Datasheet HCPL-7800A, HCPL-7800 (Broadcom)

Data Sheet HCPL-7800A/HCPL-7800 Isolation Amplifer Description
Together, these features deliver unequaled isolation-mode noise rejection, as well as excellent offset and gain accuracy The Broadcom® HCPL-7800A/HCPL-7800 (hereinafter and stability over time and temperature. This performance is referred to as HCPL-7800(A)), isolation amplifier family is delivered in a compact, auto-insertable, industry standard designed for current sensing in electronic motor drives. In a 8-pin DIP package that meets worldwide regulatory safety typical implementation, motor currents flow through an standards. (A gull-wing surface mount option #300 is also external resistor and the resulting analog voltage drop is available). sensed by the HCPL-7800(A). A differential output voltage is created on the other side of the HCPL-7800(A) optical
Features
isolation barrier. This differential output voltage is proportional to the motor current and can be converted to a 15 kV/µs common-mode rejection at VCM = 1000V single-ended signal by using an op-amp as shown in the Compact, auto-insertable standard 8-pin DIP package recommended application circuit. Because common-mode 0.00025-V/V/°C gain drift vs. temperature voltage swings of several hundred volts in tens of 0.3-mV input offset voltage nanoseconds are common in modern switching inverter 100-kHz bandwidth motor drives, the HCPL-7800(A) is designed to ignore very 0.004% nonlinearity high common-mode transient slew rates (of at least 10 kV/µs). Worldwide Safety Approval: UL 1577 (3750 Vrms/1 min.) and CSA, IEC/EN/DIN EN 60747-5-5 The high CMR capability of the HCPL-7800(A) isolation Advanced Sigma-Delta (-) A/D converter technology amplifier provides the precision and stability needed to Fully differential circuit topology accurately monitor motor current in high-noise motor control environments, providing for smoother control (less “torque
Applications
ripple”) in various types of motor control applications. Motor phase and rail current sensing The product can also be used for general analog signal Inverter current sensing isolation applications requiring high accuracy, stability, and Switched mode power supply signal isolation linearity under similarly severe noise conditions. For general General-purpose current sensing and monitoring applications, use the HCPL-7800 (gain tolerance of ± 3%). General-purpose analog signal isolation For precision applications, use the HCPL-7800A with part-to-part gain tolerance of ± 1%. The HCPL-7800(A) uses sigma-delta (-) analog-to-digital converter technology, chopper-stabilized amplifiers, and a fully differential circuit topology.
CAUTION!
Take normal static precautions when handling and assembling this component to prevent damage, degradation, or both, that may be induced by ESD. The components featured in this data sheet are not to be used in military or aerospace applications or environments. The components are not AEC-Q100 qualified and are not recommended for automotive applications. Broadcom AV02-0410EN November 19, 2020 Document Outline Description Features Applications Functional Diagram Ordering Information Package Outline Drawings Standard DIP Package Gull Wing Surface Mount Option 300 Solder Reflow Profile Regulatory Information IEC/EN/DIN EN 60747-5-5 Insulation Characteristics Insulation and Safety-Related Specifications Absolute Maximum Ratings Recommended Operating Conditions DC Electrical Specifications AC Electrical Specifications Package Characteristics Application Information Power Supplies and Bypassing PC Board Layout Current Sensing Resistors Sense Resistor Connections Output Side Frequently Asked Questions about the HCPL-7800(A) Basics Sense Resistor and Input Filter Isolation and Insulation Accuracy Power Supplies and Start-Up Miscellaneous