Design

This verified reference design implements isolated current sensing data acqusition based on AMC1304M25 isolated delta-sigma (ΔΣ) modulator and TMS320F28377D microcontroller. This design was made for shunt-based current measurement applications which require excellent galvanic (...)

Reference design

Isolated Current Shunt and Voltage Measurement Reference Design for Motor Drives

This evaluation kit and reference design implements the AMC130x reinforced isolated delta-sigma modulators along with integrated Sinc filters in the C2000™ TMS320F28377D Delfino™ microcontroller. The design provides an ability to evaluate the performance of these measurements: three motor (...)

Reference design

Extended Current and Voltage Measurement Using Shunts for Protection Relays Reference Design

This reference design demonstrates a unique approach for extending current measurement range using a single shunt and voltage measurement AMC1304Mx5 isolated delta-sigma (ΔΣ) modulator. With careful selection of a low-value shunt resistor that minimizes power dissipation, a (...)