ACPL-C740-500E

ACPL-C740-500E is an optically isolated sigma-delta modulator. It is a 1-bit, second-order sigma-delta (Σ-Δ) modulator that converts an analogue input signal into a high-speed data stream with galvanic isolation based on optical coupling technology. The differential inputs of ±200mV (full scale ±320mV) are ideal for direct connection to shunt resistors or other low-level signal sources in applications, such as motor phase current measurement. The analogue input is continuously sampled by a means of sigma-delta oversampling using an onboard clock. Safety and regulatory approval: IEC/EN/DIN EN 60747-5-5: 1414 Vpeak working insulation voltage, UL 1577: 5000 Vrms/1 min isolation voltage, CSA: Component Acceptance Notice #5. Applications include motor phase and rail current sensing, power inverter current and voltage sensing, industrial process control, data acquisition systems, general-purpose current and voltage sensing, traditional current transducer replacements.

• Superior optical isolation and insulation
• 20MHz internal clock, internal reference voltage
• ±200mV linear range with single 5V supply (±320mV full scale)
• 3V to 5.5V wide supply range for digital interface
• Operating temperature range from -40°C to +110°C
• SSO-8 package
• 25-kV/µs common-mode transient immunity at VCM = 1kV
• Offset drift vs. temperature is 0.3µV/°C typ at VDD1 = 5V, Rsense = 0 ohm
• Internal reference voltage is 320mV typ at TA = –40°C to 110°C, VDD1 = 4.5 to 5.5V, VDD2 = 3 to 5.5V
• Signal-to-noise ratio is 86dB typ at TA = -40°C to +110°C