AMC3306M25 Series
±250-mV input, precision current sensing reinforced isolated modulator with integrated DC/DC
Manufacturer: Texas Instruments
Catalog
±250-mV input, precision current sensing reinforced isolated modulator with integrated DC/DC
Key Features
• 3.3-V or 5-V single supply with integrated DC/DC converter±250-mV input voltage range optimized for current measurement using shunt resistorsLow DC errors:Offset error: ±50 µV (max)Offset drift: ±1 µV/°C (max)Gain error: ±0.2% (max)Gain drift: ±35 ppm/°C (max)High CMTI: 75 kV/µs (min)System-level diagnostic featuresLow EMI: Meets CISPR-11 and CISPR-25 standardsSafety-related certifications:6000-VPEAKreinforced isolation per DIN VDE V 0884-114250-VRMSisolation for 1 minute per UL1577Fully specified over the extended industrial temperature range: –40°C to +125°C3.3-V or 5-V single supply with integrated DC/DC converter±250-mV input voltage range optimized for current measurement using shunt resistorsLow DC errors:Offset error: ±50 µV (max)Offset drift: ±1 µV/°C (max)Gain error: ±0.2% (max)Gain drift: ±35 ppm/°C (max)High CMTI: 75 kV/µs (min)System-level diagnostic featuresLow EMI: Meets CISPR-11 and CISPR-25 standardsSafety-related certifications:6000-VPEAKreinforced isolation per DIN VDE V 0884-114250-VRMSisolation for 1 minute per UL1577Fully specified over the extended industrial temperature range: –40°C to +125°C
Description
AI
The AMC3306M25 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 1.2 kVRMS.
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 AMC3306M25 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.
By using a digital filter (such as a sinc3filter) to decimate the bitstream, the device can achieve 16 bits of resolution with a dynamic range of 85 dB at a data rate of 78 kSPS.
The AMC3306M25 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 1.2 kVRMS.
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 AMC3306M25 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.
By using a digital filter (such as a sinc3filter) to decimate the bitstream, the device can achieve 16 bits of resolution with a dynamic range of 85 dB at a data rate of 78 kSPS.
