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Texas Instruments AMC3306M05/AMC3306M05-Q1 Delta-Sigma Modulator

Texas Instruments AMC3306M05/AMC3306M05-Q1 Precision Delta-Sigma (ΔΣ) Modulator is a precision, isolated delta-sigma (ΔΣ) modulator optimized for shunt-based current measurements. The fully integrated isolated DC/DC converter allows single-supply operation from the low side of the device, which makes the device a unique solution for space-constrained applications. The reinforced capacitive isolation barrier is certified according to VDE V 0884-11 and UL1577 and supports a working voltage of up to 1.2kVRMS. The isolation barrier separates parts of the system that operate on different common-mode voltage levels and protects the low-voltage side from hazardous voltages and damage.

The input of the Texas Instruments AMC3306M05/AMC3306M05-Q1 is optimized for direct connection to a low-impedance shunt resistor or other low-impedance voltage sources with low signal levels. The excellent DC accuracy and low-temperature drift support accurate current measurements over the extended industrial temperature range from –40°C to +125°C. Using a digital filter (such as a sinc3 filter) to decimate the bitstream, the device can achieve 16 bits of resolution with a dynamic range of 85dB at a data rate of 78kSPS. The AMC3306M05-Q1 devices are AEC-Q100 qualified for automotive applications.

Features

  • 3.3V or 5V single supply with integrated DC/DC converter
  • ±50mV input voltage range optimized for current measurement using shunt resistors
  • Low DC errors
    • ±50µV (max) offset error
    • ±0.4µV/°C (max) offset drift
    • ±0.2% (max) gain error
    • ±35ppm/°C (max) gain drift
  • 75kV/µs (min) high CMTI
  • System-level diagnostic features
  • Low EMI: meets CISPR-11 and CISPR-25 standards
  • Safety-related certifications
    • 6000VPEAK reinforced isolation per DIN VDE V 0884-11
    • 4250VRMS isolation for 1 minute per UL1577
  • Fully specified over the extended industrial temperature range (–40°C to +125°C)

Features

  • Compact, isolated shunt-based current sensing in
    • Protection relays
    • Motor drives
    • Power supplies
    • Photovoltaic inverters

Typical Application

Application Circuit Diagram - Texas Instruments AMC3306M05/AMC3306M05-Q1 Delta-Sigma Modulator

Additional Resources

Development Tool

Texas Instruments AMC3306EVM/AMC3336EVM Amplifier Evaluation Modules

For evaluating the AMC3306/AMC3336, an isolated amplifier with an integrated DC/DC converter.

Learn Moreacerca de Texas Instruments AMC3306EVM/AMC3336EVM Amplifier Evaluation Modules View Productsrelacionado con Texas Instruments AMC3306EVM/AMC3336EVM Amplifier Evaluation Modules
Publicado: 2021-01-21 | Actualizado: 2025-05-15