ACPL-C740-500E

Overview

The ACPL-C740-500E is a one-bit, second-order sigma-delta modulator from Broadcom Limited that utilizes optical coupling technology to convert analog input signals into high-speed digital data streams with electrical isolation. Powered by a single 5 V supply, the device integrates a 20 MHz internal clock for continuous oversampling of differential inputs within a ±200 mV linear range (±320 mV full scale). It achieves 16-bit resolution without missing codes and an 86 dB signal-to-noise ratio. The component operates within a temperature range of –40°C to +110°C and features a stretched SO-8 (SSO-8) package designed for enhanced insulation reliability.

Feature Summary

• Integrated 20 MHz internal clock enables continuous analog-to-digital conversion via sigma-delta modulation
• High-resolution performance with 16-bit resolution, no missing codes, and 86 dB SNR
• Robust isolation specifications including 25 kV/µs common-mode transient immunity and 1414 V peak working insulation voltage
• Wide digital interface power range supporting 3 V to 5.5 V logic levels

Applications

• Servo drives and motor control systems
• Motor phase and supply rail current detection
• Power inverter current sensing
• Industrial process control and data acquisition systems
• Replacement for traditional current transmitters in cost-sensitive designs

Procurement Notes

Verify the specific suffix '500E' against the manufacturer's latest documentation to confirm packaging configuration and compliance status. Ensure the order matches the SSO-8 stretched package dimensions required for the target PCB layout. Cross-reference regulatory certifications such as UL 1577 and IEC/EN/DIN EN 60747-5-5 with current safety approval lists before finalizing procurement.

Selection Notes

Select this component when high-resolution analog isolation is required for low-level signal sources like shunt resistors. The integrated 20 MHz clock eliminates the need for external timing circuits, simplifying board design. Verify that the system can accommodate the necessary digital filtering to reconstruct the original signal from the 20 MHz data stream. Confirm that the 5 V single-supply requirement aligns with the available power rails in the application.

Part Context

This device belongs to the ACPL series of optically isolated components manufactured by Broadcom Limited. It represents a specialized class of sigma-delta modulators designed to replace conventional current transmitters in motor drive applications. The part number identifies the specific variant with the 500E suffix, indicating the standard reel packaging format for surface-mount assembly.

Replacement Considerations

Direct pin-compatible replacements are not explicitly listed in the provided source material. Designers should evaluate other Broadcom ACPL-C74x variants or comparable sigma-delta isolators only if they match the 20 MHz clock frequency, 16-bit resolution, and SSO-8 package constraints.