ACPL-C79B, ACPL-C79A, ACPL-C790 Precision Miniature Isolation Amplifiers Data Sheet Description Features The ACPL-C79B/C79A/C790 isolation amplifiers are 0.5% High Gain Accuracy (ACPL-C79B) designed for current and voltage sensing in electronic 50 ppm/C Low Gain Drift power converters in applications including motor drives 0.4 mV Input Oset ff Voltage and renewable energy systems. In a typical motor drive implementation, current flows through an external 0.05% Excellent Linearity resistor and the resulting analog voltage drop is sensed by 62 dB SNR the isolation amplifier. A differential output voltage that is 200 kHz Wide Bandwidth proportional to the current is created on the other side of the optical isolation barrier. 3 V to 5.5 V Wide Supply Range for Output Side 40C to +105C Operating Temperature Range For general applications, the ACPL-C79A (1% gain tolerance) and the ACPL-C790 (3% gain tolerance) Advanced Sigma-Delta (-) A/D Converter Technology are recommended. For high precision applications, the Fully Differential Isolation Amplifier ACPL-C79B (0.5% gain tolerance) can be used. The 15 kV/s Common-Mode Transient Immunity product operates from a single 5 V supply and provides excellent linearity and dynamic performance of 62 dB SNR. Compact, Auto-Insertable Stretched SO-8 Package With 200 kHz bandwidth, 1.6 s fast response time, the Safety and Regulatory Approvals: product captures transients in short circuit and overload IEC/EN/DIN EN 60747-5-5: 1414 Vpeak working conditions. The high common-mode transient immunity insulation voltage (15 kV/ s) of the ACPL-C79B/C79A/C790 provides the UL 1577: 5000 Vrms/1min double protection rating precision and stability needed to accurately monitor motor current in high noise motor control environments, CSA: Component Acceptance Notice 5 providing for smoother control (less torque ripple) in Applications various types of motor control applications. Current/Voltage Sensing in AC and Servo Motor Drives Combined with superior optical coupling technology, the ACPL-C79B/C79A/C790 implements sigma-delta ( -) Solar Inverters, Wind Turbine Inverters analog-to-digital converter, chopper stabilized ampli- Industrial Process Control fiers, and a fully differential circuit topology to provide Data acquisition systems unequaled isolation-mode noise rejection, low offset, high gain accuracy and stability. This performance is Switching Power Supply Signal Isolation delivered in a compact, auto-insertable Stretched SO-8 General Purpose Analog Signal Isolation (SSO-8) package that meets worldwide regulatory safety Traditional Current Transducer Replacements standards. Functional Diagram I I DD1 DD2 V DD1 1 8 V DD2 V IN+ 2 7 V + OUT+ + - V IN- 3 6 V - OUT- NOTE: GND1 4 5 GND2 A 0.1 F bypass capacitor must be connected SHIELD between pins 1 and 4 and between pins 5 and 8. Figure 1. CAUTION: It is advised that normal static precautions be taken in handling and assembly of this component to prevent damage and/or degradation which may be induced by ESD. Table 1. Pin Description Pin No. Symbol Description 1 V Supply voltage for input side (4.5 V to 5.5 V), relative to GND1 DD1 2 V Positive input ( 200 mV recommended) IN+ 3 V Negative input (normally connected to GND1) IN 4 GND1 Input side ground 5 GND2 Output side ground 6 V Negative output OUT 7 V Positive output OUT+ 8 V Supply voltage for output side (3 V to 5.5 V), relative to GND2 DD2 Table 2. Ordering Information ACPL-C79B/C79A/C790 is UL recognized with 5000 Vrms/1 minute rating per UL 1577. Option Surface Tape & IEC/EN/DIN EN Part number (RoHS Compliant) Package Mount Reel 60747-5-5 Quantity ACPL-C79B -000E Stretched X X 80 per tube ACPL-C79A SO-8 -500E X X X 1000 per reel ACPL-C790 To order, choose a part number from the part number column and combine with the desired option from the option column to form an order entry. Example: ACPL-C79B-500E to order product of Surface Mount package in Tape and Reel packaging with IEC/EN/DIN EN 60747-5-5 Safety Approval and RoHS compliance. Option datasheets are available. Contact your Avago sales representative or authorized distributor for information. 2