GENERAL DESCRIPTION

The 71M6103/71M6113/71M6201/71M6203/71M6601/71M6603 (71M6xxx) isolated sensor ICs enable Teridian’s 4th-generation polyphase-metering 71M654x systems-on-chips (SoCs) to use nonisolating sensors such as resistive shunts without the need for costly and nonlinear isolation transformers or CTs. Isolation is provided by low-cost pulse transformers that form a bidirectional digital communication link between the 71M654x and the isolated sensor ICs.

The 71M6xxx isolated sensor ICs contain a 22-bit delta-sigma ADC, an amplifier with differential inputs, a precision voltage reference, a temperature sensor, and a supply voltage generator that is energized by power pulses provided by the 71M654x.

In conjunction with the 71M654x metering SoCs, the isolated sensor ICs offer unprecedented BOM cost reduction, immunity to magnetic tampering, and enhanced reliability for single-phase and polyphase applications.

FEATURES

• 0.1% Accuracy Over 2000:1 Current Range

• Exceeds IEC 62053/ANSI C12.20 Standards

• Compatible with Shunt Resistors as Low as 50μΩ

• On-Chip Temperature Sensor Enables Localized Digital Temperature Compensation by the 71M654x

• 22-Bit ADC

• Powered from the 71M654x Using Pulses Sent Through the Transformer

• 3.3mW Typical Consumption

• On-Chip Power Monitoring

• Industrial Temperature Range

• 8-Pin Lead(Pb)-Free SO Package