CA-IS1204W Datasheet | Chipanalog

Shanghai Chipanalog Microelectronics Co., Ltd. CA‐IS1204W Version 1.03 CA‐IS1204 Isolated Sigma‐Delta Modulator for Current Sensing 1 Key Features - Differential Input Voltage Range: ±250 m V - Ultra‐Low Input Offset Voltage and Drift - ±1m V (max) @ 25°C input offset voltage - Low Gain Error and Drift - ±2% (max) @ 25°C gain error - Excellent AC Performance - SNR: 85d B (typ) - THD: ‐91d B (typ) - Robust Isolation Barrier: ±150 k V/μs typical CMTI - Fault Diagnostic Functions Improve System Safety - Wide Operating Temperature Range: - 40°C to 125°C - 16‐pin wide‐body SOIC package - Safety Regulatory Approvals: - VDE 0884‐17 isolation certification - UL according to UL1577 - IEC 61010‐1:2010+A1 certifications 2 Applications - Industrial Motor Controls and Drives - Uninterruptible Power Supplies (UPS) - Isolated Power Supply 3 Description The CA‐IS1204 device is series of precision isolated sigma‐ delta (Σ‐Δ) modulator and optimized for shunt resistor‐ based current sensing or other small signal measurement applications. The input current‐sense amplifier monitors current flow through a shunt (sense) resistor and the sigma‐delta modulator converts the analog input to a digital bit stream of 1's and 0's at a much higher frequency. The digital output stage of CA‐IS1204 provides uncoded CMOS bit‐stream output. The analog input‐side (high‐side) and digital output‐side (low‐side) are separated by unique silicon oxide (Si O2) capacitive isolation barriers that provide up to 5k VRMS galvanic isolation per UL1577 certification, and isolator driver transfers the modulator output across this isolation barrier. In systems with different voltage domains, this isolation technical is typically used to protect the low voltage side from the high voltage side in case of any faults. These devices also feature up to 150k V/μs mon mode transient immunity and enable efficient signal transmission in noisy environments. The CA‐IS1204 device Features low input voltage range (±250m V) that...