1 Features
• AEC-Q100 qualified for automotive applications:
– Temperature grade 1: –40°C to +125°C, TA
• Single-supply operation (3.3V or 5V) with
integrated DC/DC converter
• Input voltage range (±250mV) optimized for current
measurement using shunt resistors
• Low DC errors:
– Offset error: ±50μV (max)
– Offset drift: ±1μV/°C (max)
– Gain error: ±0.2% (max)
– Gain drift: ±35ppm/°C (max)
• High CMTI: 75kV/μs (min)
• System-level diagnostic features
• Low EMI: Meets CISPR-11 and CISPR-25
standards
• Safety-related certifications:
– 6000VPK reinforced isolation per DIN EN IEC
60747-17 (VDE 0884-17)
– 4250VRMS isolation for 1 minute per UL1577

2 Applications
• Compact, isolated shunt-based current sensing in:
– HEV/EV onboard chargers (OBC)
– HEV/EV DC/DC converters
– HEV/EV traction inverters
– HEV/EV battery management system (BMS)

3 Description
The AMC3306M25-Q1 is a precision, isolated deltasigma
(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 DIN EN IEC 60747-17 (VDE 0884-17)
and UL1577 and supports a working voltage 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 AMC3306M25-Q1 is optimized
for direct connection to a low-impedance shunt
resistor or other, low-impedance voltage source
with low signal levels. The excellent DC accuracy
and low temperature drift supports accurate
current measurements over the extended industrial
temperature range from –40°C to +125°C.
Use a digital filter (such as a sinc3 filter) to decimate
the bitstream. By using this digital filter, the device
achieves 16 bits of resolution with an 85dB dynamic
range at a data rate of 78kSPS.