Product Summary

The A7800 is a high CMR isolation amplifier. The device provides a unique combination of features ideally suited for motor control circuit designers. The A7800 provides the precision and stability needed to accurately monitor motor current in highnoise motor control environments, providing for smoother control (less torque ripple) in various types of motor control applications. The applications of the A7800 include Motor Phase Current Sensing, General Purpose Current Sensing, High-Voltage Power Source Voltage Monitoring, Switch-Mode Power Supply Signal Isolation, General Purpose Analog Signal Isolation and Transducer Isolation. The A7800 utilizes sigmadelta analog-to-digital converter technology, chopper stabilized amplifiers, and a fully differential circuit topology fabricated using 1 mm CMOS IC process.

Parametrics

A7800 absolute maximum ratings: (1)Storage Temperature, TS: -55 to 125℃; (2)Ambient Operating Temperature, TA: - 40 to 100℃; (3)Supply Voltages, VDD1, VDD2: 0.0 to 5.5 V; (4)Steady-State Input Voltage, VIN+, VIN-: -2.0 to VDD1 +0.5 V; (5)Two Second Transient Input Voltage: -6.0V min; (6)Output Voltages, VOUT+, VOUT-: -0.5 to VDD2 +0.5 V; (7)Lead Solder Temperature (1.6 mm below seating plane, 10 sec.), TLS: 260℃ max.

Features

A7800 features: (1)15 kV/ms Common-Mode Rejection at VCM = 1000 V; (2)Compact, Auto-Insertable Standard 8-pin DIP Package; (3)4.6 μV/℃ Offset Drift vs. Temperature; (4)0.9 mV Input Offset Voltage; (5)85 kHz Bandwidth; (6)0.1% Nonlinearity; (7)Worldwide Safety Approval: UL 1577 (3750 V rms/1 min), VDE 0884 and CSA; (8)Advanced Sigma-Delta (SD) A/D Converter Technology; (9)Fully Differential Circuit Topology; (10)1 μm CMOS IC Technology.

Diagrams

A7800 pin connection